/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/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/nested_delay_nd.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7390193 [2022-04-05 01:07:35,580 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-05 01:07:35,582 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-05 01:07:35,615 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-05 01:07:35,627 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-05 01:07:35,629 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-05 01:07:35,629 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-05 01:07:35,631 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-05 01:07:35,632 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-05 01:07:35,632 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-05 01:07:35,633 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-05 01:07:35,637 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-05 01:07:35,638 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-05 01:07:35,639 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-05 01:07:35,639 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-05 01:07:35,640 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-05 01:07:35,641 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-05 01:07:35,645 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-05 01:07:35,650 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-05 01:07:35,650 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-05 01:07:35,651 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-05 01:07:35,652 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-04-05 01:07:35,660 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-05 01:07:35,661 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-05 01:07:35,662 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-05 01:07:35,662 INFO L138 SettingsManager]: * sizeof long=4 [2022-04-05 01:07:35,662 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-05 01:07:35,662 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-04-05 01:07:35,662 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-05 01:07:35,662 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-05 01:07:35,662 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-05 01:07:35,663 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-05 01:07:35,663 INFO L138 SettingsManager]: * sizeof long double=12 [2022-04-05 01:07:35,663 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-05 01:07:35,663 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-05 01:07:35,663 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-05 01:07:35,663 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-05 01:07:35,663 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-05 01:07:35,663 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-05 01:07:35,663 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-05 01:07:35,663 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 01:07:35,664 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-05 01:07:35,664 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-05 01:07:35,664 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-04-05 01:07:35,664 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-05 01:07:35,839 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-05 01:07:35,853 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-05 01:07:35,855 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-05 01:07:35,855 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-05 01:07:35,858 INFO L275 PluginConnector]: CDTParser initialized [2022-04-05 01:07:35,859 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/nested_delay_nd.c [2022-04-05 01:07:35,915 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/69b49e50c/f05ccdb2f7b54be38e4c6740a3a97494/FLAGab52d3f8d [2022-04-05 01:07:36,258 INFO L306 CDTParser]: Found 1 translation units. [2022-04-05 01:07:36,259 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/nested_delay_nd.c [2022-04-05 01:07:36,262 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/69b49e50c/f05ccdb2f7b54be38e4c6740a3a97494/FLAGab52d3f8d [2022-04-05 01:07:36,271 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/69b49e50c/f05ccdb2f7b54be38e4c6740a3a97494 [2022-04-05 01:07:36,273 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-05 01:07:36,274 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-04-05 01:07:36,275 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-05 01:07:36,275 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-05 01:07:36,280 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-05 01:07:36,280 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 01:07:36" (1/1) ... [2022-04-05 01:07:36,281 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4aedf56e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 01:07:36, skipping insertion in model container [2022-04-05 01:07:36,281 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 01:07:36" (1/1) ... [2022-04-05 01:07:36,286 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-05 01:07:36,298 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-05 01:07:36,414 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/nested_delay_nd.c[465,478] [2022-04-05 01:07:36,425 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 01:07:36,430 INFO L203 MainTranslator]: Completed pre-run [2022-04-05 01:07:36,437 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/nested_delay_nd.c[465,478] [2022-04-05 01:07:36,441 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 01:07:36,448 INFO L208 MainTranslator]: Completed translation [2022-04-05 01:07:36,449 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 01:07:36 WrapperNode [2022-04-05 01:07:36,449 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-05 01:07:36,450 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-05 01:07:36,450 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-05 01:07:36,450 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-05 01:07:36,456 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 01:07:36" (1/1) ... [2022-04-05 01:07:36,457 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 01:07:36" (1/1) ... [2022-04-05 01:07:36,460 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 01:07:36" (1/1) ... [2022-04-05 01:07:36,460 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 01:07:36" (1/1) ... [2022-04-05 01:07:36,463 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 01:07:36" (1/1) ... [2022-04-05 01:07:36,466 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 01:07:36" (1/1) ... [2022-04-05 01:07:36,466 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 01:07:36" (1/1) ... [2022-04-05 01:07:36,467 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-05 01:07:36,468 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-05 01:07:36,468 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-05 01:07:36,468 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-05 01:07:36,470 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 01:07:36" (1/1) ... [2022-04-05 01:07:36,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 01:07:36,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 01:07:36,492 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 01:07:36,493 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 01:07:36,521 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-05 01:07:36,521 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-05 01:07:36,521 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-05 01:07:36,521 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-05 01:07:36,522 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-05 01:07:36,522 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-05 01:07:36,522 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-05 01:07:36,522 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-05 01:07:36,522 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-05 01:07:36,522 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-05 01:07:36,522 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-05 01:07:36,522 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-05 01:07:36,523 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-05 01:07:36,523 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-05 01:07:36,523 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-05 01:07:36,523 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-05 01:07:36,523 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-05 01:07:36,523 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-05 01:07:36,523 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-05 01:07:36,523 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-05 01:07:36,566 INFO L234 CfgBuilder]: Building ICFG [2022-04-05 01:07:36,567 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-05 01:07:36,697 INFO L275 CfgBuilder]: Performing block encoding [2022-04-05 01:07:36,701 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-05 01:07:36,701 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-04-05 01:07:36,702 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 01:07:36 BoogieIcfgContainer [2022-04-05 01:07:36,702 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-05 01:07:36,703 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-04-05 01:07:36,703 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-04-05 01:07:36,712 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-04-05 01:07:36,714 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 01:07:36" (1/1) ... [2022-04-05 01:07:36,716 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_JORDAN [2022-04-05 01:07:36,728 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 05.04 01:07:36 BasicIcfg [2022-04-05 01:07:36,728 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-04-05 01:07:36,731 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-05 01:07:36,732 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-05 01:07:36,733 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-05 01:07:36,734 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.04 01:07:36" (1/4) ... [2022-04-05 01:07:36,734 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bd0d4aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 01:07:36, skipping insertion in model container [2022-04-05 01:07:36,734 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 01:07:36" (2/4) ... [2022-04-05 01:07:36,734 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bd0d4aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 01:07:36, skipping insertion in model container [2022-04-05 01:07:36,734 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 01:07:36" (3/4) ... [2022-04-05 01:07:36,735 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bd0d4aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.04 01:07:36, skipping insertion in model container [2022-04-05 01:07:36,735 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 05.04 01:07:36" (4/4) ... [2022-04-05 01:07:36,736 INFO L111 eAbstractionObserver]: Analyzing ICFG nested_delay_nd.cJordan [2022-04-05 01:07:36,739 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-04-05 01:07:36,739 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-05 01:07:36,774 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-05 01:07:36,778 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-04-05 01:07:36,778 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-05 01:07:36,790 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 24 states have internal predecessors, (34), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-05 01:07:36,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-04-05 01:07:36,806 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 01:07:36,806 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 01:07:36,806 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 01:07:36,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 01:07:36,810 INFO L85 PathProgramCache]: Analyzing trace with hash -414317756, now seen corresponding path program 1 times [2022-04-05 01:07:36,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 01:07:36,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061451885] [2022-04-05 01:07:36,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 01:07:36,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 01:07:36,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 01:07:36,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 01:07:36,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 01:07:36,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-05 01:07:36,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 01:07:37,003 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 01:07:37,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 01:07:37,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061451885] [2022-04-05 01:07:37,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061451885] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 01:07:37,004 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 01:07:37,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-05 01:07:37,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762793084] [2022-04-05 01:07:37,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 01:07:37,008 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-05 01:07:37,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 01:07:37,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-05 01:07:37,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-05 01:07:37,026 INFO L87 Difference]: Start difference. First operand has 32 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 24 states have internal predecessors, (34), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-05 01:07:37,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 01:07:37,082 INFO L93 Difference]: Finished difference Result 27 states and 33 transitions. [2022-04-05 01:07:37,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-05 01:07:37,086 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21 [2022-04-05 01:07:37,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 01:07:37,091 INFO L225 Difference]: With dead ends: 27 [2022-04-05 01:07:37,091 INFO L226 Difference]: Without dead ends: 27 [2022-04-05 01:07:37,095 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 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 01:07:37,103 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 8 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 01:07:37,103 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 35 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 01:07:37,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-04-05 01:07:37,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-04-05 01:07:37,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-05 01:07:37,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2022-04-05 01:07:37,126 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 21 [2022-04-05 01:07:37,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 01:07:37,126 INFO L478 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2022-04-05 01:07:37,127 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-05 01:07:37,127 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2022-04-05 01:07:37,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-04-05 01:07:37,128 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 01:07:37,128 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 01:07:37,128 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-05 01:07:37,128 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 01:07:37,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 01:07:37,130 INFO L85 PathProgramCache]: Analyzing trace with hash 1035089572, now seen corresponding path program 1 times [2022-04-05 01:07:37,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 01:07:37,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233367899] [2022-04-05 01:07:37,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 01:07:37,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 01:07:37,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 01:07:37,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 01:07:37,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 01:07:37,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-05 01:07:37,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 01:07:37,253 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 01:07:37,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 01:07:37,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233367899] [2022-04-05 01:07:37,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233367899] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 01:07:37,254 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 01:07:37,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-05 01:07:37,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207120614] [2022-04-05 01:07:37,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 01:07:37,255 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-05 01:07:37,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 01:07:37,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-05 01:07:37,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-04-05 01:07:37,256 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-05 01:07:37,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 01:07:37,358 INFO L93 Difference]: Finished difference Result 31 states and 38 transitions. [2022-04-05 01:07:37,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-05 01:07:37,359 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2022-04-05 01:07:37,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 01:07:37,359 INFO L225 Difference]: With dead ends: 31 [2022-04-05 01:07:37,359 INFO L226 Difference]: Without dead ends: 31 [2022-04-05 01:07:37,360 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-04-05 01:07:37,360 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 39 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 01:07:37,361 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 25 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 01:07:37,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-04-05 01:07:37,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2022-04-05 01:07:37,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-05 01:07:37,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2022-04-05 01:07:37,364 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 21 [2022-04-05 01:07:37,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 01:07:37,365 INFO L478 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2022-04-05 01:07:37,365 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-05 01:07:37,365 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2022-04-05 01:07:37,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-04-05 01:07:37,365 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 01:07:37,365 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 01:07:37,366 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-05 01:07:37,366 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 01:07:37,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 01:07:37,366 INFO L85 PathProgramCache]: Analyzing trace with hash -2124918270, now seen corresponding path program 1 times [2022-04-05 01:07:37,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 01:07:37,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106612811] [2022-04-05 01:07:37,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 01:07:37,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 01:07:37,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 01:07:37,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 01:07:37,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 01:07:37,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-05 01:07:37,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 01:07:37,456 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 01:07:37,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 01:07:37,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106612811] [2022-04-05 01:07:37,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106612811] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 01:07:37,457 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 01:07:37,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 01:07:37,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849197664] [2022-04-05 01:07:37,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 01:07:37,457 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 01:07:37,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 01:07:37,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 01:07:37,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 01:07:37,458 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-05 01:07:37,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 01:07:37,535 INFO L93 Difference]: Finished difference Result 33 states and 42 transitions. [2022-04-05 01:07:37,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 01:07:37,535 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2022-04-05 01:07:37,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 01:07:37,537 INFO L225 Difference]: With dead ends: 33 [2022-04-05 01:07:37,537 INFO L226 Difference]: Without dead ends: 33 [2022-04-05 01:07:37,537 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 01:07:37,538 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 13 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 01:07:37,540 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 43 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 01:07:37,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-04-05 01:07:37,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 29. [2022-04-05 01:07:37,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 22 states have internal predecessors, (28), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-05 01:07:37,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2022-04-05 01:07:37,545 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 24 [2022-04-05 01:07:37,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 01:07:37,545 INFO L478 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2022-04-05 01:07:37,545 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-05 01:07:37,545 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2022-04-05 01:07:37,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-04-05 01:07:37,546 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 01:07:37,546 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 01:07:37,546 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-04-05 01:07:37,546 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 01:07:37,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 01:07:37,547 INFO L85 PathProgramCache]: Analyzing trace with hash -1237414589, now seen corresponding path program 1 times [2022-04-05 01:07:37,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 01:07:37,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354286621] [2022-04-05 01:07:37,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 01:07:37,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 01:07:37,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 01:07:37,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 01:07:37,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 01:07:37,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-05 01:07:37,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 01:07:37,645 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 01:07:37,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 01:07:37,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354286621] [2022-04-05 01:07:37,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354286621] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 01:07:37,645 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 01:07:37,645 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-05 01:07:37,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671246382] [2022-04-05 01:07:37,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 01:07:37,646 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-05 01:07:37,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 01:07:37,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-05 01:07:37,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-05 01:07:37,648 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-05 01:07:37,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 01:07:37,721 INFO L93 Difference]: Finished difference Result 40 states and 52 transitions. [2022-04-05 01:07:37,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-05 01:07:37,722 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2022-04-05 01:07:37,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 01:07:37,725 INFO L225 Difference]: With dead ends: 40 [2022-04-05 01:07:37,725 INFO L226 Difference]: Without dead ends: 40 [2022-04-05 01:07:37,726 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-04-05 01:07:37,729 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 89 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 01:07:37,730 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 36 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 01:07:37,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-04-05 01:07:37,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-04-05 01:07:37,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 32 states have internal predecessors, (43), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-05 01:07:37,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 52 transitions. [2022-04-05 01:07:37,741 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 52 transitions. Word has length 24 [2022-04-05 01:07:37,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 01:07:37,742 INFO L478 AbstractCegarLoop]: Abstraction has 40 states and 52 transitions. [2022-04-05 01:07:37,742 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-05 01:07:37,743 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 52 transitions. [2022-04-05 01:07:37,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-04-05 01:07:37,745 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 01:07:37,745 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 01:07:37,745 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-04-05 01:07:37,745 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 01:07:37,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 01:07:37,746 INFO L85 PathProgramCache]: Analyzing trace with hash -1236491068, now seen corresponding path program 1 times [2022-04-05 01:07:37,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 01:07:37,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581387537] [2022-04-05 01:07:37,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 01:07:37,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 01:07:37,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 01:07:37,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 01:07:37,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 01:07:37,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-05 01:07:37,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 01:07:37,820 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 01:07:37,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 01:07:37,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581387537] [2022-04-05 01:07:37,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581387537] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 01:07:37,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875931539] [2022-04-05 01:07:37,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 01:07:37,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 01:07:37,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 01:07:37,823 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 01:07:37,825 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 01:07:37,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 01:07:37,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-05 01:07:37,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 01:07:37,960 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 01:07:37,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 01:07:38,033 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 01:07:38,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875931539] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 01:07:38,033 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 01:07:38,034 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2022-04-05 01:07:38,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131821385] [2022-04-05 01:07:38,034 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 01:07:38,035 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-05 01:07:38,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 01:07:38,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-05 01:07:38,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-04-05 01:07:38,036 INFO L87 Difference]: Start difference. First operand 40 states and 52 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-04-05 01:07:38,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 01:07:38,132 INFO L93 Difference]: Finished difference Result 59 states and 77 transitions. [2022-04-05 01:07:38,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-05 01:07:38,132 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 24 [2022-04-05 01:07:38,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 01:07:38,133 INFO L225 Difference]: With dead ends: 59 [2022-04-05 01:07:38,133 INFO L226 Difference]: Without dead ends: 59 [2022-04-05 01:07:38,134 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2022-04-05 01:07:38,135 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 69 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 01:07:38,136 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 28 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 01:07:38,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-04-05 01:07:38,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2022-04-05 01:07:38,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 49 states have (on average 1.3673469387755102) internal successors, (67), 50 states have internal predecessors, (67), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-05 01:07:38,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 76 transitions. [2022-04-05 01:07:38,156 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 76 transitions. Word has length 24 [2022-04-05 01:07:38,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 01:07:38,156 INFO L478 AbstractCegarLoop]: Abstraction has 58 states and 76 transitions. [2022-04-05 01:07:38,156 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-04-05 01:07:38,156 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 76 transitions. [2022-04-05 01:07:38,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-04-05 01:07:38,157 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 01:07:38,157 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 01:07:38,176 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 01:07:38,371 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 01:07:38,372 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 01:07:38,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 01:07:38,372 INFO L85 PathProgramCache]: Analyzing trace with hash 575066086, now seen corresponding path program 2 times [2022-04-05 01:07:38,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 01:07:38,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103554557] [2022-04-05 01:07:38,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 01:07:38,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 01:07:38,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 01:07:38,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 01:07:38,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 01:07:38,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-05 01:07:38,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 01:07:38,463 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 01:07:38,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 01:07:38,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103554557] [2022-04-05 01:07:38,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103554557] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 01:07:38,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335151911] [2022-04-05 01:07:38,464 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 01:07:38,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 01:07:38,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 01:07:38,465 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 01:07:38,466 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 01:07:38,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 01:07:38,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 01:07:38,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-05 01:07:38,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 01:07:38,576 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-04-05 01:07:38,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 01:07:38,634 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-04-05 01:07:38,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335151911] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 01:07:38,634 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 01:07:38,634 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 12 [2022-04-05 01:07:38,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449302957] [2022-04-05 01:07:38,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 01:07:38,635 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-05 01:07:38,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 01:07:38,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-05 01:07:38,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-04-05 01:07:38,636 INFO L87 Difference]: Start difference. First operand 58 states and 76 transitions. Second operand has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 01:07:38,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 01:07:38,899 INFO L93 Difference]: Finished difference Result 110 states and 144 transitions. [2022-04-05 01:07:38,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-04-05 01:07:38,901 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 33 [2022-04-05 01:07:38,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 01:07:38,902 INFO L225 Difference]: With dead ends: 110 [2022-04-05 01:07:38,902 INFO L226 Difference]: Without dead ends: 110 [2022-04-05 01:07:38,902 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=194, Invalid=562, Unknown=0, NotChecked=0, Total=756 [2022-04-05 01:07:38,902 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 153 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 01:07:38,903 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 41 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 01:07:38,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-04-05 01:07:38,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 98. [2022-04-05 01:07:38,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 87 states have (on average 1.3563218390804597) internal successors, (118), 88 states have internal predecessors, (118), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-05 01:07:38,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 129 transitions. [2022-04-05 01:07:38,907 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 129 transitions. Word has length 33 [2022-04-05 01:07:38,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 01:07:38,908 INFO L478 AbstractCegarLoop]: Abstraction has 98 states and 129 transitions. [2022-04-05 01:07:38,908 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 01:07:38,908 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 129 transitions. [2022-04-05 01:07:38,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-04-05 01:07:38,908 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 01:07:38,909 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 01:07:38,927 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 01:07:39,123 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-04-05 01:07:39,124 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 01:07:39,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 01:07:39,124 INFO L85 PathProgramCache]: Analyzing trace with hash -1861776890, now seen corresponding path program 1 times [2022-04-05 01:07:39,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 01:07:39,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458449093] [2022-04-05 01:07:39,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 01:07:39,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 01:07:39,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 01:07:39,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 01:07:39,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 01:07:39,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-05 01:07:39,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 01:07:39,151 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-04-05 01:07:39,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 01:07:39,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458449093] [2022-04-05 01:07:39,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458449093] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 01:07:39,151 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 01:07:39,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 01:07:39,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199037766] [2022-04-05 01:07:39,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 01:07:39,151 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 01:07:39,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 01:07:39,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 01:07:39,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 01:07:39,152 INFO L87 Difference]: Start difference. First operand 98 states and 129 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-05 01:07:39,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 01:07:39,193 INFO L93 Difference]: Finished difference Result 144 states and 190 transitions. [2022-04-05 01:07:39,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 01:07:39,193 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 39 [2022-04-05 01:07:39,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 01:07:39,194 INFO L225 Difference]: With dead ends: 144 [2022-04-05 01:07:39,194 INFO L226 Difference]: Without dead ends: 144 [2022-04-05 01:07:39,198 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 01:07:39,198 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 12 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 01:07:39,199 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 51 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 01:07:39,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-04-05 01:07:39,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 133. [2022-04-05 01:07:39,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 122 states have (on average 1.3360655737704918) internal successors, (163), 123 states have internal predecessors, (163), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-05 01:07:39,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 174 transitions. [2022-04-05 01:07:39,203 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 174 transitions. Word has length 39 [2022-04-05 01:07:39,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 01:07:39,204 INFO L478 AbstractCegarLoop]: Abstraction has 133 states and 174 transitions. [2022-04-05 01:07:39,204 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-05 01:07:39,204 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 174 transitions. [2022-04-05 01:07:39,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-04-05 01:07:39,204 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 01:07:39,204 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 01:07:39,205 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-04-05 01:07:39,205 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 01:07:39,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 01:07:39,205 INFO L85 PathProgramCache]: Analyzing trace with hash 1666296505, now seen corresponding path program 1 times [2022-04-05 01:07:39,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 01:07:39,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773982475] [2022-04-05 01:07:39,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 01:07:39,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 01:07:39,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 01:07:39,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 01:07:39,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 01:07:39,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-05 01:07:39,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 01:07:39,235 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-04-05 01:07:39,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 01:07:39,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773982475] [2022-04-05 01:07:39,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773982475] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 01:07:39,235 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 01:07:39,235 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 01:07:39,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568027081] [2022-04-05 01:07:39,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 01:07:39,236 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 01:07:39,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 01:07:39,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 01:07:39,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 01:07:39,236 INFO L87 Difference]: Start difference. First operand 133 states and 174 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-05 01:07:39,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 01:07:39,268 INFO L93 Difference]: Finished difference Result 144 states and 188 transitions. [2022-04-05 01:07:39,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 01:07:39,268 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 40 [2022-04-05 01:07:39,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 01:07:39,269 INFO L225 Difference]: With dead ends: 144 [2022-04-05 01:07:39,269 INFO L226 Difference]: Without dead ends: 144 [2022-04-05 01:07:39,269 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 01:07:39,269 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 14 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 01:07:39,269 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 48 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 01:07:39,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-04-05 01:07:39,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 137. [2022-04-05 01:07:39,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 126 states have (on average 1.3253968253968254) internal successors, (167), 127 states have internal predecessors, (167), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-05 01:07:39,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 178 transitions. [2022-04-05 01:07:39,275 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 178 transitions. Word has length 40 [2022-04-05 01:07:39,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 01:07:39,275 INFO L478 AbstractCegarLoop]: Abstraction has 137 states and 178 transitions. [2022-04-05 01:07:39,275 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-05 01:07:39,275 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 178 transitions. [2022-04-05 01:07:39,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-04-05 01:07:39,276 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 01:07:39,276 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 01:07:39,276 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-04-05 01:07:39,276 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 01:07:39,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 01:07:39,277 INFO L85 PathProgramCache]: Analyzing trace with hash 1695849177, now seen corresponding path program 1 times [2022-04-05 01:07:39,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 01:07:39,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722624130] [2022-04-05 01:07:39,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 01:07:39,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 01:07:39,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 01:07:39,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 01:07:39,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 01:07:39,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-05 01:07:39,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 01:07:39,360 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 01:07:39,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 01:07:39,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722624130] [2022-04-05 01:07:39,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722624130] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 01:07:39,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993044662] [2022-04-05 01:07:39,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 01:07:39,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 01:07:39,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 01:07:39,362 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 01:07:39,363 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 01:07:39,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 01:07:39,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-05 01:07:39,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 01:07:39,592 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 01:07:39,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 01:07:39,755 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 01:07:39,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993044662] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 01:07:39,755 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 01:07:39,755 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-04-05 01:07:39,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711957436] [2022-04-05 01:07:39,755 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 01:07:39,756 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-04-05 01:07:39,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 01:07:39,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-04-05 01:07:39,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=389, Unknown=0, NotChecked=0, Total=650 [2022-04-05 01:07:39,757 INFO L87 Difference]: Start difference. First operand 137 states and 178 transitions. Second operand has 26 states, 26 states have (on average 3.1538461538461537) internal successors, (82), 25 states have internal predecessors, (82), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-04-05 01:07:39,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 01:07:39,966 INFO L93 Difference]: Finished difference Result 258 states and 339 transitions. [2022-04-05 01:07:39,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-05 01:07:39,966 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.1538461538461537) internal successors, (82), 25 states have internal predecessors, (82), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 40 [2022-04-05 01:07:39,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 01:07:39,967 INFO L225 Difference]: With dead ends: 258 [2022-04-05 01:07:39,968 INFO L226 Difference]: Without dead ends: 258 [2022-04-05 01:07:39,968 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=399, Invalid=723, Unknown=0, NotChecked=0, Total=1122 [2022-04-05 01:07:39,968 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 147 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 01:07:39,969 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 28 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 01:07:39,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2022-04-05 01:07:39,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 257. [2022-04-05 01:07:39,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 246 states have (on average 1.329268292682927) internal successors, (327), 247 states have internal predecessors, (327), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-05 01:07:39,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 338 transitions. [2022-04-05 01:07:39,975 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 338 transitions. Word has length 40 [2022-04-05 01:07:39,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 01:07:39,975 INFO L478 AbstractCegarLoop]: Abstraction has 257 states and 338 transitions. [2022-04-05 01:07:39,975 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.1538461538461537) internal successors, (82), 25 states have internal predecessors, (82), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-04-05 01:07:39,975 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 338 transitions. [2022-04-05 01:07:39,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-04-05 01:07:39,976 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 01:07:39,976 INFO L499 BasicCegarLoop]: trace histogram [14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 01:07:40,002 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 01:07:40,192 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 01:07:40,193 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 01:07:40,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 01:07:40,193 INFO L85 PathProgramCache]: Analyzing trace with hash 150253017, now seen corresponding path program 2 times [2022-04-05 01:07:40,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 01:07:40,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811149553] [2022-04-05 01:07:40,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 01:07:40,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 01:07:40,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 01:07:40,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 01:07:40,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 01:07:40,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-05 01:07:40,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 01:07:40,388 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 01:07:40,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 01:07:40,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811149553] [2022-04-05 01:07:40,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811149553] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 01:07:40,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183426102] [2022-04-05 01:07:40,389 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 01:07:40,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 01:07:40,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 01:07:40,390 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 01:07:40,427 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 01:07:40,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 01:07:40,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 01:07:40,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-05 01:07:40,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 01:07:40,641 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2022-04-05 01:07:40,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 01:07:40,779 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2022-04-05 01:07:40,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183426102] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 01:07:40,780 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 01:07:40,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 6, 6] total 26 [2022-04-05 01:07:40,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025482865] [2022-04-05 01:07:40,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 01:07:40,780 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-04-05 01:07:40,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 01:07:40,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-04-05 01:07:40,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=456, Unknown=0, NotChecked=0, Total=650 [2022-04-05 01:07:40,781 INFO L87 Difference]: Start difference. First operand 257 states and 338 transitions. Second operand has 26 states, 26 states have (on average 3.1538461538461537) internal successors, (82), 25 states have internal predecessors, (82), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-04-05 01:07:41,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 01:07:41,761 INFO L93 Difference]: Finished difference Result 1062 states and 1392 transitions. [2022-04-05 01:07:41,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-04-05 01:07:41,762 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.1538461538461537) internal successors, (82), 25 states have internal predecessors, (82), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 64 [2022-04-05 01:07:41,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 01:07:41,766 INFO L225 Difference]: With dead ends: 1062 [2022-04-05 01:07:41,766 INFO L226 Difference]: Without dead ends: 1062 [2022-04-05 01:07:41,768 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1699 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1752, Invalid=4568, Unknown=0, NotChecked=0, Total=6320 [2022-04-05 01:07:41,769 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 429 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 430 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-05 01:07:41,769 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [430 Valid, 40 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-05 01:07:41,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1062 states. [2022-04-05 01:07:41,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1062 to 524. [2022-04-05 01:07:41,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 524 states, 507 states have (on average 1.331360946745562) internal successors, (675), 508 states have internal predecessors, (675), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-04-05 01:07:41,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 694 transitions. [2022-04-05 01:07:41,781 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 694 transitions. Word has length 64 [2022-04-05 01:07:41,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 01:07:41,781 INFO L478 AbstractCegarLoop]: Abstraction has 524 states and 694 transitions. [2022-04-05 01:07:41,781 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.1538461538461537) internal successors, (82), 25 states have internal predecessors, (82), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-04-05 01:07:41,781 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 694 transitions. [2022-04-05 01:07:41,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-04-05 01:07:41,782 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 01:07:41,782 INFO L499 BasicCegarLoop]: trace histogram [16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 01:07:41,801 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 01:07:41,998 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 01:07:41,999 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 01:07:41,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 01:07:41,999 INFO L85 PathProgramCache]: Analyzing trace with hash -110856328, now seen corresponding path program 1 times [2022-04-05 01:07:41,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 01:07:41,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79356477] [2022-04-05 01:07:42,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 01:07:42,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 01:07:42,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 01:07:42,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 01:07:42,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 01:07:42,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-05 01:07:42,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 01:07:42,186 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 01:07:42,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 01:07:42,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79356477] [2022-04-05 01:07:42,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79356477] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 01:07:42,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104180274] [2022-04-05 01:07:42,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 01:07:42,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 01:07:42,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 01:07:42,187 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 01:07:42,193 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 01:07:42,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 01:07:42,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 19 conjunts are in the unsatisfiable core [2022-04-05 01:07:42,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 01:07:42,615 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 01:07:42,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 01:07:43,041 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 01:07:43,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104180274] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 01:07:43,042 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 01:07:43,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 56 [2022-04-05 01:07:43,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041510124] [2022-04-05 01:07:43,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 01:07:43,042 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-04-05 01:07:43,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 01:07:43,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-04-05 01:07:43,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1301, Invalid=1779, Unknown=0, NotChecked=0, Total=3080 [2022-04-05 01:07:43,044 INFO L87 Difference]: Start difference. First operand 524 states and 694 transitions. Second operand has 56 states, 56 states have (on average 3.0714285714285716) internal successors, (172), 55 states have internal predecessors, (172), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-04-05 01:07:43,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 01:07:43,557 INFO L93 Difference]: Finished difference Result 3382 states and 4457 transitions. [2022-04-05 01:07:43,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-04-05 01:07:43,557 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 3.0714285714285716) internal successors, (172), 55 states have internal predecessors, (172), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 70 [2022-04-05 01:07:43,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 01:07:43,567 INFO L225 Difference]: With dead ends: 3382 [2022-04-05 01:07:43,568 INFO L226 Difference]: Without dead ends: 3382 [2022-04-05 01:07:43,569 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1832 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1969, Invalid=3433, Unknown=0, NotChecked=0, Total=5402 [2022-04-05 01:07:43,570 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 308 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-05 01:07:43,570 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [309 Valid, 32 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-05 01:07:43,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3382 states. [2022-04-05 01:07:43,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3382 to 1107. [2022-04-05 01:07:43,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1107 states, 1090 states have (on average 1.3293577981651377) internal successors, (1449), 1091 states have internal predecessors, (1449), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-04-05 01:07:43,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1107 states to 1107 states and 1468 transitions. [2022-04-05 01:07:43,592 INFO L78 Accepts]: Start accepts. Automaton has 1107 states and 1468 transitions. Word has length 70 [2022-04-05 01:07:43,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 01:07:43,592 INFO L478 AbstractCegarLoop]: Abstraction has 1107 states and 1468 transitions. [2022-04-05 01:07:43,593 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 3.0714285714285716) internal successors, (172), 55 states have internal predecessors, (172), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-04-05 01:07:43,593 INFO L276 IsEmpty]: Start isEmpty. Operand 1107 states and 1468 transitions. [2022-04-05 01:07:43,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-04-05 01:07:43,594 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 01:07:43,594 INFO L499 BasicCegarLoop]: trace histogram [34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 01:07:43,609 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 01:07:43,809 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-04-05 01:07:43,810 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 01:07:43,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 01:07:43,810 INFO L85 PathProgramCache]: Analyzing trace with hash 1335274040, now seen corresponding path program 2 times [2022-04-05 01:07:43,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 01:07:43,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021339743] [2022-04-05 01:07:43,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 01:07:43,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 01:07:43,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 01:07:44,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 01:07:44,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 01:07:44,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-05 01:07:44,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 01:07:44,358 INFO L134 CoverageAnalysis]: Checked inductivity of 1717 backedges. 0 proven. 1717 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 01:07:44,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 01:07:44,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021339743] [2022-04-05 01:07:44,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021339743] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 01:07:44,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251227962] [2022-04-05 01:07:44,359 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 01:07:44,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 01:07:44,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 01:07:44,359 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 01:07:44,360 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 01:07:44,410 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 01:07:44,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 01:07:44,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 37 conjunts are in the unsatisfiable core [2022-04-05 01:07:44,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 01:07:45,396 INFO L134 CoverageAnalysis]: Checked inductivity of 1717 backedges. 0 proven. 1717 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 01:07:45,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 01:07:46,753 INFO L134 CoverageAnalysis]: Checked inductivity of 1717 backedges. 0 proven. 1717 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 01:07:46,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251227962] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 01:07:46,753 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 01:07:46,753 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 38] total 110 [2022-04-05 01:07:46,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685472828] [2022-04-05 01:07:46,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 01:07:46,754 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2022-04-05 01:07:46,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 01:07:46,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2022-04-05 01:07:46,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5189, Invalid=6801, Unknown=0, NotChecked=0, Total=11990 [2022-04-05 01:07:46,758 INFO L87 Difference]: Start difference. First operand 1107 states and 1468 transitions. Second operand has 110 states, 110 states have (on average 3.036363636363636) internal successors, (334), 109 states have internal predecessors, (334), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-04-05 01:07:48,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 01:07:48,391 INFO L93 Difference]: Finished difference Result 6154 states and 8129 transitions. [2022-04-05 01:07:48,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-04-05 01:07:48,391 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 3.036363636363636) internal successors, (334), 109 states have internal predecessors, (334), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 124 [2022-04-05 01:07:48,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 01:07:48,404 INFO L225 Difference]: With dead ends: 6154 [2022-04-05 01:07:48,405 INFO L226 Difference]: Without dead ends: 6154 [2022-04-05 01:07:48,408 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7556 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=7819, Invalid=13351, Unknown=0, NotChecked=0, Total=21170 [2022-04-05 01:07:48,409 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 561 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 599 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 562 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-05 01:07:48,409 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [562 Valid, 42 Invalid, 732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 599 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-05 01:07:48,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6154 states. [2022-04-05 01:07:48,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6154 to 2295. [2022-04-05 01:07:48,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2295 states, 2278 states have (on average 1.3314310798946445) internal successors, (3033), 2279 states have internal predecessors, (3033), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-04-05 01:07:48,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2295 states to 2295 states and 3052 transitions. [2022-04-05 01:07:48,451 INFO L78 Accepts]: Start accepts. Automaton has 2295 states and 3052 transitions. Word has length 124 [2022-04-05 01:07:48,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 01:07:48,451 INFO L478 AbstractCegarLoop]: Abstraction has 2295 states and 3052 transitions. [2022-04-05 01:07:48,452 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 3.036363636363636) internal successors, (334), 109 states have internal predecessors, (334), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-04-05 01:07:48,452 INFO L276 IsEmpty]: Start isEmpty. Operand 2295 states and 3052 transitions. [2022-04-05 01:07:48,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2022-04-05 01:07:48,453 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 01:07:48,453 INFO L499 BasicCegarLoop]: trace histogram [70, 70, 70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 01:07:48,472 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 01:07:48,667 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 01:07:48,667 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 01:07:48,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 01:07:48,668 INFO L85 PathProgramCache]: Analyzing trace with hash 872046520, now seen corresponding path program 3 times [2022-04-05 01:07:48,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 01:07:48,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631725338] [2022-04-05 01:07:48,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 01:07:48,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 01:07:48,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 01:07:50,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 01:07:50,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 01:07:50,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-05 01:07:50,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 01:07:50,491 INFO L134 CoverageAnalysis]: Checked inductivity of 7315 backedges. 0 proven. 7315 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 01:07:50,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 01:07:50,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631725338] [2022-04-05 01:07:50,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631725338] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 01:07:50,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337805579] [2022-04-05 01:07:50,492 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-05 01:07:50,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 01:07:50,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 01:07:50,493 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 01:07:50,495 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 01:07:50,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-04-05 01:07:50,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 01:07:50,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-05 01:07:50,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 01:07:50,853 INFO L134 CoverageAnalysis]: Checked inductivity of 7315 backedges. 139 proven. 0 refuted. 0 times theorem prover too weak. 7176 trivial. 0 not checked. [2022-04-05 01:07:50,854 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 01:07:50,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337805579] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 01:07:50,854 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-05 01:07:50,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [75] total 79 [2022-04-05 01:07:50,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287334686] [2022-04-05 01:07:50,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 01:07:50,854 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-05 01:07:50,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 01:07:50,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-05 01:07:50,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2642, Invalid=3520, Unknown=0, NotChecked=0, Total=6162 [2022-04-05 01:07:50,856 INFO L87 Difference]: Start difference. First operand 2295 states and 3052 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-05 01:07:50,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 01:07:50,920 INFO L93 Difference]: Finished difference Result 1858 states and 2467 transitions. [2022-04-05 01:07:50,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-05 01:07:50,920 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 232 [2022-04-05 01:07:50,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 01:07:50,924 INFO L225 Difference]: With dead ends: 1858 [2022-04-05 01:07:50,925 INFO L226 Difference]: Without dead ends: 1858 [2022-04-05 01:07:50,926 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 231 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2646, Invalid=3674, Unknown=0, NotChecked=0, Total=6320 [2022-04-05 01:07:50,926 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 26 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 01:07:50,926 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 71 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 01:07:50,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1858 states. [2022-04-05 01:07:50,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1858 to 1857. [2022-04-05 01:07:50,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1857 states, 1843 states have (on average 1.3298969072164948) internal successors, (2451), 1844 states have internal predecessors, (2451), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-05 01:07:50,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1857 states to 1857 states and 2466 transitions. [2022-04-05 01:07:50,947 INFO L78 Accepts]: Start accepts. Automaton has 1857 states and 2466 transitions. Word has length 232 [2022-04-05 01:07:50,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 01:07:50,947 INFO L478 AbstractCegarLoop]: Abstraction has 1857 states and 2466 transitions. [2022-04-05 01:07:50,947 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-05 01:07:50,947 INFO L276 IsEmpty]: Start isEmpty. Operand 1857 states and 2466 transitions. [2022-04-05 01:07:50,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2022-04-05 01:07:50,950 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 01:07:50,951 INFO L499 BasicCegarLoop]: trace histogram [70, 70, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 01:07:50,971 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 01:07:51,163 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 01:07:51,164 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 01:07:51,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 01:07:51,164 INFO L85 PathProgramCache]: Analyzing trace with hash 1465535191, now seen corresponding path program 1 times [2022-04-05 01:07:51,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 01:07:51,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627338810] [2022-04-05 01:07:51,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 01:07:51,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 01:07:51,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 01:07:52,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 01:07:52,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 01:07:52,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-05 01:07:52,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 01:07:52,898 INFO L134 CoverageAnalysis]: Checked inductivity of 7315 backedges. 0 proven. 7315 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 01:07:52,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 01:07:52,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627338810] [2022-04-05 01:07:52,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627338810] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 01:07:52,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862714452] [2022-04-05 01:07:52,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 01:07:52,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 01:07:52,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 01:07:52,899 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 01:07:52,899 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 01:07:52,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 01:07:52,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 516 conjuncts, 73 conjunts are in the unsatisfiable core [2022-04-05 01:07:52,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 01:07:55,595 INFO L134 CoverageAnalysis]: Checked inductivity of 7315 backedges. 0 proven. 7315 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 01:07:55,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 01:08:00,428 INFO L134 CoverageAnalysis]: Checked inductivity of 7315 backedges. 0 proven. 7315 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 01:08:00,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862714452] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 01:08:00,428 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 01:08:00,428 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 74, 74] total 218 [2022-04-05 01:08:00,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899771956] [2022-04-05 01:08:00,429 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 01:08:00,429 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 218 states [2022-04-05 01:08:00,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 01:08:00,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 218 interpolants. [2022-04-05 01:08:00,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20741, Invalid=26565, Unknown=0, NotChecked=0, Total=47306 [2022-04-05 01:08:00,435 INFO L87 Difference]: Start difference. First operand 1857 states and 2466 transitions. Second operand has 218 states, 218 states have (on average 3.018348623853211) internal successors, (658), 217 states have internal predecessors, (658), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-04-05 01:08:06,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 01:08:06,661 INFO L93 Difference]: Finished difference Result 3802 states and 5059 transitions. [2022-04-05 01:08:06,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2022-04-05 01:08:06,661 INFO L78 Accepts]: Start accepts. Automaton has has 218 states, 218 states have (on average 3.018348623853211) internal successors, (658), 217 states have internal predecessors, (658), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 232 [2022-04-05 01:08:06,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 01:08:06,670 INFO L225 Difference]: With dead ends: 3802 [2022-04-05 01:08:06,670 INFO L226 Difference]: Without dead ends: 3802 [2022-04-05 01:08:06,673 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 613 GetRequests, 325 SyntacticMatches, 0 SemanticMatches, 288 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30668 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=31183, Invalid=52627, Unknown=0, NotChecked=0, Total=83810 [2022-04-05 01:08:06,674 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 1738 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 843 mSolverCounterSat, 394 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1739 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 1237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 394 IncrementalHoareTripleChecker+Valid, 843 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-05 01:08:06,674 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1739 Valid, 31 Invalid, 1237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [394 Valid, 843 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-05 01:08:06,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3802 states. [2022-04-05 01:08:06,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3802 to 3801. [2022-04-05 01:08:06,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3801 states, 3787 states have (on average 1.3316609453393187) internal successors, (5043), 3788 states have internal predecessors, (5043), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-05 01:08:06,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3801 states to 3801 states and 5058 transitions. [2022-04-05 01:08:06,712 INFO L78 Accepts]: Start accepts. Automaton has 3801 states and 5058 transitions. Word has length 232 [2022-04-05 01:08:06,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 01:08:06,712 INFO L478 AbstractCegarLoop]: Abstraction has 3801 states and 5058 transitions. [2022-04-05 01:08:06,713 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 218 states, 218 states have (on average 3.018348623853211) internal successors, (658), 217 states have internal predecessors, (658), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-04-05 01:08:06,713 INFO L276 IsEmpty]: Start isEmpty. Operand 3801 states and 5058 transitions. [2022-04-05 01:08:06,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 449 [2022-04-05 01:08:06,717 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 01:08:06,717 INFO L499 BasicCegarLoop]: trace histogram [142, 142, 141, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 01:08:06,735 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 01:08:06,932 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,SelfDestructingSolverStorable13 [2022-04-05 01:08:06,932 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 01:08:06,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 01:08:06,933 INFO L85 PathProgramCache]: Analyzing trace with hash -638197545, now seen corresponding path program 2 times [2022-04-05 01:08:06,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 01:08:06,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531315140] [2022-04-05 01:08:06,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 01:08:06,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 01:08:07,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 01:08:13,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 01:08:13,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 01:08:13,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-05 01:08:13,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 01:08:13,310 INFO L134 CoverageAnalysis]: Checked inductivity of 30175 backedges. 0 proven. 30175 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 01:08:13,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 01:08:13,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531315140] [2022-04-05 01:08:13,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531315140] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 01:08:13,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597069544] [2022-04-05 01:08:13,310 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 01:08:13,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 01:08:13,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 01:08:13,311 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 01:08:13,312 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 01:08:13,431 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 01:08:13,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 01:08:13,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 948 conjuncts, 145 conjunts are in the unsatisfiable core [2022-04-05 01:08:13,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 01:08:21,332 INFO L134 CoverageAnalysis]: Checked inductivity of 30175 backedges. 0 proven. 30175 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 01:08:21,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 01:08:39,744 INFO L134 CoverageAnalysis]: Checked inductivity of 30175 backedges. 0 proven. 30175 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 01:08:39,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597069544] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 01:08:39,744 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 01:08:39,744 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [147, 146, 146] total 434 [2022-04-05 01:08:39,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808137400] [2022-04-05 01:08:39,744 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 01:08:39,746 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 434 states [2022-04-05 01:08:39,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 01:08:39,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 434 interpolants. [2022-04-05 01:08:39,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82949, Invalid=104973, Unknown=0, NotChecked=0, Total=187922 [2022-04-05 01:08:39,766 INFO L87 Difference]: Start difference. First operand 3801 states and 5058 transitions. Second operand has 434 states, 434 states have (on average 3.0092165898617513) internal successors, (1306), 433 states have internal predecessors, (1306), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-04-05 01:09:16,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 01:09:16,719 INFO L93 Difference]: Finished difference Result 7690 states and 10243 transitions. [2022-04-05 01:09:16,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 291 states. [2022-04-05 01:09:16,725 INFO L78 Accepts]: Start accepts. Automaton has has 434 states, 434 states have (on average 3.0092165898617513) internal successors, (1306), 433 states have internal predecessors, (1306), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 448 [2022-04-05 01:09:16,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 01:09:16,741 INFO L225 Difference]: With dead ends: 7690 [2022-04-05 01:09:16,742 INFO L226 Difference]: Without dead ends: 7690 [2022-04-05 01:09:16,757 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1189 GetRequests, 613 SyntacticMatches, 0 SemanticMatches, 576 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123548 ImplicationChecksByTransitivity, 46.4s TimeCoverageRelationStatistics Valid=124567, Invalid=208939, Unknown=0, NotChecked=0, Total=333506 [2022-04-05 01:09:16,758 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 4012 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 1535 mSolverCounterSat, 753 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4013 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 2288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 753 IncrementalHoareTripleChecker+Valid, 1535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-04-05 01:09:16,758 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [4013 Valid, 31 Invalid, 2288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [753 Valid, 1535 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-04-05 01:09:16,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7690 states. [2022-04-05 01:09:16,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7690 to 7689. [2022-04-05 01:09:16,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7689 states, 7675 states have (on average 1.3325081433224755) internal successors, (10227), 7676 states have internal predecessors, (10227), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-05 01:09:16,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7689 states to 7689 states and 10242 transitions. [2022-04-05 01:09:16,844 INFO L78 Accepts]: Start accepts. Automaton has 7689 states and 10242 transitions. Word has length 448 [2022-04-05 01:09:16,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 01:09:16,845 INFO L478 AbstractCegarLoop]: Abstraction has 7689 states and 10242 transitions. [2022-04-05 01:09:16,845 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 434 states, 434 states have (on average 3.0092165898617513) internal successors, (1306), 433 states have internal predecessors, (1306), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-04-05 01:09:16,846 INFO L276 IsEmpty]: Start isEmpty. Operand 7689 states and 10242 transitions. [2022-04-05 01:09:16,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 881 [2022-04-05 01:09:16,859 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 01:09:16,859 INFO L499 BasicCegarLoop]: trace histogram [286, 286, 285, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 01:09:16,881 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 01:09:17,082 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-04-05 01:09:17,082 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 01:09:17,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 01:09:17,083 INFO L85 PathProgramCache]: Analyzing trace with hash 878120151, now seen corresponding path program 3 times [2022-04-05 01:09:17,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 01:09:17,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915335469] [2022-04-05 01:09:17,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 01:09:17,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 01:09:17,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 01:09:42,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 01:09:42,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 01:09:42,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-05 01:09:42,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 01:09:42,056 INFO L134 CoverageAnalysis]: Checked inductivity of 122551 backedges. 0 proven. 122551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 01:09:42,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 01:09:42,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915335469] [2022-04-05 01:09:42,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915335469] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 01:09:42,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54085982] [2022-04-05 01:09:42,056 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-05 01:09:42,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 01:09:42,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 01:09:42,057 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 01:09:42,089 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 01:09:42,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-04-05 01:09:42,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 01:09:42,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-05 01:09:42,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 01:09:45,502 INFO L134 CoverageAnalysis]: Checked inductivity of 122551 backedges. 856 proven. 0 refuted. 0 times theorem prover too weak. 121695 trivial. 0 not checked. [2022-04-05 01:09:45,502 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 01:09:45,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54085982] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 01:09:45,502 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-05 01:09:45,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [291] total 298 [2022-04-05 01:09:45,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890301503] [2022-04-05 01:09:45,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 01:09:45,503 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-05 01:09:45,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 01:09:45,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-05 01:09:45,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41640, Invalid=46866, Unknown=0, NotChecked=0, Total=88506 [2022-04-05 01:09:45,507 INFO L87 Difference]: Start difference. First operand 7689 states and 10242 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-05 01:09:45,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 01:09:45,671 INFO L93 Difference]: Finished difference Result 10245 states and 13643 transitions. [2022-04-05 01:09:45,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-05 01:09:45,672 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 880 [2022-04-05 01:09:45,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 01:09:45,700 INFO L225 Difference]: With dead ends: 10245 [2022-04-05 01:09:45,700 INFO L226 Difference]: Without dead ends: 10245 [2022-04-05 01:09:45,704 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1173 GetRequests, 876 SyntacticMatches, 0 SemanticMatches, 297 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2599 ImplicationChecksByTransitivity, 24.7s TimeCoverageRelationStatistics Valid=41644, Invalid=47458, Unknown=0, NotChecked=0, Total=89102 [2022-04-05 01:09:45,704 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 10 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 01:09:45,704 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 93 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 01:09:45,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10245 states. [2022-04-05 01:09:45,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10245 to 10241. [2022-04-05 01:09:45,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10241 states, 10220 states have (on average 1.3322896281800392) internal successors, (13616), 10224 states have internal predecessors, (13616), 12 states have call successors, (12), 9 states have call predecessors, (12), 8 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2022-04-05 01:09:45,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10241 states to 10241 states and 13639 transitions. [2022-04-05 01:09:45,858 INFO L78 Accepts]: Start accepts. Automaton has 10241 states and 13639 transitions. Word has length 880 [2022-04-05 01:09:45,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 01:09:45,859 INFO L478 AbstractCegarLoop]: Abstraction has 10241 states and 13639 transitions. [2022-04-05 01:09:45,860 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-05 01:09:45,860 INFO L276 IsEmpty]: Start isEmpty. Operand 10241 states and 13639 transitions. [2022-04-05 01:09:45,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 881 [2022-04-05 01:09:45,876 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 01:09:45,876 INFO L499 BasicCegarLoop]: trace histogram [286, 286, 270, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 01:09:45,895 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 01:09:46,094 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,SelfDestructingSolverStorable15 [2022-04-05 01:09:46,094 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 01:09:46,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 01:09:46,095 INFO L85 PathProgramCache]: Analyzing trace with hash -207718695, now seen corresponding path program 1 times [2022-04-05 01:09:46,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 01:09:46,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119078589] [2022-04-05 01:09:46,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 01:09:46,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 01:09:46,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 01:10:10,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 01:10:10,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 01:10:11,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-05 01:10:11,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 01:10:11,010 INFO L134 CoverageAnalysis]: Checked inductivity of 122551 backedges. 0 proven. 122551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 01:10:11,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 01:10:11,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119078589] [2022-04-05 01:10:11,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119078589] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 01:10:11,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364048228] [2022-04-05 01:10:11,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 01:10:11,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 01:10:11,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 01:10:11,024 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 01:10:11,024 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 01:10:11,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 01:10:11,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 1785 conjuncts, 289 conjunts are in the unsatisfiable core [2022-04-05 01:10:11,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 01:10:39,564 INFO L134 CoverageAnalysis]: Checked inductivity of 122551 backedges. 0 proven. 122551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 01:10:39,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 01:11:53,801 INFO L134 CoverageAnalysis]: Checked inductivity of 122551 backedges. 0 proven. 122551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 01:11:53,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364048228] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 01:11:53,801 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 01:11:53,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [291, 290, 290] total 866 [2022-04-05 01:11:53,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940961300] [2022-04-05 01:11:53,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 01:11:53,805 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 866 states [2022-04-05 01:11:53,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 01:11:53,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 866 interpolants. [2022-04-05 01:11:53,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=331781, Invalid=417309, Unknown=0, NotChecked=0, Total=749090 [2022-04-05 01:11:53,879 INFO L87 Difference]: Start difference. First operand 10241 states and 13639 transitions. Second operand has 866 states, 866 states have (on average 3.004618937644342) internal successors, (2602), 865 states have internal predecessors, (2602), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-04-05 01:18:28,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 01:18:28,092 INFO L93 Difference]: Finished difference Result 20609 states and 27463 transitions. [2022-04-05 01:18:28,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 579 states. [2022-04-05 01:18:28,093 INFO L78 Accepts]: Start accepts. Automaton has has 866 states, 866 states have (on average 3.004618937644342) internal successors, (2602), 865 states have internal predecessors, (2602), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 880 [2022-04-05 01:18:28,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 01:18:28,121 INFO L225 Difference]: With dead ends: 20609 [2022-04-05 01:18:28,121 INFO L226 Difference]: Without dead ends: 20609 [2022-04-05 01:18:28,201 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 2341 GetRequests, 1189 SyntacticMatches, 0 SemanticMatches, 1152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495932 ImplicationChecksByTransitivity, 188.9s TimeCoverageRelationStatistics Valid=497959, Invalid=832603, Unknown=0, NotChecked=0, Total=1330562 [2022-04-05 01:18:28,202 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 7064 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 3163 mSolverCounterSat, 892 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7065 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 4055 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 892 IncrementalHoareTripleChecker+Valid, 3163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-04-05 01:18:28,202 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7065 Valid, 44 Invalid, 4055 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [892 Valid, 3163 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-04-05 01:18:28,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20609 states. [2022-04-05 01:18:28,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20609 to 20609. [2022-04-05 01:18:28,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20609 states, 20588 states have (on average 1.332815232174082) internal successors, (27440), 20592 states have internal predecessors, (27440), 12 states have call successors, (12), 9 states have call predecessors, (12), 8 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2022-04-05 01:18:28,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20609 states to 20609 states and 27463 transitions. [2022-04-05 01:18:28,398 INFO L78 Accepts]: Start accepts. Automaton has 20609 states and 27463 transitions. Word has length 880 [2022-04-05 01:18:28,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 01:18:28,399 INFO L478 AbstractCegarLoop]: Abstraction has 20609 states and 27463 transitions. [2022-04-05 01:18:28,400 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 866 states, 866 states have (on average 3.004618937644342) internal successors, (2602), 865 states have internal predecessors, (2602), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-04-05 01:18:28,400 INFO L276 IsEmpty]: Start isEmpty. Operand 20609 states and 27463 transitions. [2022-04-05 01:18:28,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1745 [2022-04-05 01:18:28,420 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 01:18:28,421 INFO L499 BasicCegarLoop]: trace histogram [574, 574, 558, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 01:18:28,440 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 01:18:28,635 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,SelfDestructingSolverStorable16 [2022-04-05 01:18:28,636 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 01:18:28,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 01:18:28,637 INFO L85 PathProgramCache]: Analyzing trace with hash -441769255, now seen corresponding path program 2 times [2022-04-05 01:18:28,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 01:18:28,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666112445] [2022-04-05 01:18:28,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 01:18:28,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 01:18:31,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 01:20:08,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 01:20:08,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 01:20:08,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-05 01:20:08,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 01:20:08,316 INFO L134 CoverageAnalysis]: Checked inductivity of 493927 backedges. 0 proven. 493927 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 01:20:08,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 01:20:08,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666112445] [2022-04-05 01:20:08,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666112445] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 01:20:08,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773098873] [2022-04-05 01:20:08,316 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 01:20:08,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 01:20:08,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 01:20:08,317 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 01:20:08,318 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 01:20:08,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 01:20:08,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 01:20:08,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 3513 conjuncts, 21 conjunts are in the unsatisfiable core [2022-04-05 01:20:08,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 01:20:14,482 INFO L134 CoverageAnalysis]: Checked inductivity of 493927 backedges. 0 proven. 28275 refuted. 0 times theorem prover too weak. 465652 trivial. 0 not checked. [2022-04-05 01:20:14,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 01:20:23,535 INFO L134 CoverageAnalysis]: Checked inductivity of 493927 backedges. 0 proven. 28275 refuted. 0 times theorem prover too weak. 465652 trivial. 0 not checked. [2022-04-05 01:20:23,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773098873] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 01:20:23,535 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 01:20:23,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [579, 22, 22] total 618 [2022-04-05 01:20:23,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999362212] [2022-04-05 01:20:23,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 01:20:23,538 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 618 states [2022-04-05 01:20:23,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 01:20:23,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 618 interpolants. [2022-04-05 01:20:23,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186290, Invalid=195016, Unknown=0, NotChecked=0, Total=381306 [2022-04-05 01:20:23,572 INFO L87 Difference]: Start difference. First operand 20609 states and 27463 transitions. Second operand has 618 states, 618 states have (on average 3.0064724919093853) internal successors, (1858), 617 states have internal predecessors, (1858), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5)