/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf -i ../../../trunk/examples/svcomp/loop-industry-pattern/nested-3.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 08:37:29,650 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 08:37:29,651 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 08:37:29,683 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 08:37:29,696 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-20 08:37:29,697 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-20 08:37:29,698 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-20 08:37:29,700 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-20 08:37:29,700 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-20 08:37:29,701 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-20 08:37:29,702 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-20 08:37:29,706 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-20 08:37:29,707 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-20 08:37:29,708 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-20 08:37:29,708 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-20 08:37:29,709 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-20 08:37:29,710 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-20 08:37:29,714 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-20 08:37:29,719 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 08:37:29,719 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 08:37:29,721 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 08:37:29,721 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-03-20 08:37:29,740 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 08:37:29,740 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 08:37:29,741 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-20 08:37:29,741 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-20 08:37:29,742 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-20 08:37:29,742 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-20 08:37:29,742 INFO L138 SettingsManager]: * Use SBE=true [2022-03-20 08:37:29,742 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 08:37:29,742 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 08:37:29,743 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 08:37:29,743 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 08:37:29,743 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 08:37:29,743 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 08:37:29,743 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 08:37:29,743 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 08:37:29,744 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 08:37:29,744 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 08:37:29,744 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 08:37:29,744 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 08:37:29,744 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 08:37:29,744 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 08:37:29,744 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-20 08:37:29,744 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-20 08:37:29,744 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-20 08:37:29,745 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-20 08:37:29,745 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 08:37:29,745 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-03-20 08:37:29,745 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-03-20 08:37:29,745 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-20 08:37:29,746 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_QVASR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 08:37:29,918 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 08:37:29,938 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 08:37:29,941 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 08:37:29,942 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 08:37:29,942 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 08:37:29,943 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-industry-pattern/nested-3.c [2022-03-20 08:37:29,986 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/464a7739c/d28187b550f94491855c7aad2fb59328/FLAGf640112df [2022-03-20 08:37:30,335 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 08:37:30,335 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-industry-pattern/nested-3.c [2022-03-20 08:37:30,338 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/464a7739c/d28187b550f94491855c7aad2fb59328/FLAGf640112df [2022-03-20 08:37:30,346 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/464a7739c/d28187b550f94491855c7aad2fb59328 [2022-03-20 08:37:30,348 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 08:37:30,348 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-20 08:37:30,350 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 08:37:30,351 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 08:37:30,353 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 08:37:30,354 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 08:37:30" (1/1) ... [2022-03-20 08:37:30,355 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d9db342 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:37:30, skipping insertion in model container [2022-03-20 08:37:30,355 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 08:37:30" (1/1) ... [2022-03-20 08:37:30,359 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 08:37:30,368 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 08:37:30,481 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-industry-pattern/nested-3.c[404,417] [2022-03-20 08:37:30,491 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 08:37:30,498 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 08:37:30,505 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-industry-pattern/nested-3.c[404,417] [2022-03-20 08:37:30,508 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 08:37:30,516 INFO L208 MainTranslator]: Completed translation [2022-03-20 08:37:30,516 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:37:30 WrapperNode [2022-03-20 08:37:30,516 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 08:37:30,518 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 08:37:30,518 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 08:37:30,518 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 08:37:30,525 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:37:30" (1/1) ... [2022-03-20 08:37:30,525 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:37:30" (1/1) ... [2022-03-20 08:37:30,529 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:37:30" (1/1) ... [2022-03-20 08:37:30,529 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:37:30" (1/1) ... [2022-03-20 08:37:30,532 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:37:30" (1/1) ... [2022-03-20 08:37:30,534 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:37:30" (1/1) ... [2022-03-20 08:37:30,534 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:37:30" (1/1) ... [2022-03-20 08:37:30,535 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 08:37:30,536 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 08:37:30,536 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 08:37:30,536 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 08:37:30,539 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:37:30" (1/1) ... [2022-03-20 08:37:30,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 08:37:30,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:37:30,571 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-20 08:37:30,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-20 08:37:30,600 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 08:37:30,600 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 08:37:30,601 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 08:37:30,601 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 08:37:30,602 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 08:37:30,602 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 08:37:30,603 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 08:37:30,603 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 08:37:30,604 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 08:37:30,604 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 08:37:30,604 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 08:37:30,604 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 08:37:30,604 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 08:37:30,604 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 08:37:30,604 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 08:37:30,605 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 08:37:30,607 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 08:37:30,607 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 08:37:30,646 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 08:37:30,647 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 08:37:30,744 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 08:37:30,748 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 08:37:30,748 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-20 08:37:30,749 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 08:37:30 BoogieIcfgContainer [2022-03-20 08:37:30,749 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 08:37:30,750 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-20 08:37:30,750 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-20 08:37:30,751 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-20 08:37:30,753 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 08:37:30" (1/1) ... [2022-03-20 08:37:30,755 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_QVASR [2022-03-20 08:37:30,766 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 08:37:30 BasicIcfg [2022-03-20 08:37:30,766 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-20 08:37:30,767 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 08:37:30,767 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 08:37:30,769 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 08:37:30,769 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 08:37:30" (1/4) ... [2022-03-20 08:37:30,769 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@739f1767 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 08:37:30, skipping insertion in model container [2022-03-20 08:37:30,770 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:37:30" (2/4) ... [2022-03-20 08:37:30,775 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@739f1767 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 08:37:30, skipping insertion in model container [2022-03-20 08:37:30,775 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 08:37:30" (3/4) ... [2022-03-20 08:37:30,775 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@739f1767 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 08:37:30, skipping insertion in model container [2022-03-20 08:37:30,775 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 08:37:30" (4/4) ... [2022-03-20 08:37:30,776 INFO L111 eAbstractionObserver]: Analyzing ICFG nested-3.cqvasr [2022-03-20 08:37:30,791 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-20 08:37:30,791 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 08:37:30,851 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 08:37:30,856 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-20 08:37:30,856 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 08:37:30,880 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 15 states have (on average 1.6) internal successors, (24), 17 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 08:37:30,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-20 08:37:30,884 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:37:30,884 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:37:30,885 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:37:30,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:37:30,890 INFO L85 PathProgramCache]: Analyzing trace with hash -617670298, now seen corresponding path program 1 times [2022-03-20 08:37:30,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:37:30,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229895554] [2022-03-20 08:37:30,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:37:30,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:37:31,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:37:31,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:37:31,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:37:31,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:37:31,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:37:31,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229895554] [2022-03-20 08:37:31,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229895554] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 08:37:31,131 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 08:37:31,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 08:37:31,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660684535] [2022-03-20 08:37:31,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 08:37:31,135 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 08:37:31,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:37:31,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 08:37:31,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 08:37:31,162 INFO L87 Difference]: Start difference. First operand has 23 states, 15 states have (on average 1.6) internal successors, (24), 17 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:37:31,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:37:31,232 INFO L93 Difference]: Finished difference Result 40 states and 61 transitions. [2022-03-20 08:37:31,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 08:37:31,234 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-03-20 08:37:31,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:37:31,237 INFO L225 Difference]: With dead ends: 40 [2022-03-20 08:37:31,238 INFO L226 Difference]: Without dead ends: 23 [2022-03-20 08:37:31,240 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 08:37:31,243 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 8 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 08:37:31,243 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 27 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 08:37:31,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-03-20 08:37:31,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2022-03-20 08:37:31,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 15 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 08:37:31,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2022-03-20 08:37:31,265 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 14 [2022-03-20 08:37:31,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:37:31,265 INFO L478 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2022-03-20 08:37:31,266 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:37:31,266 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2022-03-20 08:37:31,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-20 08:37:31,266 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:37:31,266 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:37:31,267 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 08:37:31,267 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:37:31,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:37:31,268 INFO L85 PathProgramCache]: Analyzing trace with hash -1333032525, now seen corresponding path program 1 times [2022-03-20 08:37:31,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:37:31,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935244438] [2022-03-20 08:37:31,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:37:31,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:37:31,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:37:31,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:37:31,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:37:31,346 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:37:31,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:37:31,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935244438] [2022-03-20 08:37:31,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935244438] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:37:31,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421005680] [2022-03-20 08:37:31,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:37:31,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:37:31,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:37:31,350 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 08:37:31,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 08:37:31,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:37:31,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 2 conjunts are in the unsatisfiable core [2022-03-20 08:37:31,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:37:31,467 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 08:37:31,467 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 08:37:31,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421005680] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 08:37:31,472 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 08:37:31,472 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-03-20 08:37:31,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722844410] [2022-03-20 08:37:31,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 08:37:31,474 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 08:37:31,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:37:31,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 08:37:31,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-03-20 08:37:31,475 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:37:31,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:37:31,506 INFO L93 Difference]: Finished difference Result 37 states and 47 transitions. [2022-03-20 08:37:31,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 08:37:31,511 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-03-20 08:37:31,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:37:31,512 INFO L225 Difference]: With dead ends: 37 [2022-03-20 08:37:31,512 INFO L226 Difference]: Without dead ends: 23 [2022-03-20 08:37:31,513 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-03-20 08:37:31,513 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 1 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 08:37:31,514 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 34 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 08:37:31,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-03-20 08:37:31,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2022-03-20 08:37:31,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 16 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 08:37:31,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2022-03-20 08:37:31,518 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 17 [2022-03-20 08:37:31,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:37:31,519 INFO L478 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2022-03-20 08:37:31,519 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:37:31,520 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2022-03-20 08:37:31,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-20 08:37:31,521 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:37:31,521 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:37:31,538 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-20 08:37:31,728 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:37:31,728 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:37:31,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:37:31,729 INFO L85 PathProgramCache]: Analyzing trace with hash -1332109004, now seen corresponding path program 1 times [2022-03-20 08:37:31,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:37:31,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340140753] [2022-03-20 08:37:31,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:37:31,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:37:31,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:37:31,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:37:31,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:37:31,784 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:37:31,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:37:31,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340140753] [2022-03-20 08:37:31,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340140753] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:37:31,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164166400] [2022-03-20 08:37:31,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:37:31,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:37:31,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:37:31,786 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 08:37:31,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 08:37:31,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:37:31,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 3 conjunts are in the unsatisfiable core [2022-03-20 08:37:31,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:37:31,863 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:37:31,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:37:31,933 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:37:31,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164166400] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:37:31,933 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:37:31,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-03-20 08:37:31,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402200068] [2022-03-20 08:37:31,933 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:37:31,935 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 08:37:31,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:37:31,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 08:37:31,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-03-20 08:37:31,935 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:37:31,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:37:31,983 INFO L93 Difference]: Finished difference Result 46 states and 60 transitions. [2022-03-20 08:37:31,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 08:37:31,984 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-03-20 08:37:31,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:37:31,984 INFO L225 Difference]: With dead ends: 46 [2022-03-20 08:37:31,984 INFO L226 Difference]: Without dead ends: 31 [2022-03-20 08:37:31,985 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-03-20 08:37:31,986 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 25 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 08:37:31,986 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 33 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 08:37:31,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-03-20 08:37:31,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2022-03-20 08:37:31,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 25 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 08:37:31,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2022-03-20 08:37:31,990 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 17 [2022-03-20 08:37:31,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:37:31,990 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2022-03-20 08:37:31,990 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:37:31,990 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2022-03-20 08:37:31,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-20 08:37:31,991 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:37:31,991 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:37:32,010 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-20 08:37:32,199 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,SelfDestructingSolverStorable2 [2022-03-20 08:37:32,199 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:37:32,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:37:32,200 INFO L85 PathProgramCache]: Analyzing trace with hash -771028313, now seen corresponding path program 2 times [2022-03-20 08:37:32,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:37:32,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129413914] [2022-03-20 08:37:32,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:37:32,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:37:32,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:37:32,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:37:32,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:37:32,281 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 08:37:32,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:37:32,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129413914] [2022-03-20 08:37:32,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129413914] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:37:32,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707690509] [2022-03-20 08:37:32,282 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 08:37:32,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:37:32,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:37:32,286 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 08:37:32,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 08:37:32,322 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 08:37:32,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 08:37:32,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 08:37:32,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:37:32,407 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-20 08:37:32,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:37:32,478 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-20 08:37:32,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707690509] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:37:32,479 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:37:32,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 12 [2022-03-20 08:37:32,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027864172] [2022-03-20 08:37:32,479 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:37:32,480 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 08:37:32,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:37:32,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 08:37:32,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-03-20 08:37:32,482 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:37:32,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:37:32,733 INFO L93 Difference]: Finished difference Result 117 states and 149 transitions. [2022-03-20 08:37:32,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-20 08:37:32,733 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-03-20 08:37:32,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:37:32,734 INFO L225 Difference]: With dead ends: 117 [2022-03-20 08:37:32,734 INFO L226 Difference]: Without dead ends: 93 [2022-03-20 08:37:32,734 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2022-03-20 08:37:32,735 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 46 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 08:37:32,735 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 46 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 08:37:32,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-03-20 08:37:32,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 75. [2022-03-20 08:37:32,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 65 states have (on average 1.3076923076923077) internal successors, (85), 66 states have internal predecessors, (85), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-20 08:37:32,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 94 transitions. [2022-03-20 08:37:32,745 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 94 transitions. Word has length 26 [2022-03-20 08:37:32,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:37:32,745 INFO L478 AbstractCegarLoop]: Abstraction has 75 states and 94 transitions. [2022-03-20 08:37:32,745 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:37:32,745 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 94 transitions. [2022-03-20 08:37:32,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-20 08:37:32,746 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:37:32,746 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:37:32,764 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-20 08:37:32,946 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:37:32,946 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:37:32,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:37:32,947 INFO L85 PathProgramCache]: Analyzing trace with hash -1042301816, now seen corresponding path program 1 times [2022-03-20 08:37:32,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:37:32,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095886272] [2022-03-20 08:37:32,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:37:32,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:37:32,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:37:32,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:37:32,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:37:33,001 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 08:37:33,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:37:33,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095886272] [2022-03-20 08:37:33,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095886272] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:37:33,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098987679] [2022-03-20 08:37:33,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:37:33,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:37:33,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:37:33,025 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 08:37:33,026 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-20 08:37:33,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:37:33,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 08:37:33,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:37:33,103 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-20 08:37:33,103 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 08:37:33,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098987679] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 08:37:33,103 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 08:37:33,103 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2022-03-20 08:37:33,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432308022] [2022-03-20 08:37:33,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 08:37:33,104 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 08:37:33,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:37:33,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 08:37:33,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-03-20 08:37:33,105 INFO L87 Difference]: Start difference. First operand 75 states and 94 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:37:33,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:37:33,144 INFO L93 Difference]: Finished difference Result 205 states and 267 transitions. [2022-03-20 08:37:33,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 08:37:33,145 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-03-20 08:37:33,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:37:33,147 INFO L225 Difference]: With dead ends: 205 [2022-03-20 08:37:33,147 INFO L226 Difference]: Without dead ends: 136 [2022-03-20 08:37:33,147 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-03-20 08:37:33,148 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 13 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 08:37:33,148 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 42 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 08:37:33,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-03-20 08:37:33,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 100. [2022-03-20 08:37:33,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 90 states have (on average 1.2777777777777777) internal successors, (115), 91 states have internal predecessors, (115), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-20 08:37:33,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 124 transitions. [2022-03-20 08:37:33,159 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 124 transitions. Word has length 26 [2022-03-20 08:37:33,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:37:33,159 INFO L478 AbstractCegarLoop]: Abstraction has 100 states and 124 transitions. [2022-03-20 08:37:33,159 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:37:33,159 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 124 transitions. [2022-03-20 08:37:33,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-20 08:37:33,160 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:37:33,160 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:37:33,178 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-20 08:37:33,371 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:37:33,371 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:37:33,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:37:33,372 INFO L85 PathProgramCache]: Analyzing trace with hash -913219097, now seen corresponding path program 2 times [2022-03-20 08:37:33,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:37:33,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804090541] [2022-03-20 08:37:33,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:37:33,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:37:33,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:37:33,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:37:33,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:37:33,437 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:37:33,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:37:33,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804090541] [2022-03-20 08:37:33,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804090541] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:37:33,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885374404] [2022-03-20 08:37:33,438 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 08:37:33,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:37:33,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:37:33,439 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 08:37:33,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-20 08:37:33,467 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 08:37:33,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 08:37:33,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 08:37:33,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:37:33,516 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:37:33,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:37:33,584 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:37:33,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885374404] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:37:33,584 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:37:33,584 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2022-03-20 08:37:33,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248524950] [2022-03-20 08:37:33,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:37:33,585 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 08:37:33,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:37:33,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 08:37:33,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2022-03-20 08:37:33,586 INFO L87 Difference]: Start difference. First operand 100 states and 124 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:37:33,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:37:33,656 INFO L93 Difference]: Finished difference Result 329 states and 437 transitions. [2022-03-20 08:37:33,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 08:37:33,656 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-03-20 08:37:33,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:37:33,659 INFO L225 Difference]: With dead ends: 329 [2022-03-20 08:37:33,659 INFO L226 Difference]: Without dead ends: 235 [2022-03-20 08:37:33,660 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2022-03-20 08:37:33,662 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 53 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 08:37:33,662 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 39 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 08:37:33,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2022-03-20 08:37:33,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 208. [2022-03-20 08:37:33,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 198 states have (on average 1.2171717171717171) internal successors, (241), 199 states have internal predecessors, (241), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-20 08:37:33,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 250 transitions. [2022-03-20 08:37:33,691 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 250 transitions. Word has length 26 [2022-03-20 08:37:33,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:37:33,691 INFO L478 AbstractCegarLoop]: Abstraction has 208 states and 250 transitions. [2022-03-20 08:37:33,695 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:37:33,695 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 250 transitions. [2022-03-20 08:37:33,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-20 08:37:33,701 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:37:33,701 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:37:33,722 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-20 08:37:33,923 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:37:33,925 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:37:33,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:37:33,925 INFO L85 PathProgramCache]: Analyzing trace with hash 1702419303, now seen corresponding path program 3 times [2022-03-20 08:37:33,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:37:33,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088669592] [2022-03-20 08:37:33,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:37:33,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:37:33,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:37:34,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:37:34,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:37:34,021 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:37:34,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:37:34,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088669592] [2022-03-20 08:37:34,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088669592] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:37:34,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085872788] [2022-03-20 08:37:34,022 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 08:37:34,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:37:34,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:37:34,032 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 08:37:34,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-20 08:37:34,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-20 08:37:34,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 08:37:34,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-20 08:37:34,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:37:34,330 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2022-03-20 08:37:34,330 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 08:37:34,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085872788] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 08:37:34,331 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 08:37:34,331 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [14] total 21 [2022-03-20 08:37:34,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984709997] [2022-03-20 08:37:34,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 08:37:34,331 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 08:37:34,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:37:34,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 08:37:34,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2022-03-20 08:37:34,332 INFO L87 Difference]: Start difference. First operand 208 states and 250 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:37:34,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:37:34,388 INFO L93 Difference]: Finished difference Result 349 states and 411 transitions. [2022-03-20 08:37:34,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 08:37:34,388 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-03-20 08:37:34,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:37:34,390 INFO L225 Difference]: With dead ends: 349 [2022-03-20 08:37:34,390 INFO L226 Difference]: Without dead ends: 347 [2022-03-20 08:37:34,390 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2022-03-20 08:37:34,391 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 11 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 08:37:34,392 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 74 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 08:37:34,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2022-03-20 08:37:34,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 344. [2022-03-20 08:37:34,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 328 states have (on average 1.1859756097560976) internal successors, (389), 331 states have internal predecessors, (389), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 4 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-20 08:37:34,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 404 transitions. [2022-03-20 08:37:34,419 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 404 transitions. Word has length 44 [2022-03-20 08:37:34,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:37:34,420 INFO L478 AbstractCegarLoop]: Abstraction has 344 states and 404 transitions. [2022-03-20 08:37:34,420 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:37:34,420 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 404 transitions. [2022-03-20 08:37:34,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-20 08:37:34,421 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:37:34,422 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:37:34,444 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-20 08:37:34,632 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:37:34,632 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:37:34,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:37:34,633 INFO L85 PathProgramCache]: Analyzing trace with hash 1136577574, now seen corresponding path program 1 times [2022-03-20 08:37:34,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:37:34,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359285870] [2022-03-20 08:37:34,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:37:34,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:37:34,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:37:34,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:37:34,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:37:34,730 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:37:34,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:37:34,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359285870] [2022-03-20 08:37:34,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359285870] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:37:34,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884857492] [2022-03-20 08:37:34,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:37:34,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:37:34,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:37:34,732 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 08:37:34,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-20 08:37:34,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:37:34,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-20 08:37:34,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:37:34,840 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:37:34,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:37:35,047 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:37:35,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884857492] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:37:35,048 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:37:35,048 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 26 [2022-03-20 08:37:35,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813949159] [2022-03-20 08:37:35,048 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:37:35,048 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-20 08:37:35,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:37:35,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-20 08:37:35,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2022-03-20 08:37:35,049 INFO L87 Difference]: Start difference. First operand 344 states and 404 transitions. Second operand has 26 states, 26 states have (on average 2.9615384615384617) internal successors, (77), 25 states have internal predecessors, (77), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:37:35,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:37:35,176 INFO L93 Difference]: Finished difference Result 1004 states and 1301 transitions. [2022-03-20 08:37:35,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-20 08:37:35,177 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.9615384615384617) internal successors, (77), 25 states have internal predecessors, (77), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-03-20 08:37:35,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:37:35,181 INFO L225 Difference]: With dead ends: 1004 [2022-03-20 08:37:35,181 INFO L226 Difference]: Without dead ends: 778 [2022-03-20 08:37:35,183 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2022-03-20 08:37:35,183 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 136 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 08:37:35,183 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 39 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 08:37:35,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 778 states. [2022-03-20 08:37:35,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 778 to 704. [2022-03-20 08:37:35,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 704 states, 688 states have (on average 1.1584302325581395) internal successors, (797), 691 states have internal predecessors, (797), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 4 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-20 08:37:35,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 704 states to 704 states and 812 transitions. [2022-03-20 08:37:35,226 INFO L78 Accepts]: Start accepts. Automaton has 704 states and 812 transitions. Word has length 44 [2022-03-20 08:37:35,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:37:35,226 INFO L478 AbstractCegarLoop]: Abstraction has 704 states and 812 transitions. [2022-03-20 08:37:35,226 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.9615384615384617) internal successors, (77), 25 states have internal predecessors, (77), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:37:35,226 INFO L276 IsEmpty]: Start isEmpty. Operand 704 states and 812 transitions. [2022-03-20 08:37:35,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-03-20 08:37:35,227 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:37:35,227 INFO L499 BasicCegarLoop]: trace histogram [22, 22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:37:35,247 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-20 08:37:35,447 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:37:35,447 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:37:35,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:37:35,448 INFO L85 PathProgramCache]: Analyzing trace with hash -627106906, now seen corresponding path program 2 times [2022-03-20 08:37:35,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:37:35,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446085695] [2022-03-20 08:37:35,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:37:35,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:37:35,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:37:35,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:37:35,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:37:35,735 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:37:35,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:37:35,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446085695] [2022-03-20 08:37:35,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446085695] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:37:35,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792591360] [2022-03-20 08:37:35,736 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 08:37:35,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:37:35,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:37:35,737 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 08:37:35,738 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-20 08:37:35,773 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 08:37:35,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 08:37:35,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-20 08:37:35,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:37:35,917 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:37:35,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:37:36,611 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:37:36,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792591360] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:37:36,611 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:37:36,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 53 [2022-03-20 08:37:36,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261880960] [2022-03-20 08:37:36,612 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:37:36,612 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-03-20 08:37:36,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:37:36,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-03-20 08:37:36,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1142, Invalid=1614, Unknown=0, NotChecked=0, Total=2756 [2022-03-20 08:37:36,614 INFO L87 Difference]: Start difference. First operand 704 states and 812 transitions. Second operand has 53 states, 53 states have (on average 2.9056603773584904) internal successors, (154), 52 states have internal predecessors, (154), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:37:38,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:37:38,899 INFO L93 Difference]: Finished difference Result 2412 states and 3167 transitions. [2022-03-20 08:37:38,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2022-03-20 08:37:38,900 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.9056603773584904) internal successors, (154), 52 states have internal predecessors, (154), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 80 [2022-03-20 08:37:38,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:37:38,906 INFO L225 Difference]: With dead ends: 2412 [2022-03-20 08:37:38,906 INFO L226 Difference]: Without dead ends: 1970 [2022-03-20 08:37:38,914 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5148 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=6559, Invalid=14611, Unknown=0, NotChecked=0, Total=21170 [2022-03-20 08:37:38,916 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 601 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 602 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 08:37:38,916 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [602 Valid, 67 Invalid, 619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 445 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 08:37:38,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1970 states. [2022-03-20 08:37:38,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1970 to 1020. [2022-03-20 08:37:38,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1020 states, 1004 states have (on average 1.202191235059761) internal successors, (1207), 1007 states have internal predecessors, (1207), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 4 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-20 08:37:38,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1020 states to 1020 states and 1222 transitions. [2022-03-20 08:37:38,979 INFO L78 Accepts]: Start accepts. Automaton has 1020 states and 1222 transitions. Word has length 80 [2022-03-20 08:37:38,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:37:38,979 INFO L478 AbstractCegarLoop]: Abstraction has 1020 states and 1222 transitions. [2022-03-20 08:37:38,979 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.9056603773584904) internal successors, (154), 52 states have internal predecessors, (154), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:37:38,979 INFO L276 IsEmpty]: Start isEmpty. Operand 1020 states and 1222 transitions. [2022-03-20 08:37:38,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-03-20 08:37:38,980 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:37:38,980 INFO L499 BasicCegarLoop]: trace histogram [45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:37:38,997 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-03-20 08:37:39,194 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,SelfDestructingSolverStorable8 [2022-03-20 08:37:39,194 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:37:39,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:37:39,195 INFO L85 PathProgramCache]: Analyzing trace with hash 238951605, now seen corresponding path program 1 times [2022-03-20 08:37:39,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:37:39,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443246284] [2022-03-20 08:37:39,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:37:39,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:37:39,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:37:39,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:37:39,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:37:39,268 INFO L134 CoverageAnalysis]: Checked inductivity of 3015 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3015 trivial. 0 not checked. [2022-03-20 08:37:39,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:37:39,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443246284] [2022-03-20 08:37:39,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443246284] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 08:37:39,269 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 08:37:39,269 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 08:37:39,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950991504] [2022-03-20 08:37:39,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 08:37:39,269 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 08:37:39,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:37:39,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 08:37:39,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 08:37:39,270 INFO L87 Difference]: Start difference. First operand 1020 states and 1222 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:37:39,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:37:39,314 INFO L93 Difference]: Finished difference Result 1676 states and 2030 transitions. [2022-03-20 08:37:39,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 08:37:39,315 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 149 [2022-03-20 08:37:39,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:37:39,318 INFO L225 Difference]: With dead ends: 1676 [2022-03-20 08:37:39,318 INFO L226 Difference]: Without dead ends: 1031 [2022-03-20 08:37:39,319 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 08:37:39,320 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 7 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 08:37:39,321 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 40 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 08:37:39,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1031 states. [2022-03-20 08:37:39,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1031 to 1016. [2022-03-20 08:37:39,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1016 states, 1000 states have (on average 1.199) internal successors, (1199), 1003 states have internal predecessors, (1199), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 4 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-20 08:37:39,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1016 states to 1016 states and 1214 transitions. [2022-03-20 08:37:39,355 INFO L78 Accepts]: Start accepts. Automaton has 1016 states and 1214 transitions. Word has length 149 [2022-03-20 08:37:39,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:37:39,356 INFO L478 AbstractCegarLoop]: Abstraction has 1016 states and 1214 transitions. [2022-03-20 08:37:39,356 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:37:39,356 INFO L276 IsEmpty]: Start isEmpty. Operand 1016 states and 1214 transitions. [2022-03-20 08:37:39,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-03-20 08:37:39,357 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:37:39,357 INFO L499 BasicCegarLoop]: trace histogram [46, 46, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:37:39,357 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-03-20 08:37:39,358 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:37:39,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:37:39,358 INFO L85 PathProgramCache]: Analyzing trace with hash 147487398, now seen corresponding path program 3 times [2022-03-20 08:37:39,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:37:39,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153445354] [2022-03-20 08:37:39,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:37:39,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:37:39,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:37:40,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:37:40,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:37:40,170 INFO L134 CoverageAnalysis]: Checked inductivity of 3151 backedges. 0 proven. 3151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:37:40,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:37:40,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153445354] [2022-03-20 08:37:40,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153445354] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:37:40,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123990064] [2022-03-20 08:37:40,171 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 08:37:40,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:37:40,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:37:40,172 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 08:37:40,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-20 08:37:40,207 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-20 08:37:40,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 08:37:40,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-20 08:37:40,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:37:40,848 INFO L134 CoverageAnalysis]: Checked inductivity of 3151 backedges. 136 proven. 0 refuted. 0 times theorem prover too weak. 3015 trivial. 0 not checked. [2022-03-20 08:37:40,848 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 08:37:40,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123990064] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 08:37:40,849 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 08:37:40,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [50] total 57 [2022-03-20 08:37:40,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730130079] [2022-03-20 08:37:40,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 08:37:40,849 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 08:37:40,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:37:40,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 08:37:40,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1197, Invalid=1995, Unknown=0, NotChecked=0, Total=3192 [2022-03-20 08:37:40,851 INFO L87 Difference]: Start difference. First operand 1016 states and 1214 transitions. Second operand has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 8 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:37:40,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:37:40,921 INFO L93 Difference]: Finished difference Result 1025 states and 1223 transitions. [2022-03-20 08:37:40,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 08:37:40,921 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 8 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 152 [2022-03-20 08:37:40,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:37:40,924 INFO L225 Difference]: With dead ends: 1025 [2022-03-20 08:37:40,925 INFO L226 Difference]: Without dead ends: 1023 [2022-03-20 08:37:40,926 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1201, Invalid=2105, Unknown=0, NotChecked=0, Total=3306 [2022-03-20 08:37:40,926 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 13 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 08:37:40,926 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 82 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 08:37:40,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1023 states. [2022-03-20 08:37:40,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1023 to 1016. [2022-03-20 08:37:40,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1016 states, 1000 states have (on average 1.199) internal successors, (1199), 1003 states have internal predecessors, (1199), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 4 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-20 08:37:40,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1016 states to 1016 states and 1214 transitions. [2022-03-20 08:37:40,959 INFO L78 Accepts]: Start accepts. Automaton has 1016 states and 1214 transitions. Word has length 152 [2022-03-20 08:37:40,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:37:40,959 INFO L478 AbstractCegarLoop]: Abstraction has 1016 states and 1214 transitions. [2022-03-20 08:37:40,959 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 8 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:37:40,959 INFO L276 IsEmpty]: Start isEmpty. Operand 1016 states and 1214 transitions. [2022-03-20 08:37:40,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2022-03-20 08:37:40,962 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:37:40,962 INFO L499 BasicCegarLoop]: trace histogram [90, 90, 88, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:37:40,991 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-20 08:37:41,175 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:37:41,175 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:37:41,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:37:41,176 INFO L85 PathProgramCache]: Analyzing trace with hash 2003780641, now seen corresponding path program 1 times [2022-03-20 08:37:41,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:37:41,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023903494] [2022-03-20 08:37:41,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:37:41,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:37:41,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:37:41,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:37:41,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:37:41,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2022-03-20 08:37:41,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:37:41,930 INFO L134 CoverageAnalysis]: Checked inductivity of 12202 backedges. 6169 proven. 3015 refuted. 0 times theorem prover too weak. 3018 trivial. 0 not checked. [2022-03-20 08:37:41,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:37:41,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023903494] [2022-03-20 08:37:41,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023903494] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:37:41,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300029231] [2022-03-20 08:37:41,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:37:41,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:37:41,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:37:41,932 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 08:37:41,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-20 08:37:42,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:37:42,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-20 08:37:42,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:37:42,394 INFO L134 CoverageAnalysis]: Checked inductivity of 12202 backedges. 6167 proven. 3015 refuted. 0 times theorem prover too weak. 3020 trivial. 0 not checked. [2022-03-20 08:37:42,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:37:44,590 INFO L134 CoverageAnalysis]: Checked inductivity of 12202 backedges. 6169 proven. 3015 refuted. 0 times theorem prover too weak. 3018 trivial. 0 not checked. [2022-03-20 08:37:44,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300029231] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:37:44,590 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:37:44,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48, 48] total 96 [2022-03-20 08:37:44,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519993297] [2022-03-20 08:37:44,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:37:44,591 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-03-20 08:37:44,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:37:44,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-03-20 08:37:44,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4467, Invalid=4653, Unknown=0, NotChecked=0, Total=9120 [2022-03-20 08:37:44,594 INFO L87 Difference]: Start difference. First operand 1016 states and 1214 transitions. Second operand has 96 states, 96 states have (on average 3.1041666666666665) internal successors, (298), 95 states have internal predecessors, (298), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 08:37:45,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:37:45,295 INFO L93 Difference]: Finished difference Result 7262 states and 8351 transitions. [2022-03-20 08:37:45,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-03-20 08:37:45,296 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 3.1041666666666665) internal successors, (298), 95 states have internal predecessors, (298), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 293 [2022-03-20 08:37:45,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:37:45,310 INFO L225 Difference]: With dead ends: 7262 [2022-03-20 08:37:45,310 INFO L226 Difference]: Without dead ends: 6597 [2022-03-20 08:37:45,316 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 637 GetRequests, 543 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=4467, Invalid=4653, Unknown=0, NotChecked=0, Total=9120 [2022-03-20 08:37:45,316 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 807 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 421 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 807 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 08:37:45,316 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [807 Valid, 44 Invalid, 487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 421 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 08:37:45,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6597 states. [2022-03-20 08:37:45,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6597 to 2416. [2022-03-20 08:37:45,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2416 states, 2400 states have (on average 1.1604166666666667) internal successors, (2785), 2403 states have internal predecessors, (2785), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 4 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-20 08:37:45,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2416 states to 2416 states and 2800 transitions. [2022-03-20 08:37:45,440 INFO L78 Accepts]: Start accepts. Automaton has 2416 states and 2800 transitions. Word has length 293 [2022-03-20 08:37:45,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:37:45,440 INFO L478 AbstractCegarLoop]: Abstraction has 2416 states and 2800 transitions. [2022-03-20 08:37:45,441 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 3.1041666666666665) internal successors, (298), 95 states have internal predecessors, (298), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 08:37:45,441 INFO L276 IsEmpty]: Start isEmpty. Operand 2416 states and 2800 transitions. [2022-03-20 08:37:45,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 576 [2022-03-20 08:37:45,449 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:37:45,449 INFO L499 BasicCegarLoop]: trace histogram [184, 184, 182, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:37:45,468 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-20 08:37:45,663 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-03-20 08:37:45,663 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:37:45,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:37:45,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1845473477, now seen corresponding path program 2 times [2022-03-20 08:37:45,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:37:45,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20129794] [2022-03-20 08:37:45,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:37:45,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:37:45,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:37:48,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:37:48,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:37:48,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 286 [2022-03-20 08:37:48,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:37:48,367 INFO L134 CoverageAnalysis]: Checked inductivity of 50883 backedges. 25580 proven. 12650 refuted. 0 times theorem prover too weak. 12653 trivial. 0 not checked. [2022-03-20 08:37:48,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:37:48,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20129794] [2022-03-20 08:37:48,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20129794] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:37:48,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495272866] [2022-03-20 08:37:48,368 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 08:37:48,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:37:48,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:37:48,369 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 08:37:48,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-20 08:37:48,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 08:37:48,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 08:37:48,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 841 conjuncts, 94 conjunts are in the unsatisfiable core [2022-03-20 08:37:48,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:37:49,249 INFO L134 CoverageAnalysis]: Checked inductivity of 50883 backedges. 25578 proven. 12650 refuted. 0 times theorem prover too weak. 12655 trivial. 0 not checked. [2022-03-20 08:37:49,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:37:57,043 INFO L134 CoverageAnalysis]: Checked inductivity of 50883 backedges. 25580 proven. 12650 refuted. 0 times theorem prover too weak. 12653 trivial. 0 not checked. [2022-03-20 08:37:57,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495272866] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:37:57,043 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:37:57,043 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 95, 95] total 190 [2022-03-20 08:37:57,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340498850] [2022-03-20 08:37:57,043 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:37:57,046 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 190 states [2022-03-20 08:37:57,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:37:57,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 190 interpolants. [2022-03-20 08:37:57,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17768, Invalid=18142, Unknown=0, NotChecked=0, Total=35910 [2022-03-20 08:37:57,054 INFO L87 Difference]: Start difference. First operand 2416 states and 2800 transitions. Second operand has 190 states, 190 states have (on average 3.0526315789473686) internal successors, (580), 189 states have internal predecessors, (580), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 08:38:01,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:38:01,481 INFO L93 Difference]: Finished difference Result 14315 states and 16490 transitions. [2022-03-20 08:38:01,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 189 states. [2022-03-20 08:38:01,482 INFO L78 Accepts]: Start accepts. Automaton has has 190 states, 190 states have (on average 3.0526315789473686) internal successors, (580), 189 states have internal predecessors, (580), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 575 [2022-03-20 08:38:01,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:38:01,515 INFO L225 Difference]: With dead ends: 14315 [2022-03-20 08:38:01,515 INFO L226 Difference]: Without dead ends: 12809 [2022-03-20 08:38:01,522 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1248 GetRequests, 1060 SyntacticMatches, 0 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=17768, Invalid=18142, Unknown=0, NotChecked=0, Total=35910 [2022-03-20 08:38:01,522 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 1351 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 851 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1351 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 959 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 851 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 08:38:01,522 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1351 Valid, 74 Invalid, 959 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 851 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 08:38:01,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12809 states. [2022-03-20 08:38:01,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12809 to 5236. [2022-03-20 08:38:01,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5236 states, 5220 states have (on average 1.1457854406130268) internal successors, (5981), 5223 states have internal predecessors, (5981), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 4 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-20 08:38:01,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5236 states to 5236 states and 5996 transitions. [2022-03-20 08:38:01,983 INFO L78 Accepts]: Start accepts. Automaton has 5236 states and 5996 transitions. Word has length 575 [2022-03-20 08:38:01,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:38:01,984 INFO L478 AbstractCegarLoop]: Abstraction has 5236 states and 5996 transitions. [2022-03-20 08:38:01,984 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 190 states, 190 states have (on average 3.0526315789473686) internal successors, (580), 189 states have internal predecessors, (580), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 08:38:01,984 INFO L276 IsEmpty]: Start isEmpty. Operand 5236 states and 5996 transitions. [2022-03-20 08:38:02,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1140 [2022-03-20 08:38:02,008 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:38:02,008 INFO L499 BasicCegarLoop]: trace histogram [372, 372, 370, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:38:02,028 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-20 08:38:02,219 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-20 08:38:02,219 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:38:02,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:38:02,220 INFO L85 PathProgramCache]: Analyzing trace with hash 2142701381, now seen corresponding path program 3 times [2022-03-20 08:38:02,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:38:02,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674278064] [2022-03-20 08:38:02,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:38:02,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:38:02,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:38:12,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:38:12,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:38:12,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 568 [2022-03-20 08:38:12,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:38:12,457 INFO L134 CoverageAnalysis]: Checked inductivity of 207769 backedges. 104164 proven. 51801 refuted. 0 times theorem prover too weak. 51804 trivial. 0 not checked. [2022-03-20 08:38:12,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:38:12,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674278064] [2022-03-20 08:38:12,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674278064] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:38:12,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187074689] [2022-03-20 08:38:12,459 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 08:38:12,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:38:12,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:38:12,464 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 08:38:12,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-20 08:38:12,553 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-20 08:38:12,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 08:38:12,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-20 08:38:12,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:38:16,513 INFO L134 CoverageAnalysis]: Checked inductivity of 207769 backedges. 558 proven. 104165 refuted. 0 times theorem prover too weak. 103046 trivial. 0 not checked. [2022-03-20 08:38:16,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:38:18,689 INFO L134 CoverageAnalysis]: Checked inductivity of 207769 backedges. 5 proven. 1115 refuted. 0 times theorem prover too weak. 206649 trivial. 0 not checked. [2022-03-20 08:38:18,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187074689] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:38:18,690 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:38:18,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [190, 10, 8] total 202 [2022-03-20 08:38:18,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793531173] [2022-03-20 08:38:18,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:38:18,691 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 202 states [2022-03-20 08:38:18,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:38:18,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 202 interpolants. [2022-03-20 08:38:18,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18187, Invalid=22415, Unknown=0, NotChecked=0, Total=40602 [2022-03-20 08:38:18,699 INFO L87 Difference]: Start difference. First operand 5236 states and 5996 transitions. Second operand has 202 states, 202 states have (on average 3.0445544554455446) internal successors, (615), 200 states have internal predecessors, (615), 6 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-20 08:39:22,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:39:22,976 INFO L93 Difference]: Finished difference Result 13589 states and 15541 transitions. [2022-03-20 08:39:22,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 576 states. [2022-03-20 08:39:22,977 INFO L78 Accepts]: Start accepts. Automaton has has 202 states, 202 states have (on average 3.0445544554455446) internal successors, (615), 200 states have internal predecessors, (615), 6 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 1139 [2022-03-20 08:39:22,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:39:22,977 INFO L225 Difference]: With dead ends: 13589 [2022-03-20 08:39:22,977 INFO L226 Difference]: Without dead ends: 0 [2022-03-20 08:39:23,019 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 3039 GetRequests, 2268 SyntacticMatches, 3 SemanticMatches, 768 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165203 ImplicationChecksByTransitivity, 57.3s TimeCoverageRelationStatistics Valid=163348, Invalid=428782, Unknown=0, NotChecked=0, Total=592130 [2022-03-20 08:39:23,020 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 4937 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 1732 mSolverCounterSat, 783 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4940 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 2515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 783 IncrementalHoareTripleChecker+Valid, 1732 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-20 08:39:23,020 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [4940 Valid, 86 Invalid, 2515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [783 Valid, 1732 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-03-20 08:39:23,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-20 08:39:23,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-20 08:39:23,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-20 08:39:23,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-20 08:39:23,021 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 1139 [2022-03-20 08:39:23,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:39:23,021 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-20 08:39:23,021 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 202 states, 202 states have (on average 3.0445544554455446) internal successors, (615), 200 states have internal predecessors, (615), 6 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-20 08:39:23,021 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-20 08:39:23,021 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-20 08:39:23,023 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-20 08:39:23,049 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-20 08:39:23,239 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-20 08:39:23,241 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.