/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-new/count_by_k.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7390193 [2022-04-05 05:30:19,625 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-05 05:30:19,627 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-05 05:30:19,681 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-05 05:30:19,699 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-05 05:30:19,700 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-05 05:30:19,700 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-05 05:30:19,701 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-05 05:30:19,702 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-05 05:30:19,704 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-05 05:30:19,706 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-05 05:30:19,711 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-05 05:30:19,712 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-05 05:30:19,714 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-05 05:30:19,715 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-05 05:30:19,717 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-05 05:30:19,718 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-05 05:30:19,721 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-05 05:30:19,728 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-05 05:30:19,729 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-05 05:30:19,730 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-05 05:30:19,731 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-04-05 05:30:19,756 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-05 05:30:19,756 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-05 05:30:19,757 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-04-05 05:30:19,757 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-04-05 05:30:19,758 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-04-05 05:30:19,758 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-04-05 05:30:19,758 INFO L138 SettingsManager]: * Use SBE=true [2022-04-05 05:30:19,758 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-05 05:30:19,758 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-05 05:30:19,759 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-05 05:30:19,759 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-05 05:30:19,759 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-05 05:30:19,759 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-05 05:30:19,759 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-05 05:30:19,760 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-05 05:30:19,760 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-05 05:30:19,760 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-05 05:30:19,760 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-05 05:30:19,760 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-05 05:30:19,760 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 05:30:19,760 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-05 05:30:19,760 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-04-05 05:30:19,761 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-04-05 05:30:19,761 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-05 05:30:19,761 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-04-05 05:30:19,761 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-05 05:30:19,761 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-04-05 05:30:19,761 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-04-05 05:30:19,762 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-04-05 05:30:19,763 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_QVASR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-05 05:30:20,017 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-05 05:30:20,037 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-05 05:30:20,039 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-05 05:30:20,040 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-05 05:30:20,041 INFO L275 PluginConnector]: CDTParser initialized [2022-04-05 05:30:20,042 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/count_by_k.i [2022-04-05 05:30:20,085 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a10e93b9/cfc95bd7d70b4d94b636c4cb54d9e1db/FLAGf6c4a8015 [2022-04-05 05:30:20,460 INFO L306 CDTParser]: Found 1 translation units. [2022-04-05 05:30:20,461 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/count_by_k.i [2022-04-05 05:30:20,466 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a10e93b9/cfc95bd7d70b4d94b636c4cb54d9e1db/FLAGf6c4a8015 [2022-04-05 05:30:20,883 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a10e93b9/cfc95bd7d70b4d94b636c4cb54d9e1db [2022-04-05 05:30:20,886 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-05 05:30:20,888 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-04-05 05:30:20,889 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-05 05:30:20,889 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-05 05:30:20,893 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-05 05:30:20,893 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 05:30:20" (1/1) ... [2022-04-05 05:30:20,894 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63549dd9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 05:30:20, skipping insertion in model container [2022-04-05 05:30:20,895 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 05:30:20" (1/1) ... [2022-04-05 05:30:20,900 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-05 05:30:20,912 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-05 05:30:21,087 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-new/count_by_k.i[891,904] [2022-04-05 05:30:21,102 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 05:30:21,109 INFO L203 MainTranslator]: Completed pre-run [2022-04-05 05:30:21,155 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-new/count_by_k.i[891,904] [2022-04-05 05:30:21,161 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 05:30:21,176 INFO L208 MainTranslator]: Completed translation [2022-04-05 05:30:21,176 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 05:30:21 WrapperNode [2022-04-05 05:30:21,178 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-05 05:30:21,179 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-05 05:30:21,179 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-05 05:30:21,179 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-05 05:30:21,187 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 05:30:21" (1/1) ... [2022-04-05 05:30:21,187 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 05:30:21" (1/1) ... [2022-04-05 05:30:21,193 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 05:30:21" (1/1) ... [2022-04-05 05:30:21,194 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 05:30:21" (1/1) ... [2022-04-05 05:30:21,198 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 05:30:21" (1/1) ... [2022-04-05 05:30:21,203 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 05:30:21" (1/1) ... [2022-04-05 05:30:21,207 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 05:30:21" (1/1) ... [2022-04-05 05:30:21,212 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-05 05:30:21,213 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-05 05:30:21,213 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-05 05:30:21,213 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-05 05:30:21,214 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 05:30:21" (1/1) ... [2022-04-05 05:30:21,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 05:30:21,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:30:21,240 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-04-05 05:30:21,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-04-05 05:30:21,283 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-05 05:30:21,283 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-05 05:30:21,284 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-05 05:30:21,284 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-05 05:30:21,284 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-05 05:30:21,284 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-05 05:30:21,285 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-05 05:30:21,285 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-05 05:30:21,286 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-04-05 05:30:21,286 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-04-05 05:30:21,286 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-05 05:30:21,286 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-05 05:30:21,286 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-05 05:30:21,286 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-05 05:30:21,286 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-05 05:30:21,286 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-05 05:30:21,287 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-05 05:30:21,287 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-05 05:30:21,287 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-05 05:30:21,287 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-05 05:30:21,287 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-05 05:30:21,287 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-05 05:30:21,351 INFO L234 CfgBuilder]: Building ICFG [2022-04-05 05:30:21,352 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-05 05:30:21,477 INFO L275 CfgBuilder]: Performing block encoding [2022-04-05 05:30:21,481 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-05 05:30:21,481 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-04-05 05:30:21,483 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 05:30:21 BoogieIcfgContainer [2022-04-05 05:30:21,483 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-05 05:30:21,484 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-04-05 05:30:21,484 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-04-05 05:30:21,507 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-04-05 05:30:21,510 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 05:30:21" (1/1) ... [2022-04-05 05:30:21,512 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_QVASR [2022-04-05 05:30:21,522 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 05.04 05:30:21 BasicIcfg [2022-04-05 05:30:21,522 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-04-05 05:30:21,524 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-05 05:30:21,524 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-05 05:30:21,526 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-05 05:30:21,526 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.04 05:30:20" (1/4) ... [2022-04-05 05:30:21,527 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71ca3408 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 05:30:21, skipping insertion in model container [2022-04-05 05:30:21,527 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 05:30:21" (2/4) ... [2022-04-05 05:30:21,527 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71ca3408 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 05:30:21, skipping insertion in model container [2022-04-05 05:30:21,527 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 05:30:21" (3/4) ... [2022-04-05 05:30:21,528 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71ca3408 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.04 05:30:21, skipping insertion in model container [2022-04-05 05:30:21,528 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 05.04 05:30:21" (4/4) ... [2022-04-05 05:30:21,528 INFO L111 eAbstractionObserver]: Analyzing ICFG count_by_k.iqvasr [2022-04-05 05:30:21,532 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-04-05 05:30:21,532 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-05 05:30:21,568 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-05 05:30:21,574 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-04-05 05:30:21,574 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-05 05:30:21,586 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-05 05:30:21,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-04-05 05:30:21,589 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:30:21,590 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:30:21,590 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:30:21,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:30:21,594 INFO L85 PathProgramCache]: Analyzing trace with hash -1527693123, now seen corresponding path program 1 times [2022-04-05 05:30:21,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:30:21,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143042403] [2022-04-05 05:30:21,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:30:21,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:30:21,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:30:21,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:30:21,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:30:21,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 05:30:21,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:30:21,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143042403] [2022-04-05 05:30:21,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143042403] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 05:30:21,786 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 05:30:21,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-05 05:30:21,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554437429] [2022-04-05 05:30:21,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 05:30:21,792 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-05 05:30:21,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:30:21,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-05 05:30:21,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-05 05:30:21,820 INFO L87 Difference]: Start difference. First operand has 21 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:30:21,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:30:21,865 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2022-04-05 05:30:21,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-05 05:30:21,868 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-04-05 05:30:21,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:30:21,875 INFO L225 Difference]: With dead ends: 33 [2022-04-05 05:30:21,876 INFO L226 Difference]: Without dead ends: 14 [2022-04-05 05:30:21,878 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-05 05:30:21,882 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 13 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 05:30:21,883 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 24 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 05:30:21,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-04-05 05:30:21,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-04-05 05:30:21,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:30:21,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2022-04-05 05:30:21,916 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2022-04-05 05:30:21,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:30:21,917 INFO L478 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2022-04-05 05:30:21,918 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:30:21,918 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2022-04-05 05:30:21,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-04-05 05:30:21,919 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:30:21,919 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:30:21,919 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-05 05:30:21,920 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:30:21,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:30:21,923 INFO L85 PathProgramCache]: Analyzing trace with hash -1526769602, now seen corresponding path program 1 times [2022-04-05 05:30:21,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:30:21,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306776979] [2022-04-05 05:30:21,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:30:21,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:30:21,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:30:22,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:30:22,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:30:22,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 05:30:22,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:30:22,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306776979] [2022-04-05 05:30:22,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306776979] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 05:30:22,109 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 05:30:22,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-05 05:30:22,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827606842] [2022-04-05 05:30:22,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 05:30:22,111 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-05 05:30:22,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:30:22,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-05 05:30:22,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-04-05 05:30:22,112 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:30:22,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:30:22,216 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2022-04-05 05:30:22,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-05 05:30:22,217 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-04-05 05:30:22,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:30:22,218 INFO L225 Difference]: With dead ends: 21 [2022-04-05 05:30:22,218 INFO L226 Difference]: Without dead ends: 16 [2022-04-05 05:30:22,219 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-04-05 05:30:22,220 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 14 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 05:30:22,220 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 32 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 05:30:22,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-04-05 05:30:22,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2022-04-05 05:30:22,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:30:22,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2022-04-05 05:30:22,225 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2022-04-05 05:30:22,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:30:22,225 INFO L478 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2022-04-05 05:30:22,225 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:30:22,225 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2022-04-05 05:30:22,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-04-05 05:30:22,226 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:30:22,226 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:30:22,226 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-05 05:30:22,227 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:30:22,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:30:22,227 INFO L85 PathProgramCache]: Analyzing trace with hash -1730344036, now seen corresponding path program 1 times [2022-04-05 05:30:22,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:30:22,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524580462] [2022-04-05 05:30:22,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:30:22,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:30:22,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:30:22,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:30:22,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:30:22,312 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 05:30:22,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:30:22,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524580462] [2022-04-05 05:30:22,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524580462] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 05:30:22,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062851231] [2022-04-05 05:30:22,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:30:22,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:30:22,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:30:22,315 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 05:30:22,330 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-05 05:30:22,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:30:22,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-05 05:30:22,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 05:30:22,478 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 05:30:22,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 05:30:22,625 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 05:30:22,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062851231] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 05:30:22,625 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 05:30:22,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 14 [2022-04-05 05:30:22,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662552460] [2022-04-05 05:30:22,626 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 05:30:22,627 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-05 05:30:22,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:30:22,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-05 05:30:22,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-04-05 05:30:22,628 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 14 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:30:22,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:30:22,801 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2022-04-05 05:30:22,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-05 05:30:22,801 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-04-05 05:30:22,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:30:22,802 INFO L225 Difference]: With dead ends: 26 [2022-04-05 05:30:22,802 INFO L226 Difference]: Without dead ends: 21 [2022-04-05 05:30:22,803 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2022-04-05 05:30:22,804 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 21 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 05:30:22,804 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 44 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 05:30:22,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-04-05 05:30:22,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-04-05 05:30:22,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.0625) internal successors, (17), 16 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:30:22,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2022-04-05 05:30:22,816 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 14 [2022-04-05 05:30:22,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:30:22,816 INFO L478 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2022-04-05 05:30:22,817 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:30:22,817 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2022-04-05 05:30:22,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-04-05 05:30:22,817 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:30:22,818 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:30:22,843 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-05 05:30:23,035 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:30:23,036 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:30:23,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:30:23,036 INFO L85 PathProgramCache]: Analyzing trace with hash -349607754, now seen corresponding path program 2 times [2022-04-05 05:30:23,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:30:23,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746173629] [2022-04-05 05:30:23,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:30:23,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:30:23,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:30:23,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:30:23,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:30:23,167 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 05:30:23,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:30:23,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746173629] [2022-04-05 05:30:23,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746173629] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 05:30:23,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303584757] [2022-04-05 05:30:23,168 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 05:30:23,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:30:23,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:30:23,172 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 05:30:23,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-05 05:30:23,213 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 05:30:23,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 05:30:23,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-05 05:30:23,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 05:30:23,350 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 05:30:23,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 05:30:23,511 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 05:30:23,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303584757] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 05:30:23,512 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 05:30:23,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 17 [2022-04-05 05:30:23,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893915650] [2022-04-05 05:30:23,512 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 05:30:23,513 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-05 05:30:23,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:30:23,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-05 05:30:23,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2022-04-05 05:30:23,514 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 states have internal predecessors, (33), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:30:23,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:30:23,793 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2022-04-05 05:30:23,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-05 05:30:23,794 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 states have internal predecessors, (33), 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 20 [2022-04-05 05:30:23,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:30:23,795 INFO L225 Difference]: With dead ends: 36 [2022-04-05 05:30:23,795 INFO L226 Difference]: Without dead ends: 31 [2022-04-05 05:30:23,795 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=226, Invalid=530, Unknown=0, NotChecked=0, Total=756 [2022-04-05 05:30:23,796 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 36 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 05:30:23,797 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 34 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 05:30:23,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-04-05 05:30:23,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-04-05 05:30:23,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 26 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:30:23,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2022-04-05 05:30:23,803 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 20 [2022-04-05 05:30:23,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:30:23,803 INFO L478 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2022-04-05 05:30:23,803 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 states have internal predecessors, (33), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:30:23,803 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2022-04-05 05:30:23,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-04-05 05:30:23,804 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:30:23,804 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:30:23,830 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-05 05:30:24,019 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,SelfDestructingSolverStorable3 [2022-04-05 05:30:24,020 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:30:24,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:30:24,020 INFO L85 PathProgramCache]: Analyzing trace with hash 751745164, now seen corresponding path program 3 times [2022-04-05 05:30:24,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:30:24,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218200494] [2022-04-05 05:30:24,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:30:24,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:30:24,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:30:24,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:30:24,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:30:24,190 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 05:30:24,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:30:24,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218200494] [2022-04-05 05:30:24,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218200494] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 05:30:24,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383406832] [2022-04-05 05:30:24,192 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-05 05:30:24,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:30:24,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:30:24,193 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 05:30:24,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-05 05:30:24,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-04-05 05:30:24,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 05:30:24,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-05 05:30:24,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 05:30:24,359 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 05:30:24,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 05:30:24,639 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 05:30:24,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383406832] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 05:30:24,639 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 05:30:24,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 27 [2022-04-05 05:30:24,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525421830] [2022-04-05 05:30:24,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 05:30:24,640 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-04-05 05:30:24,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:30:24,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-04-05 05:30:24,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=506, Unknown=0, NotChecked=0, Total=702 [2022-04-05 05:30:24,641 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 26 states have internal predecessors, (53), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:30:25,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:30:25,322 INFO L93 Difference]: Finished difference Result 56 states and 65 transitions. [2022-04-05 05:30:25,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-04-05 05:30:25,323 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 26 states have internal predecessors, (53), 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 30 [2022-04-05 05:30:25,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:30:25,324 INFO L225 Difference]: With dead ends: 56 [2022-04-05 05:30:25,324 INFO L226 Difference]: Without dead ends: 51 [2022-04-05 05:30:25,325 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=706, Invalid=1550, Unknown=0, NotChecked=0, Total=2256 [2022-04-05 05:30:25,326 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 89 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 05:30:25,326 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 34 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 05:30:25,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-04-05 05:30:25,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-04-05 05:30:25,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.0217391304347827) internal successors, (47), 46 states have internal predecessors, (47), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:30:25,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2022-04-05 05:30:25,334 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 30 [2022-04-05 05:30:25,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:30:25,335 INFO L478 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2022-04-05 05:30:25,335 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 26 states have internal predecessors, (53), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:30:25,335 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2022-04-05 05:30:25,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-04-05 05:30:25,336 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:30:25,336 INFO L499 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:30:25,362 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-05 05:30:25,559 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:30:25,560 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:30:25,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:30:25,561 INFO L85 PathProgramCache]: Analyzing trace with hash 659537336, now seen corresponding path program 4 times [2022-04-05 05:30:25,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:30:25,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901293714] [2022-04-05 05:30:25,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:30:25,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:30:25,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:30:25,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:30:25,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:30:25,890 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 05:30:25,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:30:25,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901293714] [2022-04-05 05:30:25,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901293714] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 05:30:25,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831025891] [2022-04-05 05:30:25,891 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-05 05:30:25,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:30:25,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:30:25,895 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 05:30:25,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-05 05:30:25,935 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-05 05:30:25,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 05:30:25,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 22 conjunts are in the unsatisfiable core [2022-04-05 05:30:25,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 05:30:26,159 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 05:30:26,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 05:30:26,936 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 05:30:26,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831025891] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 05:30:26,936 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 05:30:26,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 47 [2022-04-05 05:30:26,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340086913] [2022-04-05 05:30:26,937 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 05:30:26,937 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-04-05 05:30:26,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:30:26,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-04-05 05:30:26,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=671, Invalid=1491, Unknown=0, NotChecked=0, Total=2162 [2022-04-05 05:30:26,939 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand has 47 states, 47 states have (on average 1.9787234042553192) internal successors, (93), 46 states have internal predecessors, (93), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:30:28,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:30:28,640 INFO L93 Difference]: Finished difference Result 96 states and 115 transitions. [2022-04-05 05:30:28,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-04-05 05:30:28,642 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9787234042553192) internal successors, (93), 46 states have internal predecessors, (93), 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 50 [2022-04-05 05:30:28,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:30:28,645 INFO L225 Difference]: With dead ends: 96 [2022-04-05 05:30:28,645 INFO L226 Difference]: Without dead ends: 91 [2022-04-05 05:30:28,648 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1152 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2491, Invalid=5165, Unknown=0, NotChecked=0, Total=7656 [2022-04-05 05:30:28,650 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 142 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-05 05:30:28,650 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 49 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-05 05:30:28,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-04-05 05:30:28,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2022-04-05 05:30:28,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 86 states have (on average 1.0116279069767442) internal successors, (87), 86 states have internal predecessors, (87), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:30:28,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2022-04-05 05:30:28,665 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 50 [2022-04-05 05:30:28,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:30:28,665 INFO L478 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2022-04-05 05:30:28,665 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.9787234042553192) internal successors, (93), 46 states have internal predecessors, (93), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:30:28,665 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2022-04-05 05:30:28,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-04-05 05:30:28,667 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:30:28,667 INFO L499 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:30:28,690 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-05 05:30:28,883 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:30:28,884 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:30:28,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:30:28,885 INFO L85 PathProgramCache]: Analyzing trace with hash -263856624, now seen corresponding path program 5 times [2022-04-05 05:30:28,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:30:28,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625974356] [2022-04-05 05:30:28,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:30:28,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:30:28,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:30:29,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:30:29,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:30:29,761 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 05:30:29,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:30:29,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625974356] [2022-04-05 05:30:29,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625974356] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 05:30:29,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166497553] [2022-04-05 05:30:29,761 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-05 05:30:29,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:30:29,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:30:29,763 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 05:30:29,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-05 05:30:29,820 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2022-04-05 05:30:29,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 05:30:29,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 42 conjunts are in the unsatisfiable core [2022-04-05 05:30:29,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 05:30:31,074 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 05:30:31,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 05:30:33,363 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 05:30:33,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166497553] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 05:30:33,363 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 05:30:33,364 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43, 43] total 104 [2022-04-05 05:30:33,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327261094] [2022-04-05 05:30:33,364 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 05:30:33,365 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2022-04-05 05:30:33,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:30:33,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2022-04-05 05:30:33,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2170, Invalid=8542, Unknown=0, NotChecked=0, Total=10712 [2022-04-05 05:30:33,370 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand has 104 states, 104 states have (on average 1.9903846153846154) internal successors, (207), 103 states have internal predecessors, (207), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:30:42,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:30:42,658 INFO L93 Difference]: Finished difference Result 176 states and 215 transitions. [2022-04-05 05:30:42,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-04-05 05:30:42,659 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 1.9903846153846154) internal successors, (207), 103 states have internal predecessors, (207), 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 90 [2022-04-05 05:30:42,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:30:42,660 INFO L225 Difference]: With dead ends: 176 [2022-04-05 05:30:42,660 INFO L226 Difference]: Without dead ends: 171 [2022-04-05 05:30:42,668 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 121 SyntacticMatches, 1 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6310 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=9387, Invalid=24653, Unknown=0, NotChecked=0, Total=34040 [2022-04-05 05:30:42,668 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 261 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-05 05:30:42,668 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [261 Valid, 134 Invalid, 561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 342 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-05 05:30:42,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-04-05 05:30:42,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2022-04-05 05:30:42,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 166 states have (on average 1.0060240963855422) internal successors, (167), 166 states have internal predecessors, (167), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:30:42,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 171 transitions. [2022-04-05 05:30:42,684 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 171 transitions. Word has length 90 [2022-04-05 05:30:42,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:30:42,684 INFO L478 AbstractCegarLoop]: Abstraction has 171 states and 171 transitions. [2022-04-05 05:30:42,685 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 1.9903846153846154) internal successors, (207), 103 states have internal predecessors, (207), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:30:42,685 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 171 transitions. [2022-04-05 05:30:42,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2022-04-05 05:30:42,687 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:30:42,687 INFO L499 BasicCegarLoop]: trace histogram [79, 79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:30:42,704 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-05 05:30:42,891 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:30:42,892 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:30:42,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:30:42,892 INFO L85 PathProgramCache]: Analyzing trace with hash 689338048, now seen corresponding path program 6 times [2022-04-05 05:30:42,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:30:42,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802926692] [2022-04-05 05:30:42,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:30:42,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:30:43,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:30:45,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:30:45,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:30:45,504 INFO L134 CoverageAnalysis]: Checked inductivity of 6241 backedges. 0 proven. 6241 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 05:30:45,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:30:45,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802926692] [2022-04-05 05:30:45,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802926692] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 05:30:45,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067493630] [2022-04-05 05:30:45,505 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-05 05:30:45,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:30:45,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:30:45,506 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 05:30:45,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-05 05:30:45,613 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 80 check-sat command(s) [2022-04-05 05:30:45,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 05:30:45,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 82 conjunts are in the unsatisfiable core [2022-04-05 05:30:45,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 05:30:46,228 INFO L134 CoverageAnalysis]: Checked inductivity of 6241 backedges. 0 proven. 6241 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 05:30:46,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 05:30:53,935 INFO L134 CoverageAnalysis]: Checked inductivity of 6241 backedges. 0 proven. 6241 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 05:30:53,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067493630] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 05:30:53,935 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 05:30:53,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 83, 83] total 167 [2022-04-05 05:30:53,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942941963] [2022-04-05 05:30:53,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 05:30:53,936 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 167 states [2022-04-05 05:30:53,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:30:53,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 167 interpolants. [2022-04-05 05:30:53,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9821, Invalid=17901, Unknown=0, NotChecked=0, Total=27722 [2022-04-05 05:30:53,943 INFO L87 Difference]: Start difference. First operand 171 states and 171 transitions. Second operand has 167 states, 167 states have (on average 1.9940119760479043) internal successors, (333), 166 states have internal predecessors, (333), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:31:17,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:31:17,006 INFO L93 Difference]: Finished difference Result 336 states and 415 transitions. [2022-04-05 05:31:17,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 164 states. [2022-04-05 05:31:17,007 INFO L78 Accepts]: Start accepts. Automaton has has 167 states, 167 states have (on average 1.9940119760479043) internal successors, (333), 166 states have internal predecessors, (333), 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 170 [2022-04-05 05:31:17,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:31:17,009 INFO L225 Difference]: With dead ends: 336 [2022-04-05 05:31:17,009 INFO L226 Difference]: Without dead ends: 331 [2022-04-05 05:31:17,016 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 585 GetRequests, 258 SyntacticMatches, 1 SemanticMatches, 326 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16602 ImplicationChecksByTransitivity, 31.7s TimeCoverageRelationStatistics Valid=36301, Invalid=70955, Unknown=0, NotChecked=0, Total=107256 [2022-04-05 05:31:17,017 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 717 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 402 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 717 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 402 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-05 05:31:17,017 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [717 Valid, 39 Invalid, 763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [402 Valid, 361 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-05 05:31:17,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2022-04-05 05:31:17,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 331. [2022-04-05 05:31:17,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 326 states have (on average 1.0030674846625767) internal successors, (327), 326 states have internal predecessors, (327), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:31:17,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 331 transitions. [2022-04-05 05:31:17,042 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 331 transitions. Word has length 170 [2022-04-05 05:31:17,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:31:17,042 INFO L478 AbstractCegarLoop]: Abstraction has 331 states and 331 transitions. [2022-04-05 05:31:17,043 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 167 states, 167 states have (on average 1.9940119760479043) internal successors, (333), 166 states have internal predecessors, (333), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:31:17,043 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 331 transitions. [2022-04-05 05:31:17,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2022-04-05 05:31:17,047 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:31:17,047 INFO L499 BasicCegarLoop]: trace histogram [159, 159, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:31:17,065 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-04-05 05:31:17,259 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:31:17,260 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:31:17,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:31:17,260 INFO L85 PathProgramCache]: Analyzing trace with hash -756479968, now seen corresponding path program 7 times [2022-04-05 05:31:17,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:31:17,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927086930] [2022-04-05 05:31:17,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:31:17,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:31:17,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:31:27,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:31:27,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:31:27,357 INFO L134 CoverageAnalysis]: Checked inductivity of 25281 backedges. 0 proven. 25281 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 05:31:27,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:31:27,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927086930] [2022-04-05 05:31:27,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927086930] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 05:31:27,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729147020] [2022-04-05 05:31:27,357 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-04-05 05:31:27,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:31:27,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:31:27,358 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 05:31:27,359 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-05 05:31:29,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:31:31,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 530 conjuncts, 162 conjunts are in the unsatisfiable core [2022-04-05 05:31:31,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 05:31:32,089 INFO L134 CoverageAnalysis]: Checked inductivity of 25281 backedges. 0 proven. 25281 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 05:31:32,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 05:32:00,435 INFO L134 CoverageAnalysis]: Checked inductivity of 25281 backedges. 0 proven. 25281 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 05:32:00,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729147020] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 05:32:00,436 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 05:32:00,436 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [164, 163, 163] total 327 [2022-04-05 05:32:00,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289739641] [2022-04-05 05:32:00,437 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 05:32:00,438 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 327 states [2022-04-05 05:32:00,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:32:00,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 327 interpolants. [2022-04-05 05:32:00,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38821, Invalid=67781, Unknown=0, NotChecked=0, Total=106602 [2022-04-05 05:32:00,451 INFO L87 Difference]: Start difference. First operand 331 states and 331 transitions. Second operand has 327 states, 327 states have (on average 1.996941896024465) internal successors, (653), 326 states have internal predecessors, (653), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:33:58,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:33:58,926 INFO L93 Difference]: Finished difference Result 656 states and 815 transitions. [2022-04-05 05:33:58,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 324 states. [2022-04-05 05:33:58,927 INFO L78 Accepts]: Start accepts. Automaton has has 327 states, 327 states have (on average 1.996941896024465) internal successors, (653), 326 states have internal predecessors, (653), 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 330 [2022-04-05 05:33:58,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:33:58,930 INFO L225 Difference]: With dead ends: 656 [2022-04-05 05:33:58,930 INFO L226 Difference]: Without dead ends: 651 [2022-04-05 05:33:58,950 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1145 GetRequests, 498 SyntacticMatches, 1 SemanticMatches, 646 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65202 ImplicationChecksByTransitivity, 151.3s TimeCoverageRelationStatistics Valid=142981, Invalid=276275, Unknown=0, NotChecked=0, Total=419256 [2022-04-05 05:33:58,951 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 1439 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 705 mSolverCounterSat, 961 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1439 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 1666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 961 IncrementalHoareTripleChecker+Valid, 705 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-04-05 05:33:58,951 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1439 Valid, 54 Invalid, 1666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [961 Valid, 705 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-04-05 05:33:58,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2022-04-05 05:33:58,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 651. [2022-04-05 05:33:58,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 651 states, 646 states have (on average 1.001547987616099) internal successors, (647), 646 states have internal predecessors, (647), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:33:58,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 651 states to 651 states and 651 transitions. [2022-04-05 05:33:58,989 INFO L78 Accepts]: Start accepts. Automaton has 651 states and 651 transitions. Word has length 330 [2022-04-05 05:33:58,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:33:58,990 INFO L478 AbstractCegarLoop]: Abstraction has 651 states and 651 transitions. [2022-04-05 05:33:58,990 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 327 states, 327 states have (on average 1.996941896024465) internal successors, (653), 326 states have internal predecessors, (653), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:33:58,990 INFO L276 IsEmpty]: Start isEmpty. Operand 651 states and 651 transitions. [2022-04-05 05:33:59,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 651 [2022-04-05 05:33:59,002 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:33:59,002 INFO L499 BasicCegarLoop]: trace histogram [319, 319, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:33:59,025 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-04-05 05:33:59,215 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:33:59,215 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:33:59,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:33:59,216 INFO L85 PathProgramCache]: Analyzing trace with hash 743680736, now seen corresponding path program 8 times [2022-04-05 05:33:59,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:33:59,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373435448] [2022-04-05 05:33:59,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:33:59,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:34:02,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:34:36,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:34:36,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:34:36,669 INFO L134 CoverageAnalysis]: Checked inductivity of 101761 backedges. 0 proven. 101761 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 05:34:36,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:34:36,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373435448] [2022-04-05 05:34:36,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373435448] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 05:34:36,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375472881] [2022-04-05 05:34:36,670 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 05:34:36,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:34:36,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:34:36,676 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 05:34:36,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-05 05:34:53,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 05:34:53,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 05:35:04,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 1010 conjuncts, 322 conjunts are in the unsatisfiable core [2022-04-05 05:35:04,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 05:35:05,978 INFO L134 CoverageAnalysis]: Checked inductivity of 101761 backedges. 0 proven. 101761 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 05:35:05,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 05:36:53,167 INFO L134 CoverageAnalysis]: Checked inductivity of 101761 backedges. 0 proven. 101761 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 05:36:53,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375472881] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 05:36:53,168 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 05:36:53,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [324, 323, 323] total 647 [2022-04-05 05:36:53,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610550540] [2022-04-05 05:36:53,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 05:36:53,170 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 647 states [2022-04-05 05:36:53,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:36:53,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 647 interpolants. [2022-04-05 05:36:53,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154421, Invalid=263541, Unknown=0, NotChecked=0, Total=417962 [2022-04-05 05:36:53,214 INFO L87 Difference]: Start difference. First operand 651 states and 651 transitions. Second operand has 647 states, 647 states have (on average 1.998454404945904) internal successors, (1293), 646 states have internal predecessors, (1293), 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)