/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/array-industry-pattern/check_removal_from_set_after_insertion.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 08:23:20,369 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 08:23:20,371 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 08:23:20,419 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-31 08:23:20,420 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-31 08:23:20,420 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-31 08:23:20,422 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-31 08:23:20,435 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-31 08:23:20,437 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-31 08:23:20,438 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-31 08:23:20,438 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-31 08:23:20,439 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-31 08:23:20,440 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 08:23:20,441 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 08:23:20,441 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 08:23:20,442 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 08:23:20,443 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 08:23:20,444 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 08:23:20,445 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 08:23:20,450 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 08:23:20,452 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 08:23:20,454 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 08:23:20,455 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 08:23:20,456 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 08:23:20,458 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 08:23:20,465 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 08:23:20,466 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 08:23:20,466 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 08:23:20,467 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-01-31 08:23:20,476 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 08:23:20,477 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 08:23:20,478 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 08:23:20,478 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 08:23:20,478 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 08:23:20,479 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 08:23:20,479 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 08:23:20,479 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 08:23:20,479 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 08:23:20,479 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 08:23:20,480 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 08:23:20,480 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 08:23:20,480 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 08:23:20,480 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 08:23:20,480 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 08:23:20,480 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 08:23:20,480 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 08:23:20,480 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 08:23:20,480 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 08:23:20,481 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 08:23:20,481 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 08:23:20,481 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-31 08:23:20,481 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 08:23:20,729 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 08:23:20,754 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 08:23:20,756 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 08:23:20,757 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 08:23:20,758 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 08:23:20,759 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-industry-pattern/check_removal_from_set_after_insertion.c [2022-01-31 08:23:20,817 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/489e92708/d088d162575d4e5eb84626e750fd15af/FLAG753c8c208 [2022-01-31 08:23:21,247 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 08:23:21,247 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-industry-pattern/check_removal_from_set_after_insertion.c [2022-01-31 08:23:21,256 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/489e92708/d088d162575d4e5eb84626e750fd15af/FLAG753c8c208 [2022-01-31 08:23:21,277 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/489e92708/d088d162575d4e5eb84626e750fd15af [2022-01-31 08:23:21,279 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 08:23:21,281 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-31 08:23:21,284 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 08:23:21,285 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 08:23:21,287 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 08:23:21,288 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 08:23:21" (1/1) ... [2022-01-31 08:23:21,289 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@704e662b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:23:21, skipping insertion in model container [2022-01-31 08:23:21,289 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 08:23:21" (1/1) ... [2022-01-31 08:23:21,295 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 08:23:21,308 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 08:23:21,499 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-industry-pattern/check_removal_from_set_after_insertion.c[342,355] [2022-01-31 08:23:21,525 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 08:23:21,531 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 08:23:21,541 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-industry-pattern/check_removal_from_set_after_insertion.c[342,355] [2022-01-31 08:23:21,549 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 08:23:21,559 INFO L208 MainTranslator]: Completed translation [2022-01-31 08:23:21,560 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:23:21 WrapperNode [2022-01-31 08:23:21,560 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 08:23:21,561 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 08:23:21,561 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 08:23:21,561 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 08:23:21,570 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:23:21" (1/1) ... [2022-01-31 08:23:21,570 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:23:21" (1/1) ... [2022-01-31 08:23:21,576 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:23:21" (1/1) ... [2022-01-31 08:23:21,576 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:23:21" (1/1) ... [2022-01-31 08:23:21,582 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:23:21" (1/1) ... [2022-01-31 08:23:21,586 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:23:21" (1/1) ... [2022-01-31 08:23:21,587 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:23:21" (1/1) ... [2022-01-31 08:23:21,589 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 08:23:21,590 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 08:23:21,590 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 08:23:21,590 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 08:23:21,591 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:23:21" (1/1) ... [2022-01-31 08:23:21,596 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 08:23:21,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:23:21,616 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) [2022-01-31 08:23:21,635 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 [2022-01-31 08:23:21,658 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 08:23:21,659 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 08:23:21,659 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 08:23:21,659 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 08:23:21,659 INFO L138 BoogieDeclarations]: Found implementation of procedure insert [2022-01-31 08:23:21,660 INFO L138 BoogieDeclarations]: Found implementation of procedure elem_exists [2022-01-31 08:23:21,660 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 08:23:21,660 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 08:23:21,660 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 08:23:21,660 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 08:23:21,661 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 08:23:21,661 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 08:23:21,661 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 08:23:21,661 INFO L130 BoogieDeclarations]: Found specification of procedure insert [2022-01-31 08:23:21,662 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 08:23:21,662 INFO L130 BoogieDeclarations]: Found specification of procedure elem_exists [2022-01-31 08:23:21,664 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 08:23:21,664 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 08:23:21,664 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-31 08:23:21,664 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 08:23:21,664 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 08:23:21,664 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 08:23:21,664 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 08:23:21,734 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 08:23:21,736 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 08:23:21,971 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 08:23:21,980 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 08:23:21,980 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2022-01-31 08:23:21,982 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 08:23:21 BoogieIcfgContainer [2022-01-31 08:23:21,982 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 08:23:21,983 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-31 08:23:21,983 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-31 08:23:21,986 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-31 08:23:21,989 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 08:23:21" (1/1) ... [2022-01-31 08:23:22,020 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 08:23:22 BasicIcfg [2022-01-31 08:23:22,020 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-31 08:23:22,021 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 08:23:22,021 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 08:23:22,028 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 08:23:22,028 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 08:23:21" (1/4) ... [2022-01-31 08:23:22,029 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f7bfad8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 08:23:22, skipping insertion in model container [2022-01-31 08:23:22,029 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:23:21" (2/4) ... [2022-01-31 08:23:22,030 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f7bfad8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 08:23:22, skipping insertion in model container [2022-01-31 08:23:22,030 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 08:23:21" (3/4) ... [2022-01-31 08:23:22,030 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f7bfad8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 08:23:22, skipping insertion in model container [2022-01-31 08:23:22,031 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 08:23:22" (4/4) ... [2022-01-31 08:23:22,031 INFO L111 eAbstractionObserver]: Analyzing ICFG check_removal_from_set_after_insertion.cJordan [2022-01-31 08:23:22,036 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-01-31 08:23:22,036 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 08:23:22,080 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 08:23:22,087 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-31 08:23:22,088 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 08:23:22,102 INFO L276 IsEmpty]: Start isEmpty. Operand has 49 states, 37 states have (on average 1.5135135135135136) internal successors, (56), 38 states have internal predecessors, (56), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 08:23:22,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-31 08:23:22,109 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:23:22,110 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:23:22,110 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:23:22,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:23:22,115 INFO L85 PathProgramCache]: Analyzing trace with hash 1425981370, now seen corresponding path program 1 times [2022-01-31 08:23:22,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:23:22,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314393696] [2022-01-31 08:23:22,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:23:22,124 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:23:22,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:22,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:23:22,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:22,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 08:23:22,335 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:23:22,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314393696] [2022-01-31 08:23:22,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314393696] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 08:23:22,336 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 08:23:22,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 08:23:22,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843023374] [2022-01-31 08:23:22,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 08:23:22,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 08:23:22,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:23:22,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 08:23:22,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 08:23:22,371 INFO L87 Difference]: Start difference. First operand has 49 states, 37 states have (on average 1.5135135135135136) internal successors, (56), 38 states have internal predecessors, (56), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 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) [2022-01-31 08:23:22,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:23:22,440 INFO L93 Difference]: Finished difference Result 49 states and 59 transitions. [2022-01-31 08:23:22,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 08:23:22,442 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 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 18 [2022-01-31 08:23:22,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:23:22,451 INFO L225 Difference]: With dead ends: 49 [2022-01-31 08:23:22,451 INFO L226 Difference]: Without dead ends: 44 [2022-01-31 08:23:22,452 INFO L932 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 [2022-01-31 08:23:22,456 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 46 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 08:23:22,458 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 48 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 08:23:22,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-01-31 08:23:22,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-01-31 08:23:22,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 34 states have (on average 1.2941176470588236) internal successors, (44), 34 states have internal predecessors, (44), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 08:23:22,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2022-01-31 08:23:22,490 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 18 [2022-01-31 08:23:22,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:23:22,490 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2022-01-31 08:23:22,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 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) [2022-01-31 08:23:22,491 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2022-01-31 08:23:22,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-31 08:23:22,493 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:23:22,493 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:23:22,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 08:23:22,493 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:23:22,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:23:22,497 INFO L85 PathProgramCache]: Analyzing trace with hash -997092872, now seen corresponding path program 1 times [2022-01-31 08:23:22,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:23:22,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228398485] [2022-01-31 08:23:22,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:23:22,498 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:23:22,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:22,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:23:22,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:22,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 08:23:22,629 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:23:22,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228398485] [2022-01-31 08:23:22,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228398485] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 08:23:22,629 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 08:23:22,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 08:23:22,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709447657] [2022-01-31 08:23:22,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 08:23:22,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 08:23:22,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:23:22,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 08:23:22,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 08:23:22,631 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:23:22,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:23:22,767 INFO L93 Difference]: Finished difference Result 55 states and 68 transitions. [2022-01-31 08:23:22,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 08:23:22,768 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2022-01-31 08:23:22,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:23:22,769 INFO L225 Difference]: With dead ends: 55 [2022-01-31 08:23:22,769 INFO L226 Difference]: Without dead ends: 55 [2022-01-31 08:23:22,770 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-31 08:23:22,771 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 112 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 08:23:22,771 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 39 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 08:23:22,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-01-31 08:23:22,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 45. [2022-01-31 08:23:22,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 35 states have (on average 1.2857142857142858) internal successors, (45), 35 states have internal predecessors, (45), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 08:23:22,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 54 transitions. [2022-01-31 08:23:22,793 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 54 transitions. Word has length 18 [2022-01-31 08:23:22,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:23:22,793 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 54 transitions. [2022-01-31 08:23:22,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:23:22,794 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 54 transitions. [2022-01-31 08:23:22,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-31 08:23:22,794 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:23:22,795 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:23:22,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 08:23:22,795 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:23:22,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:23:22,795 INFO L85 PathProgramCache]: Analyzing trace with hash 417692410, now seen corresponding path program 1 times [2022-01-31 08:23:22,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:23:22,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20311768] [2022-01-31 08:23:22,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:23:22,796 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:23:22,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:22,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:23:22,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:22,878 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 08:23:22,878 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:23:22,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20311768] [2022-01-31 08:23:22,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20311768] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 08:23:22,879 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 08:23:22,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 08:23:22,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314828361] [2022-01-31 08:23:22,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 08:23:22,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 08:23:22,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:23:22,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 08:23:22,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 08:23:22,880 INFO L87 Difference]: Start difference. First operand 45 states and 54 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 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) [2022-01-31 08:23:23,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:23:23,001 INFO L93 Difference]: Finished difference Result 52 states and 64 transitions. [2022-01-31 08:23:23,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 08:23:23,001 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 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) Word has length 20 [2022-01-31 08:23:23,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:23:23,004 INFO L225 Difference]: With dead ends: 52 [2022-01-31 08:23:23,004 INFO L226 Difference]: Without dead ends: 52 [2022-01-31 08:23:23,008 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-31 08:23:23,010 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 95 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 08:23:23,011 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 41 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 08:23:23,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-01-31 08:23:23,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 46. [2022-01-31 08:23:23,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 36 states have (on average 1.2777777777777777) internal successors, (46), 36 states have internal predecessors, (46), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 08:23:23,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 55 transitions. [2022-01-31 08:23:23,027 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 55 transitions. Word has length 20 [2022-01-31 08:23:23,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:23:23,028 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 55 transitions. [2022-01-31 08:23:23,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 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) [2022-01-31 08:23:23,028 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 55 transitions. [2022-01-31 08:23:23,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-31 08:23:23,029 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:23:23,029 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:23:23,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-31 08:23:23,029 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:23:23,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:23:23,030 INFO L85 PathProgramCache]: Analyzing trace with hash -866307698, now seen corresponding path program 1 times [2022-01-31 08:23:23,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:23:23,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14435773] [2022-01-31 08:23:23,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:23:23,030 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:23:23,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:23,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:23:23,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:23,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 08:23:23,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:23,101 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 08:23:23,102 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:23:23,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14435773] [2022-01-31 08:23:23,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14435773] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 08:23:23,102 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 08:23:23,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 08:23:23,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94158420] [2022-01-31 08:23:23,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 08:23:23,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 08:23:23,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:23:23,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 08:23:23,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-31 08:23:23,104 INFO L87 Difference]: Start difference. First operand 46 states and 55 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 08:23:23,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:23:23,206 INFO L93 Difference]: Finished difference Result 50 states and 59 transitions. [2022-01-31 08:23:23,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 08:23:23,207 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 30 [2022-01-31 08:23:23,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:23:23,208 INFO L225 Difference]: With dead ends: 50 [2022-01-31 08:23:23,208 INFO L226 Difference]: Without dead ends: 50 [2022-01-31 08:23:23,208 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-01-31 08:23:23,209 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 44 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 08:23:23,210 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 50 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 08:23:23,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-01-31 08:23:23,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-01-31 08:23:23,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 39 states have (on average 1.2564102564102564) internal successors, (49), 39 states have internal predecessors, (49), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 08:23:23,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 59 transitions. [2022-01-31 08:23:23,214 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 59 transitions. Word has length 30 [2022-01-31 08:23:23,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:23:23,215 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 59 transitions. [2022-01-31 08:23:23,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 08:23:23,215 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 59 transitions. [2022-01-31 08:23:23,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-31 08:23:23,216 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:23:23,216 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:23:23,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-31 08:23:23,216 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:23:23,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:23:23,217 INFO L85 PathProgramCache]: Analyzing trace with hash -23532178, now seen corresponding path program 1 times [2022-01-31 08:23:23,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:23:23,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788527054] [2022-01-31 08:23:23,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:23:23,218 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:23:23,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:23,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:23:23,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:23,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 08:23:23,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:23,329 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 08:23:23,329 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:23:23,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788527054] [2022-01-31 08:23:23,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788527054] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 08:23:23,330 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 08:23:23,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 08:23:23,330 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141175530] [2022-01-31 08:23:23,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 08:23:23,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 08:23:23,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:23:23,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 08:23:23,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-31 08:23:23,332 INFO L87 Difference]: Start difference. First operand 50 states and 59 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 08:23:23,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:23:23,526 INFO L93 Difference]: Finished difference Result 59 states and 71 transitions. [2022-01-31 08:23:23,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 08:23:23,530 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 30 [2022-01-31 08:23:23,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:23:23,541 INFO L225 Difference]: With dead ends: 59 [2022-01-31 08:23:23,541 INFO L226 Difference]: Without dead ends: 59 [2022-01-31 08:23:23,541 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-01-31 08:23:23,542 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 56 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 08:23:23,542 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 56 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 08:23:23,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-01-31 08:23:23,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 55. [2022-01-31 08:23:23,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 42 states have (on average 1.2619047619047619) internal successors, (53), 44 states have internal predecessors, (53), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-31 08:23:23,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 66 transitions. [2022-01-31 08:23:23,547 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 66 transitions. Word has length 30 [2022-01-31 08:23:23,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:23:23,547 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 66 transitions. [2022-01-31 08:23:23,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 08:23:23,548 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 66 transitions. [2022-01-31 08:23:23,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-31 08:23:23,549 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:23:23,549 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:23:23,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-31 08:23:23,550 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:23:23,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:23:23,550 INFO L85 PathProgramCache]: Analyzing trace with hash -589677304, now seen corresponding path program 1 times [2022-01-31 08:23:23,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:23:23,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564378750] [2022-01-31 08:23:23,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:23:23,551 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:23:23,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:23,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:23:23,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:23,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 08:23:23,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:23,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-01-31 08:23:23,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:23,636 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-31 08:23:23,636 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:23:23,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564378750] [2022-01-31 08:23:23,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564378750] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 08:23:23,637 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 08:23:23,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 08:23:23,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076057396] [2022-01-31 08:23:23,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 08:23:23,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 08:23:23,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:23:23,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 08:23:23,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-31 08:23:23,638 INFO L87 Difference]: Start difference. First operand 55 states and 66 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-01-31 08:23:23,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:23:23,738 INFO L93 Difference]: Finished difference Result 59 states and 70 transitions. [2022-01-31 08:23:23,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 08:23:23,738 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 35 [2022-01-31 08:23:23,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:23:23,739 INFO L225 Difference]: With dead ends: 59 [2022-01-31 08:23:23,739 INFO L226 Difference]: Without dead ends: 57 [2022-01-31 08:23:23,740 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-01-31 08:23:23,740 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 75 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 08:23:23,741 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 39 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 08:23:23,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-01-31 08:23:23,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-01-31 08:23:23,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 44 states have (on average 1.2272727272727273) internal successors, (54), 46 states have internal predecessors, (54), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-31 08:23:23,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2022-01-31 08:23:23,746 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 35 [2022-01-31 08:23:23,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:23:23,746 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2022-01-31 08:23:23,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-01-31 08:23:23,747 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2022-01-31 08:23:23,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-31 08:23:23,747 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:23:23,748 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:23:23,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-31 08:23:23,748 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:23:23,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:23:23,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1895622688, now seen corresponding path program 1 times [2022-01-31 08:23:23,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:23:23,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917873752] [2022-01-31 08:23:23,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:23:23,749 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:23:23,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:23,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:23:23,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:23,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 08:23:23,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:23,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-01-31 08:23:23,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:23,834 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-31 08:23:23,834 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:23:23,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917873752] [2022-01-31 08:23:23,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917873752] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:23:23,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423436124] [2022-01-31 08:23:23,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:23:23,835 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:23:23,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:23:23,837 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) [2022-01-31 08:23:23,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-31 08:23:23,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:23,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-31 08:23:23,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:23:24,130 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-31 08:23:24,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:23:24,279 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-31 08:23:24,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423436124] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:23:24,280 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:23:24,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 12 [2022-01-31 08:23:24,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004884635] [2022-01-31 08:23:24,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:23:24,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 08:23:24,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:23:24,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 08:23:24,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-01-31 08:23:24,282 INFO L87 Difference]: Start difference. First operand 57 states and 67 transitions. Second operand has 12 states, 12 states have (on average 5.25) internal successors, (63), 10 states have internal predecessors, (63), 4 states have call successors, (11), 6 states have call predecessors, (11), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-01-31 08:23:24,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:23:24,749 INFO L93 Difference]: Finished difference Result 123 states and 149 transitions. [2022-01-31 08:23:24,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 08:23:24,749 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 10 states have internal predecessors, (63), 4 states have call successors, (11), 6 states have call predecessors, (11), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 39 [2022-01-31 08:23:24,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:23:24,751 INFO L225 Difference]: With dead ends: 123 [2022-01-31 08:23:24,751 INFO L226 Difference]: Without dead ends: 123 [2022-01-31 08:23:24,752 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=189, Invalid=461, Unknown=0, NotChecked=0, Total=650 [2022-01-31 08:23:24,752 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 205 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 08:23:24,753 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 40 Invalid, 482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 366 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 08:23:24,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-01-31 08:23:24,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 73. [2022-01-31 08:23:24,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 60 states have (on average 1.2) internal successors, (72), 62 states have internal predecessors, (72), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-31 08:23:24,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2022-01-31 08:23:24,768 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 39 [2022-01-31 08:23:24,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:23:24,770 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2022-01-31 08:23:24,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 10 states have internal predecessors, (63), 4 states have call successors, (11), 6 states have call predecessors, (11), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-01-31 08:23:24,773 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2022-01-31 08:23:24,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-01-31 08:23:24,775 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:23:24,775 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:23:24,807 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-31 08:23:25,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:23:25,001 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:23:25,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:23:25,002 INFO L85 PathProgramCache]: Analyzing trace with hash -1724112236, now seen corresponding path program 2 times [2022-01-31 08:23:25,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:23:25,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461198149] [2022-01-31 08:23:25,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:23:25,002 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:23:25,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:25,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:23:25,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:25,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-31 08:23:25,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:25,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-01-31 08:23:25,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:25,085 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-01-31 08:23:25,086 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:23:25,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461198149] [2022-01-31 08:23:25,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461198149] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 08:23:25,086 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 08:23:25,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 08:23:25,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567468978] [2022-01-31 08:23:25,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 08:23:25,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 08:23:25,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:23:25,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 08:23:25,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-31 08:23:25,088 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand has 5 states, 5 states have (on average 6.8) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-01-31 08:23:25,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:23:25,181 INFO L93 Difference]: Finished difference Result 73 states and 83 transitions. [2022-01-31 08:23:25,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 08:23:25,182 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 48 [2022-01-31 08:23:25,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:23:25,183 INFO L225 Difference]: With dead ends: 73 [2022-01-31 08:23:25,183 INFO L226 Difference]: Without dead ends: 73 [2022-01-31 08:23:25,186 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-01-31 08:23:25,186 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 65 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 08:23:25,187 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 36 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 08:23:25,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-01-31 08:23:25,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2022-01-31 08:23:25,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 60 states have (on average 1.1666666666666667) internal successors, (70), 62 states have internal predecessors, (70), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-31 08:23:25,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 83 transitions. [2022-01-31 08:23:25,204 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 83 transitions. Word has length 48 [2022-01-31 08:23:25,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:23:25,204 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 83 transitions. [2022-01-31 08:23:25,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-01-31 08:23:25,205 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 83 transitions. [2022-01-31 08:23:25,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-01-31 08:23:25,206 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:23:25,206 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:23:25,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-31 08:23:25,206 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:23:25,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:23:25,206 INFO L85 PathProgramCache]: Analyzing trace with hash 2065296435, now seen corresponding path program 1 times [2022-01-31 08:23:25,206 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:23:25,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163215547] [2022-01-31 08:23:25,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:23:25,207 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:23:25,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:25,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:23:25,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:25,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-31 08:23:25,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:25,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-01-31 08:23:25,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:25,339 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-31 08:23:25,339 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:23:25,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163215547] [2022-01-31 08:23:25,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163215547] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:23:25,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355284910] [2022-01-31 08:23:25,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:23:25,340 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:23:25,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:23:25,341 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) [2022-01-31 08:23:25,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-31 08:23:25,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:25,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-31 08:23:25,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:23:25,605 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-31 08:23:25,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:23:25,776 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-31 08:23:25,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355284910] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:23:25,777 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:23:25,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 21 [2022-01-31 08:23:25,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104009641] [2022-01-31 08:23:25,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:23:25,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-31 08:23:25,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:23:25,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-31 08:23:25,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=269, Unknown=0, NotChecked=0, Total=420 [2022-01-31 08:23:25,779 INFO L87 Difference]: Start difference. First operand 73 states and 83 transitions. Second operand has 21 states, 21 states have (on average 3.238095238095238) internal successors, (68), 19 states have internal predecessors, (68), 4 states have call successors, (10), 6 states have call predecessors, (10), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-31 08:23:26,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:23:26,286 INFO L93 Difference]: Finished difference Result 170 states and 197 transitions. [2022-01-31 08:23:26,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-31 08:23:26,287 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.238095238095238) internal successors, (68), 19 states have internal predecessors, (68), 4 states have call successors, (10), 6 states have call predecessors, (10), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 48 [2022-01-31 08:23:26,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:23:26,288 INFO L225 Difference]: With dead ends: 170 [2022-01-31 08:23:26,288 INFO L226 Difference]: Without dead ends: 170 [2022-01-31 08:23:26,289 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=384, Invalid=876, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 08:23:26,289 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 399 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 220 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 399 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 220 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 08:23:26,289 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [399 Valid, 36 Invalid, 562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [220 Valid, 342 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 08:23:26,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-01-31 08:23:26,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 85. [2022-01-31 08:23:26,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 72 states have (on average 1.1388888888888888) internal successors, (82), 74 states have internal predecessors, (82), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-31 08:23:26,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 95 transitions. [2022-01-31 08:23:26,294 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 95 transitions. Word has length 48 [2022-01-31 08:23:26,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:23:26,294 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 95 transitions. [2022-01-31 08:23:26,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.238095238095238) internal successors, (68), 19 states have internal predecessors, (68), 4 states have call successors, (10), 6 states have call predecessors, (10), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-31 08:23:26,294 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 95 transitions. [2022-01-31 08:23:26,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-01-31 08:23:26,295 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:23:26,295 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:23:26,324 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-01-31 08:23:26,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-01-31 08:23:26,509 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:23:26,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:23:26,510 INFO L85 PathProgramCache]: Analyzing trace with hash -626682433, now seen corresponding path program 2 times [2022-01-31 08:23:26,510 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:23:26,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098514600] [2022-01-31 08:23:26,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:23:26,510 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:23:26,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:26,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:23:26,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:26,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-01-31 08:23:26,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:26,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-01-31 08:23:26,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:26,677 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-31 08:23:26,678 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:23:26,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098514600] [2022-01-31 08:23:26,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098514600] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:23:26,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869223740] [2022-01-31 08:23:26,678 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 08:23:26,678 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:23:26,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:23:26,679 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) [2022-01-31 08:23:26,708 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-31 08:23:26,795 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 08:23:26,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:23:26,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-31 08:23:26,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:23:27,060 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-31 08:23:27,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:23:27,370 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-31 08:23:27,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869223740] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:23:27,370 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:23:27,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 39 [2022-01-31 08:23:27,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9812817] [2022-01-31 08:23:27,371 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:23:27,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-31 08:23:27,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:23:27,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-31 08:23:27,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=583, Invalid=899, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 08:23:27,373 INFO L87 Difference]: Start difference. First operand 85 states and 95 transitions. Second operand has 39 states, 39 states have (on average 2.6666666666666665) internal successors, (104), 37 states have internal predecessors, (104), 4 states have call successors, (10), 6 states have call predecessors, (10), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-31 08:23:28,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:23:28,507 INFO L93 Difference]: Finished difference Result 314 states and 365 transitions. [2022-01-31 08:23:28,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-31 08:23:28,508 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.6666666666666665) internal successors, (104), 37 states have internal predecessors, (104), 4 states have call successors, (10), 6 states have call predecessors, (10), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 60 [2022-01-31 08:23:28,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:23:28,510 INFO L225 Difference]: With dead ends: 314 [2022-01-31 08:23:28,510 INFO L226 Difference]: Without dead ends: 314 [2022-01-31 08:23:28,511 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1198 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1353, Invalid=2937, Unknown=0, NotChecked=0, Total=4290 [2022-01-31 08:23:28,512 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 765 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 694 mSolverCounterSat, 438 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 765 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 1132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 438 IncrementalHoareTripleChecker+Valid, 694 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 08:23:28,512 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [765 Valid, 39 Invalid, 1132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [438 Valid, 694 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 08:23:28,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2022-01-31 08:23:28,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 109. [2022-01-31 08:23:28,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 96 states have (on average 1.1041666666666667) internal successors, (106), 98 states have internal predecessors, (106), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-31 08:23:28,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 119 transitions. [2022-01-31 08:23:28,520 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 119 transitions. Word has length 60 [2022-01-31 08:23:28,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:23:28,521 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 119 transitions. [2022-01-31 08:23:28,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.6666666666666665) internal successors, (104), 37 states have internal predecessors, (104), 4 states have call successors, (10), 6 states have call predecessors, (10), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-31 08:23:28,521 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 119 transitions. [2022-01-31 08:23:28,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-01-31 08:23:28,522 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:23:28,522 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:23:28,548 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-31 08:23:28,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:23:28,746 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:23:28,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:23:28,747 INFO L85 PathProgramCache]: Analyzing trace with hash -1938943273, now seen corresponding path program 3 times [2022-01-31 08:23:28,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:23:28,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209383579] [2022-01-31 08:23:28,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:23:28,747 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:23:28,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:29,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:23:29,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:29,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-01-31 08:23:29,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:29,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-01-31 08:23:29,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:29,168 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-31 08:23:29,169 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:23:29,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209383579] [2022-01-31 08:23:29,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209383579] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:23:29,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443748397] [2022-01-31 08:23:29,169 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 08:23:29,169 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:23:29,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:23:29,170 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) [2022-01-31 08:23:29,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-31 08:23:29,274 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-31 08:23:29,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:23:29,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-31 08:23:29,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:23:29,468 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 489 trivial. 0 not checked. [2022-01-31 08:23:29,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:23:29,654 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 489 trivial. 0 not checked. [2022-01-31 08:23:29,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443748397] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:23:29,654 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:23:29,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 5, 5] total 33 [2022-01-31 08:23:29,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457723423] [2022-01-31 08:23:29,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:23:29,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-31 08:23:29,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:23:29,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-31 08:23:29,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=727, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 08:23:29,657 INFO L87 Difference]: Start difference. First operand 109 states and 119 transitions. Second operand has 33 states, 33 states have (on average 3.212121212121212) internal successors, (106), 31 states have internal predecessors, (106), 6 states have call successors, (11), 6 states have call predecessors, (11), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-01-31 08:23:30,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:23:30,976 INFO L93 Difference]: Finished difference Result 359 states and 425 transitions. [2022-01-31 08:23:30,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-31 08:23:30,976 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.212121212121212) internal successors, (106), 31 states have internal predecessors, (106), 6 states have call successors, (11), 6 states have call predecessors, (11), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 84 [2022-01-31 08:23:30,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:23:30,978 INFO L225 Difference]: With dead ends: 359 [2022-01-31 08:23:30,978 INFO L226 Difference]: Without dead ends: 359 [2022-01-31 08:23:30,980 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 709 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1115, Invalid=3045, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 08:23:30,981 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 805 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 815 mSolverCounterSat, 461 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 805 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 1276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 461 IncrementalHoareTripleChecker+Valid, 815 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 08:23:30,981 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [805 Valid, 39 Invalid, 1276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [461 Valid, 815 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 08:23:30,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2022-01-31 08:23:30,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 135. [2022-01-31 08:23:30,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 117 states have (on average 1.1025641025641026) internal successors, (129), 116 states have internal predecessors, (129), 11 states have call successors, (11), 5 states have call predecessors, (11), 6 states have return successors, (16), 13 states have call predecessors, (16), 10 states have call successors, (16) [2022-01-31 08:23:30,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 156 transitions. [2022-01-31 08:23:30,989 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 156 transitions. Word has length 84 [2022-01-31 08:23:30,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:23:30,990 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 156 transitions. [2022-01-31 08:23:30,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.212121212121212) internal successors, (106), 31 states have internal predecessors, (106), 6 states have call successors, (11), 6 states have call predecessors, (11), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-01-31 08:23:30,990 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 156 transitions. [2022-01-31 08:23:30,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-01-31 08:23:30,991 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:23:30,991 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:23:31,012 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-31 08:23:31,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:23:31,207 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:23:31,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:23:31,208 INFO L85 PathProgramCache]: Analyzing trace with hash 1892214525, now seen corresponding path program 1 times [2022-01-31 08:23:31,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:23:31,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937022615] [2022-01-31 08:23:31,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:23:31,208 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:23:31,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:31,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:23:31,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:31,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-01-31 08:23:31,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:31,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-01-31 08:23:31,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:31,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-01-31 08:23:31,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:31,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-01-31 08:23:31,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:31,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-01-31 08:23:31,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:31,683 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-01-31 08:23:31,683 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:23:31,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937022615] [2022-01-31 08:23:31,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937022615] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:23:31,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034529671] [2022-01-31 08:23:31,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:23:31,684 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:23:31,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:23:31,685 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) [2022-01-31 08:23:31,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-31 08:23:31,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:31,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 705 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-31 08:23:31,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:23:32,542 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-01-31 08:23:32,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:23:33,408 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-01-31 08:23:33,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034529671] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:23:33,408 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:23:33,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 27, 27] total 78 [2022-01-31 08:23:33,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352682052] [2022-01-31 08:23:33,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:23:33,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-01-31 08:23:33,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:23:33,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-01-31 08:23:33,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2507, Invalid=3499, Unknown=0, NotChecked=0, Total=6006 [2022-01-31 08:23:33,413 INFO L87 Difference]: Start difference. First operand 135 states and 156 transitions. Second operand has 78 states, 78 states have (on average 2.3974358974358974) internal successors, (187), 76 states have internal predecessors, (187), 4 states have call successors, (10), 6 states have call predecessors, (10), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-31 08:23:36,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:23:36,208 INFO L93 Difference]: Finished difference Result 650 states and 764 transitions. [2022-01-31 08:23:36,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-31 08:23:36,208 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 2.3974358974358974) internal successors, (187), 76 states have internal predecessors, (187), 4 states have call successors, (10), 6 states have call predecessors, (10), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 116 [2022-01-31 08:23:36,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:23:36,214 INFO L225 Difference]: With dead ends: 650 [2022-01-31 08:23:36,214 INFO L226 Difference]: Without dead ends: 650 [2022-01-31 08:23:36,217 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5111 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=5552, Invalid=11478, Unknown=0, NotChecked=0, Total=17030 [2022-01-31 08:23:36,218 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 2102 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 1130 mSolverCounterSat, 1183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2102 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 2313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1183 IncrementalHoareTripleChecker+Valid, 1130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 08:23:36,218 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2102 Valid, 39 Invalid, 2313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1183 Valid, 1130 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 08:23:36,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2022-01-31 08:23:36,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 185. [2022-01-31 08:23:36,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 167 states have (on average 1.0718562874251496) internal successors, (179), 166 states have internal predecessors, (179), 11 states have call successors, (11), 5 states have call predecessors, (11), 6 states have return successors, (16), 13 states have call predecessors, (16), 10 states have call successors, (16) [2022-01-31 08:23:36,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 206 transitions. [2022-01-31 08:23:36,233 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 206 transitions. Word has length 116 [2022-01-31 08:23:36,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:23:36,233 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 206 transitions. [2022-01-31 08:23:36,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 2.3974358974358974) internal successors, (187), 76 states have internal predecessors, (187), 4 states have call successors, (10), 6 states have call predecessors, (10), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-31 08:23:36,234 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 206 transitions. [2022-01-31 08:23:36,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2022-01-31 08:23:36,235 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:23:36,235 INFO L514 BasicCegarLoop]: trace histogram [48, 48, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:23:36,258 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-01-31 08:23:36,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-01-31 08:23:36,443 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:23:36,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:23:36,444 INFO L85 PathProgramCache]: Analyzing trace with hash 219420079, now seen corresponding path program 2 times [2022-01-31 08:23:36,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:23:36,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628928335] [2022-01-31 08:23:36,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:23:36,444 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:23:36,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:37,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:23:37,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:37,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-01-31 08:23:37,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:37,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2022-01-31 08:23:37,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:37,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-01-31 08:23:37,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:37,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2022-01-31 08:23:37,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:37,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2022-01-31 08:23:37,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:37,570 INFO L134 CoverageAnalysis]: Checked inductivity of 2370 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-01-31 08:23:37,570 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:23:37,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628928335] [2022-01-31 08:23:37,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628928335] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:23:37,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982431340] [2022-01-31 08:23:37,570 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 08:23:37,571 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:23:37,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:23:37,576 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) [2022-01-31 08:23:37,577 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-31 08:23:37,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 08:23:37,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:23:37,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 1130 conjuncts, 51 conjunts are in the unsatisfiable core [2022-01-31 08:23:37,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:23:39,416 INFO L134 CoverageAnalysis]: Checked inductivity of 2370 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-01-31 08:23:39,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:23:42,034 INFO L134 CoverageAnalysis]: Checked inductivity of 2370 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-01-31 08:23:42,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982431340] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:23:42,034 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:23:42,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 52, 52] total 153 [2022-01-31 08:23:42,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120669085] [2022-01-31 08:23:42,035 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:23:42,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 153 states [2022-01-31 08:23:42,035 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:23:42,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 153 interpolants. [2022-01-31 08:23:42,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10007, Invalid=13249, Unknown=0, NotChecked=0, Total=23256 [2022-01-31 08:23:42,043 INFO L87 Difference]: Start difference. First operand 185 states and 206 transitions. Second operand has 153 states, 153 states have (on average 2.2026143790849675) internal successors, (337), 151 states have internal predecessors, (337), 4 states have call successors, (10), 6 states have call predecessors, (10), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-31 08:23:50,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:23:50,998 INFO L93 Difference]: Finished difference Result 1250 states and 1464 transitions. [2022-01-31 08:23:50,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-01-31 08:23:50,999 INFO L78 Accepts]: Start accepts. Automaton has has 153 states, 153 states have (on average 2.2026143790849675) internal successors, (337), 151 states have internal predecessors, (337), 4 states have call successors, (10), 6 states have call predecessors, (10), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 166 [2022-01-31 08:23:50,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:23:51,004 INFO L225 Difference]: With dead ends: 1250 [2022-01-31 08:23:51,004 INFO L226 Difference]: Without dead ends: 1250 [2022-01-31 08:23:51,010 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 499 GetRequests, 245 SyntacticMatches, 0 SemanticMatches, 254 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20236 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=21702, Invalid=43578, Unknown=0, NotChecked=0, Total=65280 [2022-01-31 08:23:51,011 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 3971 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2328 mSolverCounterSat, 2251 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3971 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 4579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2251 IncrementalHoareTripleChecker+Valid, 2328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-01-31 08:23:51,011 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3971 Valid, 39 Invalid, 4579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2251 Valid, 2328 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-01-31 08:23:51,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1250 states. [2022-01-31 08:23:51,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1250 to 285. [2022-01-31 08:23:51,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 267 states have (on average 1.0449438202247192) internal successors, (279), 266 states have internal predecessors, (279), 11 states have call successors, (11), 5 states have call predecessors, (11), 6 states have return successors, (16), 13 states have call predecessors, (16), 10 states have call successors, (16) [2022-01-31 08:23:51,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 306 transitions. [2022-01-31 08:23:51,040 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 306 transitions. Word has length 166 [2022-01-31 08:23:51,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:23:51,041 INFO L470 AbstractCegarLoop]: Abstraction has 285 states and 306 transitions. [2022-01-31 08:23:51,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 153 states, 153 states have (on average 2.2026143790849675) internal successors, (337), 151 states have internal predecessors, (337), 4 states have call successors, (10), 6 states have call predecessors, (10), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-31 08:23:51,041 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 306 transitions. [2022-01-31 08:23:51,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-01-31 08:23:51,046 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:23:51,046 INFO L514 BasicCegarLoop]: trace histogram [98, 98, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:23:51,079 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-31 08:23:51,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:23:51,271 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:23:51,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:23:51,272 INFO L85 PathProgramCache]: Analyzing trace with hash 48832915, now seen corresponding path program 3 times [2022-01-31 08:23:51,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:23:51,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349256476] [2022-01-31 08:23:51,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:23:51,272 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:23:51,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:55,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:23:55,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:55,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 205 [2022-01-31 08:23:55,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:55,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 213 [2022-01-31 08:23:55,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:55,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 220 [2022-01-31 08:23:55,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:55,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 230 [2022-01-31 08:23:55,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:55,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 240 [2022-01-31 08:23:55,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:55,179 INFO L134 CoverageAnalysis]: Checked inductivity of 9670 backedges. 0 proven. 9604 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-01-31 08:23:55,179 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:23:55,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349256476] [2022-01-31 08:23:55,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349256476] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:23:55,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560569513] [2022-01-31 08:23:55,180 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 08:23:55,180 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:23:55,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:23:55,184 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) [2022-01-31 08:23:55,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-31 08:23:55,429 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-31 08:23:55,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:23:55,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-31 08:23:55,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:23:55,956 INFO L134 CoverageAnalysis]: Checked inductivity of 9670 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9665 trivial. 0 not checked. [2022-01-31 08:23:55,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:23:56,589 INFO L134 CoverageAnalysis]: Checked inductivity of 9670 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9665 trivial. 0 not checked. [2022-01-31 08:23:56,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560569513] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:23:56,589 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:23:56,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 6, 6] total 111 [2022-01-31 08:23:56,590 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178449325] [2022-01-31 08:23:56,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:23:56,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2022-01-31 08:23:56,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:23:56,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2022-01-31 08:23:56,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5482, Invalid=6728, Unknown=0, NotChecked=0, Total=12210 [2022-01-31 08:23:56,594 INFO L87 Difference]: Start difference. First operand 285 states and 306 transitions. Second operand has 111 states, 111 states have (on average 2.5675675675675675) internal successors, (285), 109 states have internal predecessors, (285), 4 states have call successors, (11), 6 states have call predecessors, (11), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2022-01-31 08:24:24,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:24:24,897 INFO L93 Difference]: Finished difference Result 2310 states and 2735 transitions. [2022-01-31 08:24:24,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 313 states. [2022-01-31 08:24:24,898 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 2.5675675675675675) internal successors, (285), 109 states have internal predecessors, (285), 4 states have call successors, (11), 6 states have call predecessors, (11), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 266 [2022-01-31 08:24:24,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:24:24,906 INFO L225 Difference]: With dead ends: 2310 [2022-01-31 08:24:24,906 INFO L226 Difference]: Without dead ends: 2310 [2022-01-31 08:24:24,917 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 956 GetRequests, 537 SyntacticMatches, 0 SemanticMatches, 419 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49307 ImplicationChecksByTransitivity, 20.0s TimeCoverageRelationStatistics Valid=54224, Invalid=122596, Unknown=0, NotChecked=0, Total=176820 [2022-01-31 08:24:24,918 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 7484 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 4012 mSolverCounterSat, 7735 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7484 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 11747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7735 IncrementalHoareTripleChecker+Valid, 4012 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-01-31 08:24:24,918 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7484 Valid, 40 Invalid, 11747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7735 Valid, 4012 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2022-01-31 08:24:24,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2310 states. [2022-01-31 08:24:24,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2310 to 788. [2022-01-31 08:24:25,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 788 states, 770 states have (on average 1.1454545454545455) internal successors, (882), 769 states have internal predecessors, (882), 11 states have call successors, (11), 5 states have call predecessors, (11), 6 states have return successors, (16), 13 states have call predecessors, (16), 10 states have call successors, (16) [2022-01-31 08:24:25,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 788 states to 788 states and 909 transitions. [2022-01-31 08:24:25,003 INFO L78 Accepts]: Start accepts. Automaton has 788 states and 909 transitions. Word has length 266 [2022-01-31 08:24:25,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:24:25,003 INFO L470 AbstractCegarLoop]: Abstraction has 788 states and 909 transitions. [2022-01-31 08:24:25,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 111 states have (on average 2.5675675675675675) internal successors, (285), 109 states have internal predecessors, (285), 4 states have call successors, (11), 6 states have call predecessors, (11), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2022-01-31 08:24:25,004 INFO L276 IsEmpty]: Start isEmpty. Operand 788 states and 909 transitions. [2022-01-31 08:24:25,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2022-01-31 08:24:25,006 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:24:25,007 INFO L514 BasicCegarLoop]: trace histogram [101, 101, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:24:25,030 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-01-31 08:24:25,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:24:25,227 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:24:25,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:24:25,227 INFO L85 PathProgramCache]: Analyzing trace with hash -1410797973, now seen corresponding path program 1 times [2022-01-31 08:24:25,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:24:25,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688757547] [2022-01-31 08:24:25,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:24:25,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:24:25,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:24:29,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:24:29,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:24:29,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 211 [2022-01-31 08:24:29,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:24:29,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 219 [2022-01-31 08:24:29,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:24:29,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 226 [2022-01-31 08:24:29,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:24:29,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 236 [2022-01-31 08:24:29,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:24:29,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 246 [2022-01-31 08:24:29,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:24:29,102 INFO L134 CoverageAnalysis]: Checked inductivity of 10275 backedges. 0 proven. 10201 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-01-31 08:24:29,102 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:24:29,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688757547] [2022-01-31 08:24:29,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688757547] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:24:29,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403041685] [2022-01-31 08:24:29,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:24:29,102 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:24:29,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:24:29,104 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) [2022-01-31 08:24:29,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-31 08:24:29,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:24:29,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 2045 conjuncts, 104 conjunts are in the unsatisfiable core [2022-01-31 08:24:29,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:24:34,201 INFO L134 CoverageAnalysis]: Checked inductivity of 10275 backedges. 0 proven. 10201 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-01-31 08:24:34,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:24:44,358 INFO L134 CoverageAnalysis]: Checked inductivity of 10275 backedges. 0 proven. 10201 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-01-31 08:24:44,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403041685] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:24:44,359 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:24:44,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 105, 105] total 312 [2022-01-31 08:24:44,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47749103] [2022-01-31 08:24:44,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:24:44,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 312 states [2022-01-31 08:24:44,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:24:44,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 312 interpolants. [2022-01-31 08:24:44,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42443, Invalid=54589, Unknown=0, NotChecked=0, Total=97032 [2022-01-31 08:24:44,368 INFO L87 Difference]: Start difference. First operand 788 states and 909 transitions. Second operand has 312 states, 312 states have (on average 2.105769230769231) internal successors, (657), 310 states have internal predecessors, (657), 4 states have call successors, (10), 6 states have call predecessors, (10), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-31 08:25:48,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:25:48,325 INFO L93 Difference]: Finished difference Result 2717 states and 3143 transitions. [2022-01-31 08:25:48,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 212 states. [2022-01-31 08:25:48,326 INFO L78 Accepts]: Start accepts. Automaton has has 312 states, 312 states have (on average 2.105769230769231) internal successors, (657), 310 states have internal predecessors, (657), 4 states have call successors, (10), 6 states have call predecessors, (10), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 277 [2022-01-31 08:25:48,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:25:48,334 INFO L225 Difference]: With dead ends: 2717 [2022-01-31 08:25:48,334 INFO L226 Difference]: Without dead ends: 2717 [2022-01-31 08:25:48,351 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 880 GetRequests, 361 SyntacticMatches, 0 SemanticMatches, 519 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85373 ImplicationChecksByTransitivity, 31.6s TimeCoverageRelationStatistics Valid=91079, Invalid=179841, Unknown=0, NotChecked=0, Total=270920 [2022-01-31 08:25:48,352 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 10687 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 4249 mSolverCounterSat, 6207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10687 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 10456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6207 IncrementalHoareTripleChecker+Valid, 4249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-01-31 08:25:48,352 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10687 Valid, 40 Invalid, 10456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6207 Valid, 4249 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2022-01-31 08:25:48,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2717 states. [2022-01-31 08:25:48,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2717 to 994. [2022-01-31 08:25:48,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 994 states, 976 states have (on average 1.1147540983606556) internal successors, (1088), 975 states have internal predecessors, (1088), 11 states have call successors, (11), 5 states have call predecessors, (11), 6 states have return successors, (16), 13 states have call predecessors, (16), 10 states have call successors, (16) [2022-01-31 08:25:48,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 994 states to 994 states and 1115 transitions. [2022-01-31 08:25:48,398 INFO L78 Accepts]: Start accepts. Automaton has 994 states and 1115 transitions. Word has length 277 [2022-01-31 08:25:48,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:25:48,398 INFO L470 AbstractCegarLoop]: Abstraction has 994 states and 1115 transitions. [2022-01-31 08:25:48,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 312 states, 312 states have (on average 2.105769230769231) internal successors, (657), 310 states have internal predecessors, (657), 4 states have call successors, (10), 6 states have call predecessors, (10), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-31 08:25:48,399 INFO L276 IsEmpty]: Start isEmpty. Operand 994 states and 1115 transitions. [2022-01-31 08:25:48,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 484 [2022-01-31 08:25:48,405 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:25:48,406 INFO L514 BasicCegarLoop]: trace histogram [204, 204, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:25:48,435 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-31 08:25:48,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-01-31 08:25:48,616 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:25:48,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:25:48,616 INFO L85 PathProgramCache]: Analyzing trace with hash 579092061, now seen corresponding path program 2 times [2022-01-31 08:25:48,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:25:48,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505099602] [2022-01-31 08:25:48,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:25:48,617 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:25:49,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:26:02,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:26:02,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:26:02,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 417 [2022-01-31 08:26:02,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:26:02,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 425 [2022-01-31 08:26:02,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:26:02,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 432 [2022-01-31 08:26:02,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:26:02,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 442 [2022-01-31 08:26:02,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:26:02,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 452 [2022-01-31 08:26:02,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:26:02,668 INFO L134 CoverageAnalysis]: Checked inductivity of 41690 backedges. 0 proven. 41616 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-01-31 08:26:02,668 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:26:02,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505099602] [2022-01-31 08:26:02,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505099602] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:26:02,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276331108] [2022-01-31 08:26:02,669 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 08:26:02,669 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:26:02,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:26:02,672 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:26:02,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-31 08:26:03,422 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 08:26:03,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:26:03,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 3796 conjuncts, 207 conjunts are in the unsatisfiable core [2022-01-31 08:26:03,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:26:19,145 INFO L134 CoverageAnalysis]: Checked inductivity of 41690 backedges. 0 proven. 41616 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-01-31 08:26:19,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:26:59,109 INFO L134 CoverageAnalysis]: Checked inductivity of 41690 backedges. 0 proven. 41616 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-01-31 08:26:59,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276331108] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:26:59,110 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:26:59,110 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [210, 208, 208] total 621 [2022-01-31 08:26:59,110 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809089320] [2022-01-31 08:26:59,110 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:26:59,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 621 states [2022-01-31 08:26:59,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:26:59,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 621 interpolants. [2022-01-31 08:26:59,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169751, Invalid=215269, Unknown=0, NotChecked=0, Total=385020 [2022-01-31 08:26:59,156 INFO L87 Difference]: Start difference. First operand 994 states and 1115 transitions. Second operand has 621 states, 621 states have (on average 2.0531400966183573) internal successors, (1275), 619 states have internal predecessors, (1275), 4 states have call successors, (10), 6 states have call predecessors, (10), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6)