/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-lopstr16/partial_lesser_bound-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 10:51:08,394 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 10:51:08,396 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 10:51:08,450 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-31 10:51:08,451 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-31 10:51:08,462 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-31 10:51:08,462 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-31 10:51:08,463 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-31 10:51:08,464 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-31 10:51:08,465 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-31 10:51:08,465 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-31 10:51:08,467 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-31 10:51:08,467 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 10:51:08,471 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 10:51:08,472 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 10:51:08,472 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 10:51:08,473 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 10:51:08,473 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 10:51:08,474 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 10:51:08,475 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 10:51:08,476 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 10:51:08,478 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 10:51:08,479 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 10:51:08,479 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 10:51:08,481 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 10:51:08,485 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 10:51:08,485 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 10:51:08,486 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 10:51:08,486 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-01-31 10:51:08,493 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 10:51:08,493 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 10:51:08,493 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 10:51:08,494 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 10:51:08,494 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 10:51:08,494 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 10:51:08,494 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 10:51:08,494 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 10:51:08,494 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 10:51:08,494 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 10:51:08,494 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 10:51:08,495 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 10:51:08,495 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 10:51:08,495 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 10:51:08,495 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 10:51:08,495 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 10:51:08,495 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 10:51:08,495 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 10:51:08,495 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 10:51:08,496 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 10:51:08,496 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 10:51:08,496 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-31 10:51:08,496 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 10:51:08,672 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 10:51:08,701 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 10:51:08,703 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 10:51:08,704 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 10:51:08,712 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 10:51:08,713 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-lopstr16/partial_lesser_bound-1.i [2022-01-31 10:51:08,761 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7b29b4231/179e3f18e1f4427293a6fa82ec832993/FLAGf9640332a [2022-01-31 10:51:09,067 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 10:51:09,067 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-lopstr16/partial_lesser_bound-1.i [2022-01-31 10:51:09,074 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7b29b4231/179e3f18e1f4427293a6fa82ec832993/FLAGf9640332a [2022-01-31 10:51:09,492 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7b29b4231/179e3f18e1f4427293a6fa82ec832993 [2022-01-31 10:51:09,494 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 10:51:09,495 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-31 10:51:09,503 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 10:51:09,503 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 10:51:09,505 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 10:51:09,505 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 10:51:09" (1/1) ... [2022-01-31 10:51:09,506 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@220c9225 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:51:09, skipping insertion in model container [2022-01-31 10:51:09,506 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 10:51:09" (1/1) ... [2022-01-31 10:51:09,511 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 10:51:09,522 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 10:51:09,616 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-lopstr16/partial_lesser_bound-1.i[822,835] [2022-01-31 10:51:09,648 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 10:51:09,656 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 10:51:09,665 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-lopstr16/partial_lesser_bound-1.i[822,835] [2022-01-31 10:51:09,672 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 10:51:09,682 INFO L208 MainTranslator]: Completed translation [2022-01-31 10:51:09,682 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:51:09 WrapperNode [2022-01-31 10:51:09,682 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 10:51:09,683 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 10:51:09,683 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 10:51:09,683 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 10:51:09,689 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:51:09" (1/1) ... [2022-01-31 10:51:09,689 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:51:09" (1/1) ... [2022-01-31 10:51:09,694 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:51:09" (1/1) ... [2022-01-31 10:51:09,694 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:51:09" (1/1) ... [2022-01-31 10:51:09,707 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:51:09" (1/1) ... [2022-01-31 10:51:09,710 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:51:09" (1/1) ... [2022-01-31 10:51:09,714 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:51:09" (1/1) ... [2022-01-31 10:51:09,717 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 10:51:09,718 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 10:51:09,718 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 10:51:09,718 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 10:51:09,719 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:51:09" (1/1) ... [2022-01-31 10:51:09,724 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 10:51:09,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:51:09,759 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 10:51:09,760 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 10:51:09,782 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 10:51:09,783 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 10:51:09,783 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 10:51:09,783 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 10:51:09,783 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 10:51:09,783 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 10:51:09,783 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 10:51:09,783 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-01-31 10:51:09,783 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-01-31 10:51:09,783 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 10:51:09,783 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 10:51:09,783 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 10:51:09,783 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 10:51:09,783 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 10:51:09,784 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 10:51:09,784 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 10:51:09,784 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 10:51:09,784 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 10:51:09,784 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 10:51:09,852 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 10:51:09,854 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 10:51:09,967 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 10:51:09,971 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 10:51:09,971 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-01-31 10:51:09,972 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 10:51:09 BoogieIcfgContainer [2022-01-31 10:51:09,972 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 10:51:09,973 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-31 10:51:09,973 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-31 10:51:09,974 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-31 10:51:09,976 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 10:51:09" (1/1) ... [2022-01-31 10:51:10,001 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 10:51:10 BasicIcfg [2022-01-31 10:51:10,002 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-31 10:51:10,003 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 10:51:10,003 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 10:51:10,006 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 10:51:10,006 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 10:51:09" (1/4) ... [2022-01-31 10:51:10,007 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d74973f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 10:51:10, skipping insertion in model container [2022-01-31 10:51:10,007 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:51:09" (2/4) ... [2022-01-31 10:51:10,007 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d74973f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 10:51:10, skipping insertion in model container [2022-01-31 10:51:10,007 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 10:51:09" (3/4) ... [2022-01-31 10:51:10,007 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d74973f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 10:51:10, skipping insertion in model container [2022-01-31 10:51:10,007 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 10:51:10" (4/4) ... [2022-01-31 10:51:10,008 INFO L111 eAbstractionObserver]: Analyzing ICFG partial_lesser_bound-1.iJordan [2022-01-31 10:51:10,012 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-01-31 10:51:10,012 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 10:51:10,057 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 10:51:10,062 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 10:51:10,062 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 10:51:10,070 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 20 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 10:51:10,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-31 10:51:10,075 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:51:10,076 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:51:10,076 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:51:10,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:51:10,080 INFO L85 PathProgramCache]: Analyzing trace with hash -839270659, now seen corresponding path program 1 times [2022-01-31 10:51:10,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:51:10,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639868405] [2022-01-31 10:51:10,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:51:10,089 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:51:10,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:51:10,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:51:10,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:51:10,286 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 10:51:10,286 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:51:10,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639868405] [2022-01-31 10:51:10,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639868405] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 10:51:10,289 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 10:51:10,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 10:51:10,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191914789] [2022-01-31 10:51:10,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 10:51:10,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 10:51:10,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:51:10,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 10:51:10,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 10:51:10,318 INFO L87 Difference]: Start difference. First operand has 27 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 20 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 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 10:51:10,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:51:10,366 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2022-01-31 10:51:10,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 10:51:10,368 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 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 15 [2022-01-31 10:51:10,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:51:10,374 INFO L225 Difference]: With dead ends: 27 [2022-01-31 10:51:10,375 INFO L226 Difference]: Without dead ends: 22 [2022-01-31 10:51:10,376 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 10:51:10,380 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 5 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 10:51:10,381 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 32 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 10:51:10,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-01-31 10:51:10,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-01-31 10:51:10,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 10:51:10,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2022-01-31 10:51:10,402 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 15 [2022-01-31 10:51:10,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:51:10,403 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2022-01-31 10:51:10,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 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 10:51:10,403 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2022-01-31 10:51:10,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-31 10:51:10,404 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:51:10,404 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:51:10,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 10:51:10,404 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:51:10,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:51:10,409 INFO L85 PathProgramCache]: Analyzing trace with hash -1759221441, now seen corresponding path program 1 times [2022-01-31 10:51:10,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:51:10,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598368525] [2022-01-31 10:51:10,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:51:10,410 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:51:10,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:51:10,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:51:10,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:51:10,509 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 10:51:10,509 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:51:10,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598368525] [2022-01-31 10:51:10,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598368525] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 10:51:10,509 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 10:51:10,509 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 10:51:10,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347521297] [2022-01-31 10:51:10,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 10:51:10,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 10:51:10,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:51:10,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 10:51:10,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 10:51:10,512 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 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 10:51:10,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:51:10,590 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2022-01-31 10:51:10,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 10:51:10,590 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 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 15 [2022-01-31 10:51:10,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:51:10,592 INFO L225 Difference]: With dead ends: 36 [2022-01-31 10:51:10,592 INFO L226 Difference]: Without dead ends: 36 [2022-01-31 10:51:10,592 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-31 10:51:10,593 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 22 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 10:51:10,593 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 21 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 10:51:10,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-01-31 10:51:10,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 24. [2022-01-31 10:51:10,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 10:51:10,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2022-01-31 10:51:10,601 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 15 [2022-01-31 10:51:10,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:51:10,601 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2022-01-31 10:51:10,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 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 10:51:10,601 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2022-01-31 10:51:10,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-31 10:51:10,603 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:51:10,604 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:51:10,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 10:51:10,608 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:51:10,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:51:10,609 INFO L85 PathProgramCache]: Analyzing trace with hash 852859995, now seen corresponding path program 1 times [2022-01-31 10:51:10,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:51:10,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371961159] [2022-01-31 10:51:10,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:51:10,610 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:51:10,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:51:10,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:51:10,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:51:10,688 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 10:51:10,688 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:51:10,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371961159] [2022-01-31 10:51:10,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371961159] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:51:10,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144316402] [2022-01-31 10:51:10,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:51:10,689 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:51:10,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:51:10,692 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 10:51:10,694 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 10:51:10,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:51:10,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-31 10:51:10,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:51:10,818 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 10:51:10,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:51:10,877 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 10:51:10,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144316402] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:51:10,877 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:51:10,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-01-31 10:51:10,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460927485] [2022-01-31 10:51:10,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:51:10,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 10:51:10,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:51:10,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 10:51:10,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-31 10:51:10,881 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:51:11,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:51:11,004 INFO L93 Difference]: Finished difference Result 56 states and 59 transitions. [2022-01-31 10:51:11,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 10:51:11,005 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-01-31 10:51:11,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:51:11,007 INFO L225 Difference]: With dead ends: 56 [2022-01-31 10:51:11,007 INFO L226 Difference]: Without dead ends: 56 [2022-01-31 10:51:11,008 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2022-01-31 10:51:11,010 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 79 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 10:51:11,011 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 20 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 10:51:11,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-01-31 10:51:11,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 32. [2022-01-31 10:51:11,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 10:51:11,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2022-01-31 10:51:11,017 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 19 [2022-01-31 10:51:11,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:51:11,018 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2022-01-31 10:51:11,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:51:11,018 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2022-01-31 10:51:11,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-31 10:51:11,019 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:51:11,019 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:51:11,039 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 10:51:11,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:51:11,232 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:51:11,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:51:11,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1363317453, now seen corresponding path program 2 times [2022-01-31 10:51:11,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:51:11,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539316193] [2022-01-31 10:51:11,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:51:11,233 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:51:11,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:51:11,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:51:11,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:51:11,340 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 10:51:11,340 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:51:11,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539316193] [2022-01-31 10:51:11,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539316193] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:51:11,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900848141] [2022-01-31 10:51:11,341 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 10:51:11,341 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:51:11,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:51:11,348 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 10:51:11,363 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 10:51:11,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 10:51:11,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:51:11,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-31 10:51:11,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:51:11,461 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-31 10:51:11,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:51:11,516 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-31 10:51:11,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900848141] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:51:11,517 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:51:11,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 12 [2022-01-31 10:51:11,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13645670] [2022-01-31 10:51:11,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:51:11,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 10:51:11,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:51:11,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 10:51:11,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2022-01-31 10:51:11,518 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:51:11,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:51:11,822 INFO L93 Difference]: Finished difference Result 124 states and 126 transitions. [2022-01-31 10:51:11,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 10:51:11,822 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-01-31 10:51:11,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:51:11,826 INFO L225 Difference]: With dead ends: 124 [2022-01-31 10:51:11,826 INFO L226 Difference]: Without dead ends: 124 [2022-01-31 10:51:11,827 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=146, Invalid=234, Unknown=0, NotChecked=0, Total=380 [2022-01-31 10:51:11,829 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 174 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 10:51:11,829 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 28 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 10:51:11,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-01-31 10:51:11,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 52. [2022-01-31 10:51:11,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 46 states have (on average 1.065217391304348) internal successors, (49), 46 states have internal predecessors, (49), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 10:51:11,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2022-01-31 10:51:11,838 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 27 [2022-01-31 10:51:11,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:51:11,838 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2022-01-31 10:51:11,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:51:11,838 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2022-01-31 10:51:11,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-31 10:51:11,839 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:51:11,839 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:51:11,858 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-31 10:51:12,059 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,SelfDestructingSolverStorable3 [2022-01-31 10:51:12,060 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:51:12,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:51:12,060 INFO L85 PathProgramCache]: Analyzing trace with hash -935749089, now seen corresponding path program 3 times [2022-01-31 10:51:12,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:51:12,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595517206] [2022-01-31 10:51:12,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:51:12,061 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:51:12,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:51:12,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:51:12,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:51:12,195 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-01-31 10:51:12,195 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:51:12,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595517206] [2022-01-31 10:51:12,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595517206] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:51:12,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619780146] [2022-01-31 10:51:12,196 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 10:51:12,196 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:51:12,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:51:12,197 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 10:51:12,198 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 10:51:12,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-01-31 10:51:12,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:51:12,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-31 10:51:12,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:51:12,410 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-01-31 10:51:12,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:51:12,568 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-01-31 10:51:12,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619780146] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:51:12,568 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:51:12,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 22 [2022-01-31 10:51:12,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659471951] [2022-01-31 10:51:12,568 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:51:12,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-31 10:51:12,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:51:12,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-31 10:51:12,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2022-01-31 10:51:12,569 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:51:12,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:51:12,889 INFO L93 Difference]: Finished difference Result 168 states and 171 transitions. [2022-01-31 10:51:12,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-31 10:51:12,889 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2022-01-31 10:51:12,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:51:12,890 INFO L225 Difference]: With dead ends: 168 [2022-01-31 10:51:12,890 INFO L226 Difference]: Without dead ends: 168 [2022-01-31 10:51:12,891 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=423, Invalid=569, Unknown=0, NotChecked=0, Total=992 [2022-01-31 10:51:12,891 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 319 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 10:51:12,891 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [329 Valid, 29 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 10:51:12,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-01-31 10:51:12,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 74. [2022-01-31 10:51:12,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 68 states have (on average 1.0441176470588236) internal successors, (71), 68 states have internal predecessors, (71), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 10:51:12,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2022-01-31 10:51:12,904 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 47 [2022-01-31 10:51:12,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:51:12,904 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2022-01-31 10:51:12,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:51:12,904 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2022-01-31 10:51:12,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-01-31 10:51:12,906 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:51:12,906 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:51:12,923 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 10:51:13,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:51:13,119 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:51:13,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:51:13,119 INFO L85 PathProgramCache]: Analyzing trace with hash -884847415, now seen corresponding path program 4 times [2022-01-31 10:51:13,119 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:51:13,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670644512] [2022-01-31 10:51:13,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:51:13,120 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:51:13,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:51:13,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:51:13,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:51:13,352 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-01-31 10:51:13,352 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:51:13,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670644512] [2022-01-31 10:51:13,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670644512] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:51:13,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391858972] [2022-01-31 10:51:13,352 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 10:51:13,353 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:51:13,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:51:13,355 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 10:51:13,356 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 10:51:13,419 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 10:51:13,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:51:13,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-31 10:51:13,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:51:13,518 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-01-31 10:51:13,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:51:14,077 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-01-31 10:51:14,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391858972] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:51:14,077 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:51:14,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 42 [2022-01-31 10:51:14,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405013388] [2022-01-31 10:51:14,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:51:14,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-31 10:51:14,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:51:14,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-31 10:51:14,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2022-01-31 10:51:14,079 INFO L87 Difference]: Start difference. First operand 74 states and 76 transitions. Second operand has 42 states, 42 states have (on average 2.1666666666666665) internal successors, (91), 41 states have internal predecessors, (91), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:51:14,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:51:14,852 INFO L93 Difference]: Finished difference Result 328 states and 331 transitions. [2022-01-31 10:51:14,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-01-31 10:51:14,852 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.1666666666666665) internal successors, (91), 41 states have internal predecessors, (91), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 69 [2022-01-31 10:51:14,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:51:14,853 INFO L225 Difference]: With dead ends: 328 [2022-01-31 10:51:14,854 INFO L226 Difference]: Without dead ends: 328 [2022-01-31 10:51:14,855 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1643, Invalid=2139, Unknown=0, NotChecked=0, Total=3782 [2022-01-31 10:51:14,855 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 973 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 429 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 993 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 837 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 429 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 10:51:14,855 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [993 Valid, 38 Invalid, 837 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [429 Valid, 408 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 10:51:14,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2022-01-31 10:51:14,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 134. [2022-01-31 10:51:14,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 128 states have (on average 1.0234375) internal successors, (131), 128 states have internal predecessors, (131), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 10:51:14,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 136 transitions. [2022-01-31 10:51:14,860 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 136 transitions. Word has length 69 [2022-01-31 10:51:14,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:51:14,860 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 136 transitions. [2022-01-31 10:51:14,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.1666666666666665) internal successors, (91), 41 states have internal predecessors, (91), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:51:14,860 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 136 transitions. [2022-01-31 10:51:14,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-01-31 10:51:14,861 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:51:14,861 INFO L514 BasicCegarLoop]: trace histogram [38, 38, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:51:14,880 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 10:51:15,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:51:15,071 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:51:15,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:51:15,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1847966093, now seen corresponding path program 5 times [2022-01-31 10:51:15,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:51:15,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610156252] [2022-01-31 10:51:15,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:51:15,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:51:15,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:51:15,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:51:15,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:51:15,698 INFO L134 CoverageAnalysis]: Checked inductivity of 1805 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2022-01-31 10:51:15,698 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:51:15,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610156252] [2022-01-31 10:51:15,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610156252] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:51:15,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927585431] [2022-01-31 10:51:15,698 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 10:51:15,698 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:51:15,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:51:15,699 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 10:51:15,700 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 10:58:47,561 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 39 check-sat command(s) [2022-01-31 10:58:47,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:58:47,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 40 conjunts are in the unsatisfiable core [2022-01-31 10:58:47,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:58:48,108 INFO L134 CoverageAnalysis]: Checked inductivity of 1805 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2022-01-31 10:58:48,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:58:49,726 INFO L134 CoverageAnalysis]: Checked inductivity of 1805 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2022-01-31 10:58:49,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927585431] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:58:49,727 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:58:49,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41, 41] total 82 [2022-01-31 10:58:49,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497958180] [2022-01-31 10:58:49,727 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:58:49,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-01-31 10:58:49,728 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:58:49,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-01-31 10:58:49,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3242, Invalid=3400, Unknown=0, NotChecked=0, Total=6642 [2022-01-31 10:58:49,731 INFO L87 Difference]: Start difference. First operand 134 states and 136 transitions. Second operand has 82 states, 82 states have (on average 2.0853658536585367) internal successors, (171), 81 states have internal predecessors, (171), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:58:52,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:58:52,175 INFO L93 Difference]: Finished difference Result 648 states and 651 transitions. [2022-01-31 10:58:52,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2022-01-31 10:58:52,176 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 2.0853658536585367) internal successors, (171), 81 states have internal predecessors, (171), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 129 [2022-01-31 10:58:52,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:58:52,178 INFO L225 Difference]: With dead ends: 648 [2022-01-31 10:58:52,178 INFO L226 Difference]: Without dead ends: 648 [2022-01-31 10:58:52,180 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 221 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1008 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=6483, Invalid=8279, Unknown=0, NotChecked=0, Total=14762 [2022-01-31 10:58:52,181 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 2203 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 774 mSolverCounterSat, 994 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2243 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 1768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 994 IncrementalHoareTripleChecker+Valid, 774 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 10:58:52,181 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2243 Valid, 60 Invalid, 1768 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [994 Valid, 774 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 10:58:52,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 648 states. [2022-01-31 10:58:52,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 648 to 254. [2022-01-31 10:58:52,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 248 states have (on average 1.0120967741935485) internal successors, (251), 248 states have internal predecessors, (251), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 10:58:52,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 256 transitions. [2022-01-31 10:58:52,192 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 256 transitions. Word has length 129 [2022-01-31 10:58:52,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:58:52,192 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 256 transitions. [2022-01-31 10:58:52,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 2.0853658536585367) internal successors, (171), 81 states have internal predecessors, (171), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:58:52,192 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 256 transitions. [2022-01-31 10:58:52,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2022-01-31 10:58:52,194 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:58:52,194 INFO L514 BasicCegarLoop]: trace histogram [78, 78, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:58:52,281 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-31 10:58:52,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:58:52,397 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:58:52,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:58:52,397 INFO L85 PathProgramCache]: Analyzing trace with hash -340625131, now seen corresponding path program 6 times [2022-01-31 10:58:52,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:58:52,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764966358] [2022-01-31 10:58:52,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:58:52,398 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:58:52,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:58:54,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:58:54,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:58:54,422 INFO L134 CoverageAnalysis]: Checked inductivity of 7605 backedges. 0 proven. 6084 refuted. 0 times theorem prover too weak. 1521 trivial. 0 not checked. [2022-01-31 10:58:54,423 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:58:54,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764966358] [2022-01-31 10:58:54,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764966358] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:58:54,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260824825] [2022-01-31 10:58:54,423 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 10:58:54,423 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:58:54,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:58:54,424 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 10:58:54,425 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process