/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/loops/linear_sea.ch.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 04:30:08,649 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 04:30:08,650 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 04:30:08,671 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-04-06 04:30:08,671 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-04-06 04:30:08,672 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-04-06 04:30:08,673 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-04-06 04:30:08,674 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-04-06 04:30:08,676 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-04-06 04:30:08,676 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-04-06 04:30:08,677 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-04-06 04:30:08,677 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-04-06 04:30:08,678 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-06 04:30:08,678 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-06 04:30:08,679 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-06 04:30:08,680 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-06 04:30:08,680 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-06 04:30:08,681 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-06 04:30:08,682 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-06 04:30:08,687 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-06 04:30:08,688 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-06 04:30:08,688 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-06 04:30:08,689 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-06 04:30:08,690 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-06 04:30:08,690 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-06 04:30:08,692 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-06 04:30:08,696 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 04:30:08,697 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 04:30:08,697 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 04:30:08,698 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-04-06 04:30:08,704 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 04:30:08,704 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 04:30:08,705 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 04:30:08,705 INFO L138 SettingsManager]: * sizeof long=4 [2022-04-06 04:30:08,705 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 04:30:08,705 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-04-06 04:30:08,705 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 04:30:08,706 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 04:30:08,706 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 04:30:08,706 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 04:30:08,706 INFO L138 SettingsManager]: * sizeof long double=12 [2022-04-06 04:30:08,706 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 04:30:08,706 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 04:30:08,706 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 04:30:08,706 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 04:30:08,706 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 04:30:08,707 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 04:30:08,707 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 04:30:08,707 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 04:30:08,707 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 04:30:08,707 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-06 04:30:08,708 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-04-06 04:30:08,708 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 04:30:08,915 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 04:30:08,938 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 04:30:08,940 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 04:30:08,941 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 04:30:08,942 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 04:30:08,943 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/linear_sea.ch.c [2022-04-06 04:30:09,003 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/31fd0e4ab/1e45aef437cc41e595e77669db12b99b/FLAGe5f0d41bb [2022-04-06 04:30:09,390 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 04:30:09,390 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/linear_sea.ch.c [2022-04-06 04:30:09,396 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/31fd0e4ab/1e45aef437cc41e595e77669db12b99b/FLAGe5f0d41bb [2022-04-06 04:30:09,413 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/31fd0e4ab/1e45aef437cc41e595e77669db12b99b [2022-04-06 04:30:09,415 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 04:30:09,416 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-04-06 04:30:09,429 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 04:30:09,429 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 04:30:09,432 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 04:30:09,433 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 04:30:09" (1/1) ... [2022-04-06 04:30:09,433 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@399764c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:30:09, skipping insertion in model container [2022-04-06 04:30:09,434 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 04:30:09" (1/1) ... [2022-04-06 04:30:09,438 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 04:30:09,451 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 04:30:09,577 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/linear_sea.ch.c[383,396] [2022-04-06 04:30:09,609 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 04:30:09,617 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 04:30:09,626 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/linear_sea.ch.c[383,396] [2022-04-06 04:30:09,634 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 04:30:09,645 INFO L208 MainTranslator]: Completed translation [2022-04-06 04:30:09,645 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:30:09 WrapperNode [2022-04-06 04:30:09,646 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 04:30:09,646 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 04:30:09,646 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 04:30:09,646 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 04:30:09,654 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:30:09" (1/1) ... [2022-04-06 04:30:09,654 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:30:09" (1/1) ... [2022-04-06 04:30:09,667 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:30:09" (1/1) ... [2022-04-06 04:30:09,668 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:30:09" (1/1) ... [2022-04-06 04:30:09,686 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:30:09" (1/1) ... [2022-04-06 04:30:09,689 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:30:09" (1/1) ... [2022-04-06 04:30:09,690 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:30:09" (1/1) ... [2022-04-06 04:30:09,691 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 04:30:09,692 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 04:30:09,692 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 04:30:09,692 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 04:30:09,693 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:30:09" (1/1) ... [2022-04-06 04:30:09,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 04:30:09,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 04:30:09,734 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-04-06 04:30:09,760 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 [2022-04-06 04:30:09,770 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 04:30:09,771 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 04:30:09,771 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 04:30:09,771 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 04:30:09,772 INFO L138 BoogieDeclarations]: Found implementation of procedure linear_search [2022-04-06 04:30:09,772 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 04:30:09,772 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2022-04-06 04:30:09,772 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 04:30:09,772 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 04:30:09,772 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 04:30:09,772 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 04:30:09,772 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2022-04-06 04:30:09,773 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 04:30:09,773 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-04-06 04:30:09,773 INFO L130 BoogieDeclarations]: Found specification of procedure linear_search [2022-04-06 04:30:09,774 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 04:30:09,775 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 04:30:09,775 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-04-06 04:30:09,775 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2022-04-06 04:30:09,775 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 04:30:09,775 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 04:30:09,775 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 04:30:09,775 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 04:30:09,775 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 04:30:09,842 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 04:30:09,844 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 04:30:09,963 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 04:30:09,967 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 04:30:09,967 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-04-06 04:30:09,968 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 04:30:09 BoogieIcfgContainer [2022-04-06 04:30:09,968 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 04:30:09,969 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-04-06 04:30:09,969 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-04-06 04:30:09,970 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-04-06 04:30:09,972 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 04:30:09" (1/1) ... [2022-04-06 04:30:09,973 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_JORDAN [2022-04-06 04:30:09,993 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.04 04:30:09 BasicIcfg [2022-04-06 04:30:09,994 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-04-06 04:30:09,995 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 04:30:09,995 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 04:30:09,998 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 04:30:09,998 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 04:30:09" (1/4) ... [2022-04-06 04:30:09,999 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61920df7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 04:30:09, skipping insertion in model container [2022-04-06 04:30:09,999 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:30:09" (2/4) ... [2022-04-06 04:30:10,001 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61920df7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 04:30:09, skipping insertion in model container [2022-04-06 04:30:10,001 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 04:30:09" (3/4) ... [2022-04-06 04:30:10,002 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61920df7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.04 04:30:10, skipping insertion in model container [2022-04-06 04:30:10,002 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.04 04:30:09" (4/4) ... [2022-04-06 04:30:10,003 INFO L111 eAbstractionObserver]: Analyzing ICFG linear_sea.ch.cJordan [2022-04-06 04:30:10,009 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-04-06 04:30:10,009 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 04:30:10,038 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 04:30:10,042 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-04-06 04:30:10,043 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 04:30:10,056 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 22 states have internal predecessors, (28), 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) [2022-04-06 04:30:10,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-04-06 04:30:10,062 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 04:30:10,062 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 04:30:10,062 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 04:30:10,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 04:30:10,069 INFO L85 PathProgramCache]: Analyzing trace with hash -679551393, now seen corresponding path program 1 times [2022-04-06 04:30:10,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 04:30:10,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930352850] [2022-04-06 04:30:10,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 04:30:10,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 04:30:10,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:30:10,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 04:30:10,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:30:10,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 04:30:10,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:30:10,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 04:30:10,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:30:10,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 04:30:10,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 04:30:10,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930352850] [2022-04-06 04:30:10,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930352850] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 04:30:10,339 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 04:30:10,339 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 04:30:10,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949848030] [2022-04-06 04:30:10,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 04:30:10,343 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 04:30:10,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 04:30:10,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 04:30:10,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 04:30:10,366 INFO L87 Difference]: Start difference. First operand has 33 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 22 states have internal predecessors, (28), 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 4 states, 4 states have (on average 3.75) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 04:30:10,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 04:30:10,455 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2022-04-06 04:30:10,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 04:30:10,457 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2022-04-06 04:30:10,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 04:30:10,464 INFO L225 Difference]: With dead ends: 35 [2022-04-06 04:30:10,464 INFO L226 Difference]: Without dead ends: 26 [2022-04-06 04:30:10,466 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-06 04:30:10,469 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 34 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 04:30:10,470 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 37 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 04:30:10,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-04-06 04:30:10,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-04-06 04:30:10,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 04:30:10,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2022-04-06 04:30:10,490 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 23 [2022-04-06 04:30:10,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 04:30:10,491 INFO L478 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2022-04-06 04:30:10,491 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 04:30:10,491 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2022-04-06 04:30:10,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-04-06 04:30:10,492 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 04:30:10,492 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 04:30:10,492 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 04:30:10,492 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 04:30:10,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 04:30:10,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1069263323, now seen corresponding path program 1 times [2022-04-06 04:30:10,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 04:30:10,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650047632] [2022-04-06 04:30:10,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 04:30:10,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 04:30:10,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:30:10,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 04:30:10,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:30:10,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 04:30:10,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:30:10,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 04:30:10,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:30:10,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 04:30:10,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 04:30:10,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650047632] [2022-04-06 04:30:10,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650047632] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 04:30:10,671 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 04:30:10,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 04:30:10,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828375263] [2022-04-06 04:30:10,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 04:30:10,673 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 04:30:10,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 04:30:10,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 04:30:10,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-04-06 04:30:10,674 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 04:30:10,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 04:30:10,848 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2022-04-06 04:30:10,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 04:30:10,848 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 25 [2022-04-06 04:30:10,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 04:30:10,849 INFO L225 Difference]: With dead ends: 32 [2022-04-06 04:30:10,849 INFO L226 Difference]: Without dead ends: 26 [2022-04-06 04:30:10,849 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-04-06 04:30:10,850 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 33 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 04:30:10,851 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 45 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 04:30:10,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-04-06 04:30:10,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-04-06 04:30:10,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 04:30:10,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2022-04-06 04:30:10,853 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 25 [2022-04-06 04:30:10,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 04:30:10,854 INFO L478 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2022-04-06 04:30:10,854 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 04:30:10,854 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2022-04-06 04:30:10,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-04-06 04:30:10,855 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 04:30:10,855 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 04:30:10,855 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-06 04:30:10,855 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 04:30:10,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 04:30:10,856 INFO L85 PathProgramCache]: Analyzing trace with hash 673547012, now seen corresponding path program 1 times [2022-04-06 04:30:10,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 04:30:10,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570431497] [2022-04-06 04:30:10,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 04:30:10,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 04:30:10,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:30:10,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 04:30:10,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:30:10,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 04:30:10,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:30:10,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 04:30:10,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:30:11,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 04:30:11,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 04:30:11,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570431497] [2022-04-06 04:30:11,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570431497] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 04:30:11,103 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 04:30:11,103 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 04:30:11,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186078633] [2022-04-06 04:30:11,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 04:30:11,104 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 04:30:11,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 04:30:11,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 04:30:11,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-04-06 04:30:11,104 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 04:30:13,242 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-04-06 04:30:13,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 04:30:13,515 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2022-04-06 04:30:13,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 04:30:13,516 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2022-04-06 04:30:13,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 04:30:13,517 INFO L225 Difference]: With dead ends: 31 [2022-04-06 04:30:13,517 INFO L226 Difference]: Without dead ends: 30 [2022-04-06 04:30:13,518 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2022-04-06 04:30:13,518 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 59 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 20 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-04-06 04:30:13,518 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 36 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 83 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-04-06 04:30:13,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-04-06 04:30:13,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2022-04-06 04:30:13,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 04:30:13,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2022-04-06 04:30:13,522 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 25 [2022-04-06 04:30:13,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 04:30:13,522 INFO L478 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2022-04-06 04:30:13,522 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 04:30:13,522 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2022-04-06 04:30:13,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-04-06 04:30:13,523 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 04:30:13,523 INFO L499 BasicCegarLoop]: trace histogram [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] [2022-04-06 04:30:13,523 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-04-06 04:30:13,523 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 04:30:13,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 04:30:13,523 INFO L85 PathProgramCache]: Analyzing trace with hash -977632473, now seen corresponding path program 1 times [2022-04-06 04:30:13,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 04:30:13,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846231077] [2022-04-06 04:30:13,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 04:30:13,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 04:30:13,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:30:13,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 04:30:13,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:30:13,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 04:30:13,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:30:13,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 04:30:13,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:30:13,717 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 04:30:13,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 04:30:13,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846231077] [2022-04-06 04:30:13,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846231077] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 04:30:13,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202836838] [2022-04-06 04:30:13,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 04:30:13,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 04:30:13,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 04:30:13,719 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 04:30:13,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process