/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/loops-crafted-1/Mono6_1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 22:15:17,649 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 22:15:17,650 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 22:15:17,679 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 22:15:17,680 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 22:15:17,683 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 22:15:17,686 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 22:15:17,688 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 22:15:17,690 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 22:15:17,695 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 22:15:17,696 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 22:15:17,698 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2023-04-02 22:15:17,723 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 22:15:17,723 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 22:15:17,724 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 22:15:17,725 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 22:15:17,726 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 22:15:17,726 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 22:15:17,726 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 22:15:17,727 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 22:15:17,727 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 22:15:17,727 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 22:15:17,728 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 22:15:17,729 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-02 22:15:17,764 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 22:15:17,764 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 22:15:17,765 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 22:15:17,765 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 22:15:17,765 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 22:15:17,765 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 22:15:17,766 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 22:15:17,766 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 22:15:17,766 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 22:15:17,766 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 22:15:17,767 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 22:15:17,767 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 22:15:17,767 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 22:15:17,767 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 22:15:17,767 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 22:15:17,767 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 22:15:17,767 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 22:15:17,767 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 22:15:17,768 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 22:15:17,768 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 22:15:17,768 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 22:15:17,768 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 22:15:17,768 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 22:15:17,768 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 22:15:17,768 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 22:15:17,769 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 22:15:17,769 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 22:15:17,769 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 22:15:17,769 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 22:15:17,769 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 22:15:17,769 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 22:15:17,769 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 22:15:17,769 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 22:15:17,770 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 22:15:17,770 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 22:15:17,770 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 22:15:17,770 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 22:15:17,770 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 22:15:17,770 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 22:15:17,770 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 22:15:17,770 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 22:15:17,771 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 22:15:17,986 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 22:15:18,010 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 22:15:18,012 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 22:15:18,013 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 22:15:18,014 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 22:15:18,015 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops-crafted-1/Mono6_1.c [2023-04-02 22:15:19,210 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 22:15:19,357 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 22:15:19,358 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/Mono6_1.c [2023-04-02 22:15:19,363 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/60a683a67/ee1c5f695bd3490fb7d92a65646be9f6/FLAGd424a1922 [2023-04-02 22:15:19,378 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/60a683a67/ee1c5f695bd3490fb7d92a65646be9f6 [2023-04-02 22:15:19,381 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 22:15:19,382 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 22:15:19,383 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 22:15:19,383 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 22:15:19,386 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 22:15:19,387 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 10:15:19" (1/1) ... [2023-04-02 22:15:19,388 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6365ebfd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:15:19, skipping insertion in model container [2023-04-02 22:15:19,388 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 10:15:19" (1/1) ... [2023-04-02 22:15:19,393 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 22:15:19,407 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 22:15:19,519 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/Mono6_1.c[311,324] [2023-04-02 22:15:19,530 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 22:15:19,539 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 22:15:19,551 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/Mono6_1.c[311,324] [2023-04-02 22:15:19,554 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 22:15:19,565 INFO L208 MainTranslator]: Completed translation [2023-04-02 22:15:19,566 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:15:19 WrapperNode [2023-04-02 22:15:19,566 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 22:15:19,567 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 22:15:19,567 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 22:15:19,567 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 22:15:19,576 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:15:19" (1/1) ... [2023-04-02 22:15:19,576 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:15:19" (1/1) ... [2023-04-02 22:15:19,582 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:15:19" (1/1) ... [2023-04-02 22:15:19,582 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:15:19" (1/1) ... [2023-04-02 22:15:19,587 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:15:19" (1/1) ... [2023-04-02 22:15:19,590 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:15:19" (1/1) ... [2023-04-02 22:15:19,594 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:15:19" (1/1) ... [2023-04-02 22:15:19,594 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:15:19" (1/1) ... [2023-04-02 22:15:19,596 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 22:15:19,597 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 22:15:19,597 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 22:15:19,597 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 22:15:19,599 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:15:19" (1/1) ... [2023-04-02 22:15:19,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 22:15:19,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:15:19,630 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) [2023-04-02 22:15:19,653 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 [2023-04-02 22:15:19,669 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 22:15:19,669 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 22:15:19,669 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 22:15:19,669 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-02 22:15:19,669 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 22:15:19,670 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 22:15:19,670 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 22:15:19,670 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 22:15:19,670 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 22:15:19,670 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-02 22:15:19,670 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 22:15:19,670 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 22:15:19,670 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 22:15:19,671 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 22:15:19,671 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 22:15:19,671 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 22:15:19,671 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 22:15:19,737 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 22:15:19,739 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 22:15:19,886 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 22:15:19,913 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 22:15:19,914 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-02 22:15:19,916 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 10:15:19 BoogieIcfgContainer [2023-04-02 22:15:19,916 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 22:15:19,918 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 22:15:19,918 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 22:15:19,921 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 22:15:19,921 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 10:15:19" (1/3) ... [2023-04-02 22:15:19,921 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57b0fd01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 10:15:19, skipping insertion in model container [2023-04-02 22:15:19,922 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:15:19" (2/3) ... [2023-04-02 22:15:19,922 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57b0fd01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 10:15:19, skipping insertion in model container [2023-04-02 22:15:19,922 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 10:15:19" (3/3) ... [2023-04-02 22:15:19,923 INFO L112 eAbstractionObserver]: Analyzing ICFG Mono6_1.c [2023-04-02 22:15:19,937 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 22:15:19,937 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 22:15:20,015 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 22:15:20,022 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@4b149002, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 22:15:20,022 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 22:15:20,026 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 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) [2023-04-02 22:15:20,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-04-02 22:15:20,033 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:15:20,034 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:15:20,035 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:15:20,040 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:15:20,040 INFO L85 PathProgramCache]: Analyzing trace with hash 307237867, now seen corresponding path program 1 times [2023-04-02 22:15:20,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:15:20,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344066117] [2023-04-02 22:15:20,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:15:20,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:15:20,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:15:20,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 22:15:20,411 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:15:20,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344066117] [2023-04-02 22:15:20,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344066117] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 22:15:20,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 22:15:20,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 22:15:20,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939404384] [2023-04-02 22:15:20,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 22:15:20,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 22:15:20,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:15:20,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 22:15:20,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 22:15:20,457 INFO L87 Difference]: Start difference. First operand has 17 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 22:15:20,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:15:20,499 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2023-04-02 22:15:20,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 22:15:20,502 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2023-04-02 22:15:20,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:15:20,506 INFO L225 Difference]: With dead ends: 29 [2023-04-02 22:15:20,507 INFO L226 Difference]: Without dead ends: 12 [2023-04-02 22:15:20,509 INFO L412 NwaCegarLoop]: 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 [2023-04-02 22:15:20,512 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 22:15:20,513 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 22:15:20,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2023-04-02 22:15:20,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2023-04-02 22:15:20,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 22:15:20,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2023-04-02 22:15:20,580 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2023-04-02 22:15:20,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:15:20,581 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2023-04-02 22:15:20,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 22:15:20,582 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2023-04-02 22:15:20,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-02 22:15:20,583 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:15:20,583 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:15:20,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 22:15:20,585 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:15:20,586 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:15:20,586 INFO L85 PathProgramCache]: Analyzing trace with hash 913642257, now seen corresponding path program 1 times [2023-04-02 22:15:20,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:15:20,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592569198] [2023-04-02 22:15:20,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:15:20,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:15:20,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:15:20,735 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 22:15:20,735 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:15:20,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592569198] [2023-04-02 22:15:20,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592569198] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 22:15:20,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804897801] [2023-04-02 22:15:20,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:15:20,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:15:20,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:15:20,740 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) [2023-04-02 22:15:20,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-02 22:15:20,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:15:20,779 INFO L262 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2023-04-02 22:15:20,784 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:15:20,868 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 22:15:20,868 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 22:15:21,066 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 22:15:21,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804897801] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 22:15:21,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [608730943] [2023-04-02 22:15:21,091 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-04-02 22:15:21,091 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 22:15:21,094 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 22:15:21,100 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 22:15:21,101 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 22:15:21,174 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-02 22:15:21,327 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 44 for LOIs [2023-04-02 22:15:21,427 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 22:15:21,434 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 22:15:21,889 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '157#(and (exists ((v_main_~x~0_BEFORE_CALL_2 Int) (v_main_~z~0_BEFORE_CALL_2 Int) (v_main_~y~0_BEFORE_CALL_1 Int)) (and (or (and (<= 1 |#StackHeapBarrier|) (= v_main_~y~0_BEFORE_CALL_1 10000000) (= 5000000 v_main_~z~0_BEFORE_CALL_2) (<= 1 (+ v_main_~x~0_BEFORE_CALL_2 |#StackHeapBarrier|)) (= |#NULL.offset| 0) (<= 0 v_main_~x~0_BEFORE_CALL_2) (= |#NULL.base| 0)) (and (<= v_main_~z~0_BEFORE_CALL_2 (+ 5000000 v_main_~x~0_BEFORE_CALL_2)) (<= 1 |#StackHeapBarrier|) (= v_main_~y~0_BEFORE_CALL_1 10000000) (<= 5000000 (+ v_main_~x~0_BEFORE_CALL_2 v_main_~z~0_BEFORE_CALL_2)) (<= 5000001 (+ |#StackHeapBarrier| v_main_~z~0_BEFORE_CALL_2)) (<= 5000000 v_main_~z~0_BEFORE_CALL_2) (<= 1 (+ v_main_~x~0_BEFORE_CALL_2 |#StackHeapBarrier|)) (= |#NULL.offset| 0) (<= 0 v_main_~x~0_BEFORE_CALL_2) (= |#NULL.base| 0))) (<= (mod v_main_~y~0_BEFORE_CALL_1 4294967296) (mod v_main_~x~0_BEFORE_CALL_2 4294967296)) (= (mod v_main_~x~0_BEFORE_CALL_2 4294967296) (mod v_main_~z~0_BEFORE_CALL_2 4294967296)))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-02 22:15:21,889 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 22:15:21,889 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 22:15:21,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 12 [2023-04-02 22:15:21,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845860498] [2023-04-02 22:15:21,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 22:15:21,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-02 22:15:21,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:15:21,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-02 22:15:21,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2023-04-02 22:15:21,893 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 10 states have internal predecessors, (17), 4 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 22:15:22,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:15:22,058 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2023-04-02 22:15:22,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-02 22:15:22,058 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 10 states have internal predecessors, (17), 4 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-04-02 22:15:22,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:15:22,059 INFO L225 Difference]: With dead ends: 24 [2023-04-02 22:15:22,059 INFO L226 Difference]: Without dead ends: 15 [2023-04-02 22:15:22,060 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2023-04-02 22:15:22,061 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 3 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 22:15:22,061 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 43 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 22:15:22,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2023-04-02 22:15:22,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2023-04-02 22:15:22,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 22:15:22,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2023-04-02 22:15:22,066 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 11 [2023-04-02 22:15:22,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:15:22,066 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2023-04-02 22:15:22,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 10 states have internal predecessors, (17), 4 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 22:15:22,066 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2023-04-02 22:15:22,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-04-02 22:15:22,067 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:15:22,067 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:15:22,076 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-02 22:15:22,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:15:22,273 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:15:22,273 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:15:22,273 INFO L85 PathProgramCache]: Analyzing trace with hash 1932111211, now seen corresponding path program 2 times [2023-04-02 22:15:22,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:15:22,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97464082] [2023-04-02 22:15:22,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:15:22,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:15:22,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:15:22,502 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 22:15:22,502 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:15:22,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97464082] [2023-04-02 22:15:22,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97464082] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 22:15:22,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266245994] [2023-04-02 22:15:22,505 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 22:15:22,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:15:22,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:15:22,509 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) [2023-04-02 22:15:22,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-02 22:15:22,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-02 22:15:22,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 22:15:22,585 INFO L262 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 22 conjunts are in the unsatisfiable core [2023-04-02 22:15:22,587 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:15:22,710 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 22:15:22,710 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 22:15:25,905 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 22:15:25,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266245994] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 22:15:25,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [458453826] [2023-04-02 22:15:25,914 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-04-02 22:15:25,915 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 22:15:25,915 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 22:15:25,915 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 22:15:25,915 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 22:15:25,942 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-02 22:15:26,015 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 44 for LOIs [2023-04-02 22:15:26,063 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 22:15:26,069 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 22:15:26,601 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '341#(and (= |__VERIFIER_assert_#in~cond| 0) (exists ((v_main_~x~0_BEFORE_CALL_4 Int) (v_main_~z~0_BEFORE_CALL_4 Int) (v_main_~y~0_BEFORE_CALL_2 Int)) (and (or (and (<= 1 |#StackHeapBarrier|) (<= 1 (+ v_main_~x~0_BEFORE_CALL_4 |#StackHeapBarrier|)) (<= 0 v_main_~x~0_BEFORE_CALL_4) (= 5000000 v_main_~z~0_BEFORE_CALL_4) (= |#NULL.offset| 0) (= v_main_~y~0_BEFORE_CALL_2 10000000) (= |#NULL.base| 0)) (and (<= 1 |#StackHeapBarrier|) (<= 5000000 v_main_~z~0_BEFORE_CALL_4) (<= 5000000 (+ v_main_~x~0_BEFORE_CALL_4 v_main_~z~0_BEFORE_CALL_4)) (<= 1 (+ v_main_~x~0_BEFORE_CALL_4 |#StackHeapBarrier|)) (<= 0 v_main_~x~0_BEFORE_CALL_4) (<= 5000001 (+ |#StackHeapBarrier| v_main_~z~0_BEFORE_CALL_4)) (<= v_main_~z~0_BEFORE_CALL_4 (+ 5000000 v_main_~x~0_BEFORE_CALL_4)) (= |#NULL.offset| 0) (= v_main_~y~0_BEFORE_CALL_2 10000000) (= |#NULL.base| 0))) (= (mod v_main_~x~0_BEFORE_CALL_4 4294967296) (mod v_main_~z~0_BEFORE_CALL_4 4294967296)) (<= (mod v_main_~y~0_BEFORE_CALL_2 4294967296) (mod v_main_~x~0_BEFORE_CALL_4 4294967296)))) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-02 22:15:26,601 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 22:15:26,601 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 22:15:26,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 21 [2023-04-02 22:15:26,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617541975] [2023-04-02 22:15:26,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 22:15:26,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-04-02 22:15:26,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:15:26,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-04-02 22:15:26,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=716, Unknown=0, NotChecked=0, Total=812 [2023-04-02 22:15:26,603 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 21 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 19 states have internal predecessors, (26), 4 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 22:15:54,673 WARN L223 SmtUtils]: Spent 21.62s on a formula simplification. DAG size of input: 109 DAG size of output: 58 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 22:15:56,571 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.89s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-04-02 22:16:04,907 WARN L223 SmtUtils]: Spent 5.48s on a formula simplification. DAG size of input: 72 DAG size of output: 39 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 22:16:07,035 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-04-02 22:16:11,220 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-04-02 22:16:12,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:16:12,872 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2023-04-02 22:16:12,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-02 22:16:12,873 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 19 states have internal predecessors, (26), 4 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2023-04-02 22:16:12,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:16:12,873 INFO L225 Difference]: With dead ends: 33 [2023-04-02 22:16:12,873 INFO L226 Difference]: Without dead ends: 21 [2023-04-02 22:16:12,874 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 42.2s TimeCoverageRelationStatistics Valid=217, Invalid=1263, Unknown=2, NotChecked=0, Total=1482 [2023-04-02 22:16:12,875 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 12 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2023-04-02 22:16:12,876 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 79 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 6.5s Time] [2023-04-02 22:16:12,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-04-02 22:16:12,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-04-02 22:16:12,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.0625) internal successors, (17), 16 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 22:16:12,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2023-04-02 22:16:12,883 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 14 [2023-04-02 22:16:12,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:16:12,883 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2023-04-02 22:16:12,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 19 states have internal predecessors, (26), 4 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 22:16:12,884 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2023-04-02 22:16:12,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-04-02 22:16:12,884 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:16:12,884 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:16:12,892 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-04-02 22:16:13,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-04-02 22:16:13,090 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:16:13,091 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:16:13,091 INFO L85 PathProgramCache]: Analyzing trace with hash -831935573, now seen corresponding path program 3 times [2023-04-02 22:16:13,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:16:13,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482219783] [2023-04-02 22:16:13,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:16:13,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:16:13,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:16:13,498 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 22:16:13,498 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:16:13,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482219783] [2023-04-02 22:16:13,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482219783] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 22:16:13,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628622275] [2023-04-02 22:16:13,499 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 22:16:13,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:16:13,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:16:13,502 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) [2023-04-02 22:16:13,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-02 22:16:13,612 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 22:16:13,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 22:16:13,614 INFO L262 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 43 conjunts are in the unsatisfiable core [2023-04-02 22:16:13,616 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:16:13,924 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 22:16:13,924 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 22:16:45,919 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 22:16:45,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628622275] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 22:16:45,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1891020762] [2023-04-02 22:16:45,921 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-04-02 22:16:45,922 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 22:16:45,922 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 22:16:45,922 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 22:16:45,922 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 22:16:45,938 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-02 22:16:45,984 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 44 for LOIs [2023-04-02 22:16:46,016 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 22:16:46,019 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 22:16:46,910 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '621#(and (exists ((v_main_~x~0_BEFORE_CALL_6 Int) (v_main_~y~0_BEFORE_CALL_3 Int) (v_main_~z~0_BEFORE_CALL_6 Int)) (and (or (and (<= 1 |#StackHeapBarrier|) (<= 5000000 (+ v_main_~x~0_BEFORE_CALL_6 v_main_~z~0_BEFORE_CALL_6)) (<= 1 (+ v_main_~x~0_BEFORE_CALL_6 |#StackHeapBarrier|)) (= v_main_~y~0_BEFORE_CALL_3 10000000) (<= 0 v_main_~x~0_BEFORE_CALL_6) (= |#NULL.offset| 0) (<= v_main_~z~0_BEFORE_CALL_6 (+ 5000000 v_main_~x~0_BEFORE_CALL_6)) (<= 5000001 (+ |#StackHeapBarrier| v_main_~z~0_BEFORE_CALL_6)) (= |#NULL.base| 0) (<= 5000000 v_main_~z~0_BEFORE_CALL_6)) (and (<= 1 |#StackHeapBarrier|) (<= 1 (+ v_main_~x~0_BEFORE_CALL_6 |#StackHeapBarrier|)) (= v_main_~y~0_BEFORE_CALL_3 10000000) (<= 0 v_main_~x~0_BEFORE_CALL_6) (= 5000000 v_main_~z~0_BEFORE_CALL_6) (= |#NULL.offset| 0) (= |#NULL.base| 0))) (= (mod v_main_~z~0_BEFORE_CALL_6 4294967296) (mod v_main_~x~0_BEFORE_CALL_6 4294967296)) (<= (mod v_main_~y~0_BEFORE_CALL_3 4294967296) (mod v_main_~x~0_BEFORE_CALL_6 4294967296)))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-02 22:16:46,910 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 22:16:46,910 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 22:16:46,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 15] total 39 [2023-04-02 22:16:46,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971693655] [2023-04-02 22:16:46,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 22:16:46,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-04-02 22:16:46,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:16:46,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-04-02 22:16:46,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=1911, Unknown=0, NotChecked=0, Total=2162 [2023-04-02 22:16:46,913 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand has 39 states, 39 states have (on average 1.1282051282051282) internal successors, (44), 37 states have internal predecessors, (44), 4 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)