/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/eca-rers2012/Problem03_label14.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 03:20:47,087 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 03:20:47,090 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 03:20:47,128 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 03:20:47,129 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 03:20:47,132 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 03:20:47,135 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 03:20:47,137 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 03:20:47,139 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 03:20:47,144 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 03:20:47,145 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 03:20:47,146 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2023-04-01 03:20:47,177 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 03:20:47,178 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 03:20:47,179 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 03:20:47,179 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 03:20:47,180 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 03:20:47,180 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 03:20:47,182 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 03:20:47,183 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 03:20:47,183 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 03:20:47,184 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 03:20:47,185 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 03:20:47,186 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 [2023-04-01 03:20:47,205 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 03:20:47,205 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 03:20:47,206 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 03:20:47,206 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 03:20:47,207 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 03:20:47,207 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 03:20:47,207 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 03:20:47,207 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 03:20:47,207 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 03:20:47,207 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 03:20:47,208 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 03:20:47,208 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 03:20:47,208 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 03:20:47,208 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 03:20:47,208 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 03:20:47,208 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 03:20:47,208 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 03:20:47,209 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 03:20:47,209 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 03:20:47,209 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 03:20:47,209 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 03:20:47,210 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 03:20:47,210 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 03:20:47,210 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 03:20:47,210 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 03:20:47,210 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 03:20:47,210 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 03:20:47,210 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 03:20:47,210 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 03:20:47,211 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 03:20:47,211 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 03:20:47,211 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 03:20:47,211 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 03:20:47,211 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 03:20:47,211 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 03:20:47,211 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 03:20:47,211 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 03:20:47,212 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 03:20:47,212 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 03:20:47,212 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 03:20:47,212 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 03:20:47,212 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 03:20:47,404 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 03:20:47,422 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 03:20:47,425 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 03:20:47,426 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 03:20:47,427 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 03:20:47,428 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem03_label14.c [2023-04-01 03:20:48,591 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 03:20:48,899 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 03:20:48,900 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label14.c [2023-04-01 03:20:48,916 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9cf42e625/557aad75e5424ddf967422d596482f0f/FLAG4eb271276 [2023-04-01 03:20:48,935 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9cf42e625/557aad75e5424ddf967422d596482f0f [2023-04-01 03:20:48,937 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 03:20:48,939 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 03:20:48,940 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 03:20:48,941 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 03:20:48,944 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 03:20:48,945 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 03:20:48" (1/1) ... [2023-04-01 03:20:48,946 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20e416e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:20:48, skipping insertion in model container [2023-04-01 03:20:48,946 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 03:20:48" (1/1) ... [2023-04-01 03:20:48,953 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 03:20:49,015 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 03:20:49,505 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/eca-rers2012/Problem03_label14.c[57171,57184] [2023-04-01 03:20:49,541 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 03:20:49,553 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 03:20:49,852 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/eca-rers2012/Problem03_label14.c[57171,57184] [2023-04-01 03:20:49,863 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 03:20:49,880 INFO L208 MainTranslator]: Completed translation [2023-04-01 03:20:49,881 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:20:49 WrapperNode [2023-04-01 03:20:49,881 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 03:20:49,882 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 03:20:49,882 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 03:20:49,882 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 03:20:49,894 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:20:49" (1/1) ... [2023-04-01 03:20:49,894 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:20:49" (1/1) ... [2023-04-01 03:20:49,939 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:20:49" (1/1) ... [2023-04-01 03:20:49,940 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:20:49" (1/1) ... [2023-04-01 03:20:50,004 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:20:49" (1/1) ... [2023-04-01 03:20:50,013 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:20:49" (1/1) ... [2023-04-01 03:20:50,027 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:20:49" (1/1) ... [2023-04-01 03:20:50,038 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:20:49" (1/1) ... [2023-04-01 03:20:50,058 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 03:20:50,060 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 03:20:50,060 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 03:20:50,060 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 03:20:50,061 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:20:49" (1/1) ... [2023-04-01 03:20:50,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 03:20:50,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:20:50,098 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) [2023-04-01 03:20:50,124 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 [2023-04-01 03:20:50,141 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 03:20:50,141 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 03:20:50,141 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 03:20:50,141 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 03:20:50,141 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 03:20:50,141 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 03:20:50,141 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 03:20:50,141 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 03:20:50,142 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 03:20:50,142 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 03:20:50,142 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 03:20:50,142 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 03:20:50,142 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 03:20:50,142 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 03:20:50,142 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 03:20:50,142 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 03:20:50,142 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 03:20:50,142 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 03:20:50,143 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 03:20:50,271 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 03:20:50,273 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 03:20:51,874 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 03:20:52,154 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 03:20:52,154 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 03:20:52,160 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 03:20:52 BoogieIcfgContainer [2023-04-01 03:20:52,160 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 03:20:52,163 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 03:20:52,164 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 03:20:52,166 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 03:20:52,167 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 03:20:48" (1/3) ... [2023-04-01 03:20:52,167 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c9006eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 03:20:52, skipping insertion in model container [2023-04-01 03:20:52,167 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:20:49" (2/3) ... [2023-04-01 03:20:52,168 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c9006eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 03:20:52, skipping insertion in model container [2023-04-01 03:20:52,168 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 03:20:52" (3/3) ... [2023-04-01 03:20:52,171 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label14.c [2023-04-01 03:20:52,189 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 03:20:52,190 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 03:20:52,249 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 03:20:52,256 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;@6e80a281, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 03:20:52,256 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 03:20:52,264 INFO L276 IsEmpty]: Start isEmpty. Operand has 158 states, 150 states have (on average 1.9466666666666668) internal successors, (292), 151 states have internal predecessors, (292), 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) [2023-04-01 03:20:52,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2023-04-01 03:20:52,281 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:20:52,282 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:20:52,283 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:20:52,289 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:20:52,290 INFO L85 PathProgramCache]: Analyzing trace with hash 729858069, now seen corresponding path program 1 times [2023-04-01 03:20:52,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:20:52,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557823328] [2023-04-01 03:20:52,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:20:52,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:20:52,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:20:53,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:20:53,836 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:20:53,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557823328] [2023-04-01 03:20:53,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557823328] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 03:20:53,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 03:20:53,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 03:20:53,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359394680] [2023-04-01 03:20:53,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 03:20:53,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 03:20:53,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:20:53,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 03:20:53,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 03:20:53,892 INFO L87 Difference]: Start difference. First operand has 158 states, 150 states have (on average 1.9466666666666668) internal successors, (292), 151 states have internal predecessors, (292), 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 48.333333333333336) internal successors, (145), 2 states have internal predecessors, (145), 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) [2023-04-01 03:20:54,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:20:54,717 INFO L93 Difference]: Finished difference Result 462 states and 886 transitions. [2023-04-01 03:20:54,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 03:20:54,720 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 2 states have internal predecessors, (145), 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 149 [2023-04-01 03:20:54,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:20:54,740 INFO L225 Difference]: With dead ends: 462 [2023-04-01 03:20:54,740 INFO L226 Difference]: Without dead ends: 301 [2023-04-01 03:20:54,744 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 03:20:54,748 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 35 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 457 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-01 03:20:54,749 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 74 Invalid, 601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 457 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-01 03:20:54,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2023-04-01 03:20:54,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 301. [2023-04-01 03:20:54,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 293 states have (on average 1.795221843003413) internal successors, (526), 293 states have internal predecessors, (526), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-04-01 03:20:54,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 535 transitions. [2023-04-01 03:20:54,833 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 535 transitions. Word has length 149 [2023-04-01 03:20:54,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:20:54,837 INFO L495 AbstractCegarLoop]: Abstraction has 301 states and 535 transitions. [2023-04-01 03:20:54,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 2 states have internal predecessors, (145), 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) [2023-04-01 03:20:54,837 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 535 transitions. [2023-04-01 03:20:54,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2023-04-01 03:20:54,842 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:20:54,842 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:20:54,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 03:20:54,843 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:20:54,843 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:20:54,843 INFO L85 PathProgramCache]: Analyzing trace with hash 2106094863, now seen corresponding path program 1 times [2023-04-01 03:20:54,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:20:54,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106739987] [2023-04-01 03:20:54,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:20:54,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:20:54,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:20:55,383 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:20:55,383 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:20:55,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106739987] [2023-04-01 03:20:55,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106739987] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 03:20:55,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 03:20:55,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 03:20:55,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107179009] [2023-04-01 03:20:55,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 03:20:55,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 03:20:55,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:20:55,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 03:20:55,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 03:20:55,388 INFO L87 Difference]: Start difference. First operand 301 states and 535 transitions. Second operand has 5 states, 5 states have (on average 30.2) internal successors, (151), 4 states have internal predecessors, (151), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 03:20:56,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:20:56,256 INFO L93 Difference]: Finished difference Result 921 states and 1652 transitions. [2023-04-01 03:20:56,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 03:20:56,258 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.2) internal successors, (151), 4 states have internal predecessors, (151), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 157 [2023-04-01 03:20:56,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:20:56,263 INFO L225 Difference]: With dead ends: 921 [2023-04-01 03:20:56,263 INFO L226 Difference]: Without dead ends: 625 [2023-04-01 03:20:56,270 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-04-01 03:20:56,271 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 528 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 932 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 528 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 1088 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 932 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-04-01 03:20:56,272 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [528 Valid, 46 Invalid, 1088 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 932 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-04-01 03:20:56,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2023-04-01 03:20:56,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 605. [2023-04-01 03:20:56,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 605 states, 588 states have (on average 1.6581632653061225) internal successors, (975), 593 states have internal predecessors, (975), 6 states have call successors, (6), 6 states have call predecessors, (6), 10 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) [2023-04-01 03:20:56,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 1003 transitions. [2023-04-01 03:20:56,317 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 1003 transitions. Word has length 157 [2023-04-01 03:20:56,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:20:56,323 INFO L495 AbstractCegarLoop]: Abstraction has 605 states and 1003 transitions. [2023-04-01 03:20:56,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.2) internal successors, (151), 4 states have internal predecessors, (151), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 03:20:56,324 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 1003 transitions. [2023-04-01 03:20:56,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2023-04-01 03:20:56,331 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:20:56,336 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:20:56,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 03:20:56,337 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:20:56,338 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:20:56,338 INFO L85 PathProgramCache]: Analyzing trace with hash 1766311022, now seen corresponding path program 1 times [2023-04-01 03:20:56,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:20:56,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948137859] [2023-04-01 03:20:56,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:20:56,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:20:56,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:20:56,801 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 03:20:56,801 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:20:56,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948137859] [2023-04-01 03:20:56,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948137859] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 03:20:56,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307404145] [2023-04-01 03:20:56,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:20:56,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:20:56,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:20:56,807 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) [2023-04-01 03:20:56,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 03:20:57,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:20:57,079 INFO L262 TraceCheckSpWp]: Trace formula consists of 1033 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 03:20:57,094 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:20:57,172 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:20:57,172 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 03:20:57,252 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:20:57,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307404145] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 03:20:57,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [759881734] [2023-04-01 03:20:57,276 INFO L159 IcfgInterpreter]: Started Sifa with 153 locations of interest [2023-04-01 03:20:57,276 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 03:20:57,279 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 03:20:57,284 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 03:20:57,284 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 03:20:58,278 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 162 for LOIs [2023-04-01 03:21:08,280 WARN L223 SmtUtils]: Spent 8.54s on a formula simplification that was a NOOP. DAG size: 962 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm)