/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/psyco/psyco_abp_1-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 04:34:29,836 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 04:34:29,837 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 04:34:29,865 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-04-01 04:34:29,897 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 04:34:29,898 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 04:34:29,898 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 04:34:29,903 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 04:34:29,935 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 04:34:29,935 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 04:34:29,935 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 04:34:29,936 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 04:34:29,936 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 04:34:29,936 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 04:34:29,937 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 04:34:29,937 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 04:34:29,937 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 04:34:29,937 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 04:34:29,938 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 04:34:29,938 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 04:34:29,938 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 04:34:29,938 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 04:34:29,938 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 04:34:29,938 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 04:34:29,939 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 04:34:29,939 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 04:34:29,939 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 04:34:29,939 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 04:34:29,940 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 04:34:29,940 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 04:34:29,940 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 04:34:29,940 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 04:34:29,940 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 04:34:29,940 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 04:34:29,940 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 04:34:29,940 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 04:34:29,941 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 04:34:29,941 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 04:34:29,941 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 04:34:29,941 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 04:34:29,941 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:34:29,942 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 04:34:29,942 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 04:34:29,942 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 04:34:29,942 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 04:34:29,942 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 04:34:29,942 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 04:34:29,942 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 04:34:29,942 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 04:34:29,943 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 04:34:30,150 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 04:34:30,173 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 04:34:30,175 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 04:34:30,176 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 04:34:30,176 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 04:34:30,177 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/psyco/psyco_abp_1-1.c [2023-04-01 04:34:31,328 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 04:34:31,560 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 04:34:31,560 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/psyco/psyco_abp_1-1.c [2023-04-01 04:34:31,569 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b7d07e05a/1da630c0f003495d861008dd4fe9b1f1/FLAG6fdb838ee [2023-04-01 04:34:31,580 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b7d07e05a/1da630c0f003495d861008dd4fe9b1f1 [2023-04-01 04:34:31,582 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 04:34:31,583 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 04:34:31,584 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 04:34:31,584 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 04:34:31,587 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 04:34:31,588 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:34:31" (1/1) ... [2023-04-01 04:34:31,589 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41353c53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:34:31, skipping insertion in model container [2023-04-01 04:34:31,589 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:34:31" (1/1) ... [2023-04-01 04:34:31,594 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 04:34:31,621 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 04:34:31,911 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/psyco/psyco_abp_1-1.c[24818,24831] [2023-04-01 04:34:31,917 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:34:31,936 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 04:34:31,998 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/psyco/psyco_abp_1-1.c[24818,24831] [2023-04-01 04:34:32,000 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:34:32,022 INFO L208 MainTranslator]: Completed translation [2023-04-01 04:34:32,023 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:34:32 WrapperNode [2023-04-01 04:34:32,023 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 04:34:32,025 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 04:34:32,025 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 04:34:32,025 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 04:34:32,035 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:34:32" (1/1) ... [2023-04-01 04:34:32,035 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:34:32" (1/1) ... [2023-04-01 04:34:32,049 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:34:32" (1/1) ... [2023-04-01 04:34:32,049 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:34:32" (1/1) ... [2023-04-01 04:34:32,074 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:34:32" (1/1) ... [2023-04-01 04:34:32,083 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:34:32" (1/1) ... [2023-04-01 04:34:32,087 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:34:32" (1/1) ... [2023-04-01 04:34:32,090 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:34:32" (1/1) ... [2023-04-01 04:34:32,110 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 04:34:32,111 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 04:34:32,111 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 04:34:32,112 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 04:34:32,112 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:34:32" (1/1) ... [2023-04-01 04:34:32,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:34:32,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:34:32,153 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 04:34:32,162 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 04:34:32,198 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 04:34:32,198 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 04:34:32,198 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 04:34:32,198 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 04:34:32,199 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 04:34:32,200 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 04:34:32,200 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 04:34:32,200 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 04:34:32,200 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 04:34:32,200 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 04:34:32,201 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 04:34:32,201 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 04:34:32,201 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 04:34:32,201 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 04:34:32,201 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 04:34:32,201 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 04:34:32,311 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 04:34:32,313 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 04:34:32,891 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 04:34:32,928 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 04:34:32,928 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-04-01 04:34:32,931 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:34:32 BoogieIcfgContainer [2023-04-01 04:34:32,931 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 04:34:32,933 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 04:34:32,933 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 04:34:32,935 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 04:34:32,936 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 04:34:31" (1/3) ... [2023-04-01 04:34:32,936 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@104758ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:34:32, skipping insertion in model container [2023-04-01 04:34:32,936 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:34:32" (2/3) ... [2023-04-01 04:34:32,937 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@104758ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:34:32, skipping insertion in model container [2023-04-01 04:34:32,937 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:34:32" (3/3) ... [2023-04-01 04:34:32,943 INFO L112 eAbstractionObserver]: Analyzing ICFG psyco_abp_1-1.c [2023-04-01 04:34:32,959 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 04:34:32,959 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 04:34:33,011 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 04:34:33,017 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;@69544073, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 04:34:33,018 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 04:34:33,023 INFO L276 IsEmpty]: Start isEmpty. Operand has 113 states, 107 states have (on average 1.9532710280373833) internal successors, (209), 108 states have internal predecessors, (209), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:34:33,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-04-01 04:34:33,030 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:34:33,031 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:34:33,032 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:34:33,039 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:34:33,039 INFO L85 PathProgramCache]: Analyzing trace with hash -1952582693, now seen corresponding path program 1 times [2023-04-01 04:34:33,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:34:33,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077645729] [2023-04-01 04:34:33,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:34:33,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:34:33,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:34:33,171 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 04:34:33,172 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:34:33,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077645729] [2023-04-01 04:34:33,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077645729] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:34:33,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:34:33,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-04-01 04:34:33,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702422462] [2023-04-01 04:34:33,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:34:33,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-04-01 04:34:33,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:34:33,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-04-01 04:34:33,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-01 04:34:33,204 INFO L87 Difference]: Start difference. First operand has 113 states, 107 states have (on average 1.9532710280373833) internal successors, (209), 108 states have internal predecessors, (209), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:34:33,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:34:33,238 INFO L93 Difference]: Finished difference Result 221 states and 421 transitions. [2023-04-01 04:34:33,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-04-01 04:34:33,240 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2023-04-01 04:34:33,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:34:33,248 INFO L225 Difference]: With dead ends: 221 [2023-04-01 04:34:33,248 INFO L226 Difference]: Without dead ends: 108 [2023-04-01 04:34:33,252 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-01 04:34:33,258 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 04:34:33,259 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 206 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 04:34:33,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2023-04-01 04:34:33,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2023-04-01 04:34:33,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 104 states have (on average 1.6826923076923077) internal successors, (175), 104 states have internal predecessors, (175), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:34:33,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 178 transitions. [2023-04-01 04:34:33,299 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 178 transitions. Word has length 12 [2023-04-01 04:34:33,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:34:33,299 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 178 transitions. [2023-04-01 04:34:33,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:34:33,299 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 178 transitions. [2023-04-01 04:34:33,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-04-01 04:34:33,300 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:34:33,300 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:34:33,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 04:34:33,301 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:34:33,301 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:34:33,301 INFO L85 PathProgramCache]: Analyzing trace with hash 131966188, now seen corresponding path program 1 times [2023-04-01 04:34:33,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:34:33,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426344829] [2023-04-01 04:34:33,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:34:33,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:34:33,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:34:33,402 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 04:34:33,402 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:34:33,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426344829] [2023-04-01 04:34:33,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426344829] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:34:33,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:34:33,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 04:34:33,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195732541] [2023-04-01 04:34:33,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:34:33,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:34:33,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:34:33,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:34:33,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:34:33,405 INFO L87 Difference]: Start difference. First operand 108 states and 178 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:34:33,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:34:33,473 INFO L93 Difference]: Finished difference Result 214 states and 355 transitions. [2023-04-01 04:34:33,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 04:34:33,473 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2023-04-01 04:34:33,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:34:33,475 INFO L225 Difference]: With dead ends: 214 [2023-04-01 04:34:33,475 INFO L226 Difference]: Without dead ends: 111 [2023-04-01 04:34:33,476 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 04:34:33,477 INFO L413 NwaCegarLoop]: 175 mSDtfsCounter, 4 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 04:34:33,477 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 330 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 04:34:33,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2023-04-01 04:34:33,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2023-04-01 04:34:33,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 107 states have (on average 1.6635514018691588) internal successors, (178), 107 states have internal predecessors, (178), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:34:33,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 181 transitions. [2023-04-01 04:34:33,495 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 181 transitions. Word has length 13 [2023-04-01 04:34:33,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:34:33,495 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 181 transitions. [2023-04-01 04:34:33,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:34:33,495 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 181 transitions. [2023-04-01 04:34:33,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-04-01 04:34:33,496 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:34:33,496 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:34:33,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 04:34:33,500 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:34:33,501 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:34:33,501 INFO L85 PathProgramCache]: Analyzing trace with hash -1714373663, now seen corresponding path program 1 times [2023-04-01 04:34:33,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:34:33,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590678901] [2023-04-01 04:34:33,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:34:33,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:34:33,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:34:34,105 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:34:34,106 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:34:34,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590678901] [2023-04-01 04:34:34,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590678901] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:34:34,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:34:34,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:34:34,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538421624] [2023-04-01 04:34:34,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:34:34,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:34:34,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:34:34,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:34:34,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:34:34,110 INFO L87 Difference]: Start difference. First operand 111 states and 181 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:34:34,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:34:34,395 INFO L93 Difference]: Finished difference Result 222 states and 359 transitions. [2023-04-01 04:34:34,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 04:34:34,396 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2023-04-01 04:34:34,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:34:34,401 INFO L225 Difference]: With dead ends: 222 [2023-04-01 04:34:34,402 INFO L226 Difference]: Without dead ends: 198 [2023-04-01 04:34:34,405 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-04-01 04:34:34,407 INFO L413 NwaCegarLoop]: 171 mSDtfsCounter, 152 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 537 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 04:34:34,408 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 537 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 04:34:34,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2023-04-01 04:34:34,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 180. [2023-04-01 04:34:34,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 176 states have (on average 1.6534090909090908) internal successors, (291), 176 states have internal predecessors, (291), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:34:34,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 294 transitions. [2023-04-01 04:34:34,423 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 294 transitions. Word has length 18 [2023-04-01 04:34:34,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:34:34,423 INFO L495 AbstractCegarLoop]: Abstraction has 180 states and 294 transitions. [2023-04-01 04:34:34,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:34:34,423 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 294 transitions. [2023-04-01 04:34:34,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-04-01 04:34:34,424 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:34:34,424 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:34:34,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 04:34:34,424 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:34:34,429 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:34:34,429 INFO L85 PathProgramCache]: Analyzing trace with hash 1145271302, now seen corresponding path program 1 times [2023-04-01 04:34:34,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:34:34,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525192323] [2023-04-01 04:34:34,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:34:34,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:34:34,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:34:34,468 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:34:34,468 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:34:34,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525192323] [2023-04-01 04:34:34,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525192323] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:34:34,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:34:34,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 04:34:34,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442239490] [2023-04-01 04:34:34,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:34:34,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:34:34,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:34:34,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:34:34,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:34:34,470 INFO L87 Difference]: Start difference. First operand 180 states and 294 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:34:34,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:34:34,498 INFO L93 Difference]: Finished difference Result 306 states and 500 transitions. [2023-04-01 04:34:34,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 04:34:34,499 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2023-04-01 04:34:34,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:34:34,500 INFO L225 Difference]: With dead ends: 306 [2023-04-01 04:34:34,500 INFO L226 Difference]: Without dead ends: 132 [2023-04-01 04:34:34,504 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 04:34:34,512 INFO L413 NwaCegarLoop]: 174 mSDtfsCounter, 32 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 04:34:34,513 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 302 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 04:34:34,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2023-04-01 04:34:34,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 130. [2023-04-01 04:34:34,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 126 states have (on average 1.619047619047619) internal successors, (204), 126 states have internal predecessors, (204), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:34:34,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 207 transitions. [2023-04-01 04:34:34,519 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 207 transitions. Word has length 19 [2023-04-01 04:34:34,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:34:34,520 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 207 transitions. [2023-04-01 04:34:34,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:34:34,520 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 207 transitions. [2023-04-01 04:34:34,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-04-01 04:34:34,521 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:34:34,521 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:34:34,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 04:34:34,521 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:34:34,522 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:34:34,522 INFO L85 PathProgramCache]: Analyzing trace with hash -701307033, now seen corresponding path program 1 times [2023-04-01 04:34:34,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:34:34,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980284543] [2023-04-01 04:34:34,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:34:34,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:34:34,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:34:34,604 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 04:34:34,604 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:34:34,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980284543] [2023-04-01 04:34:34,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980284543] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:34:34,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:34:34,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 04:34:34,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844505137] [2023-04-01 04:34:34,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:34:34,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:34:34,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:34:34,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:34:34,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:34:34,609 INFO L87 Difference]: Start difference. First operand 130 states and 207 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:34:34,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:34:34,639 INFO L93 Difference]: Finished difference Result 261 states and 418 transitions. [2023-04-01 04:34:34,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 04:34:34,640 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2023-04-01 04:34:34,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:34:34,641 INFO L225 Difference]: With dead ends: 261 [2023-04-01 04:34:34,641 INFO L226 Difference]: Without dead ends: 137 [2023-04-01 04:34:34,642 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 04:34:34,642 INFO L413 NwaCegarLoop]: 173 mSDtfsCounter, 34 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 04:34:34,643 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 301 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 04:34:34,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2023-04-01 04:34:34,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 135. [2023-04-01 04:34:34,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 131 states have (on average 1.5954198473282444) internal successors, (209), 131 states have internal predecessors, (209), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:34:34,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 212 transitions. [2023-04-01 04:34:34,659 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 212 transitions. Word has length 24 [2023-04-01 04:34:34,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:34:34,659 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 212 transitions. [2023-04-01 04:34:34,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:34:34,659 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 212 transitions. [2023-04-01 04:34:34,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-04-01 04:34:34,660 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:34:34,660 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:34:34,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 04:34:34,661 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:34:34,661 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:34:34,661 INFO L85 PathProgramCache]: Analyzing trace with hash -1830173240, now seen corresponding path program 1 times [2023-04-01 04:34:34,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:34:34,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128412310] [2023-04-01 04:34:34,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:34:34,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:34:34,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:34:34,726 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:34:34,727 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:34:34,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128412310] [2023-04-01 04:34:34,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128412310] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:34:34,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843345863] [2023-04-01 04:34:34,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:34:34,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:34:34,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:34:34,730 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 04:34:34,732 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 04:34:34,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:34:34,810 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 04:34:34,819 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:34:34,872 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:34:34,872 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:34:34,909 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:34:34,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843345863] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 04:34:34,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [307669622] [2023-04-01 04:34:34,927 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-04-01 04:34:34,927 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 04:34:34,930 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 04:34:34,935 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 04:34:34,935 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 04:34:35,098 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 29 for LOIs [2023-04-01 04:34:42,367 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 28 for LOIs [2023-04-01 04:34:42,378 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 04:35:01,146 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2305#(and (<= main_~P6~0 2147483647) (= main_~method_id~0 2) (<= 1 |#StackHeapBarrier|) (= 6 ~m_recv_ack_1_1~0) (= 2 ~m_msg_2~0) (= ~m_msg_1_1~0 4) (<= 0 (+ main_~P4~0 2147483648)) (= 7 ~m_recv_ack_1_2~0) (<= main_~P1~0 2147483647) (<= 0 (+ main_~P7~0 2147483648)) (<= main_~P4~0 2147483647) (= ~m_msg_1_2~0 5) (<= 0 (+ main_~P6~0 2147483648)) (= main_~this_buffer_empty~0 1) (= main_~q~0 3) (= ~m_Protocol~0 1) (<= main_~P3~0 2147483647) (<= 0 (+ main_~P2~0 2147483648)) (= (mod main_~P1~0 2) 0) (<= 0 (+ main_~P3~0 2147483648)) (<= main_~P9~0 2147483647) (<= 0 (+ main_~P9~0 2147483648)) (= main_~this_expect~0 0) (<= 0 (+ main_~P5~0 2147483648)) (<= main_~P5~0 2147483647) (= 3 ~m_recv_ack_2~0) (= |#NULL.offset| 0) (<= 0 (+ main_~P8~0 2147483648)) (<= 0 (+ main_~P1~0 2147483648)) (<= main_~P7~0 2147483647) (<= main_~P8~0 2147483647) (<= main_~P2~0 2147483647) (= |#NULL.base| 0))' at error location [2023-04-01 04:35:01,146 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 04:35:01,146 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 04:35:01,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-04-01 04:35:01,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418389165] [2023-04-01 04:35:01,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 04:35:01,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:35:01,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:35:01,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:35:01,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2023-04-01 04:35:01,148 INFO L87 Difference]: Start difference. First operand 135 states and 212 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:35:01,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:35:01,302 INFO L93 Difference]: Finished difference Result 252 states and 397 transitions. [2023-04-01 04:35:01,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 04:35:01,302 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2023-04-01 04:35:01,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:35:01,306 INFO L225 Difference]: With dead ends: 252 [2023-04-01 04:35:01,306 INFO L226 Difference]: Without dead ends: 237 [2023-04-01 04:35:01,307 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 18.8s TimeCoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2023-04-01 04:35:01,309 INFO L413 NwaCegarLoop]: 281 mSDtfsCounter, 346 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 346 SdHoareTripleChecker+Valid, 699 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 04:35:01,309 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [346 Valid, 699 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 04:35:01,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2023-04-01 04:35:01,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 215. [2023-04-01 04:35:01,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 211 states have (on average 1.6398104265402844) internal successors, (346), 211 states have internal predecessors, (346), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:35:01,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 349 transitions. [2023-04-01 04:35:01,325 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 349 transitions. Word has length 26 [2023-04-01 04:35:01,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:35:01,325 INFO L495 AbstractCegarLoop]: Abstraction has 215 states and 349 transitions. [2023-04-01 04:35:01,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:35:01,325 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 349 transitions. [2023-04-01 04:35:01,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-04-01 04:35:01,328 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:35:01,329 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 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 04:35:01,339 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 04:35:01,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-04-01 04:35:01,536 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:35:01,537 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:35:01,537 INFO L85 PathProgramCache]: Analyzing trace with hash -889352035, now seen corresponding path program 1 times [2023-04-01 04:35:01,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:35:01,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124863945] [2023-04-01 04:35:01,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:35:01,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:35:01,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:35:01,774 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:35:01,774 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:35:01,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124863945] [2023-04-01 04:35:01,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124863945] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:35:01,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134144669] [2023-04-01 04:35:01,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:35:01,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:35:01,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:35:01,776 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) [2023-04-01 04:35:01,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 04:35:01,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:35:01,835 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 9 conjunts are in the unsatisfiable core [2023-04-01 04:35:01,836 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:35:01,936 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:35:01,937 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:35:02,085 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:35:02,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134144669] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 04:35:02,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1298564244] [2023-04-01 04:35:02,088 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-04-01 04:35:02,088 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 04:35:02,088 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 04:35:02,088 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 04:35:02,089 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 04:35:02,134 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 29 for LOIs [2023-04-01 04:35:07,375 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 28 for LOIs [2023-04-01 04:35:07,382 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 04:35:27,264 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2996#(and (<= main_~P6~0 2147483647) (= (+ main_~this_buffer_empty~0 main_~this_expect~0) 1) (<= 1 |#StackHeapBarrier|) (= 6 ~m_recv_ack_1_1~0) (= 2 ~m_msg_2~0) (= main_~P3~0 0) (= ~m_msg_1_1~0 4) (<= 0 (+ main_~P4~0 2147483648)) (<= 0 (+ main_~this_buffer_empty~0 1)) (= 7 ~m_recv_ack_1_2~0) (<= 0 (+ main_~P7~0 2147483648)) (<= main_~P4~0 2147483647) (= ~m_msg_1_2~0 5) (<= 0 (+ main_~P6~0 2147483648)) (= main_~q~0 3) (= ~m_Protocol~0 1) (<= 0 (+ main_~P2~0 2147483648)) (<= main_~P9~0 2147483647) (<= 0 (+ main_~P9~0 2147483648)) (= main_~P1~0 0) (<= main_~this_buffer_empty~0 1) (not (= (mod (+ main_~this_expect~0 1) 2) 0)) (<= 0 (+ main_~P5~0 2147483648)) (<= main_~P5~0 2147483647) (= 3 ~m_recv_ack_2~0) (= |#NULL.offset| 0) (= main_~method_id~0 3) (<= 0 (+ main_~P8~0 2147483648)) (<= main_~P7~0 2147483647) (<= main_~P8~0 2147483647) (<= main_~P2~0 2147483647) (= |#NULL.base| 0))' at error location [2023-04-01 04:35:27,264 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 04:35:27,264 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 04:35:27,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 6] total 10 [2023-04-01 04:35:27,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445189508] [2023-04-01 04:35:27,265 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 04:35:27,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-04-01 04:35:27,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:35:27,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-04-01 04:35:27,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=735, Unknown=0, NotChecked=0, Total=870 [2023-04-01 04:35:27,266 INFO L87 Difference]: Start difference. First operand 215 states and 349 transitions. Second operand has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:35:27,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:35:27,456 INFO L93 Difference]: Finished difference Result 239 states and 381 transitions. [2023-04-01 04:35:27,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 04:35:27,456 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2023-04-01 04:35:27,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:35:27,457 INFO L225 Difference]: With dead ends: 239 [2023-04-01 04:35:27,458 INFO L226 Difference]: Without dead ends: 235 [2023-04-01 04:35:27,458 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 19.9s TimeCoverageRelationStatistics Valid=135, Invalid=735, Unknown=0, NotChecked=0, Total=870 [2023-04-01 04:35:27,459 INFO L413 NwaCegarLoop]: 176 mSDtfsCounter, 36 mSDsluCounter, 846 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 1022 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 04:35:27,459 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 1022 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 04:35:27,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2023-04-01 04:35:27,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 233. [2023-04-01 04:35:27,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 229 states have (on average 1.6200873362445414) internal successors, (371), 229 states have internal predecessors, (371), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:35:27,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 374 transitions. [2023-04-01 04:35:27,470 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 374 transitions. Word has length 27 [2023-04-01 04:35:27,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:35:27,471 INFO L495 AbstractCegarLoop]: Abstraction has 233 states and 374 transitions. [2023-04-01 04:35:27,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:35:27,472 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 374 transitions. [2023-04-01 04:35:27,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-04-01 04:35:27,475 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:35:27,475 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:35:27,484 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 04:35:27,681 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,SelfDestructingSolverStorable6 [2023-04-01 04:35:27,682 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:35:27,682 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:35:27,683 INFO L85 PathProgramCache]: Analyzing trace with hash -125550813, now seen corresponding path program 1 times [2023-04-01 04:35:27,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:35:27,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267902696] [2023-04-01 04:35:27,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:35:27,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:35:27,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:35:27,736 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-01 04:35:27,736 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:35:27,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267902696] [2023-04-01 04:35:27,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267902696] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:35:27,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:35:27,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 04:35:27,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525244803] [2023-04-01 04:35:27,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:35:27,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:35:27,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:35:27,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:35:27,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:35:27,738 INFO L87 Difference]: Start difference. First operand 233 states and 374 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:35:27,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:35:27,765 INFO L93 Difference]: Finished difference Result 432 states and 692 transitions. [2023-04-01 04:35:27,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 04:35:27,765 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2023-04-01 04:35:27,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:35:27,767 INFO L225 Difference]: With dead ends: 432 [2023-04-01 04:35:27,767 INFO L226 Difference]: Without dead ends: 205 [2023-04-01 04:35:27,767 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 04:35:27,768 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 69 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 04:35:27,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 209 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 04:35:27,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2023-04-01 04:35:27,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 203. [2023-04-01 04:35:27,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 199 states have (on average 1.5678391959798994) internal successors, (312), 199 states have internal predecessors, (312), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:35:27,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 315 transitions. [2023-04-01 04:35:27,774 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 315 transitions. Word has length 33 [2023-04-01 04:35:27,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:35:27,775 INFO L495 AbstractCegarLoop]: Abstraction has 203 states and 315 transitions. [2023-04-01 04:35:27,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:35:27,775 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 315 transitions. [2023-04-01 04:35:27,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-04-01 04:35:27,776 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:35:27,776 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:35:27,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-01 04:35:27,776 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:35:27,776 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:35:27,777 INFO L85 PathProgramCache]: Analyzing trace with hash 104627428, now seen corresponding path program 1 times [2023-04-01 04:35:27,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:35:27,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679490444] [2023-04-01 04:35:27,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:35:27,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:35:27,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:35:28,004 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 04:35:28,004 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:35:28,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679490444] [2023-04-01 04:35:28,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679490444] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:35:28,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970593019] [2023-04-01 04:35:28,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:35:28,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:35:28,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:35:28,006 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) [2023-04-01 04:35:28,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 04:35:28,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:35:28,074 INFO L262 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 15 conjunts are in the unsatisfiable core [2023-04-01 04:35:28,076 INFO L285 TraceCheckSpWp]: Computing forward predicates...