/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 IntervalDomain -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 00:23:28,140 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 00:23:28,142 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 00:23:28,169 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-04-01 00:23:28,189 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 00:23:28,193 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 00:23:28,194 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 00:23:28,195 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 00:23:28,196 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 00:23:28,197 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 00:23:28,199 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 00:23:28,206 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 00:23:28,207 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 00:23:28,208 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 00:23:28,210 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 00:23:28,211 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 00:23:28,215 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-01 00:23:28,223 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 00:23:28,223 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 00:23:28,224 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 00:23:28,225 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 00:23:28,261 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 00:23:28,261 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 00:23:28,262 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 00:23:28,262 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 00:23:28,263 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 00:23:28,263 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 00:23:28,263 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 00:23:28,263 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 00:23:28,263 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 00:23:28,264 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 00:23:28,264 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 00:23:28,265 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 00:23:28,265 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 00:23:28,265 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 00:23:28,265 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 00:23:28,265 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 00:23:28,265 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 00:23:28,265 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 00:23:28,266 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 00:23:28,266 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 00:23:28,266 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 00:23:28,266 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 00:23:28,266 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 00:23:28,266 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 00:23:28,267 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 00:23:28,267 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 00:23:28,267 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 00:23:28,267 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 00:23:28,267 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 00:23:28,267 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 00:23:28,268 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 00:23:28,268 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 00:23:28,268 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 00:23:28,268 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 00:23:28,268 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 00:23:28,268 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 00:23:28,269 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 00:23:28,269 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 00:23:28,269 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 00:23:28,269 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 00:23:28,269 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 00:23:28,269 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-04-01 00:23:28,503 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 00:23:28,524 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 00:23:28,527 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 00:23:28,528 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 00:23:28,529 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 00:23:28,530 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-04-01 00:23:29,729 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 00:23:29,933 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 00:23:29,934 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-04-01 00:23:29,950 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a57cced89/3b1173e0be2149988e9af2ea60743351/FLAG17702e7c0 [2023-04-01 00:23:29,964 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a57cced89/3b1173e0be2149988e9af2ea60743351 [2023-04-01 00:23:29,969 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 00:23:29,970 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 00:23:29,971 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 00:23:29,972 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 00:23:29,974 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 00:23:29,975 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:23:29" (1/1) ... [2023-04-01 00:23:29,976 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4494bc76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:23:29, skipping insertion in model container [2023-04-01 00:23:29,976 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:23:29" (1/1) ... [2023-04-01 00:23:29,986 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 00:23:30,030 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 00:23:30,227 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/seq-mthreaded-reduced/pals_floodmax.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[7347,7360] [2023-04-01 00:23:30,254 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 00:23:30,271 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 00:23:30,313 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/seq-mthreaded-reduced/pals_floodmax.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[7347,7360] [2023-04-01 00:23:30,331 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 00:23:30,347 INFO L208 MainTranslator]: Completed translation [2023-04-01 00:23:30,348 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:23:30 WrapperNode [2023-04-01 00:23:30,348 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 00:23:30,349 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 00:23:30,349 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 00:23:30,349 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 00:23:30,363 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:23:30" (1/1) ... [2023-04-01 00:23:30,363 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:23:30" (1/1) ... [2023-04-01 00:23:30,378 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:23:30" (1/1) ... [2023-04-01 00:23:30,378 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:23:30" (1/1) ... [2023-04-01 00:23:30,392 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:23:30" (1/1) ... [2023-04-01 00:23:30,415 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:23:30" (1/1) ... [2023-04-01 00:23:30,419 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:23:30" (1/1) ... [2023-04-01 00:23:30,421 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:23:30" (1/1) ... [2023-04-01 00:23:30,438 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 00:23:30,439 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 00:23:30,439 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 00:23:30,439 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 00:23:30,440 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:23:30" (1/1) ... [2023-04-01 00:23:30,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 00:23:30,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 00:23:30,499 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 00:23:30,502 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 00:23:30,533 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 00:23:30,533 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 00:23:30,533 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 00:23:30,533 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 00:23:30,533 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 00:23:30,534 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 00:23:30,534 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 00:23:30,534 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 00:23:30,534 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 00:23:30,534 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-01 00:23:30,534 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2023-04-01 00:23:30,534 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-01 00:23:30,534 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-01 00:23:30,534 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 00:23:30,535 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-01 00:23:30,535 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-01 00:23:30,535 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-01 00:23:30,535 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-01 00:23:30,536 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-01 00:23:30,537 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-01 00:23:30,537 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-01 00:23:30,537 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 00:23:30,537 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 00:23:30,537 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 00:23:30,537 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 00:23:30,537 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 00:23:30,537 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 00:23:30,537 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 00:23:30,656 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 00:23:30,658 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 00:23:31,335 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 00:23:31,501 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 00:23:31,501 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-01 00:23:31,504 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:23:31 BoogieIcfgContainer [2023-04-01 00:23:31,504 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 00:23:31,507 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 00:23:31,507 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 00:23:31,510 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 00:23:31,510 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 12:23:29" (1/3) ... [2023-04-01 00:23:31,511 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f88f12b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:23:31, skipping insertion in model container [2023-04-01 00:23:31,511 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:23:30" (2/3) ... [2023-04-01 00:23:31,511 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f88f12b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:23:31, skipping insertion in model container [2023-04-01 00:23:31,511 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:23:31" (3/3) ... [2023-04-01 00:23:31,513 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-04-01 00:23:31,526 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 00:23:31,526 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 00:23:31,571 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 00:23:31,577 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;@6ad9d717, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 00:23:31,577 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 00:23:31,583 INFO L276 IsEmpty]: Start isEmpty. Operand has 98 states, 86 states have (on average 1.755813953488372) internal successors, (151), 93 states have internal predecessors, (151), 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 00:23:31,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-04-01 00:23:31,593 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:23:31,594 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] [2023-04-01 00:23:31,595 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:23:31,602 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:23:31,603 INFO L85 PathProgramCache]: Analyzing trace with hash -285522315, now seen corresponding path program 1 times [2023-04-01 00:23:31,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:23:31,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437985896] [2023-04-01 00:23:31,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:23:31,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:23:31,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:23:32,083 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 00:23:32,084 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:23:32,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437985896] [2023-04-01 00:23:32,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437985896] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:23:32,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:23:32,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 00:23:32,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863542340] [2023-04-01 00:23:32,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:23:32,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 00:23:32,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:23:32,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 00:23:32,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 00:23:32,141 INFO L87 Difference]: Start difference. First operand has 98 states, 86 states have (on average 1.755813953488372) internal successors, (151), 93 states have internal predecessors, (151), 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 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 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 00:23:32,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:23:32,267 INFO L93 Difference]: Finished difference Result 216 states and 324 transitions. [2023-04-01 00:23:32,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 00:23:32,270 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 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 41 [2023-04-01 00:23:32,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:23:32,281 INFO L225 Difference]: With dead ends: 216 [2023-04-01 00:23:32,281 INFO L226 Difference]: Without dead ends: 131 [2023-04-01 00:23:32,285 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 00:23:32,290 INFO L413 NwaCegarLoop]: 216 mSDtfsCounter, 96 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 00:23:32,291 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 334 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 00:23:32,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2023-04-01 00:23:32,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 129. [2023-04-01 00:23:32,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 125 states have (on average 1.416) internal successors, (177), 125 states have internal predecessors, (177), 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 00:23:32,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 180 transitions. [2023-04-01 00:23:32,332 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 180 transitions. Word has length 41 [2023-04-01 00:23:32,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:23:32,332 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 180 transitions. [2023-04-01 00:23:32,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 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 00:23:32,333 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 180 transitions. [2023-04-01 00:23:32,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-04-01 00:23:32,334 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:23:32,334 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] [2023-04-01 00:23:32,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 00:23:32,335 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:23:32,335 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:23:32,336 INFO L85 PathProgramCache]: Analyzing trace with hash 155439974, now seen corresponding path program 1 times [2023-04-01 00:23:32,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:23:32,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596089534] [2023-04-01 00:23:32,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:23:32,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:23:32,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:23:32,555 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 00:23:32,556 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:23:32,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596089534] [2023-04-01 00:23:32,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596089534] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:23:32,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:23:32,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 00:23:32,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431644448] [2023-04-01 00:23:32,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:23:32,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 00:23:32,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:23:32,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 00:23:32,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 00:23:32,561 INFO L87 Difference]: Start difference. First operand 129 states and 180 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 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 00:23:32,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:23:32,657 INFO L93 Difference]: Finished difference Result 280 states and 411 transitions. [2023-04-01 00:23:32,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 00:23:32,658 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 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 43 [2023-04-01 00:23:32,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:23:32,665 INFO L225 Difference]: With dead ends: 280 [2023-04-01 00:23:32,669 INFO L226 Difference]: Without dead ends: 184 [2023-04-01 00:23:32,670 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 00:23:32,671 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 79 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 00:23:32,672 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 186 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 00:23:32,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2023-04-01 00:23:32,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 182. [2023-04-01 00:23:32,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 178 states have (on average 1.4382022471910112) internal successors, (256), 178 states have internal predecessors, (256), 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 00:23:32,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 259 transitions. [2023-04-01 00:23:32,708 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 259 transitions. Word has length 43 [2023-04-01 00:23:32,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:23:32,709 INFO L495 AbstractCegarLoop]: Abstraction has 182 states and 259 transitions. [2023-04-01 00:23:32,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 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 00:23:32,709 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 259 transitions. [2023-04-01 00:23:32,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-04-01 00:23:32,712 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:23:32,712 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] [2023-04-01 00:23:32,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 00:23:32,713 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:23:32,714 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:23:32,714 INFO L85 PathProgramCache]: Analyzing trace with hash -2142942349, now seen corresponding path program 1 times [2023-04-01 00:23:32,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:23:32,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550358407] [2023-04-01 00:23:32,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:23:32,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:23:32,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:23:32,877 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 00:23:32,877 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:23:32,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550358407] [2023-04-01 00:23:32,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550358407] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:23:32,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:23:32,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 00:23:32,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226460406] [2023-04-01 00:23:32,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:23:32,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 00:23:32,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:23:32,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 00:23:32,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 00:23:32,881 INFO L87 Difference]: Start difference. First operand 182 states and 259 transitions. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 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 00:23:32,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:23:32,943 INFO L93 Difference]: Finished difference Result 442 states and 652 transitions. [2023-04-01 00:23:32,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 00:23:32,944 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 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 45 [2023-04-01 00:23:32,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:23:32,946 INFO L225 Difference]: With dead ends: 442 [2023-04-01 00:23:32,946 INFO L226 Difference]: Without dead ends: 294 [2023-04-01 00:23:32,953 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 00:23:32,956 INFO L413 NwaCegarLoop]: 148 mSDtfsCounter, 79 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 00:23:32,958 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 235 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 00:23:32,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2023-04-01 00:23:33,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 292. [2023-04-01 00:23:33,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 288 states have (on average 1.4583333333333333) internal successors, (420), 288 states have internal predecessors, (420), 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 00:23:33,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 423 transitions. [2023-04-01 00:23:33,004 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 423 transitions. Word has length 45 [2023-04-01 00:23:33,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:23:33,005 INFO L495 AbstractCegarLoop]: Abstraction has 292 states and 423 transitions. [2023-04-01 00:23:33,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 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 00:23:33,005 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 423 transitions. [2023-04-01 00:23:33,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-04-01 00:23:33,010 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:23:33,010 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] [2023-04-01 00:23:33,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 00:23:33,011 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:23:33,012 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:23:33,012 INFO L85 PathProgramCache]: Analyzing trace with hash -340698257, now seen corresponding path program 1 times [2023-04-01 00:23:33,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:23:33,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3188951] [2023-04-01 00:23:33,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:23:33,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:23:33,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:23:33,131 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 00:23:33,132 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:23:33,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3188951] [2023-04-01 00:23:33,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3188951] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:23:33,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:23:33,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 00:23:33,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42552073] [2023-04-01 00:23:33,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:23:33,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 00:23:33,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:23:33,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 00:23:33,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 00:23:33,134 INFO L87 Difference]: Start difference. First operand 292 states and 423 transitions. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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 00:23:33,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:23:33,204 INFO L93 Difference]: Finished difference Result 711 states and 1056 transitions. [2023-04-01 00:23:33,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 00:23:33,205 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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 47 [2023-04-01 00:23:33,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:23:33,210 INFO L225 Difference]: With dead ends: 711 [2023-04-01 00:23:33,210 INFO L226 Difference]: Without dead ends: 453 [2023-04-01 00:23:33,211 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 00:23:33,220 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 78 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 00:23:33,221 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 203 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 00:23:33,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2023-04-01 00:23:33,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 451. [2023-04-01 00:23:33,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 451 states, 447 states have (on average 1.476510067114094) internal successors, (660), 447 states have internal predecessors, (660), 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 00:23:33,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 663 transitions. [2023-04-01 00:23:33,268 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 663 transitions. Word has length 47 [2023-04-01 00:23:33,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:23:33,269 INFO L495 AbstractCegarLoop]: Abstraction has 451 states and 663 transitions. [2023-04-01 00:23:33,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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 00:23:33,269 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 663 transitions. [2023-04-01 00:23:33,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-04-01 00:23:33,270 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:23:33,271 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] [2023-04-01 00:23:33,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 00:23:33,271 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:23:33,271 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:23:33,271 INFO L85 PathProgramCache]: Analyzing trace with hash -1823786302, now seen corresponding path program 1 times [2023-04-01 00:23:33,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:23:33,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124954599] [2023-04-01 00:23:33,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:23:33,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:23:33,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:23:33,381 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 00:23:33,381 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:23:33,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124954599] [2023-04-01 00:23:33,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124954599] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:23:33,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:23:33,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 00:23:33,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197421167] [2023-04-01 00:23:33,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:23:33,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 00:23:33,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:23:33,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 00:23:33,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 00:23:33,387 INFO L87 Difference]: Start difference. First operand 451 states and 663 transitions. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 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 00:23:33,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:23:33,527 INFO L93 Difference]: Finished difference Result 1151 states and 1712 transitions. [2023-04-01 00:23:33,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 00:23:33,528 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 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 49 [2023-04-01 00:23:33,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:23:33,534 INFO L225 Difference]: With dead ends: 1151 [2023-04-01 00:23:33,534 INFO L226 Difference]: Without dead ends: 747 [2023-04-01 00:23:33,535 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 00:23:33,536 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 74 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 00:23:33,536 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 216 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 00:23:33,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 747 states. [2023-04-01 00:23:33,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 747 to 745. [2023-04-01 00:23:33,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 745 states, 741 states have (on average 1.4696356275303644) internal successors, (1089), 741 states have internal predecessors, (1089), 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 00:23:33,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 745 states to 745 states and 1092 transitions. [2023-04-01 00:23:33,619 INFO L78 Accepts]: Start accepts. Automaton has 745 states and 1092 transitions. Word has length 49 [2023-04-01 00:23:33,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:23:33,621 INFO L495 AbstractCegarLoop]: Abstraction has 745 states and 1092 transitions. [2023-04-01 00:23:33,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 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 00:23:33,621 INFO L276 IsEmpty]: Start isEmpty. Operand 745 states and 1092 transitions. [2023-04-01 00:23:33,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-04-01 00:23:33,622 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:23:33,623 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] [2023-04-01 00:23:33,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 00:23:33,623 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:23:33,623 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:23:33,623 INFO L85 PathProgramCache]: Analyzing trace with hash 1467766441, now seen corresponding path program 1 times [2023-04-01 00:23:33,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:23:33,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045884812] [2023-04-01 00:23:33,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:23:33,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:23:33,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:23:33,755 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 00:23:33,755 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:23:33,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045884812] [2023-04-01 00:23:33,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045884812] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:23:33,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:23:33,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 00:23:33,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972857392] [2023-04-01 00:23:33,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:23:33,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 00:23:33,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:23:33,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 00:23:33,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 00:23:33,757 INFO L87 Difference]: Start difference. First operand 745 states and 1092 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 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 00:23:33,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:23:33,914 INFO L93 Difference]: Finished difference Result 1860 states and 2760 transitions. [2023-04-01 00:23:33,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 00:23:33,915 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 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 51 [2023-04-01 00:23:33,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:23:33,920 INFO L225 Difference]: With dead ends: 1860 [2023-04-01 00:23:33,920 INFO L226 Difference]: Without dead ends: 1162 [2023-04-01 00:23:33,922 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 00:23:33,923 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 73 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 00:23:33,923 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 205 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 00:23:33,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1162 states. [2023-04-01 00:23:34,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1162 to 1160. [2023-04-01 00:23:34,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1160 states, 1156 states have (on average 1.4775086505190311) internal successors, (1708), 1156 states have internal predecessors, (1708), 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 00:23:34,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1160 states to 1160 states and 1711 transitions. [2023-04-01 00:23:34,083 INFO L78 Accepts]: Start accepts. Automaton has 1160 states and 1711 transitions. Word has length 51 [2023-04-01 00:23:34,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:23:34,083 INFO L495 AbstractCegarLoop]: Abstraction has 1160 states and 1711 transitions. [2023-04-01 00:23:34,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 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 00:23:34,083 INFO L276 IsEmpty]: Start isEmpty. Operand 1160 states and 1711 transitions. [2023-04-01 00:23:34,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-04-01 00:23:34,084 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:23:34,084 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] [2023-04-01 00:23:34,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-01 00:23:34,084 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:23:34,085 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:23:34,085 INFO L85 PathProgramCache]: Analyzing trace with hash -1266528778, now seen corresponding path program 1 times [2023-04-01 00:23:34,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:23:34,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203003015] [2023-04-01 00:23:34,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:23:34,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:23:34,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:23:34,200 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 00:23:34,201 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:23:34,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203003015] [2023-04-01 00:23:34,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203003015] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:23:34,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:23:34,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 00:23:34,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036016242] [2023-04-01 00:23:34,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:23:34,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 00:23:34,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:23:34,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 00:23:34,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 00:23:34,202 INFO L87 Difference]: Start difference. First operand 1160 states and 1711 transitions. Second operand has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 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 00:23:34,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:23:34,621 INFO L93 Difference]: Finished difference Result 2935 states and 4364 transitions. [2023-04-01 00:23:34,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 00:23:34,622 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 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 53 [2023-04-01 00:23:34,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:23:34,630 INFO L225 Difference]: With dead ends: 2935 [2023-04-01 00:23:34,630 INFO L226 Difference]: Without dead ends: 1817 [2023-04-01 00:23:34,632 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-04-01 00:23:34,633 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 435 mSDsluCounter, 689 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 435 SdHoareTripleChecker+Valid, 807 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 00:23:34,634 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [435 Valid, 807 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 00:23:34,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1817 states. [2023-04-01 00:23:34,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1817 to 1791. [2023-04-01 00:23:34,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1791 states, 1787 states have (on average 1.4868494683827644) internal successors, (2657), 1787 states have internal predecessors, (2657), 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 00:23:34,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1791 states to 1791 states and 2660 transitions. [2023-04-01 00:23:34,860 INFO L78 Accepts]: Start accepts. Automaton has 1791 states and 2660 transitions. Word has length 53 [2023-04-01 00:23:34,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:23:34,861 INFO L495 AbstractCegarLoop]: Abstraction has 1791 states and 2660 transitions. [2023-04-01 00:23:34,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 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 00:23:34,861 INFO L276 IsEmpty]: Start isEmpty. Operand 1791 states and 2660 transitions. [2023-04-01 00:23:34,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-04-01 00:23:34,862 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:23:34,862 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] [2023-04-01 00:23:34,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-01 00:23:34,862 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:23:34,863 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:23:34,863 INFO L85 PathProgramCache]: Analyzing trace with hash -669296904, now seen corresponding path program 1 times [2023-04-01 00:23:34,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:23:34,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246165861] [2023-04-01 00:23:34,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:23:34,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:23:34,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:23:34,991 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 00:23:34,991 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:23:34,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246165861] [2023-04-01 00:23:34,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246165861] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:23:34,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:23:34,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 00:23:34,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086843895] [2023-04-01 00:23:34,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:23:34,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 00:23:34,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:23:34,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 00:23:34,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 00:23:34,993 INFO L87 Difference]: Start difference. First operand 1791 states and 2660 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 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 00:23:35,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:23:35,279 INFO L93 Difference]: Finished difference Result 3524 states and 5249 transitions. [2023-04-01 00:23:35,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 00:23:35,280 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 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 54 [2023-04-01 00:23:35,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:23:35,287 INFO L225 Difference]: With dead ends: 3524 [2023-04-01 00:23:35,287 INFO L226 Difference]: Without dead ends: 1793 [2023-04-01 00:23:35,290 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-01 00:23:35,291 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 144 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 00:23:35,292 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 299 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 00:23:35,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1793 states. [2023-04-01 00:23:35,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1793 to 1788. [2023-04-01 00:23:35,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1788 states, 1784 states have (on average 1.4809417040358743) internal successors, (2642), 1784 states have internal predecessors, (2642), 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 00:23:35,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1788 states to 1788 states and 2645 transitions. [2023-04-01 00:23:35,491 INFO L78 Accepts]: Start accepts. Automaton has 1788 states and 2645 transitions. Word has length 54 [2023-04-01 00:23:35,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:23:35,492 INFO L495 AbstractCegarLoop]: Abstraction has 1788 states and 2645 transitions. [2023-04-01 00:23:35,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 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 00:23:35,492 INFO L276 IsEmpty]: Start isEmpty. Operand 1788 states and 2645 transitions. [2023-04-01 00:23:35,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-04-01 00:23:35,493 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:23:35,493 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] [2023-04-01 00:23:35,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-01 00:23:35,493 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:23:35,494 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:23:35,494 INFO L85 PathProgramCache]: Analyzing trace with hash -1488720500, now seen corresponding path program 1 times [2023-04-01 00:23:35,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:23:35,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514591603] [2023-04-01 00:23:35,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:23:35,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:23:35,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:23:35,884 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 00:23:35,885 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:23:35,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514591603] [2023-04-01 00:23:35,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514591603] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:23:35,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:23:35,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 00:23:35,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671992496] [2023-04-01 00:23:35,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:23:35,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 00:23:35,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:23:35,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 00:23:35,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 00:23:35,888 INFO L87 Difference]: Start difference. First operand 1788 states and 2645 transitions. Second operand has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 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 00:23:36,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:23:36,288 INFO L93 Difference]: Finished difference Result 2956 states and 4320 transitions. [2023-04-01 00:23:36,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 00:23:36,289 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 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 62 [2023-04-01 00:23:36,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:23:36,300 INFO L225 Difference]: With dead ends: 2956 [2023-04-01 00:23:36,300 INFO L226 Difference]: Without dead ends: 2954 [2023-04-01 00:23:36,304 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 00:23:36,306 INFO L413 NwaCegarLoop]: 181 mSDtfsCounter, 146 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 584 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 00:23:36,306 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 584 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 00:23:36,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2954 states. [2023-04-01 00:23:36,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2954 to 1832. [2023-04-01 00:23:36,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1832 states, 1828 states have (on average 1.4567833698030634) internal successors, (2663), 1828 states have internal predecessors, (2663), 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 00:23:36,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1832 states to 1832 states and 2666 transitions. [2023-04-01 00:23:36,559 INFO L78 Accepts]: Start accepts. Automaton has 1832 states and 2666 transitions. Word has length 62 [2023-04-01 00:23:36,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:23:36,559 INFO L495 AbstractCegarLoop]: Abstraction has 1832 states and 2666 transitions. [2023-04-01 00:23:36,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 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 00:23:36,560 INFO L276 IsEmpty]: Start isEmpty. Operand 1832 states and 2666 transitions. [2023-04-01 00:23:36,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-04-01 00:23:36,561 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:23:36,561 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:23:36,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-01 00:23:36,561 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:23:36,562 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:23:36,562 INFO L85 PathProgramCache]: Analyzing trace with hash -954306733, now seen corresponding path program 1 times [2023-04-01 00:23:36,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:23:36,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801667284] [2023-04-01 00:23:36,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:23:36,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:23:36,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:23:37,655 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 00:23:37,655 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:23:37,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801667284] [2023-04-01 00:23:37,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801667284] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 00:23:37,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927555110] [2023-04-01 00:23:37,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:23:37,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 00:23:37,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 00:23:37,659 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 00:23:37,684 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 00:23:37,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:23:37,892 INFO L262 TraceCheckSpWp]: Trace formula consists of 788 conjuncts, 21 conjunts are in the unsatisfiable core [2023-04-01 00:23:37,900 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 00:23:38,601 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 00:23:38,601 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 00:23:38,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927555110] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:23:38,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 00:23:38,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2023-04-01 00:23:38,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595324452] [2023-04-01 00:23:38,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:23:38,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 00:23:38,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:23:38,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 00:23:38,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2023-04-01 00:23:38,603 INFO L87 Difference]: Start difference. First operand 1832 states and 2666 transitions. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 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 00:23:39,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:23:39,429 INFO L93 Difference]: Finished difference Result 5276 states and 7704 transitions. [2023-04-01 00:23:39,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 00:23:39,430 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 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 69 [2023-04-01 00:23:39,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:23:39,444 INFO L225 Difference]: With dead ends: 5276 [2023-04-01 00:23:39,445 INFO L226 Difference]: Without dead ends: 3504 [2023-04-01 00:23:39,449 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2023-04-01 00:23:39,450 INFO L413 NwaCegarLoop]: 178 mSDtfsCounter, 246 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 00:23:39,451 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [246 Valid, 298 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 00:23:39,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3504 states. [2023-04-01 00:23:40,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3504 to 3502. [2023-04-01 00:23:40,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3502 states, 3498 states have (on average 1.452544311034877) internal successors, (5081), 3498 states have internal predecessors, (5081), 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 00:23:40,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3502 states to 3502 states and 5084 transitions. [2023-04-01 00:23:40,210 INFO L78 Accepts]: Start accepts. Automaton has 3502 states and 5084 transitions. Word has length 69 [2023-04-01 00:23:40,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:23:40,210 INFO L495 AbstractCegarLoop]: Abstraction has 3502 states and 5084 transitions. [2023-04-01 00:23:40,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 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 00:23:40,210 INFO L276 IsEmpty]: Start isEmpty. Operand 3502 states and 5084 transitions. [2023-04-01 00:23:40,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-04-01 00:23:40,211 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:23:40,211 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:23:40,229 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 00:23:40,423 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,SelfDestructingSolverStorable9 [2023-04-01 00:23:40,424 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:23:40,424 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:23:40,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1917808232, now seen corresponding path program 1 times [2023-04-01 00:23:40,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:23:40,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023966548] [2023-04-01 00:23:40,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:23:40,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:23:40,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:23:41,195 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 00:23:41,195 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:23:41,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023966548] [2023-04-01 00:23:41,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023966548] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 00:23:41,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587620043] [2023-04-01 00:23:41,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:23:41,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 00:23:41,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 00:23:41,197 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 00:23:41,199 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 00:23:41,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:23:41,388 INFO L262 TraceCheckSpWp]: Trace formula consists of 794 conjuncts, 21 conjunts are in the unsatisfiable core [2023-04-01 00:23:41,391 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 00:23:41,728 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 00:23:41,729 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 00:23:41,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587620043] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:23:41,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 00:23:41,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2023-04-01 00:23:41,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830543033] [2023-04-01 00:23:41,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:23:41,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 00:23:41,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:23:41,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 00:23:41,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2023-04-01 00:23:41,731 INFO L87 Difference]: Start difference. First operand 3502 states and 5084 transitions. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 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 00:23:43,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:23:43,273 INFO L93 Difference]: Finished difference Result 10137 states and 14732 transitions. [2023-04-01 00:23:43,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 00:23:43,274 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 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 72 [2023-04-01 00:23:43,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:23:43,300 INFO L225 Difference]: With dead ends: 10137 [2023-04-01 00:23:43,300 INFO L226 Difference]: Without dead ends: 6680 [2023-04-01 00:23:43,308 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2023-04-01 00:23:43,309 INFO L413 NwaCegarLoop]: 180 mSDtfsCounter, 259 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 00:23:43,309 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [259 Valid, 297 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 00:23:43,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6680 states. [2023-04-01 00:23:44,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6680 to 6678. [2023-04-01 00:23:44,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6678 states, 6674 states have (on average 1.4420137848366796) internal successors, (9624), 6674 states have internal predecessors, (9624), 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 00:23:44,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6678 states to 6678 states and 9627 transitions. [2023-04-01 00:23:44,320 INFO L78 Accepts]: Start accepts. Automaton has 6678 states and 9627 transitions. Word has length 72 [2023-04-01 00:23:44,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:23:44,320 INFO L495 AbstractCegarLoop]: Abstraction has 6678 states and 9627 transitions. [2023-04-01 00:23:44,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 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 00:23:44,320 INFO L276 IsEmpty]: Start isEmpty. Operand 6678 states and 9627 transitions. [2023-04-01 00:23:44,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-04-01 00:23:44,321 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:23:44,322 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:23:44,329 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 00:23:44,529 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,SelfDestructingSolverStorable10 [2023-04-01 00:23:44,529 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:23:44,529 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:23:44,530 INFO L85 PathProgramCache]: Analyzing trace with hash -70523277, now seen corresponding path program 1 times [2023-04-01 00:23:44,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:23:44,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117554750] [2023-04-01 00:23:44,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:23:44,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:23:44,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:23:45,302 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 00:23:45,302 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:23:45,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117554750] [2023-04-01 00:23:45,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117554750] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 00:23:45,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152571819] [2023-04-01 00:23:45,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:23:45,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 00:23:45,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 00:23:45,304 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 00:23:45,306 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 00:23:45,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:23:45,518 INFO L262 TraceCheckSpWp]: Trace formula consists of 800 conjuncts, 21 conjunts are in the unsatisfiable core [2023-04-01 00:23:45,528 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 00:23:45,851 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 00:23:45,852 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 00:23:45,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152571819] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:23:45,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 00:23:45,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2023-04-01 00:23:45,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817046129] [2023-04-01 00:23:45,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:23:45,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 00:23:45,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:23:45,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 00:23:45,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2023-04-01 00:23:45,854 INFO L87 Difference]: Start difference. First operand 6678 states and 9627 transitions. Second operand has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 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 00:23:48,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:23:48,088 INFO L93 Difference]: Finished difference Result 19428 states and 28009 transitions. [2023-04-01 00:23:48,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 00:23:48,089 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 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 75 [2023-04-01 00:23:48,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:23:48,138 INFO L225 Difference]: With dead ends: 19428 [2023-04-01 00:23:48,138 INFO L226 Difference]: Without dead ends: 12822 [2023-04-01 00:23:48,151 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2023-04-01 00:23:48,152 INFO L413 NwaCegarLoop]: 180 mSDtfsCounter, 249 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 00:23:48,152 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [249 Valid, 299 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 00:23:48,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12822 states. [2023-04-01 00:23:50,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12822 to 12820. [2023-04-01 00:23:50,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12820 states, 12816 states have (on average 1.4318039950062422) internal successors, (18350), 12816 states have internal predecessors, (18350), 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 00:23:50,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12820 states to 12820 states and 18353 transitions. [2023-04-01 00:23:50,389 INFO L78 Accepts]: Start accepts. Automaton has 12820 states and 18353 transitions. Word has length 75 [2023-04-01 00:23:50,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:23:50,389 INFO L495 AbstractCegarLoop]: Abstraction has 12820 states and 18353 transitions. [2023-04-01 00:23:50,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 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 00:23:50,389 INFO L276 IsEmpty]: Start isEmpty. Operand 12820 states and 18353 transitions. [2023-04-01 00:23:50,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-04-01 00:23:50,391 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:23:50,391 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:23:50,403 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 00:23:50,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 00:23:50,600 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:23:50,600 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:23:50,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1438491322, now seen corresponding path program 1 times [2023-04-01 00:23:50,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:23:50,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804122062] [2023-04-01 00:23:50,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:23:50,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:23:50,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:23:51,235 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 00:23:51,236 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:23:51,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804122062] [2023-04-01 00:23:51,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804122062] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 00:23:51,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264584960] [2023-04-01 00:23:51,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:23:51,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 00:23:51,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 00:23:51,238 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 00:23:51,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 00:23:51,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:23:51,432 INFO L262 TraceCheckSpWp]: Trace formula consists of 806 conjuncts, 22 conjunts are in the unsatisfiable core [2023-04-01 00:23:51,437 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 00:23:52,038 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 00:23:52,039 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 00:23:52,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264584960] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:23:52,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 00:23:52,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2023-04-01 00:23:52,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020829044] [2023-04-01 00:23:52,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:23:52,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 00:23:52,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:23:52,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 00:23:52,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2023-04-01 00:23:52,043 INFO L87 Difference]: Start difference. First operand 12820 states and 18353 transitions. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 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 00:23:53,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:23:53,842 INFO L93 Difference]: Finished difference Result 22690 states and 32422 transitions. [2023-04-01 00:23:53,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 00:23:53,843 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 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 78 [2023-04-01 00:23:53,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:23:53,871 INFO L225 Difference]: With dead ends: 22690 [2023-04-01 00:23:53,871 INFO L226 Difference]: Without dead ends: 9950 [2023-04-01 00:23:53,896 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2023-04-01 00:23:53,896 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 506 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 506 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 00:23:53,897 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [506 Valid, 221 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 00:23:53,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9950 states. [2023-04-01 00:23:55,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9950 to 9889. [2023-04-01 00:23:55,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9889 states, 9885 states have (on average 1.4267071320182094) internal successors, (14103), 9885 states have internal predecessors, (14103), 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 00:23:55,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9889 states to 9889 states and 14106 transitions. [2023-04-01 00:23:55,518 INFO L78 Accepts]: Start accepts. Automaton has 9889 states and 14106 transitions. Word has length 78 [2023-04-01 00:23:55,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:23:55,518 INFO L495 AbstractCegarLoop]: Abstraction has 9889 states and 14106 transitions. [2023-04-01 00:23:55,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 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 00:23:55,519 INFO L276 IsEmpty]: Start isEmpty. Operand 9889 states and 14106 transitions. [2023-04-01 00:23:55,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-04-01 00:23:55,520 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:23:55,520 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:23:55,529 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-04-01 00:23:55,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 00:23:55,729 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:23:55,730 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:23:55,730 INFO L85 PathProgramCache]: Analyzing trace with hash 1390334385, now seen corresponding path program 1 times [2023-04-01 00:23:55,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:23:55,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136844486] [2023-04-01 00:23:55,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:23:55,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:23:55,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:23:55,843 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 00:23:55,843 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:23:55,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136844486] [2023-04-01 00:23:55,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136844486] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:23:55,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:23:55,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 00:23:55,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593538311] [2023-04-01 00:23:55,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:23:55,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 00:23:55,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:23:55,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 00:23:55,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 00:23:55,845 INFO L87 Difference]: Start difference. First operand 9889 states and 14106 transitions. Second operand has 5 states, 5 states have (on average 14.6) internal successors, (73), 4 states have internal predecessors, (73), 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 00:23:57,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:23:57,533 INFO L93 Difference]: Finished difference Result 19719 states and 28141 transitions. [2023-04-01 00:23:57,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 00:23:57,533 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 4 states have internal predecessors, (73), 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) Word has length 78 [2023-04-01 00:23:57,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:23:57,554 INFO L225 Difference]: With dead ends: 19719 [2023-04-01 00:23:57,554 INFO L226 Difference]: Without dead ends: 9889 [2023-04-01 00:23:57,570 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-01 00:23:57,570 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 269 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 00:23:57,571 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [269 Valid, 106 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 00:23:57,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9889 states. [2023-04-01 00:23:59,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9889 to 9889. [2023-04-01 00:23:59,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9889 states, 9885 states have (on average 1.3969650986342943) internal successors, (13809), 9885 states have internal predecessors, (13809), 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 00:23:59,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9889 states to 9889 states and 13812 transitions. [2023-04-01 00:23:59,185 INFO L78 Accepts]: Start accepts. Automaton has 9889 states and 13812 transitions. Word has length 78 [2023-04-01 00:23:59,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:23:59,185 INFO L495 AbstractCegarLoop]: Abstraction has 9889 states and 13812 transitions. [2023-04-01 00:23:59,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 4 states have internal predecessors, (73), 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 00:23:59,186 INFO L276 IsEmpty]: Start isEmpty. Operand 9889 states and 13812 transitions. [2023-04-01 00:23:59,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-04-01 00:23:59,186 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:23:59,187 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:23:59,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-04-01 00:23:59,187 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:23:59,187 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:23:59,187 INFO L85 PathProgramCache]: Analyzing trace with hash -1385675092, now seen corresponding path program 1 times [2023-04-01 00:23:59,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:23:59,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548796111] [2023-04-01 00:23:59,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:23:59,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:23:59,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:23:59,818 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 00:23:59,818 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:23:59,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548796111] [2023-04-01 00:23:59,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548796111] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 00:23:59,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773527332] [2023-04-01 00:23:59,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:23:59,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 00:23:59,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 00:23:59,821 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 00:23:59,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 00:24:00,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:24:00,008 INFO L262 TraceCheckSpWp]: Trace formula consists of 806 conjuncts, 42 conjunts are in the unsatisfiable core [2023-04-01 00:24:00,012 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 00:24:01,067 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 00:24:01,067 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 00:24:04,836 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:24:04,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773527332] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 00:24:04,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2109986150] [2023-04-01 00:24:04,863 INFO L159 IcfgInterpreter]: Started Sifa with 72 locations of interest [2023-04-01 00:24:04,864 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 00:24:04,867 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 00:24:04,871 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 00:24:04,871 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 00:24:05,745 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 190 for LOIs [2023-04-01 00:24:08,219 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 12