/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_lcr-var-start-time.5.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 00:31:28,207 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 00:31:28,209 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 00:31:28,239 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-04-01 00:31:28,254 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 00:31:28,256 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 00:31:28,257 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 00:31:28,259 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 00:31:28,260 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 00:31:28,261 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 00:31:28,262 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 00:31:28,266 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 00:31:28,267 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 00:31:28,267 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 00:31:28,268 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 00:31:28,269 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 00:31:28,275 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-01 00:31:28,280 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 00:31:28,281 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 00:31:28,281 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 00:31:28,282 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 00:31:28,302 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 00:31:28,302 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 00:31:28,303 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 00:31:28,303 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 00:31:28,304 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 00:31:28,304 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 00:31:28,304 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 00:31:28,304 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 00:31:28,304 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 00:31:28,304 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 00:31:28,305 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 00:31:28,305 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 00:31:28,305 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 00:31:28,305 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 00:31:28,305 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 00:31:28,305 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 00:31:28,305 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 00:31:28,305 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 00:31:28,306 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 00:31:28,306 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 00:31:28,306 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 00:31:28,306 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 00:31:28,306 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 00:31:28,306 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 00:31:28,306 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 00:31:28,306 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 00:31:28,306 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 00:31:28,306 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 00:31:28,306 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 00:31:28,307 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 00:31:28,307 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 00:31:28,307 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 00:31:28,307 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 00:31:28,307 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 00:31:28,307 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 00:31:28,307 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 00:31:28,307 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 00:31:28,307 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 00:31:28,307 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 00:31:28,308 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 00:31:28,308 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 00:31:28,308 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-04-01 00:31:28,458 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 00:31:28,473 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 00:31:28,475 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 00:31:28,476 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 00:31:28,476 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 00:31:28,477 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2023-04-01 00:31:29,563 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 00:31:29,736 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 00:31:29,736 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2023-04-01 00:31:29,744 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/38953a237/c4d7f2febd9d435fbfffe18fd3953118/FLAGb6d0a5553 [2023-04-01 00:31:29,758 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/38953a237/c4d7f2febd9d435fbfffe18fd3953118 [2023-04-01 00:31:29,760 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 00:31:29,761 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 00:31:29,766 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 00:31:29,766 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 00:31:29,768 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 00:31:29,769 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:31:29" (1/1) ... [2023-04-01 00:31:29,770 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5bc25183 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:31:29, skipping insertion in model container [2023-04-01 00:31:29,770 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:31:29" (1/1) ... [2023-04-01 00:31:29,777 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 00:31:29,820 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 00:31:29,964 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_lcr-var-start-time.5.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c[8607,8620] [2023-04-01 00:31:30,032 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 00:31:30,044 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 00:31:30,085 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_lcr-var-start-time.5.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c[8607,8620] [2023-04-01 00:31:30,120 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 00:31:30,139 INFO L208 MainTranslator]: Completed translation [2023-04-01 00:31:30,140 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:31:30 WrapperNode [2023-04-01 00:31:30,140 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 00:31:30,140 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 00:31:30,140 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 00:31:30,141 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 00:31:30,153 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:31:30" (1/1) ... [2023-04-01 00:31:30,154 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:31:30" (1/1) ... [2023-04-01 00:31:30,163 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:31:30" (1/1) ... [2023-04-01 00:31:30,163 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:31:30" (1/1) ... [2023-04-01 00:31:30,175 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:31:30" (1/1) ... [2023-04-01 00:31:30,189 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:31:30" (1/1) ... [2023-04-01 00:31:30,192 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:31:30" (1/1) ... [2023-04-01 00:31:30,194 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:31:30" (1/1) ... [2023-04-01 00:31:30,198 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 00:31:30,199 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 00:31:30,199 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 00:31:30,199 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 00:31:30,201 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:31:30" (1/1) ... [2023-04-01 00:31:30,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 00:31:30,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 00:31:30,239 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 00:31:30,282 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 00:31:30,295 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 00:31:30,296 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 00:31:30,296 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 00:31:30,296 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 00:31:30,296 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 00:31:30,296 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 00:31:30,296 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 00:31:30,296 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 00:31:30,296 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 00:31:30,296 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-01 00:31:30,297 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-01 00:31:30,297 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-01 00:31:30,297 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 00:31:30,297 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-01 00:31:30,298 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-01 00:31:30,298 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-01 00:31:30,298 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-01 00:31:30,298 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-01 00:31:30,298 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2023-04-01 00:31:30,298 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2023-04-01 00:31:30,298 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-01 00:31:30,298 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-01 00:31:30,298 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 00:31:30,298 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 00:31:30,299 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 00:31:30,299 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 00:31:30,299 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 00:31:30,299 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 00:31:30,299 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 00:31:30,412 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 00:31:30,413 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 00:31:31,084 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 00:31:31,231 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 00:31:31,231 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-01 00:31:31,233 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:31:31 BoogieIcfgContainer [2023-04-01 00:31:31,233 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 00:31:31,236 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 00:31:31,236 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 00:31:31,238 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 00:31:31,238 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 12:31:29" (1/3) ... [2023-04-01 00:31:31,239 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70e03dd5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:31:31, skipping insertion in model container [2023-04-01 00:31:31,239 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:31:30" (2/3) ... [2023-04-01 00:31:31,239 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70e03dd5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:31:31, skipping insertion in model container [2023-04-01 00:31:31,239 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:31:31" (3/3) ... [2023-04-01 00:31:31,240 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.5.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2023-04-01 00:31:31,253 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 00:31:31,253 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 00:31:31,303 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 00:31:31,308 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;@319c2341, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 00:31:31,308 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 00:31:31,311 INFO L276 IsEmpty]: Start isEmpty. Operand has 171 states, 165 states have (on average 1.696969696969697) internal successors, (280), 166 states have internal predecessors, (280), 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 00:31:31,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-04-01 00:31:31,319 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:31:31,319 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 00:31:31,320 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:31:31,323 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:31:31,323 INFO L85 PathProgramCache]: Analyzing trace with hash 1934800137, now seen corresponding path program 1 times [2023-04-01 00:31:31,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:31:31,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569859655] [2023-04-01 00:31:31,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:31:31,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:31:31,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:31:31,863 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 00:31:31,864 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:31:31,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569859655] [2023-04-01 00:31:31,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569859655] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:31:31,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:31:31,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-01 00:31:31,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168192531] [2023-04-01 00:31:31,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:31:31,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 00:31:31,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:31:31,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 00:31:31,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-04-01 00:31:31,904 INFO L87 Difference]: Start difference. First operand has 171 states, 165 states have (on average 1.696969696969697) internal successors, (280), 166 states have internal predecessors, (280), 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 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 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 00:31:32,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:31:32,251 INFO L93 Difference]: Finished difference Result 595 states and 942 transitions. [2023-04-01 00:31:32,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 00:31:32,254 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 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 00:31:32,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:31:32,268 INFO L225 Difference]: With dead ends: 595 [2023-04-01 00:31:32,269 INFO L226 Difference]: Without dead ends: 484 [2023-04-01 00:31:32,272 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-04-01 00:31:32,277 INFO L413 NwaCegarLoop]: 459 mSDtfsCounter, 991 mSDsluCounter, 620 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 991 SdHoareTripleChecker+Valid, 1079 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 00:31:32,278 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [991 Valid, 1079 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 00:31:32,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2023-04-01 00:31:32,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 476. [2023-04-01 00:31:32,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 472 states have (on average 1.4046610169491525) internal successors, (663), 472 states have internal predecessors, (663), 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 00:31:32,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 666 transitions. [2023-04-01 00:31:32,383 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 666 transitions. Word has length 72 [2023-04-01 00:31:32,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:31:32,384 INFO L495 AbstractCegarLoop]: Abstraction has 476 states and 666 transitions. [2023-04-01 00:31:32,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 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 00:31:32,384 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 666 transitions. [2023-04-01 00:31:32,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-04-01 00:31:32,391 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:31:32,392 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 00:31:32,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 00:31:32,392 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:31:32,393 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:31:32,393 INFO L85 PathProgramCache]: Analyzing trace with hash -1126306455, now seen corresponding path program 1 times [2023-04-01 00:31:32,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:31:32,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847523534] [2023-04-01 00:31:32,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:31:32,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:31:32,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:31:32,576 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 00:31:32,577 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:31:32,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847523534] [2023-04-01 00:31:32,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847523534] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:31:32,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:31:32,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 00:31:32,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766853187] [2023-04-01 00:31:32,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:31:32,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 00:31:32,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:31:32,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 00:31:32,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 00:31:32,579 INFO L87 Difference]: Start difference. First operand 476 states and 666 transitions. Second operand has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 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 00:31:32,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:31:32,878 INFO L93 Difference]: Finished difference Result 1136 states and 1630 transitions. [2023-04-01 00:31:32,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 00:31:32,881 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 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 73 [2023-04-01 00:31:32,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:31:32,887 INFO L225 Difference]: With dead ends: 1136 [2023-04-01 00:31:32,887 INFO L226 Difference]: Without dead ends: 706 [2023-04-01 00:31:32,893 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 00:31:32,895 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 597 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 597 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 00:31:32,896 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [597 Valid, 231 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 00:31:32,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 706 states. [2023-04-01 00:31:32,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 706 to 704. [2023-04-01 00:31:32,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 704 states, 700 states have (on average 1.4285714285714286) internal successors, (1000), 700 states have internal predecessors, (1000), 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 00:31:32,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 704 states to 704 states and 1003 transitions. [2023-04-01 00:31:32,973 INFO L78 Accepts]: Start accepts. Automaton has 704 states and 1003 transitions. Word has length 73 [2023-04-01 00:31:32,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:31:32,974 INFO L495 AbstractCegarLoop]: Abstraction has 704 states and 1003 transitions. [2023-04-01 00:31:32,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 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 00:31:32,974 INFO L276 IsEmpty]: Start isEmpty. Operand 704 states and 1003 transitions. [2023-04-01 00:31:32,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-04-01 00:31:32,975 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:31:32,975 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 00:31:32,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 00:31:32,976 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:31:32,977 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:31:32,977 INFO L85 PathProgramCache]: Analyzing trace with hash 1463329878, now seen corresponding path program 1 times [2023-04-01 00:31:32,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:31:32,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594927281] [2023-04-01 00:31:32,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:31:32,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:31:33,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:31:33,125 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 00:31:33,125 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:31:33,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594927281] [2023-04-01 00:31:33,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594927281] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:31:33,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:31:33,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 00:31:33,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302830055] [2023-04-01 00:31:33,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:31:33,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 00:31:33,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:31:33,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 00:31:33,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 00:31:33,128 INFO L87 Difference]: Start difference. First operand 704 states and 1003 transitions. Second operand has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 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 00:31:33,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:31:33,486 INFO L93 Difference]: Finished difference Result 1798 states and 2618 transitions. [2023-04-01 00:31:33,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 00:31:33,487 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 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 73 [2023-04-01 00:31:33,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:31:33,492 INFO L225 Difference]: With dead ends: 1798 [2023-04-01 00:31:33,492 INFO L226 Difference]: Without dead ends: 1209 [2023-04-01 00:31:33,495 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 00:31:33,498 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 558 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 558 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 00:31:33,500 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [558 Valid, 255 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 00:31:33,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1209 states. [2023-04-01 00:31:33,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1209 to 1207. [2023-04-01 00:31:33,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1207 states, 1203 states have (on average 1.4480465502909394) internal successors, (1742), 1203 states have internal predecessors, (1742), 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 00:31:33,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1207 states to 1207 states and 1745 transitions. [2023-04-01 00:31:33,631 INFO L78 Accepts]: Start accepts. Automaton has 1207 states and 1745 transitions. Word has length 73 [2023-04-01 00:31:33,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:31:33,632 INFO L495 AbstractCegarLoop]: Abstraction has 1207 states and 1745 transitions. [2023-04-01 00:31:33,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 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 00:31:33,632 INFO L276 IsEmpty]: Start isEmpty. Operand 1207 states and 1745 transitions. [2023-04-01 00:31:33,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-04-01 00:31:33,634 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:31:33,634 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 00:31:33,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 00:31:33,634 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:31:33,636 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:31:33,636 INFO L85 PathProgramCache]: Analyzing trace with hash -272179547, now seen corresponding path program 1 times [2023-04-01 00:31:33,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:31:33,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979357782] [2023-04-01 00:31:33,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:31:33,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:31:33,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:31:33,766 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 00:31:33,767 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:31:33,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979357782] [2023-04-01 00:31:33,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979357782] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:31:33,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:31:33,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 00:31:33,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601416367] [2023-04-01 00:31:33,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:31:33,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 00:31:33,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:31:33,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 00:31:33,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 00:31:33,769 INFO L87 Difference]: Start difference. First operand 1207 states and 1745 transitions. Second operand has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 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 00:31:34,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:31:34,163 INFO L93 Difference]: Finished difference Result 3273 states and 4807 transitions. [2023-04-01 00:31:34,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 00:31:34,164 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 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 73 [2023-04-01 00:31:34,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:31:34,172 INFO L225 Difference]: With dead ends: 3273 [2023-04-01 00:31:34,172 INFO L226 Difference]: Without dead ends: 2215 [2023-04-01 00:31:34,175 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 00:31:34,179 INFO L413 NwaCegarLoop]: 163 mSDtfsCounter, 576 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 576 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 00:31:34,180 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [576 Valid, 256 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 00:31:34,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2215 states. [2023-04-01 00:31:34,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2215 to 2213. [2023-04-01 00:31:34,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2213 states, 2209 states have (on average 1.4594839293798099) internal successors, (3224), 2209 states have internal predecessors, (3224), 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 00:31:34,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2213 states to 2213 states and 3227 transitions. [2023-04-01 00:31:34,416 INFO L78 Accepts]: Start accepts. Automaton has 2213 states and 3227 transitions. Word has length 73 [2023-04-01 00:31:34,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:31:34,417 INFO L495 AbstractCegarLoop]: Abstraction has 2213 states and 3227 transitions. [2023-04-01 00:31:34,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 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 00:31:34,417 INFO L276 IsEmpty]: Start isEmpty. Operand 2213 states and 3227 transitions. [2023-04-01 00:31:34,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-04-01 00:31:34,418 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:31:34,418 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 00:31:34,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 00:31:34,418 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:31:34,418 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:31:34,418 INFO L85 PathProgramCache]: Analyzing trace with hash 1746746887, now seen corresponding path program 1 times [2023-04-01 00:31:34,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:31:34,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617871604] [2023-04-01 00:31:34,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:31:34,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:31:34,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:31:34,553 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 00:31:34,554 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:31:34,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617871604] [2023-04-01 00:31:34,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617871604] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:31:34,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:31:34,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 00:31:34,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808709221] [2023-04-01 00:31:34,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:31:34,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 00:31:34,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:31:34,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 00:31:34,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 00:31:34,558 INFO L87 Difference]: Start difference. First operand 2213 states and 3227 transitions. Second operand has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 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 00:31:35,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:31:35,195 INFO L93 Difference]: Finished difference Result 6355 states and 9343 transitions. [2023-04-01 00:31:35,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 00:31:35,195 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 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 73 [2023-04-01 00:31:35,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:31:35,211 INFO L225 Difference]: With dead ends: 6355 [2023-04-01 00:31:35,211 INFO L226 Difference]: Without dead ends: 4227 [2023-04-01 00:31:35,216 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 00:31:35,216 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 557 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 557 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 00:31:35,216 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [557 Valid, 247 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 00:31:35,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4227 states. [2023-04-01 00:31:35,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4227 to 4225. [2023-04-01 00:31:35,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4225 states, 4221 states have (on average 1.4593698175787728) internal successors, (6160), 4221 states have internal predecessors, (6160), 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 00:31:35,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4225 states to 4225 states and 6163 transitions. [2023-04-01 00:31:35,666 INFO L78 Accepts]: Start accepts. Automaton has 4225 states and 6163 transitions. Word has length 73 [2023-04-01 00:31:35,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:31:35,666 INFO L495 AbstractCegarLoop]: Abstraction has 4225 states and 6163 transitions. [2023-04-01 00:31:35,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 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 00:31:35,666 INFO L276 IsEmpty]: Start isEmpty. Operand 4225 states and 6163 transitions. [2023-04-01 00:31:35,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-04-01 00:31:35,667 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:31:35,667 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 00:31:35,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 00:31:35,667 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:31:35,668 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:31:35,668 INFO L85 PathProgramCache]: Analyzing trace with hash -1102287944, now seen corresponding path program 1 times [2023-04-01 00:31:35,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:31:35,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278346621] [2023-04-01 00:31:35,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:31:35,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:31:35,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:31:35,772 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 00:31:35,772 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:31:35,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278346621] [2023-04-01 00:31:35,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278346621] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:31:35,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:31:35,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 00:31:35,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776158278] [2023-04-01 00:31:35,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:31:35,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 00:31:35,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:31:35,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 00:31:35,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 00:31:35,774 INFO L87 Difference]: Start difference. First operand 4225 states and 6163 transitions. Second operand has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 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 00:31:36,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:31:36,772 INFO L93 Difference]: Finished difference Result 12414 states and 18188 transitions. [2023-04-01 00:31:36,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 00:31:36,773 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 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 73 [2023-04-01 00:31:36,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:31:36,800 INFO L225 Difference]: With dead ends: 12414 [2023-04-01 00:31:36,801 INFO L226 Difference]: Without dead ends: 8251 [2023-04-01 00:31:36,809 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 00:31:36,809 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 562 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 562 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 00:31:36,809 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [562 Valid, 239 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 00:31:36,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8251 states. [2023-04-01 00:31:37,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8251 to 8249. [2023-04-01 00:31:37,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8249 states, 8245 states have (on average 1.4516676773802304) internal successors, (11969), 8245 states have internal predecessors, (11969), 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 00:31:37,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8249 states to 8249 states and 11972 transitions. [2023-04-01 00:31:37,559 INFO L78 Accepts]: Start accepts. Automaton has 8249 states and 11972 transitions. Word has length 73 [2023-04-01 00:31:37,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:31:37,559 INFO L495 AbstractCegarLoop]: Abstraction has 8249 states and 11972 transitions. [2023-04-01 00:31:37,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 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 00:31:37,560 INFO L276 IsEmpty]: Start isEmpty. Operand 8249 states and 11972 transitions. [2023-04-01 00:31:37,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-04-01 00:31:37,561 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:31:37,561 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 00:31:37,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-01 00:31:37,561 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:31:37,561 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:31:37,561 INFO L85 PathProgramCache]: Analyzing trace with hash -1661703426, now seen corresponding path program 1 times [2023-04-01 00:31:37,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:31:37,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082281447] [2023-04-01 00:31:37,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:31:37,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:31:37,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:31:38,860 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 00:31:38,860 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:31:38,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082281447] [2023-04-01 00:31:38,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082281447] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:31:38,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:31:38,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2023-04-01 00:31:38,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112391956] [2023-04-01 00:31:38,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:31:38,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-04-01 00:31:38,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:31:38,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-04-01 00:31:38,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2023-04-01 00:31:38,862 INFO L87 Difference]: Start difference. First operand 8249 states and 11972 transitions. Second operand has 20 states, 20 states have (on average 3.55) internal successors, (71), 20 states have internal predecessors, (71), 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 00:31:42,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:31:42,137 INFO L93 Difference]: Finished difference Result 21190 states and 30733 transitions. [2023-04-01 00:31:42,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-04-01 00:31:42,138 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.55) internal successors, (71), 20 states have internal predecessors, (71), 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 74 [2023-04-01 00:31:42,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:31:42,200 INFO L225 Difference]: With dead ends: 21190 [2023-04-01 00:31:42,200 INFO L226 Difference]: Without dead ends: 21188 [2023-04-01 00:31:42,208 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=377, Invalid=1029, Unknown=0, NotChecked=0, Total=1406 [2023-04-01 00:31:42,209 INFO L413 NwaCegarLoop]: 257 mSDtfsCounter, 1344 mSDsluCounter, 895 mSDsCounter, 0 mSdLazyCounter, 525 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1344 SdHoareTripleChecker+Valid, 1152 SdHoareTripleChecker+Invalid, 566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 00:31:42,209 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1344 Valid, 1152 Invalid, 566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 525 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 00:31:42,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21188 states. [2023-04-01 00:31:44,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21188 to 16312. [2023-04-01 00:31:44,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16312 states, 16308 states have (on average 1.446345351974491) internal successors, (23587), 16308 states have internal predecessors, (23587), 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 00:31:44,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16312 states to 16312 states and 23590 transitions. [2023-04-01 00:31:44,169 INFO L78 Accepts]: Start accepts. Automaton has 16312 states and 23590 transitions. Word has length 74 [2023-04-01 00:31:44,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:31:44,170 INFO L495 AbstractCegarLoop]: Abstraction has 16312 states and 23590 transitions. [2023-04-01 00:31:44,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.55) internal successors, (71), 20 states have internal predecessors, (71), 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 00:31:44,170 INFO L276 IsEmpty]: Start isEmpty. Operand 16312 states and 23590 transitions. [2023-04-01 00:31:44,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-04-01 00:31:44,171 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:31:44,171 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 00:31:44,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-01 00:31:44,171 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:31:44,171 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:31:44,171 INFO L85 PathProgramCache]: Analyzing trace with hash -1456812002, now seen corresponding path program 1 times [2023-04-01 00:31:44,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:31:44,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091119827] [2023-04-01 00:31:44,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:31:44,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:31:44,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:31:45,246 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 00:31:45,246 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:31:45,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091119827] [2023-04-01 00:31:45,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091119827] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:31:45,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:31:45,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2023-04-01 00:31:45,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982606291] [2023-04-01 00:31:45,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:31:45,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-04-01 00:31:45,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:31:45,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-04-01 00:31:45,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2023-04-01 00:31:45,248 INFO L87 Difference]: Start difference. First operand 16312 states and 23590 transitions. Second operand has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 18 states have internal predecessors, (71), 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 00:31:48,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:31:48,216 INFO L93 Difference]: Finished difference Result 21720 states and 31332 transitions. [2023-04-01 00:31:48,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-04-01 00:31:48,217 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 18 states have internal predecessors, (71), 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 74 [2023-04-01 00:31:48,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:31:48,264 INFO L225 Difference]: With dead ends: 21720 [2023-04-01 00:31:48,265 INFO L226 Difference]: Without dead ends: 19670 [2023-04-01 00:31:48,278 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=188, Invalid=568, Unknown=0, NotChecked=0, Total=756 [2023-04-01 00:31:48,278 INFO L413 NwaCegarLoop]: 350 mSDtfsCounter, 1034 mSDsluCounter, 1437 mSDsCounter, 0 mSdLazyCounter, 759 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1034 SdHoareTripleChecker+Valid, 1787 SdHoareTripleChecker+Invalid, 793 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 759 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 00:31:48,278 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1034 Valid, 1787 Invalid, 793 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 759 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 00:31:48,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19670 states. [2023-04-01 00:31:50,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19670 to 18195. [2023-04-01 00:31:50,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18195 states, 18191 states have (on average 1.444065746797867) internal successors, (26269), 18191 states have internal predecessors, (26269), 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 00:31:50,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18195 states to 18195 states and 26272 transitions. [2023-04-01 00:31:50,281 INFO L78 Accepts]: Start accepts. Automaton has 18195 states and 26272 transitions. Word has length 74 [2023-04-01 00:31:50,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:31:50,281 INFO L495 AbstractCegarLoop]: Abstraction has 18195 states and 26272 transitions. [2023-04-01 00:31:50,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 18 states have internal predecessors, (71), 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 00:31:50,281 INFO L276 IsEmpty]: Start isEmpty. Operand 18195 states and 26272 transitions. [2023-04-01 00:31:50,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-04-01 00:31:50,282 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:31:50,282 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 00:31:50,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-01 00:31:50,282 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:31:50,283 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:31:50,283 INFO L85 PathProgramCache]: Analyzing trace with hash -1371071362, now seen corresponding path program 1 times [2023-04-01 00:31:50,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:31:50,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723570129] [2023-04-01 00:31:50,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:31:50,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:31:50,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:31:51,352 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 00:31:51,353 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:31:51,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723570129] [2023-04-01 00:31:51,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723570129] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:31:51,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:31:51,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2023-04-01 00:31:51,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229394479] [2023-04-01 00:31:51,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:31:51,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-04-01 00:31:51,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:31:51,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-04-01 00:31:51,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2023-04-01 00:31:51,354 INFO L87 Difference]: Start difference. First operand 18195 states and 26272 transitions. Second operand has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 18 states have internal predecessors, (71), 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 00:31:54,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:31:54,392 INFO L93 Difference]: Finished difference Result 21521 states and 30975 transitions. [2023-04-01 00:31:54,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-04-01 00:31:54,392 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 18 states have internal predecessors, (71), 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 74 [2023-04-01 00:31:54,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:31:54,444 INFO L225 Difference]: With dead ends: 21521 [2023-04-01 00:31:54,444 INFO L226 Difference]: Without dead ends: 21519 [2023-04-01 00:31:54,454 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=228, Invalid=642, Unknown=0, NotChecked=0, Total=870 [2023-04-01 00:31:54,455 INFO L413 NwaCegarLoop]: 337 mSDtfsCounter, 1125 mSDsluCounter, 1242 mSDsCounter, 0 mSdLazyCounter, 874 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1125 SdHoareTripleChecker+Valid, 1579 SdHoareTripleChecker+Invalid, 905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 874 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-01 00:31:54,455 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1125 Valid, 1579 Invalid, 905 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 874 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-01 00:31:54,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21519 states. [2023-04-01 00:31:56,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21519 to 18213. [2023-04-01 00:31:56,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18213 states, 18209 states have (on average 1.4437366137624252) internal successors, (26289), 18209 states have internal predecessors, (26289), 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 00:31:56,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18213 states to 18213 states and 26292 transitions. [2023-04-01 00:31:56,548 INFO L78 Accepts]: Start accepts. Automaton has 18213 states and 26292 transitions. Word has length 74 [2023-04-01 00:31:56,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:31:56,549 INFO L495 AbstractCegarLoop]: Abstraction has 18213 states and 26292 transitions. [2023-04-01 00:31:56,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 18 states have internal predecessors, (71), 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 00:31:56,549 INFO L276 IsEmpty]: Start isEmpty. Operand 18213 states and 26292 transitions. [2023-04-01 00:31:56,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-04-01 00:31:56,550 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:31:56,550 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 00:31:56,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-01 00:31:56,550 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:31:56,551 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:31:56,551 INFO L85 PathProgramCache]: Analyzing trace with hash 1638810558, now seen corresponding path program 1 times [2023-04-01 00:31:56,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:31:56,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030768141] [2023-04-01 00:31:56,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:31:56,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:31:56,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:31:57,507 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 00:31:57,507 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:31:57,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030768141] [2023-04-01 00:31:57,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030768141] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:31:57,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:31:57,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2023-04-01 00:31:57,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039122629] [2023-04-01 00:31:57,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:31:57,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-04-01 00:31:57,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:31:57,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-04-01 00:31:57,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2023-04-01 00:31:57,509 INFO L87 Difference]: Start difference. First operand 18213 states and 26292 transitions. Second operand has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 18 states have internal predecessors, (71), 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 00:32:00,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:32:00,912 INFO L93 Difference]: Finished difference Result 25856 states and 37301 transitions. [2023-04-01 00:32:00,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-04-01 00:32:00,913 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 18 states have internal predecessors, (71), 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 74 [2023-04-01 00:32:00,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:32:00,965 INFO L225 Difference]: With dead ends: 25856 [2023-04-01 00:32:00,965 INFO L226 Difference]: Without dead ends: 25854 [2023-04-01 00:32:00,974 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=242, Invalid=688, Unknown=0, NotChecked=0, Total=930 [2023-04-01 00:32:00,975 INFO L413 NwaCegarLoop]: 359 mSDtfsCounter, 1110 mSDsluCounter, 1623 mSDsCounter, 0 mSdLazyCounter, 628 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1110 SdHoareTripleChecker+Valid, 1982 SdHoareTripleChecker+Invalid, 659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 628 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 00:32:00,975 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1110 Valid, 1982 Invalid, 659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 628 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 00:32:00,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25854 states. [2023-04-01 00:32:03,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25854 to 18235. [2023-04-01 00:32:03,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18235 states, 18231 states have (on average 1.4434753990455818) internal successors, (26316), 18231 states have internal predecessors, (26316), 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 00:32:03,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18235 states to 18235 states and 26319 transitions. [2023-04-01 00:32:03,110 INFO L78 Accepts]: Start accepts. Automaton has 18235 states and 26319 transitions. Word has length 74 [2023-04-01 00:32:03,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:32:03,111 INFO L495 AbstractCegarLoop]: Abstraction has 18235 states and 26319 transitions. [2023-04-01 00:32:03,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 18 states have internal predecessors, (71), 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 00:32:03,111 INFO L276 IsEmpty]: Start isEmpty. Operand 18235 states and 26319 transitions. [2023-04-01 00:32:03,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-04-01 00:32:03,112 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:32:03,112 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 00:32:03,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-01 00:32:03,112 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:32:03,112 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:32:03,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1373014178, now seen corresponding path program 1 times [2023-04-01 00:32:03,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:32:03,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12001179] [2023-04-01 00:32:03,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:32:03,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:32:03,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:32:04,022 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 00:32:04,023 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:32:04,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12001179] [2023-04-01 00:32:04,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12001179] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:32:04,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:32:04,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2023-04-01 00:32:04,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906218498] [2023-04-01 00:32:04,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:32:04,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-04-01 00:32:04,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:32:04,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-04-01 00:32:04,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2023-04-01 00:32:04,024 INFO L87 Difference]: Start difference. First operand 18235 states and 26319 transitions. Second operand has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 18 states have internal predecessors, (71), 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 00:32:08,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:32:08,008 INFO L93 Difference]: Finished difference Result 28592 states and 41289 transitions. [2023-04-01 00:32:08,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-04-01 00:32:08,009 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 18 states have internal predecessors, (71), 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 74 [2023-04-01 00:32:08,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:32:08,058 INFO L225 Difference]: With dead ends: 28592 [2023-04-01 00:32:08,059 INFO L226 Difference]: Without dead ends: 28590 [2023-04-01 00:32:08,070 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=246, Invalid=684, Unknown=0, NotChecked=0, Total=930 [2023-04-01 00:32:08,071 INFO L413 NwaCegarLoop]: 359 mSDtfsCounter, 1190 mSDsluCounter, 1989 mSDsCounter, 0 mSdLazyCounter, 960 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1190 SdHoareTripleChecker+Valid, 2348 SdHoareTripleChecker+Invalid, 993 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 960 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-01 00:32:08,071 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1190 Valid, 2348 Invalid, 993 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 960 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-01 00:32:08,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28590 states. [2023-04-01 00:32:10,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28590 to 18261. [2023-04-01 00:32:10,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18261 states, 18257 states have (on average 1.4432272552993373) internal successors, (26349), 18257 states have internal predecessors, (26349), 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 00:32:10,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18261 states to 18261 states and 26352 transitions. [2023-04-01 00:32:10,269 INFO L78 Accepts]: Start accepts. Automaton has 18261 states and 26352 transitions. Word has length 74 [2023-04-01 00:32:10,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:32:10,270 INFO L495 AbstractCegarLoop]: Abstraction has 18261 states and 26352 transitions. [2023-04-01 00:32:10,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 18 states have internal predecessors, (71), 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 00:32:10,270 INFO L276 IsEmpty]: Start isEmpty. Operand 18261 states and 26352 transitions. [2023-04-01 00:32:10,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-04-01 00:32:10,271 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:32:10,271 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, 1, 1, 1, 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 00:32:10,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-04-01 00:32:10,271 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:32:10,272 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:32:10,272 INFO L85 PathProgramCache]: Analyzing trace with hash -248062765, now seen corresponding path program 1 times [2023-04-01 00:32:10,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:32:10,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405716664] [2023-04-01 00:32:10,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:32:10,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:32:10,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:32:11,433 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 00:32:11,433 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:32:11,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405716664] [2023-04-01 00:32:11,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405716664] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:32:11,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:32:11,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2023-04-01 00:32:11,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151954550] [2023-04-01 00:32:11,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:32:11,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-04-01 00:32:11,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:32:11,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-04-01 00:32:11,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2023-04-01 00:32:11,435 INFO L87 Difference]: Start difference. First operand 18261 states and 26352 transitions. Second operand has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 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 00:32:15,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:32:15,435 INFO L93 Difference]: Finished difference Result 23725 states and 34161 transitions. [2023-04-01 00:32:15,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-04-01 00:32:15,436 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 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 76 [2023-04-01 00:32:15,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:32:15,473 INFO L225 Difference]: With dead ends: 23725 [2023-04-01 00:32:15,473 INFO L226 Difference]: Without dead ends: 21675 [2023-04-01 00:32:15,484 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=389, Invalid=1333, Unknown=0, NotChecked=0, Total=1722 [2023-04-01 00:32:15,485 INFO L413 NwaCegarLoop]: 221 mSDtfsCounter, 1507 mSDsluCounter, 1746 mSDsCounter, 0 mSdLazyCounter, 2311 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1507 SdHoareTripleChecker+Valid, 1967 SdHoareTripleChecker+Invalid, 2345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 2311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-04-01 00:32:15,485 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1507 Valid, 1967 Invalid, 2345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 2311 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-04-01 00:32:15,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21675 states. [2023-04-01 00:32:17,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21675 to 18267. [2023-04-01 00:32:17,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18267 states, 18263 states have (on average 1.4431911515085145) internal successors, (26357), 18263 states have internal predecessors, (26357), 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 00:32:17,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18267 states to 18267 states and 26360 transitions. [2023-04-01 00:32:17,703 INFO L78 Accepts]: Start accepts. Automaton has 18267 states and 26360 transitions. Word has length 76 [2023-04-01 00:32:17,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:32:17,704 INFO L495 AbstractCegarLoop]: Abstraction has 18267 states and 26360 transitions. [2023-04-01 00:32:17,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 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 00:32:17,704 INFO L276 IsEmpty]: Start isEmpty. Operand 18267 states and 26360 transitions. [2023-04-01 00:32:17,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-04-01 00:32:17,705 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:32:17,705 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 00:32:17,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-04-01 00:32:17,705 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:32:17,706 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:32:17,706 INFO L85 PathProgramCache]: Analyzing trace with hash -162322125, now seen corresponding path program 1 times [2023-04-01 00:32:17,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:32:17,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167759918] [2023-04-01 00:32:17,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:32:17,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:32:17,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:32:18,824 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 00:32:18,824 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:32:18,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167759918] [2023-04-01 00:32:18,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167759918] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:32:18,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:32:18,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2023-04-01 00:32:18,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545230823] [2023-04-01 00:32:18,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:32:18,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-04-01 00:32:18,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:32:18,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-04-01 00:32:18,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2023-04-01 00:32:18,826 INFO L87 Difference]: Start difference. First operand 18267 states and 26360 transitions. Second operand has 20 states, 20 states have (on average 3.65) internal successors, (73), 20 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 00:32:25,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:32:25,173 INFO L93 Difference]: Finished difference Result 39364 states and 56845 transitions. [2023-04-01 00:32:25,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-04-01 00:32:25,174 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.65) internal successors, (73), 20 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 76 [2023-04-01 00:32:25,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:32:25,239 INFO L225 Difference]: With dead ends: 39364 [2023-04-01 00:32:25,239 INFO L226 Difference]: Without dead ends: 39362 [2023-04-01 00:32:25,253 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=353, Invalid=979, Unknown=0, NotChecked=0, Total=1332 [2023-04-01 00:32:25,253 INFO L413 NwaCegarLoop]: 281 mSDtfsCounter, 1158 mSDsluCounter, 1823 mSDsCounter, 0 mSdLazyCounter, 1216 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1158 SdHoareTripleChecker+Valid, 2104 SdHoareTripleChecker+Invalid, 1247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-04-01 00:32:25,253 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1158 Valid, 2104 Invalid, 1247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1216 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-04-01 00:32:25,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39362 states. [2023-04-01 00:32:27,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39362 to 18275. [2023-04-01 00:32:27,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18275 states, 18271 states have (on average 1.4431612938536478) internal successors, (26368), 18271 states have internal predecessors, (26368), 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 00:32:27,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18275 states to 18275 states and 26371 transitions. [2023-04-01 00:32:27,917 INFO L78 Accepts]: Start accepts. Automaton has 18275 states and 26371 transitions. Word has length 76 [2023-04-01 00:32:27,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:32:27,918 INFO L495 AbstractCegarLoop]: Abstraction has 18275 states and 26371 transitions. [2023-04-01 00:32:27,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.65) internal successors, (73), 20 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 00:32:27,919 INFO L276 IsEmpty]: Start isEmpty. Operand 18275 states and 26371 transitions. [2023-04-01 00:32:27,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-04-01 00:32:27,924 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:32:27,924 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 00:32:27,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-04-01 00:32:27,925 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:32:27,925 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:32:27,925 INFO L85 PathProgramCache]: Analyzing trace with hash -1447407501, now seen corresponding path program 1 times [2023-04-01 00:32:27,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:32:27,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921374822] [2023-04-01 00:32:27,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:32:27,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:32:27,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat