/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-03 03:25:26,163 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-03 03:25:26,166 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-03 03:25:26,206 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-04-03 03:25:26,224 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-03 03:25:26,227 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-03 03:25:26,228 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-03 03:25:26,229 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-03 03:25:26,229 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-03 03:25:26,230 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-03 03:25:26,232 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-03 03:25:26,236 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-03 03:25:26,237 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-03 03:25:26,238 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-03 03:25:26,239 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-03 03:25:26,241 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-03 03:25:26,248 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-03 03:25:26,249 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-03 03:25:26,249 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-03 03:25:26,250 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-03 03:25:26,251 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-03 03:25:26,251 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2023-04-03 03:25:26,255 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-03 03:25:26,256 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-03 03:25:26,257 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-03 03:25:26,258 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 [2023-04-03 03:25:26,287 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-03 03:25:26,287 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-03 03:25:26,288 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-03 03:25:26,288 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-03 03:25:26,289 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-03 03:25:26,289 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-03 03:25:26,289 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-03 03:25:26,289 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-03 03:25:26,289 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-03 03:25:26,289 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-03 03:25:26,290 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-03 03:25:26,290 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-03 03:25:26,290 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-03 03:25:26,290 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-03 03:25:26,291 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-03 03:25:26,291 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-03 03:25:26,291 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-03 03:25:26,291 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-03 03:25:26,291 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-03 03:25:26,292 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-03 03:25:26,292 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-03 03:25:26,292 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-03 03:25:26,292 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-03 03:25:26,292 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-03 03:25:26,292 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-03 03:25:26,292 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-03 03:25:26,292 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-03 03:25:26,292 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-03 03:25:26,293 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-03 03:25:26,293 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-03 03:25:26,293 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-03 03:25:26,293 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-03 03:25:26,293 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 03:25:26,293 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-03 03:25:26,294 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-03 03:25:26,294 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-03 03:25:26,294 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-03 03:25:26,294 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-03 03:25:26,294 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-03 03:25:26,294 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-03 03:25:26,294 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-03 03:25:26,294 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-03 03:25:26,532 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-03 03:25:26,552 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-03 03:25:26,555 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-03 03:25:26,556 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-03 03:25:26,559 INFO L275 PluginConnector]: CDTParser initialized [2023-04-03 03:25:26,560 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-04-03 03:25:27,759 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-03 03:25:28,001 INFO L351 CDTParser]: Found 1 translation units. [2023-04-03 03:25:28,001 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-04-03 03:25:28,018 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cf13979ef/628ff54a66984ac091cb4d81528a14c4/FLAGa1de6ce1c [2023-04-03 03:25:28,033 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cf13979ef/628ff54a66984ac091cb4d81528a14c4 [2023-04-03 03:25:28,035 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-03 03:25:28,037 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-03 03:25:28,038 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-03 03:25:28,038 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-03 03:25:28,041 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-03 03:25:28,042 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 03:25:28" (1/1) ... [2023-04-03 03:25:28,043 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68274123 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 03:25:28, skipping insertion in model container [2023-04-03 03:25:28,043 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 03:25:28" (1/1) ... [2023-04-03 03:25:28,050 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-03 03:25:28,092 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-03 03:25:28,321 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_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[13490,13503] [2023-04-03 03:25:28,393 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 03:25:28,414 INFO L203 MainTranslator]: Completed pre-run [2023-04-03 03:25:28,497 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_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[13490,13503] [2023-04-03 03:25:28,533 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 03:25:28,554 INFO L208 MainTranslator]: Completed translation [2023-04-03 03:25:28,554 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 03:25:28 WrapperNode [2023-04-03 03:25:28,554 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-03 03:25:28,555 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-03 03:25:28,556 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-03 03:25:28,556 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-03 03:25:28,569 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 03:25:28" (1/1) ... [2023-04-03 03:25:28,570 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 03:25:28" (1/1) ... [2023-04-03 03:25:28,594 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 03:25:28" (1/1) ... [2023-04-03 03:25:28,595 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 03:25:28" (1/1) ... [2023-04-03 03:25:28,622 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 03:25:28" (1/1) ... [2023-04-03 03:25:28,637 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 03:25:28" (1/1) ... [2023-04-03 03:25:28,645 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 03:25:28" (1/1) ... [2023-04-03 03:25:28,650 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 03:25:28" (1/1) ... [2023-04-03 03:25:28,660 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-03 03:25:28,661 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-03 03:25:28,661 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-03 03:25:28,661 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-03 03:25:28,662 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 03:25:28" (1/1) ... [2023-04-03 03:25:28,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 03:25:28,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 03:25:28,706 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) [2023-04-03 03:25:28,715 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 [2023-04-03 03:25:28,743 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-03 03:25:28,743 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-03 03:25:28,743 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-03 03:25:28,743 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-03 03:25:28,744 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-03 03:25:28,744 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-03 03:25:28,744 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-03 03:25:28,744 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-03 03:25:28,744 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-03 03:25:28,744 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-03 03:25:28,744 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2023-04-03 03:25:28,745 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-03 03:25:28,745 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-03 03:25:28,745 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-03 03:25:28,745 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-03 03:25:28,745 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-03 03:25:28,745 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-03 03:25:28,745 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-03 03:25:28,745 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-03 03:25:28,745 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2023-04-03 03:25:28,746 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-03 03:25:28,746 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-03 03:25:28,746 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-03 03:25:28,746 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-03 03:25:28,746 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-03 03:25:28,746 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-03 03:25:28,746 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-03 03:25:28,746 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-03 03:25:28,746 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-03 03:25:28,937 INFO L236 CfgBuilder]: Building ICFG [2023-04-03 03:25:28,939 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-03 03:25:29,794 INFO L277 CfgBuilder]: Performing block encoding [2023-04-03 03:25:30,129 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-03 03:25:30,130 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-03 03:25:30,134 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 03:25:30 BoogieIcfgContainer [2023-04-03 03:25:30,134 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-03 03:25:30,137 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-03 03:25:30,137 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-03 03:25:30,140 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-03 03:25:30,140 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.04 03:25:28" (1/3) ... [2023-04-03 03:25:30,141 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31c5bcf6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 03:25:30, skipping insertion in model container [2023-04-03 03:25:30,141 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 03:25:28" (2/3) ... [2023-04-03 03:25:30,141 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31c5bcf6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 03:25:30, skipping insertion in model container [2023-04-03 03:25:30,141 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 03:25:30" (3/3) ... [2023-04-03 03:25:30,146 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-04-03 03:25:30,163 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-03 03:25:30,164 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-03 03:25:30,233 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-03 03:25:30,239 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;@40de806f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-03 03:25:30,239 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-03 03:25:30,246 INFO L276 IsEmpty]: Start isEmpty. Operand has 276 states, 263 states have (on average 1.673003802281369) internal successors, (440), 271 states have internal predecessors, (440), 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) [2023-04-03 03:25:30,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2023-04-03 03:25:30,258 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:25:30,258 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 03:25:30,259 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:25:30,263 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:25:30,263 INFO L85 PathProgramCache]: Analyzing trace with hash 1304659540, now seen corresponding path program 1 times [2023-04-03 03:25:30,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:25:30,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366402834] [2023-04-03 03:25:30,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:25:30,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:25:30,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:25:30,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 03:25:30,831 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:25:30,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366402834] [2023-04-03 03:25:30,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366402834] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:25:30,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:25:30,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 03:25:30,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400485488] [2023-04-03 03:25:30,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:25:30,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 03:25:30,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:25:30,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 03:25:30,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 03:25:30,868 INFO L87 Difference]: Start difference. First operand has 276 states, 263 states have (on average 1.673003802281369) internal successors, (440), 271 states have internal predecessors, (440), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 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) [2023-04-03 03:25:31,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:25:31,069 INFO L93 Difference]: Finished difference Result 488 states and 765 transitions. [2023-04-03 03:25:31,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 03:25:31,071 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 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 101 [2023-04-03 03:25:31,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:25:31,089 INFO L225 Difference]: With dead ends: 488 [2023-04-03 03:25:31,089 INFO L226 Difference]: Without dead ends: 350 [2023-04-03 03:25:31,093 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 03:25:31,098 INFO L413 NwaCegarLoop]: 548 mSDtfsCounter, 183 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 906 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 03:25:31,099 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [183 Valid, 906 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 03:25:31,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2023-04-03 03:25:31,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 348. [2023-04-03 03:25:31,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 344 states have (on average 1.5290697674418605) internal successors, (526), 344 states have internal predecessors, (526), 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) [2023-04-03 03:25:31,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 529 transitions. [2023-04-03 03:25:31,184 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 529 transitions. Word has length 101 [2023-04-03 03:25:31,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:25:31,185 INFO L495 AbstractCegarLoop]: Abstraction has 348 states and 529 transitions. [2023-04-03 03:25:31,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 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) [2023-04-03 03:25:31,185 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 529 transitions. [2023-04-03 03:25:31,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-04-03 03:25:31,194 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:25:31,194 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 03:25:31,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-03 03:25:31,196 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:25:31,197 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:25:31,197 INFO L85 PathProgramCache]: Analyzing trace with hash -587967180, now seen corresponding path program 1 times [2023-04-03 03:25:31,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:25:31,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846894503] [2023-04-03 03:25:31,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:25:31,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:25:31,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:25:31,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 03:25:31,433 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:25:31,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846894503] [2023-04-03 03:25:31,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846894503] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:25:31,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:25:31,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 03:25:31,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443957236] [2023-04-03 03:25:31,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:25:31,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 03:25:31,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:25:31,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 03:25:31,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 03:25:31,437 INFO L87 Difference]: Start difference. First operand 348 states and 529 transitions. Second operand has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 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) [2023-04-03 03:25:31,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:25:31,570 INFO L93 Difference]: Finished difference Result 642 states and 993 transitions. [2023-04-03 03:25:31,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 03:25:31,571 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 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 103 [2023-04-03 03:25:31,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:25:31,573 INFO L225 Difference]: With dead ends: 642 [2023-04-03 03:25:31,573 INFO L226 Difference]: Without dead ends: 454 [2023-04-03 03:25:31,575 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 03:25:31,576 INFO L413 NwaCegarLoop]: 364 mSDtfsCounter, 160 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 696 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 03:25:31,576 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 696 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 03:25:31,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2023-04-03 03:25:31,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 452. [2023-04-03 03:25:31,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 448 states have (on average 1.5357142857142858) internal successors, (688), 448 states have internal predecessors, (688), 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) [2023-04-03 03:25:31,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 691 transitions. [2023-04-03 03:25:31,601 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 691 transitions. Word has length 103 [2023-04-03 03:25:31,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:25:31,602 INFO L495 AbstractCegarLoop]: Abstraction has 452 states and 691 transitions. [2023-04-03 03:25:31,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 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) [2023-04-03 03:25:31,602 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 691 transitions. [2023-04-03 03:25:31,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2023-04-03 03:25:31,605 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:25:31,606 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 03:25:31,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-03 03:25:31,606 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:25:31,607 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:25:31,607 INFO L85 PathProgramCache]: Analyzing trace with hash 40230641, now seen corresponding path program 1 times [2023-04-03 03:25:31,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:25:31,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130791369] [2023-04-03 03:25:31,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:25:31,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:25:31,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:25:31,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 03:25:31,843 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:25:31,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130791369] [2023-04-03 03:25:31,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130791369] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:25:31,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:25:31,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 03:25:31,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185222280] [2023-04-03 03:25:31,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:25:31,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 03:25:31,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:25:31,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 03:25:31,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 03:25:31,848 INFO L87 Difference]: Start difference. First operand 452 states and 691 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 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) [2023-04-03 03:25:31,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:25:31,967 INFO L93 Difference]: Finished difference Result 972 states and 1506 transitions. [2023-04-03 03:25:31,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 03:25:31,968 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 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 106 [2023-04-03 03:25:31,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:25:31,971 INFO L225 Difference]: With dead ends: 972 [2023-04-03 03:25:31,971 INFO L226 Difference]: Without dead ends: 682 [2023-04-03 03:25:31,976 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 03:25:31,978 INFO L413 NwaCegarLoop]: 456 mSDtfsCounter, 158 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 780 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 03:25:31,980 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 780 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 03:25:31,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2023-04-03 03:25:32,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 680. [2023-04-03 03:25:32,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 680 states, 676 states have (on average 1.5414201183431953) internal successors, (1042), 676 states have internal predecessors, (1042), 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) [2023-04-03 03:25:32,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 680 states to 680 states and 1045 transitions. [2023-04-03 03:25:32,030 INFO L78 Accepts]: Start accepts. Automaton has 680 states and 1045 transitions. Word has length 106 [2023-04-03 03:25:32,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:25:32,032 INFO L495 AbstractCegarLoop]: Abstraction has 680 states and 1045 transitions. [2023-04-03 03:25:32,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 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) [2023-04-03 03:25:32,032 INFO L276 IsEmpty]: Start isEmpty. Operand 680 states and 1045 transitions. [2023-04-03 03:25:32,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-04-03 03:25:32,039 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:25:32,040 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 03:25:32,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-03 03:25:32,040 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:25:32,041 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:25:32,042 INFO L85 PathProgramCache]: Analyzing trace with hash -1097941156, now seen corresponding path program 1 times [2023-04-03 03:25:32,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:25:32,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576686668] [2023-04-03 03:25:32,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:25:32,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:25:32,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:25:32,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 03:25:32,228 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:25:32,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576686668] [2023-04-03 03:25:32,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576686668] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:25:32,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:25:32,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 03:25:32,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086700924] [2023-04-03 03:25:32,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:25:32,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 03:25:32,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:25:32,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 03:25:32,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 03:25:32,231 INFO L87 Difference]: Start difference. First operand 680 states and 1045 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 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) [2023-04-03 03:25:32,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:25:32,391 INFO L93 Difference]: Finished difference Result 1510 states and 2347 transitions. [2023-04-03 03:25:32,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 03:25:32,392 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 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 108 [2023-04-03 03:25:32,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:25:32,396 INFO L225 Difference]: With dead ends: 1510 [2023-04-03 03:25:32,396 INFO L226 Difference]: Without dead ends: 992 [2023-04-03 03:25:32,397 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 03:25:32,398 INFO L413 NwaCegarLoop]: 373 mSDtfsCounter, 157 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 713 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 03:25:32,398 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 713 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 03:25:32,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 992 states. [2023-04-03 03:25:32,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 992 to 990. [2023-04-03 03:25:32,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 990 states, 986 states have (on average 1.550709939148073) internal successors, (1529), 986 states have internal predecessors, (1529), 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) [2023-04-03 03:25:32,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 990 states to 990 states and 1532 transitions. [2023-04-03 03:25:32,470 INFO L78 Accepts]: Start accepts. Automaton has 990 states and 1532 transitions. Word has length 108 [2023-04-03 03:25:32,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:25:32,471 INFO L495 AbstractCegarLoop]: Abstraction has 990 states and 1532 transitions. [2023-04-03 03:25:32,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 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) [2023-04-03 03:25:32,471 INFO L276 IsEmpty]: Start isEmpty. Operand 990 states and 1532 transitions. [2023-04-03 03:25:32,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2023-04-03 03:25:32,472 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:25:32,472 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 03:25:32,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-03 03:25:32,473 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:25:32,473 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:25:32,473 INFO L85 PathProgramCache]: Analyzing trace with hash 801943656, now seen corresponding path program 1 times [2023-04-03 03:25:32,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:25:32,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312336409] [2023-04-03 03:25:32,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:25:32,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:25:32,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:25:32,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 03:25:32,622 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:25:32,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312336409] [2023-04-03 03:25:32,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312336409] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:25:32,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:25:32,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 03:25:32,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933193675] [2023-04-03 03:25:32,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:25:32,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 03:25:32,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:25:32,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 03:25:32,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 03:25:32,624 INFO L87 Difference]: Start difference. First operand 990 states and 1532 transitions. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 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) [2023-04-03 03:25:32,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:25:32,835 INFO L93 Difference]: Finished difference Result 2422 states and 3763 transitions. [2023-04-03 03:25:32,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 03:25:32,836 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 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 111 [2023-04-03 03:25:32,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:25:32,844 INFO L225 Difference]: With dead ends: 2422 [2023-04-03 03:25:32,844 INFO L226 Difference]: Without dead ends: 1616 [2023-04-03 03:25:32,846 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 03:25:32,846 INFO L413 NwaCegarLoop]: 421 mSDtfsCounter, 151 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 746 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 03:25:32,846 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 746 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 03:25:32,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1616 states. [2023-04-03 03:25:32,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1616 to 1614. [2023-04-03 03:25:32,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1614 states, 1610 states have (on average 1.5440993788819877) internal successors, (2486), 1610 states have internal predecessors, (2486), 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) [2023-04-03 03:25:32,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1614 states to 1614 states and 2489 transitions. [2023-04-03 03:25:32,997 INFO L78 Accepts]: Start accepts. Automaton has 1614 states and 2489 transitions. Word has length 111 [2023-04-03 03:25:32,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:25:32,998 INFO L495 AbstractCegarLoop]: Abstraction has 1614 states and 2489 transitions. [2023-04-03 03:25:32,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 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) [2023-04-03 03:25:32,998 INFO L276 IsEmpty]: Start isEmpty. Operand 1614 states and 2489 transitions. [2023-04-03 03:25:32,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2023-04-03 03:25:32,999 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:25:32,999 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 03:25:32,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-03 03:25:32,999 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:25:33,000 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:25:33,000 INFO L85 PathProgramCache]: Analyzing trace with hash -817065643, now seen corresponding path program 1 times [2023-04-03 03:25:33,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:25:33,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333718713] [2023-04-03 03:25:33,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:25:33,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:25:33,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:25:33,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 03:25:33,212 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:25:33,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333718713] [2023-04-03 03:25:33,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333718713] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:25:33,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:25:33,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 03:25:33,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471599272] [2023-04-03 03:25:33,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:25:33,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 03:25:33,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:25:33,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 03:25:33,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 03:25:33,214 INFO L87 Difference]: Start difference. First operand 1614 states and 2489 transitions. Second operand has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 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) [2023-04-03 03:25:33,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:25:33,534 INFO L93 Difference]: Finished difference Result 3872 states and 6008 transitions. [2023-04-03 03:25:33,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 03:25:33,539 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 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 113 [2023-04-03 03:25:33,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:25:33,549 INFO L225 Difference]: With dead ends: 3872 [2023-04-03 03:25:33,549 INFO L226 Difference]: Without dead ends: 2442 [2023-04-03 03:25:33,552 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 03:25:33,554 INFO L413 NwaCegarLoop]: 374 mSDtfsCounter, 150 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 715 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 03:25:33,556 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 715 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 03:25:33,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2442 states. [2023-04-03 03:25:33,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2442 to 2440. [2023-04-03 03:25:33,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2440 states, 2436 states have (on average 1.5492610837438423) internal successors, (3774), 2436 states have internal predecessors, (3774), 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) [2023-04-03 03:25:33,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2440 states to 2440 states and 3777 transitions. [2023-04-03 03:25:33,876 INFO L78 Accepts]: Start accepts. Automaton has 2440 states and 3777 transitions. Word has length 113 [2023-04-03 03:25:33,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:25:33,876 INFO L495 AbstractCegarLoop]: Abstraction has 2440 states and 3777 transitions. [2023-04-03 03:25:33,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 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) [2023-04-03 03:25:33,876 INFO L276 IsEmpty]: Start isEmpty. Operand 2440 states and 3777 transitions. [2023-04-03 03:25:33,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2023-04-03 03:25:33,878 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:25:33,878 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 03:25:33,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-03 03:25:33,878 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:25:33,879 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:25:33,879 INFO L85 PathProgramCache]: Analyzing trace with hash 1813775096, now seen corresponding path program 1 times [2023-04-03 03:25:33,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:25:33,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613262663] [2023-04-03 03:25:33,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:25:33,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:25:33,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:25:34,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 03:25:34,029 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:25:34,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613262663] [2023-04-03 03:25:34,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613262663] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:25:34,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:25:34,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 03:25:34,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127184699] [2023-04-03 03:25:34,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:25:34,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 03:25:34,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:25:34,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 03:25:34,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 03:25:34,031 INFO L87 Difference]: Start difference. First operand 2440 states and 3777 transitions. Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 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) [2023-04-03 03:25:34,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:25:34,602 INFO L93 Difference]: Finished difference Result 6368 states and 9836 transitions. [2023-04-03 03:25:34,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 03:25:34,603 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 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 116 [2023-04-03 03:25:34,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:25:34,623 INFO L225 Difference]: With dead ends: 6368 [2023-04-03 03:25:34,623 INFO L226 Difference]: Without dead ends: 4134 [2023-04-03 03:25:34,628 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 03:25:34,628 INFO L413 NwaCegarLoop]: 386 mSDtfsCounter, 144 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 712 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 03:25:34,629 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 712 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 03:25:34,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4134 states. [2023-04-03 03:25:35,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4134 to 4132. [2023-04-03 03:25:35,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4132 states, 4128 states have (on average 1.5334302325581395) internal successors, (6330), 4128 states have internal predecessors, (6330), 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) [2023-04-03 03:25:35,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4132 states to 4132 states and 6333 transitions. [2023-04-03 03:25:35,042 INFO L78 Accepts]: Start accepts. Automaton has 4132 states and 6333 transitions. Word has length 116 [2023-04-03 03:25:35,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:25:35,043 INFO L495 AbstractCegarLoop]: Abstraction has 4132 states and 6333 transitions. [2023-04-03 03:25:35,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 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) [2023-04-03 03:25:35,043 INFO L276 IsEmpty]: Start isEmpty. Operand 4132 states and 6333 transitions. [2023-04-03 03:25:35,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2023-04-03 03:25:35,044 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:25:35,044 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 03:25:35,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-03 03:25:35,044 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:25:35,045 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:25:35,045 INFO L85 PathProgramCache]: Analyzing trace with hash 796321723, now seen corresponding path program 1 times [2023-04-03 03:25:35,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:25:35,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733403457] [2023-04-03 03:25:35,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:25:35,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:25:35,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:25:35,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 03:25:35,176 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:25:35,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733403457] [2023-04-03 03:25:35,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733403457] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:25:35,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:25:35,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 03:25:35,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983696953] [2023-04-03 03:25:35,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:25:35,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 03:25:35,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:25:35,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 03:25:35,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 03:25:35,180 INFO L87 Difference]: Start difference. First operand 4132 states and 6333 transitions. Second operand has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 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) [2023-04-03 03:25:35,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:25:35,891 INFO L93 Difference]: Finished difference Result 10314 states and 15873 transitions. [2023-04-03 03:25:35,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 03:25:35,892 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 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 118 [2023-04-03 03:25:35,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:25:35,917 INFO L225 Difference]: With dead ends: 10314 [2023-04-03 03:25:35,917 INFO L226 Difference]: Without dead ends: 6388 [2023-04-03 03:25:35,926 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 03:25:35,927 INFO L413 NwaCegarLoop]: 375 mSDtfsCounter, 143 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 717 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 03:25:35,927 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 717 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 03:25:35,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6388 states. [2023-04-03 03:25:36,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6388 to 6386. [2023-04-03 03:25:36,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6386 states, 6382 states have (on average 1.537292384832341) internal successors, (9811), 6382 states have internal predecessors, (9811), 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) [2023-04-03 03:25:36,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6386 states to 6386 states and 9814 transitions. [2023-04-03 03:25:36,617 INFO L78 Accepts]: Start accepts. Automaton has 6386 states and 9814 transitions. Word has length 118 [2023-04-03 03:25:36,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:25:36,618 INFO L495 AbstractCegarLoop]: Abstraction has 6386 states and 9814 transitions. [2023-04-03 03:25:36,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 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) [2023-04-03 03:25:36,618 INFO L276 IsEmpty]: Start isEmpty. Operand 6386 states and 9814 transitions. [2023-04-03 03:25:36,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2023-04-03 03:25:36,620 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:25:36,620 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 03:25:36,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-03 03:25:36,620 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:25:36,621 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:25:36,621 INFO L85 PathProgramCache]: Analyzing trace with hash 1978831021, now seen corresponding path program 1 times [2023-04-03 03:25:36,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:25:36,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088683385] [2023-04-03 03:25:36,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:25:36,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:25:36,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:25:36,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 03:25:36,816 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:25:36,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088683385] [2023-04-03 03:25:36,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088683385] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:25:36,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:25:36,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-03 03:25:36,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98832787] [2023-04-03 03:25:36,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:25:36,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-03 03:25:36,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:25:36,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-03 03:25:36,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-03 03:25:36,818 INFO L87 Difference]: Start difference. First operand 6386 states and 9814 transitions. Second operand has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 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) [2023-04-03 03:25:38,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:25:38,073 INFO L93 Difference]: Finished difference Result 16010 states and 24680 transitions. [2023-04-03 03:25:38,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-03 03:25:38,073 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 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 121 [2023-04-03 03:25:38,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:25:38,127 INFO L225 Difference]: With dead ends: 16010 [2023-04-03 03:25:38,127 INFO L226 Difference]: Without dead ends: 9798 [2023-04-03 03:25:38,138 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-04-03 03:25:38,140 INFO L413 NwaCegarLoop]: 381 mSDtfsCounter, 1233 mSDsluCounter, 3141 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1233 SdHoareTripleChecker+Valid, 3522 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-03 03:25:38,141 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1233 Valid, 3522 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-03 03:25:38,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9798 states. [2023-04-03 03:25:38,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9798 to 9741. [2023-04-03 03:25:38,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9741 states, 9737 states have (on average 1.54308308513916) internal successors, (15025), 9737 states have internal predecessors, (15025), 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) [2023-04-03 03:25:39,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9741 states to 9741 states and 15028 transitions. [2023-04-03 03:25:39,003 INFO L78 Accepts]: Start accepts. Automaton has 9741 states and 15028 transitions. Word has length 121 [2023-04-03 03:25:39,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:25:39,004 INFO L495 AbstractCegarLoop]: Abstraction has 9741 states and 15028 transitions. [2023-04-03 03:25:39,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 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) [2023-04-03 03:25:39,004 INFO L276 IsEmpty]: Start isEmpty. Operand 9741 states and 15028 transitions. [2023-04-03 03:25:39,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2023-04-03 03:25:39,005 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:25:39,005 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 03:25:39,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-03 03:25:39,006 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:25:39,006 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:25:39,006 INFO L85 PathProgramCache]: Analyzing trace with hash 1148051215, now seen corresponding path program 1 times [2023-04-03 03:25:39,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:25:39,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758241068] [2023-04-03 03:25:39,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:25:39,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:25:39,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:25:39,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 03:25:39,153 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:25:39,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758241068] [2023-04-03 03:25:39,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758241068] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:25:39,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:25:39,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-03 03:25:39,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925124272] [2023-04-03 03:25:39,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:25:39,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-03 03:25:39,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:25:39,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-03 03:25:39,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-03 03:25:39,155 INFO L87 Difference]: Start difference. First operand 9741 states and 15028 transitions. Second operand has 4 states, 4 states have (on average 29.75) internal successors, (119), 4 states have internal predecessors, (119), 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) [2023-04-03 03:25:40,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:25:40,252 INFO L93 Difference]: Finished difference Result 19256 states and 29721 transitions. [2023-04-03 03:25:40,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-03 03:25:40,253 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.75) internal successors, (119), 4 states have internal predecessors, (119), 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 122 [2023-04-03 03:25:40,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:25:40,285 INFO L225 Difference]: With dead ends: 19256 [2023-04-03 03:25:40,285 INFO L226 Difference]: Without dead ends: 9743 [2023-04-03 03:25:40,304 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-03 03:25:40,305 INFO L413 NwaCegarLoop]: 368 mSDtfsCounter, 301 mSDsluCounter, 688 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 1056 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 03:25:40,305 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [301 Valid, 1056 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 03:25:40,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9743 states. [2023-04-03 03:25:41,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9743 to 9734. [2023-04-03 03:25:41,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9734 states, 9730 states have (on average 1.5399794450154163) internal successors, (14984), 9730 states have internal predecessors, (14984), 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) [2023-04-03 03:25:41,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9734 states to 9734 states and 14987 transitions. [2023-04-03 03:25:41,168 INFO L78 Accepts]: Start accepts. Automaton has 9734 states and 14987 transitions. Word has length 122 [2023-04-03 03:25:41,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:25:41,168 INFO L495 AbstractCegarLoop]: Abstraction has 9734 states and 14987 transitions. [2023-04-03 03:25:41,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.75) internal successors, (119), 4 states have internal predecessors, (119), 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) [2023-04-03 03:25:41,169 INFO L276 IsEmpty]: Start isEmpty. Operand 9734 states and 14987 transitions. [2023-04-03 03:25:41,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2023-04-03 03:25:41,171 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:25:41,171 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 03:25:41,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-03 03:25:41,171 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:25:41,172 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:25:41,172 INFO L85 PathProgramCache]: Analyzing trace with hash 813657800, now seen corresponding path program 1 times [2023-04-03 03:25:41,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:25:41,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628377795] [2023-04-03 03:25:41,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:25:41,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:25:41,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:25:41,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 03:25:41,607 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:25:41,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628377795] [2023-04-03 03:25:41,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628377795] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:25:41,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:25:41,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 03:25:41,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41430505] [2023-04-03 03:25:41,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:25:41,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 03:25:41,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:25:41,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 03:25:41,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 03:25:41,609 INFO L87 Difference]: Start difference. First operand 9734 states and 14987 transitions. Second operand has 5 states, 5 states have (on average 25.6) internal successors, (128), 5 states have internal predecessors, (128), 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) [2023-04-03 03:25:43,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:25:43,205 INFO L93 Difference]: Finished difference Result 15584 states and 23757 transitions. [2023-04-03 03:25:43,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-03 03:25:43,206 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.6) internal successors, (128), 5 states have internal predecessors, (128), 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 131 [2023-04-03 03:25:43,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:25:43,250 INFO L225 Difference]: With dead ends: 15584 [2023-04-03 03:25:43,251 INFO L226 Difference]: Without dead ends: 15582 [2023-04-03 03:25:43,255 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-03 03:25:43,256 INFO L413 NwaCegarLoop]: 519 mSDtfsCounter, 309 mSDsluCounter, 1255 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 1774 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 03:25:43,256 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [309 Valid, 1774 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 03:25:43,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15582 states. [2023-04-03 03:25:44,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15582 to 9858. [2023-04-03 03:25:44,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9858 states, 9854 states have (on average 1.5257763344834585) internal successors, (15035), 9854 states have internal predecessors, (15035), 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) [2023-04-03 03:25:44,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9858 states to 9858 states and 15038 transitions. [2023-04-03 03:25:44,356 INFO L78 Accepts]: Start accepts. Automaton has 9858 states and 15038 transitions. Word has length 131 [2023-04-03 03:25:44,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:25:44,357 INFO L495 AbstractCegarLoop]: Abstraction has 9858 states and 15038 transitions. [2023-04-03 03:25:44,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.6) internal successors, (128), 5 states have internal predecessors, (128), 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) [2023-04-03 03:25:44,357 INFO L276 IsEmpty]: Start isEmpty. Operand 9858 states and 15038 transitions. [2023-04-03 03:25:44,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2023-04-03 03:25:44,359 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:25:44,359 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 03:25:44,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-04-03 03:25:44,360 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:25:44,360 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:25:44,360 INFO L85 PathProgramCache]: Analyzing trace with hash -2071015155, now seen corresponding path program 1 times [2023-04-03 03:25:44,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:25:44,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72600322] [2023-04-03 03:25:44,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:25:44,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:25:44,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:25:46,819 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 03:25:46,820 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:25:46,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72600322] [2023-04-03 03:25:46,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72600322] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 03:25:46,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480282576] [2023-04-03 03:25:46,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:25:46,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 03:25:46,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 03:25:46,827 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 03:25:46,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-03 03:25:47,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:25:47,159 INFO L262 TraceCheckSpWp]: Trace formula consists of 1381 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-03 03:25:47,170 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 03:25:47,381 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-03 03:25:47,382 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 03:25:47,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480282576] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:25:47,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 03:25:47,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [17] total 19 [2023-04-03 03:25:47,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577872721] [2023-04-03 03:25:47,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:25:47,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-03 03:25:47,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:25:47,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-03 03:25:47,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2023-04-03 03:25:47,384 INFO L87 Difference]: Start difference. First operand 9858 states and 15038 transitions. Second operand has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 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) [2023-04-03 03:25:49,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:25:49,456 INFO L93 Difference]: Finished difference Result 29083 states and 44332 transitions. [2023-04-03 03:25:49,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-03 03:25:49,457 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 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 143 [2023-04-03 03:25:49,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:25:49,523 INFO L225 Difference]: With dead ends: 29083 [2023-04-03 03:25:49,524 INFO L226 Difference]: Without dead ends: 19248 [2023-04-03 03:25:49,548 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=104, Invalid=276, Unknown=0, NotChecked=0, Total=380 [2023-04-03 03:25:49,548 INFO L413 NwaCegarLoop]: 370 mSDtfsCounter, 1011 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1011 SdHoareTripleChecker+Valid, 721 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 03:25:49,549 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1011 Valid, 721 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 03:25:49,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19248 states. [2023-04-03 03:25:51,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19248 to 19246. [2023-04-03 03:25:51,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19246 states, 19242 states have (on average 1.519176800748363) internal successors, (29232), 19242 states have internal predecessors, (29232), 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) [2023-04-03 03:25:51,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19246 states to 19246 states and 29235 transitions. [2023-04-03 03:25:51,597 INFO L78 Accepts]: Start accepts. Automaton has 19246 states and 29235 transitions. Word has length 143 [2023-04-03 03:25:51,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:25:51,598 INFO L495 AbstractCegarLoop]: Abstraction has 19246 states and 29235 transitions. [2023-04-03 03:25:51,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 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) [2023-04-03 03:25:51,598 INFO L276 IsEmpty]: Start isEmpty. Operand 19246 states and 29235 transitions. [2023-04-03 03:25:51,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2023-04-03 03:25:51,601 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:25:51,601 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 03:25:51,615 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-03 03:25:51,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-04-03 03:25:51,811 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:25:51,812 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:25:51,812 INFO L85 PathProgramCache]: Analyzing trace with hash 1441386865, now seen corresponding path program 1 times [2023-04-03 03:25:51,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:25:51,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409874380] [2023-04-03 03:25:51,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:25:51,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:25:51,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:25:51,946 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-03 03:25:51,946 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:25:51,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409874380] [2023-04-03 03:25:51,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409874380] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:25:51,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:25:51,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 03:25:51,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111935484] [2023-04-03 03:25:51,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:25:51,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 03:25:51,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:25:51,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 03:25:51,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 03:25:51,949 INFO L87 Difference]: Start difference. First operand 19246 states and 29235 transitions. Second operand has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 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) [2023-04-03 03:25:54,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:25:54,503 INFO L93 Difference]: Finished difference Result 44421 states and 67660 transitions. [2023-04-03 03:25:54,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 03:25:54,504 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 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 144 [2023-04-03 03:25:54,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:25:54,579 INFO L225 Difference]: With dead ends: 44421 [2023-04-03 03:25:54,579 INFO L226 Difference]: Without dead ends: 25539 [2023-04-03 03:25:54,617 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 03:25:54,618 INFO L413 NwaCegarLoop]: 378 mSDtfsCounter, 150 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 718 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 03:25:54,618 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 718 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 03:25:54,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25539 states. [2023-04-03 03:25:57,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25539 to 25537. [2023-04-03 03:25:57,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25537 states, 25533 states have (on average 1.507813417929738) internal successors, (38499), 25533 states have internal predecessors, (38499), 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) [2023-04-03 03:25:57,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25537 states to 25537 states and 38502 transitions. [2023-04-03 03:25:57,339 INFO L78 Accepts]: Start accepts. Automaton has 25537 states and 38502 transitions. Word has length 144 [2023-04-03 03:25:57,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:25:57,340 INFO L495 AbstractCegarLoop]: Abstraction has 25537 states and 38502 transitions. [2023-04-03 03:25:57,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 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) [2023-04-03 03:25:57,340 INFO L276 IsEmpty]: Start isEmpty. Operand 25537 states and 38502 transitions. [2023-04-03 03:25:57,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2023-04-03 03:25:57,349 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:25:57,349 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 03:25:57,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-04-03 03:25:57,350 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:25:57,350 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:25:57,350 INFO L85 PathProgramCache]: Analyzing trace with hash 423310448, now seen corresponding path program 1 times [2023-04-03 03:25:57,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:25:57,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897383197] [2023-04-03 03:25:57,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:25:57,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:25:57,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:25:57,441 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-03 03:25:57,441 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:25:57,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897383197] [2023-04-03 03:25:57,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897383197] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:25:57,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:25:57,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 03:25:57,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331883823] [2023-04-03 03:25:57,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:25:57,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 03:25:57,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:25:57,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 03:25:57,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 03:25:57,444 INFO L87 Difference]: Start difference. First operand 25537 states and 38502 transitions. Second operand has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 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) [2023-04-03 03:26:02,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:26:02,327 INFO L93 Difference]: Finished difference Result 76532 states and 115386 transitions. [2023-04-03 03:26:02,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 03:26:02,328 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 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 145 [2023-04-03 03:26:02,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:26:02,474 INFO L225 Difference]: With dead ends: 76532 [2023-04-03 03:26:02,475 INFO L226 Difference]: Without dead ends: 51038 [2023-04-03 03:26:02,530 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 03:26:02,531 INFO L413 NwaCegarLoop]: 367 mSDtfsCounter, 358 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 358 SdHoareTripleChecker+Valid, 725 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 03:26:02,531 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [358 Valid, 725 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 03:26:02,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51038 states. [2023-04-03 03:26:06,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51038 to 25549. [2023-04-03 03:26:06,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25549 states, 25545 states have (on average 1.5076923076923077) internal successors, (38514), 25545 states have internal predecessors, (38514), 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) [2023-04-03 03:26:06,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25549 states to 25549 states and 38517 transitions. [2023-04-03 03:26:06,199 INFO L78 Accepts]: Start accepts. Automaton has 25549 states and 38517 transitions. Word has length 145 [2023-04-03 03:26:06,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:26:06,199 INFO L495 AbstractCegarLoop]: Abstraction has 25549 states and 38517 transitions. [2023-04-03 03:26:06,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 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) [2023-04-03 03:26:06,200 INFO L276 IsEmpty]: Start isEmpty. Operand 25549 states and 38517 transitions. [2023-04-03 03:26:06,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2023-04-03 03:26:06,202 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:26:06,202 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 03:26:06,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-04-03 03:26:06,203 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:26:06,203 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:26:06,203 INFO L85 PathProgramCache]: Analyzing trace with hash -1542864015, now seen corresponding path program 1 times [2023-04-03 03:26:06,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:26:06,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066394478] [2023-04-03 03:26:06,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:26:06,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:26:06,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:26:06,409 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-03 03:26:06,409 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:26:06,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066394478] [2023-04-03 03:26:06,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066394478] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:26:06,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:26:06,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 03:26:06,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796656212] [2023-04-03 03:26:06,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:26:06,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 03:26:06,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:26:06,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 03:26:06,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 03:26:06,412 INFO L87 Difference]: Start difference. First operand 25549 states and 38517 transitions. Second operand has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 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) [2023-04-03 03:26:12,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:26:12,912 INFO L93 Difference]: Finished difference Result 74989 states and 112916 transitions. [2023-04-03 03:26:12,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 03:26:12,913 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 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 145 [2023-04-03 03:26:12,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:26:13,033 INFO L225 Difference]: With dead ends: 74989 [2023-04-03 03:26:13,033 INFO L226 Difference]: Without dead ends: 49571 [2023-04-03 03:26:13,068 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 03:26:13,069 INFO L413 NwaCegarLoop]: 574 mSDtfsCounter, 267 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 924 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 03:26:13,069 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [267 Valid, 924 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 03:26:13,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49571 states. [2023-04-03 03:26:19,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49571 to 49569. [2023-04-03 03:26:19,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49569 states, 49565 states have (on average 1.499082013517603) internal successors, (74302), 49565 states have internal predecessors, (74302), 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) [2023-04-03 03:26:19,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49569 states to 49569 states and 74305 transitions. [2023-04-03 03:26:19,372 INFO L78 Accepts]: Start accepts. Automaton has 49569 states and 74305 transitions. Word has length 145 [2023-04-03 03:26:19,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:26:19,372 INFO L495 AbstractCegarLoop]: Abstraction has 49569 states and 74305 transitions. [2023-04-03 03:26:19,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 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) [2023-04-03 03:26:19,372 INFO L276 IsEmpty]: Start isEmpty. Operand 49569 states and 74305 transitions. [2023-04-03 03:26:19,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2023-04-03 03:26:19,376 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:26:19,377 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 03:26:19,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-04-03 03:26:19,377 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:26:19,377 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:26:19,377 INFO L85 PathProgramCache]: Analyzing trace with hash -722243818, now seen corresponding path program 1 times [2023-04-03 03:26:19,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:26:19,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049905252] [2023-04-03 03:26:19,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:26:19,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:26:19,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:26:19,480 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-03 03:26:19,481 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:26:19,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049905252] [2023-04-03 03:26:19,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049905252] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:26:19,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:26:19,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 03:26:19,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536329552] [2023-04-03 03:26:19,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:26:19,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 03:26:19,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:26:19,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 03:26:19,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 03:26:19,482 INFO L87 Difference]: Start difference. First operand 49569 states and 74305 transitions. Second operand has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 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) [2023-04-03 03:26:27,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:26:27,968 INFO L93 Difference]: Finished difference Result 115855 states and 174269 transitions. [2023-04-03 03:26:27,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 03:26:27,969 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 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 146 [2023-04-03 03:26:27,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:26:28,107 INFO L225 Difference]: With dead ends: 115855 [2023-04-03 03:26:28,107 INFO L226 Difference]: Without dead ends: 66863 [2023-04-03 03:26:28,292 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 03:26:28,294 INFO L413 NwaCegarLoop]: 381 mSDtfsCounter, 157 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 720 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 03:26:28,295 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 720 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 03:26:28,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66863 states. [2023-04-03 03:26:36,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66863 to 66861. [2023-04-03 03:26:36,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66861 states, 66857 states have (on average 1.485768131983188) internal successors, (99334), 66857 states have internal predecessors, (99334), 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) [2023-04-03 03:26:36,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66861 states to 66861 states and 99337 transitions. [2023-04-03 03:26:36,432 INFO L78 Accepts]: Start accepts. Automaton has 66861 states and 99337 transitions. Word has length 146 [2023-04-03 03:26:36,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:26:36,432 INFO L495 AbstractCegarLoop]: Abstraction has 66861 states and 99337 transitions. [2023-04-03 03:26:36,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 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) [2023-04-03 03:26:36,432 INFO L276 IsEmpty]: Start isEmpty. Operand 66861 states and 99337 transitions. [2023-04-03 03:26:36,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2023-04-03 03:26:36,435 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:26:36,435 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 03:26:36,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-04-03 03:26:36,436 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:26:36,436 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:26:36,436 INFO L85 PathProgramCache]: Analyzing trace with hash 2105923619, now seen corresponding path program 1 times [2023-04-03 03:26:36,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:26:36,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757356574] [2023-04-03 03:26:36,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:26:36,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:26:36,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:26:38,078 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-03 03:26:38,078 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:26:38,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757356574] [2023-04-03 03:26:38,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757356574] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 03:26:38,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285705694] [2023-04-03 03:26:38,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:26:38,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 03:26:38,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 03:26:38,080 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 03:26:38,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-03 03:26:38,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:26:38,389 INFO L262 TraceCheckSpWp]: Trace formula consists of 1384 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-03 03:26:38,395 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 03:26:38,578 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-03 03:26:38,578 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 03:26:38,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285705694] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:26:38,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 03:26:38,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [13] total 15 [2023-04-03 03:26:38,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35937899] [2023-04-03 03:26:38,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:26:38,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-03 03:26:38,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:26:38,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-03 03:26:38,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2023-04-03 03:26:38,580 INFO L87 Difference]: Start difference. First operand 66861 states and 99337 transitions. Second operand has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 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) [2023-04-03 03:26:56,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:26:56,366 INFO L93 Difference]: Finished difference Result 197697 states and 293412 transitions. [2023-04-03 03:26:56,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-03 03:26:56,367 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 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 146 [2023-04-03 03:26:56,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:26:56,671 INFO L225 Difference]: With dead ends: 197697 [2023-04-03 03:26:56,671 INFO L226 Difference]: Without dead ends: 130969 [2023-04-03 03:26:56,755 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2023-04-03 03:26:56,756 INFO L413 NwaCegarLoop]: 364 mSDtfsCounter, 889 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 889 SdHoareTripleChecker+Valid, 719 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 03:26:56,756 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [889 Valid, 719 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 03:26:56,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130969 states.