/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.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 06:46:08,278 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 06:46:08,280 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 06:46:08,320 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-04-01 06:46:08,335 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 06:46:08,336 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 06:46:08,337 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 06:46:08,338 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 06:46:08,338 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 06:46:08,339 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 06:46:08,340 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 06:46:08,341 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 06:46:08,342 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 06:46:08,343 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 06:46:08,344 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 06:46:08,345 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 06:46:08,347 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 06:46:08,348 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 06:46:08,348 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 06:46:08,349 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 06:46:08,349 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 06:46:08,350 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 06:46:08,350 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 06:46:08,350 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 06:46:08,351 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 06:46:08,352 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 06:46:08,352 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 06:46:08,353 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 06:46:08,353 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 06:46:08,353 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 06:46:08,354 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 06:46:08,354 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 06:46:08,355 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 06:46:08,356 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 06:46:08,374 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 06:46:08,374 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 06:46:08,375 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 06:46:08,375 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 06:46:08,375 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 06:46:08,376 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 06:46:08,376 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 06:46:08,376 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 06:46:08,376 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 06:46:08,376 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 06:46:08,376 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 06:46:08,377 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 06:46:08,377 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 06:46:08,377 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 06:46:08,377 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 06:46:08,377 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 06:46:08,377 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 06:46:08,378 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 06:46:08,378 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 06:46:08,378 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 06:46:08,379 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 06:46:08,379 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 06:46:08,379 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 06:46:08,379 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 06:46:08,379 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 06:46:08,379 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 06:46:08,381 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 06:46:08,381 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 06:46:08,382 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 06:46:08,382 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 06:46:08,382 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 06:46:08,382 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 06:46:08,382 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 06:46:08,382 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 06:46:08,383 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 06:46:08,383 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 06:46:08,383 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 06:46:08,383 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 06:46:08,383 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 06:46:08,383 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 06:46:08,383 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 06:46:08,384 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 06:46:08,630 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 06:46:08,662 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 06:46:08,665 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 06:46:08,666 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 06:46:08,667 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 06:46:08,668 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-04-01 06:46:09,849 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 06:46:10,144 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 06:46:10,145 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-04-01 06:46:10,158 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d5535e3c/c21893e6daf24341a890afc7a94fa95b/FLAG222b37564 [2023-04-01 06:46:10,171 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d5535e3c/c21893e6daf24341a890afc7a94fa95b [2023-04-01 06:46:10,174 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 06:46:10,176 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 06:46:10,178 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 06:46:10,178 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 06:46:10,181 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 06:46:10,182 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 06:46:10" (1/1) ... [2023-04-01 06:46:10,183 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a4098c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:46:10, skipping insertion in model container [2023-04-01 06:46:10,183 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 06:46:10" (1/1) ... [2023-04-01 06:46:10,190 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 06:46:10,243 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 06:46:10,494 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.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[13867,13880] [2023-04-01 06:46:10,572 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 06:46:10,590 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 06:46:10,661 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.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[13867,13880] [2023-04-01 06:46:10,697 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 06:46:10,725 INFO L208 MainTranslator]: Completed translation [2023-04-01 06:46:10,726 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:46:10 WrapperNode [2023-04-01 06:46:10,726 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 06:46:10,727 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 06:46:10,727 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 06:46:10,727 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 06:46:10,736 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:46:10" (1/1) ... [2023-04-01 06:46:10,736 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:46:10" (1/1) ... [2023-04-01 06:46:10,752 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:46:10" (1/1) ... [2023-04-01 06:46:10,753 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:46:10" (1/1) ... [2023-04-01 06:46:10,794 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:46:10" (1/1) ... [2023-04-01 06:46:10,810 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:46:10" (1/1) ... [2023-04-01 06:46:10,817 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:46:10" (1/1) ... [2023-04-01 06:46:10,823 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:46:10" (1/1) ... [2023-04-01 06:46:10,832 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 06:46:10,833 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 06:46:10,833 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 06:46:10,833 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 06:46:10,834 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:46:10" (1/1) ... [2023-04-01 06:46:10,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 06:46:10,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 06:46:10,862 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 06:46:10,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 06:46:10,900 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 06:46:10,900 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 06:46:10,900 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 06:46:10,901 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 06:46:10,901 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 06:46:10,901 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 06:46:10,901 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 06:46:10,901 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 06:46:10,901 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 06:46:10,901 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-01 06:46:10,901 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2023-04-01 06:46:10,901 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-01 06:46:10,901 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-01 06:46:10,902 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 06:46:10,902 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-01 06:46:10,902 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-01 06:46:10,902 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-01 06:46:10,902 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-01 06:46:10,902 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-01 06:46:10,902 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2023-04-01 06:46:10,902 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-01 06:46:10,902 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-01 06:46:10,902 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 06:46:10,903 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 06:46:10,903 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 06:46:10,903 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 06:46:10,903 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 06:46:10,903 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 06:46:10,903 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 06:46:11,109 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 06:46:11,111 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 06:46:12,140 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 06:46:12,494 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 06:46:12,494 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-01 06:46:12,499 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 06:46:12 BoogieIcfgContainer [2023-04-01 06:46:12,499 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 06:46:12,503 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 06:46:12,503 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 06:46:12,506 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 06:46:12,506 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 06:46:10" (1/3) ... [2023-04-01 06:46:12,507 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23fc257c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 06:46:12, skipping insertion in model container [2023-04-01 06:46:12,507 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:46:10" (2/3) ... [2023-04-01 06:46:12,507 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23fc257c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 06:46:12, skipping insertion in model container [2023-04-01 06:46:12,508 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 06:46:12" (3/3) ... [2023-04-01 06:46:12,509 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-04-01 06:46:12,525 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 06:46:12,525 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 06:46:12,598 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 06:46:12,606 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;@e9af9f1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 06:46:12,606 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 06:46:12,615 INFO L276 IsEmpty]: Start isEmpty. Operand has 288 states, 275 states have (on average 1.6872727272727273) internal successors, (464), 283 states have internal predecessors, (464), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 06:46:12,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2023-04-01 06:46:12,628 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:46:12,629 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] [2023-04-01 06:46:12,630 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:46:12,635 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:46:12,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1002429573, now seen corresponding path program 1 times [2023-04-01 06:46:12,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:46:12,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058075741] [2023-04-01 06:46:12,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:46:12,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:46:12,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:46:13,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:46:13,329 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:46:13,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058075741] [2023-04-01 06:46:13,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058075741] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:46:13,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:46:13,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 06:46:13,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079245748] [2023-04-01 06:46:13,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:46:13,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:46:13,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:46:13,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:46:13,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:46:13,380 INFO L87 Difference]: Start difference. First operand has 288 states, 275 states have (on average 1.6872727272727273) internal successors, (464), 283 states have internal predecessors, (464), 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 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) [2023-04-01 06:46:13,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:46:13,624 INFO L93 Difference]: Finished difference Result 500 states and 789 transitions. [2023-04-01 06:46:13,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 06:46:13,626 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 [2023-04-01 06:46:13,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:46:13,644 INFO L225 Difference]: With dead ends: 500 [2023-04-01 06:46:13,645 INFO L226 Difference]: Without dead ends: 362 [2023-04-01 06:46:13,650 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:46:13,659 INFO L413 NwaCegarLoop]: 572 mSDtfsCounter, 183 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 954 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 [2023-04-01 06:46:13,660 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [183 Valid, 954 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 06:46:13,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2023-04-01 06:46:13,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 360. [2023-04-01 06:46:13,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 356 states have (on average 1.5112359550561798) internal successors, (538), 356 states have internal predecessors, (538), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:46:13,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 541 transitions. [2023-04-01 06:46:13,754 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 541 transitions. Word has length 113 [2023-04-01 06:46:13,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:46:13,756 INFO L495 AbstractCegarLoop]: Abstraction has 360 states and 541 transitions. [2023-04-01 06:46:13,756 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) [2023-04-01 06:46:13,756 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 541 transitions. [2023-04-01 06:46:13,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2023-04-01 06:46:13,764 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:46:13,765 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] [2023-04-01 06:46:13,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 06:46:13,765 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:46:13,767 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:46:13,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1193034042, now seen corresponding path program 1 times [2023-04-01 06:46:13,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:46:13,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821887714] [2023-04-01 06:46:13,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:46:13,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:46:13,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:46:14,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:46:14,076 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:46:14,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821887714] [2023-04-01 06:46:14,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821887714] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:46:14,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:46:14,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 06:46:14,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149558651] [2023-04-01 06:46:14,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:46:14,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:46:14,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:46:14,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:46:14,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:46:14,080 INFO L87 Difference]: Start difference. First operand 360 states and 541 transitions. Second operand has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:46:14,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:46:14,207 INFO L93 Difference]: Finished difference Result 654 states and 1005 transitions. [2023-04-01 06:46:14,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 06:46:14,210 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 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 115 [2023-04-01 06:46:14,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:46:14,220 INFO L225 Difference]: With dead ends: 654 [2023-04-01 06:46:14,220 INFO L226 Difference]: Without dead ends: 466 [2023-04-01 06:46:14,226 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:46:14,227 INFO L413 NwaCegarLoop]: 376 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, 708 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 [2023-04-01 06:46:14,228 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 708 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 06:46:14,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2023-04-01 06:46:14,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 464. [2023-04-01 06:46:14,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 460 states have (on average 1.5217391304347827) internal successors, (700), 460 states have internal predecessors, (700), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:46:14,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 703 transitions. [2023-04-01 06:46:14,262 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 703 transitions. Word has length 115 [2023-04-01 06:46:14,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:46:14,264 INFO L495 AbstractCegarLoop]: Abstraction has 464 states and 703 transitions. [2023-04-01 06:46:14,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:46:14,264 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 703 transitions. [2023-04-01 06:46:14,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2023-04-01 06:46:14,267 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:46:14,267 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] [2023-04-01 06:46:14,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 06:46:14,267 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:46:14,268 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:46:14,268 INFO L85 PathProgramCache]: Analyzing trace with hash 321365001, now seen corresponding path program 1 times [2023-04-01 06:46:14,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:46:14,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953405551] [2023-04-01 06:46:14,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:46:14,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:46:14,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:46:14,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:46:14,479 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:46:14,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953405551] [2023-04-01 06:46:14,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953405551] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:46:14,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:46:14,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 06:46:14,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033149343] [2023-04-01 06:46:14,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:46:14,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:46:14,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:46:14,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:46:14,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:46:14,483 INFO L87 Difference]: Start difference. First operand 464 states and 703 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) [2023-04-01 06:46:14,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:46:14,615 INFO L93 Difference]: Finished difference Result 984 states and 1518 transitions. [2023-04-01 06:46:14,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 06:46:14,616 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 [2023-04-01 06:46:14,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:46:14,621 INFO L225 Difference]: With dead ends: 984 [2023-04-01 06:46:14,621 INFO L226 Difference]: Without dead ends: 694 [2023-04-01 06:46:14,624 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:46:14,628 INFO L413 NwaCegarLoop]: 468 mSDtfsCounter, 158 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 804 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 [2023-04-01 06:46:14,630 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 804 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 06:46:14,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2023-04-01 06:46:14,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 692. [2023-04-01 06:46:14,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 692 states, 688 states have (on average 1.5319767441860466) internal successors, (1054), 688 states have internal predecessors, (1054), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:46:14,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 692 states to 692 states and 1057 transitions. [2023-04-01 06:46:14,679 INFO L78 Accepts]: Start accepts. Automaton has 692 states and 1057 transitions. Word has length 118 [2023-04-01 06:46:14,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:46:14,681 INFO L495 AbstractCegarLoop]: Abstraction has 692 states and 1057 transitions. [2023-04-01 06:46:14,682 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) [2023-04-01 06:46:14,682 INFO L276 IsEmpty]: Start isEmpty. Operand 692 states and 1057 transitions. [2023-04-01 06:46:14,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2023-04-01 06:46:14,683 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:46:14,683 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] [2023-04-01 06:46:14,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 06:46:14,683 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:46:14,684 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:46:14,685 INFO L85 PathProgramCache]: Analyzing trace with hash -877103469, now seen corresponding path program 1 times [2023-04-01 06:46:14,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:46:14,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142799408] [2023-04-01 06:46:14,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:46:14,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:46:14,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:46:14,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:46:14,918 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:46:14,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142799408] [2023-04-01 06:46:14,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142799408] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:46:14,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:46:14,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 06:46:14,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095516449] [2023-04-01 06:46:14,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:46:14,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:46:14,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:46:14,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:46:14,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:46:14,920 INFO L87 Difference]: Start difference. First operand 692 states and 1057 transitions. Second operand has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:46:15,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:46:15,081 INFO L93 Difference]: Finished difference Result 1522 states and 2359 transitions. [2023-04-01 06:46:15,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 06:46:15,082 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 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 120 [2023-04-01 06:46:15,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:46:15,087 INFO L225 Difference]: With dead ends: 1522 [2023-04-01 06:46:15,087 INFO L226 Difference]: Without dead ends: 1004 [2023-04-01 06:46:15,088 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:46:15,089 INFO L413 NwaCegarLoop]: 385 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, 725 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 [2023-04-01 06:46:15,089 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 725 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 06:46:15,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1004 states. [2023-04-01 06:46:15,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1004 to 1002. [2023-04-01 06:46:15,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1002 states, 998 states have (on average 1.5440881763527055) internal successors, (1541), 998 states have internal predecessors, (1541), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:46:15,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1002 states to 1002 states and 1544 transitions. [2023-04-01 06:46:15,174 INFO L78 Accepts]: Start accepts. Automaton has 1002 states and 1544 transitions. Word has length 120 [2023-04-01 06:46:15,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:46:15,175 INFO L495 AbstractCegarLoop]: Abstraction has 1002 states and 1544 transitions. [2023-04-01 06:46:15,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:46:15,175 INFO L276 IsEmpty]: Start isEmpty. Operand 1002 states and 1544 transitions. [2023-04-01 06:46:15,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-04-01 06:46:15,177 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:46:15,177 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] [2023-04-01 06:46:15,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 06:46:15,177 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:46:15,178 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:46:15,178 INFO L85 PathProgramCache]: Analyzing trace with hash -1229634651, now seen corresponding path program 1 times [2023-04-01 06:46:15,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:46:15,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788049348] [2023-04-01 06:46:15,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:46:15,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:46:15,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:46:15,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:46:15,339 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:46:15,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788049348] [2023-04-01 06:46:15,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788049348] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:46:15,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:46:15,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 06:46:15,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496705627] [2023-04-01 06:46:15,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:46:15,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:46:15,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:46:15,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:46:15,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:46:15,347 INFO L87 Difference]: Start difference. First operand 1002 states and 1544 transitions. Second operand has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:46:15,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:46:15,571 INFO L93 Difference]: Finished difference Result 2434 states and 3775 transitions. [2023-04-01 06:46:15,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 06:46:15,572 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 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 123 [2023-04-01 06:46:15,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:46:15,579 INFO L225 Difference]: With dead ends: 2434 [2023-04-01 06:46:15,580 INFO L226 Difference]: Without dead ends: 1628 [2023-04-01 06:46:15,582 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:46:15,582 INFO L413 NwaCegarLoop]: 433 mSDtfsCounter, 151 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 770 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 [2023-04-01 06:46:15,583 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 770 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 06:46:15,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1628 states. [2023-04-01 06:46:15,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1628 to 1626. [2023-04-01 06:46:15,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1626 states, 1622 states have (on average 1.5400739827373613) internal successors, (2498), 1622 states have internal predecessors, (2498), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:46:15,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1626 states to 1626 states and 2501 transitions. [2023-04-01 06:46:15,749 INFO L78 Accepts]: Start accepts. Automaton has 1626 states and 2501 transitions. Word has length 123 [2023-04-01 06:46:15,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:46:15,749 INFO L495 AbstractCegarLoop]: Abstraction has 1626 states and 2501 transitions. [2023-04-01 06:46:15,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:46:15,749 INFO L276 IsEmpty]: Start isEmpty. Operand 1626 states and 2501 transitions. [2023-04-01 06:46:15,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2023-04-01 06:46:15,751 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:46:15,751 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] [2023-04-01 06:46:15,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 06:46:15,751 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:46:15,751 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:46:15,751 INFO L85 PathProgramCache]: Analyzing trace with hash -643066824, now seen corresponding path program 1 times [2023-04-01 06:46:15,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:46:15,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672943846] [2023-04-01 06:46:15,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:46:15,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:46:15,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:46:15,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:46:15,886 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:46:15,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672943846] [2023-04-01 06:46:15,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672943846] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:46:15,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:46:15,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 06:46:15,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750617850] [2023-04-01 06:46:15,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:46:15,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:46:15,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:46:15,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:46:15,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:46:15,888 INFO L87 Difference]: Start difference. First operand 1626 states and 2501 transitions. Second operand has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:46:16,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:46:16,172 INFO L93 Difference]: Finished difference Result 3884 states and 6020 transitions. [2023-04-01 06:46:16,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 06:46:16,175 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 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 125 [2023-04-01 06:46:16,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:46:16,186 INFO L225 Difference]: With dead ends: 3884 [2023-04-01 06:46:16,186 INFO L226 Difference]: Without dead ends: 2454 [2023-04-01 06:46:16,190 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:46:16,190 INFO L413 NwaCegarLoop]: 386 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, 727 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 [2023-04-01 06:46:16,190 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 727 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 06:46:16,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2454 states. [2023-04-01 06:46:16,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2454 to 2452. [2023-04-01 06:46:16,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2452 states, 2448 states have (on average 1.5465686274509804) internal successors, (3786), 2448 states have internal predecessors, (3786), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:46:16,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2452 states to 2452 states and 3789 transitions. [2023-04-01 06:46:16,449 INFO L78 Accepts]: Start accepts. Automaton has 2452 states and 3789 transitions. Word has length 125 [2023-04-01 06:46:16,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:46:16,449 INFO L495 AbstractCegarLoop]: Abstraction has 2452 states and 3789 transitions. [2023-04-01 06:46:16,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:46:16,449 INFO L276 IsEmpty]: Start isEmpty. Operand 2452 states and 3789 transitions. [2023-04-01 06:46:16,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2023-04-01 06:46:16,450 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:46:16,451 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] [2023-04-01 06:46:16,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-01 06:46:16,451 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:46:16,451 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:46:16,451 INFO L85 PathProgramCache]: Analyzing trace with hash 168572001, now seen corresponding path program 1 times [2023-04-01 06:46:16,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:46:16,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861885378] [2023-04-01 06:46:16,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:46:16,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:46:16,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:46:16,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:46:16,575 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:46:16,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861885378] [2023-04-01 06:46:16,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861885378] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:46:16,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:46:16,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 06:46:16,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662912546] [2023-04-01 06:46:16,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:46:16,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:46:16,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:46:16,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:46:16,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:46:16,577 INFO L87 Difference]: Start difference. First operand 2452 states and 3789 transitions. Second operand has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:46:17,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:46:17,140 INFO L93 Difference]: Finished difference Result 6380 states and 9848 transitions. [2023-04-01 06:46:17,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 06:46:17,141 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 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 128 [2023-04-01 06:46:17,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:46:17,158 INFO L225 Difference]: With dead ends: 6380 [2023-04-01 06:46:17,159 INFO L226 Difference]: Without dead ends: 4146 [2023-04-01 06:46:17,167 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:46:17,170 INFO L413 NwaCegarLoop]: 398 mSDtfsCounter, 144 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 736 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 [2023-04-01 06:46:17,170 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 736 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 06:46:17,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4146 states. [2023-04-01 06:46:17,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4146 to 4144. [2023-04-01 06:46:17,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4144 states, 4140 states have (on average 1.5318840579710145) internal successors, (6342), 4140 states have internal predecessors, (6342), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:46:17,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4144 states to 4144 states and 6345 transitions. [2023-04-01 06:46:17,695 INFO L78 Accepts]: Start accepts. Automaton has 4144 states and 6345 transitions. Word has length 128 [2023-04-01 06:46:17,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:46:17,695 INFO L495 AbstractCegarLoop]: Abstraction has 4144 states and 6345 transitions. [2023-04-01 06:46:17,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:46:17,696 INFO L276 IsEmpty]: Start isEmpty. Operand 4144 states and 6345 transitions. [2023-04-01 06:46:17,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2023-04-01 06:46:17,697 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:46:17,697 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] [2023-04-01 06:46:17,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-01 06:46:17,698 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:46:17,698 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:46:17,698 INFO L85 PathProgramCache]: Analyzing trace with hash -1473358453, now seen corresponding path program 1 times [2023-04-01 06:46:17,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:46:17,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642262199] [2023-04-01 06:46:17,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:46:17,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:46:17,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:46:17,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:46:17,832 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:46:17,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642262199] [2023-04-01 06:46:17,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642262199] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:46:17,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:46:17,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 06:46:17,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485504219] [2023-04-01 06:46:17,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:46:17,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:46:17,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:46:17,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:46:17,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:46:17,834 INFO L87 Difference]: Start difference. First operand 4144 states and 6345 transitions. Second operand has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:46:18,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:46:18,564 INFO L93 Difference]: Finished difference Result 10326 states and 15885 transitions. [2023-04-01 06:46:18,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 06:46:18,565 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 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 130 [2023-04-01 06:46:18,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:46:18,597 INFO L225 Difference]: With dead ends: 10326 [2023-04-01 06:46:18,597 INFO L226 Difference]: Without dead ends: 6400 [2023-04-01 06:46:18,608 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:46:18,609 INFO L413 NwaCegarLoop]: 387 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, 729 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 [2023-04-01 06:46:18,609 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 729 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 06:46:18,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6400 states. [2023-04-01 06:46:19,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6400 to 6398. [2023-04-01 06:46:19,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6398 states, 6394 states have (on average 1.5362840162652487) internal successors, (9823), 6394 states have internal predecessors, (9823), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:46:19,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6398 states to 6398 states and 9826 transitions. [2023-04-01 06:46:19,365 INFO L78 Accepts]: Start accepts. Automaton has 6398 states and 9826 transitions. Word has length 130 [2023-04-01 06:46:19,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:46:19,366 INFO L495 AbstractCegarLoop]: Abstraction has 6398 states and 9826 transitions. [2023-04-01 06:46:19,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:46:19,366 INFO L276 IsEmpty]: Start isEmpty. Operand 6398 states and 9826 transitions. [2023-04-01 06:46:19,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2023-04-01 06:46:19,367 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:46:19,367 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:46:19,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-01 06:46:19,368 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:46:19,368 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:46:19,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1665159805, now seen corresponding path program 1 times [2023-04-01 06:46:19,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:46:19,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480954585] [2023-04-01 06:46:19,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:46:19,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:46:19,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:46:19,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:46:19,615 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:46:19,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480954585] [2023-04-01 06:46:19,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480954585] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:46:19,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:46:19,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 06:46:19,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438487214] [2023-04-01 06:46:19,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:46:19,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 06:46:19,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:46:19,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 06:46:19,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-01 06:46:19,618 INFO L87 Difference]: Start difference. First operand 6398 states and 9826 transitions. Second operand has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:46:20,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:46:20,951 INFO L93 Difference]: Finished difference Result 16022 states and 24692 transitions. [2023-04-01 06:46:20,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 06:46:20,951 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 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 133 [2023-04-01 06:46:20,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:46:21,008 INFO L225 Difference]: With dead ends: 16022 [2023-04-01 06:46:21,009 INFO L226 Difference]: Without dead ends: 9810 [2023-04-01 06:46:21,030 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 [2023-04-01 06:46:21,032 INFO L413 NwaCegarLoop]: 393 mSDtfsCounter, 1233 mSDsluCounter, 3189 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1233 SdHoareTripleChecker+Valid, 3582 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 06:46:21,033 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1233 Valid, 3582 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 06:46:21,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9810 states. [2023-04-01 06:46:22,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9810 to 9753. [2023-04-01 06:46:22,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9753 states, 9749 states have (on average 1.5424146066263207) internal successors, (15037), 9749 states have internal predecessors, (15037), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:46:22,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9753 states to 9753 states and 15040 transitions. [2023-04-01 06:46:22,099 INFO L78 Accepts]: Start accepts. Automaton has 9753 states and 15040 transitions. Word has length 133 [2023-04-01 06:46:22,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:46:22,100 INFO L495 AbstractCegarLoop]: Abstraction has 9753 states and 15040 transitions. [2023-04-01 06:46:22,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:46:22,101 INFO L276 IsEmpty]: Start isEmpty. Operand 9753 states and 15040 transitions. [2023-04-01 06:46:22,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2023-04-01 06:46:22,102 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:46:22,102 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:46:22,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-01 06:46:22,103 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:46:22,103 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:46:22,103 INFO L85 PathProgramCache]: Analyzing trace with hash -146514655, now seen corresponding path program 1 times [2023-04-01 06:46:22,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:46:22,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795052016] [2023-04-01 06:46:22,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:46:22,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:46:22,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:46:22,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:46:22,263 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:46:22,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795052016] [2023-04-01 06:46:22,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795052016] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:46:22,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:46:22,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 06:46:22,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846191242] [2023-04-01 06:46:22,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:46:22,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 06:46:22,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:46:22,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 06:46:22,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 06:46:22,265 INFO L87 Difference]: Start difference. First operand 9753 states and 15040 transitions. Second operand has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:46:23,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:46:23,422 INFO L93 Difference]: Finished difference Result 19268 states and 29733 transitions. [2023-04-01 06:46:23,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 06:46:23,422 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 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 134 [2023-04-01 06:46:23,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:46:23,449 INFO L225 Difference]: With dead ends: 19268 [2023-04-01 06:46:23,449 INFO L226 Difference]: Without dead ends: 9755 [2023-04-01 06:46:23,469 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-01 06:46:23,470 INFO L413 NwaCegarLoop]: 380 mSDtfsCounter, 301 mSDsluCounter, 712 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 1092 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 [2023-04-01 06:46:23,471 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [301 Valid, 1092 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 06:46:23,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9755 states. [2023-04-01 06:46:24,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9755 to 9746. [2023-04-01 06:46:24,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9746 states, 9742 states have (on average 1.5393143091767605) internal successors, (14996), 9742 states have internal predecessors, (14996), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:46:24,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9746 states to 9746 states and 14999 transitions. [2023-04-01 06:46:24,628 INFO L78 Accepts]: Start accepts. Automaton has 9746 states and 14999 transitions. Word has length 134 [2023-04-01 06:46:24,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:46:24,628 INFO L495 AbstractCegarLoop]: Abstraction has 9746 states and 14999 transitions. [2023-04-01 06:46:24,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:46:24,629 INFO L276 IsEmpty]: Start isEmpty. Operand 9746 states and 14999 transitions. [2023-04-01 06:46:24,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2023-04-01 06:46:24,630 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:46:24,630 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:46:24,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-01 06:46:24,630 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:46:24,631 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:46:24,631 INFO L85 PathProgramCache]: Analyzing trace with hash -1851616994, now seen corresponding path program 1 times [2023-04-01 06:46:24,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:46:24,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700827629] [2023-04-01 06:46:24,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:46:24,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:46:24,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:46:25,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:46:25,101 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:46:25,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700827629] [2023-04-01 06:46:25,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700827629] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:46:25,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:46:25,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 06:46:25,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560261456] [2023-04-01 06:46:25,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:46:25,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 06:46:25,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:46:25,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 06:46:25,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 06:46:25,103 INFO L87 Difference]: Start difference. First operand 9746 states and 14999 transitions. Second operand has 5 states, 5 states have (on average 28.0) internal successors, (140), 5 states have internal predecessors, (140), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:46:26,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:46:26,581 INFO L93 Difference]: Finished difference Result 15596 states and 23769 transitions. [2023-04-01 06:46:26,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 06:46:26,582 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 28.0) internal successors, (140), 5 states have internal predecessors, (140), 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 [2023-04-01 06:46:26,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:46:26,628 INFO L225 Difference]: With dead ends: 15596 [2023-04-01 06:46:26,629 INFO L226 Difference]: Without dead ends: 15594 [2023-04-01 06:46:26,638 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 06:46:26,638 INFO L413 NwaCegarLoop]: 531 mSDtfsCounter, 309 mSDsluCounter, 1291 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 1822 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 [2023-04-01 06:46:26,639 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [309 Valid, 1822 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 06:46:26,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15594 states. [2023-04-01 06:46:27,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15594 to 9870. [2023-04-01 06:46:27,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9870 states, 9866 states have (on average 1.5251368335698359) internal successors, (15047), 9866 states have internal predecessors, (15047), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:46:27,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9870 states to 9870 states and 15050 transitions. [2023-04-01 06:46:27,708 INFO L78 Accepts]: Start accepts. Automaton has 9870 states and 15050 transitions. Word has length 143 [2023-04-01 06:46:27,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:46:27,709 INFO L495 AbstractCegarLoop]: Abstraction has 9870 states and 15050 transitions. [2023-04-01 06:46:27,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.0) internal successors, (140), 5 states have internal predecessors, (140), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:46:27,709 INFO L276 IsEmpty]: Start isEmpty. Operand 9870 states and 15050 transitions. [2023-04-01 06:46:27,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2023-04-01 06:46:27,711 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:46:27,711 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:46:27,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-04-01 06:46:27,712 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:46:27,712 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:46:27,712 INFO L85 PathProgramCache]: Analyzing trace with hash -1721222210, now seen corresponding path program 1 times [2023-04-01 06:46:27,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:46:27,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569006603] [2023-04-01 06:46:27,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:46:27,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:46:28,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:46:29,755 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 06:46:29,755 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:46:29,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569006603] [2023-04-01 06:46:29,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569006603] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 06:46:29,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244044261] [2023-04-01 06:46:29,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:46:29,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 06:46:29,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 06:46:29,759 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 06:46:29,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 06:46:30,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:46:30,113 INFO L262 TraceCheckSpWp]: Trace formula consists of 1394 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 06:46:30,123 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 06:46:30,397 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-01 06:46:30,398 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 06:46:30,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244044261] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:46:30,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 06:46:30,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [13] total 15 [2023-04-01 06:46:30,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613702066] [2023-04-01 06:46:30,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:46:30,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 06:46:30,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:46:30,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 06:46:30,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2023-04-01 06:46:30,400 INFO L87 Difference]: Start difference. First operand 9870 states and 15050 transitions. Second operand has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:46:32,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:46:32,757 INFO L93 Difference]: Finished difference Result 29119 states and 44368 transitions. [2023-04-01 06:46:32,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 06:46:32,758 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 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 155 [2023-04-01 06:46:32,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:46:32,817 INFO L225 Difference]: With dead ends: 29119 [2023-04-01 06:46:32,817 INFO L226 Difference]: Without dead ends: 19272 [2023-04-01 06:46:32,838 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2023-04-01 06:46:32,839 INFO L413 NwaCegarLoop]: 382 mSDtfsCounter, 1035 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1035 SdHoareTripleChecker+Valid, 745 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 [2023-04-01 06:46:32,839 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1035 Valid, 745 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 06:46:32,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19272 states. [2023-04-01 06:46:34,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19272 to 19270. [2023-04-01 06:46:34,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19270 states, 19266 states have (on average 1.5185300529430084) internal successors, (29256), 19266 states have internal predecessors, (29256), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:46:34,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19270 states to 19270 states and 29259 transitions. [2023-04-01 06:46:34,816 INFO L78 Accepts]: Start accepts. Automaton has 19270 states and 29259 transitions. Word has length 155 [2023-04-01 06:46:34,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:46:34,816 INFO L495 AbstractCegarLoop]: Abstraction has 19270 states and 29259 transitions. [2023-04-01 06:46:34,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:46:34,816 INFO L276 IsEmpty]: Start isEmpty. Operand 19270 states and 29259 transitions. [2023-04-01 06:46:34,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2023-04-01 06:46:34,819 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:46:34,819 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:46:34,834 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 06:46:35,035 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 [2023-04-01 06:46:35,035 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:46:35,036 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:46:35,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1163131292, now seen corresponding path program 1 times [2023-04-01 06:46:35,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:46:35,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874501464] [2023-04-01 06:46:35,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:46:35,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:46:35,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:46:35,167 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-01 06:46:35,167 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:46:35,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874501464] [2023-04-01 06:46:35,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874501464] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:46:35,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:46:35,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 06:46:35,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339931765] [2023-04-01 06:46:35,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:46:35,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:46:35,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:46:35,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:46:35,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:46:35,169 INFO L87 Difference]: Start difference. First operand 19270 states and 29259 transitions. Second operand has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:46:37,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:46:37,860 INFO L93 Difference]: Finished difference Result 44445 states and 67684 transitions. [2023-04-01 06:46:37,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 06:46:37,861 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 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 156 [2023-04-01 06:46:37,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:46:37,962 INFO L225 Difference]: With dead ends: 44445 [2023-04-01 06:46:37,963 INFO L226 Difference]: Without dead ends: 25563 [2023-04-01 06:46:37,996 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:46:37,997 INFO L413 NwaCegarLoop]: 390 mSDtfsCounter, 150 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 742 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 [2023-04-01 06:46:37,998 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 742 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 06:46:38,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25563 states. [2023-04-01 06:46:40,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25563 to 25561. [2023-04-01 06:46:40,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25561 states, 25557 states have (on average 1.5073365418476348) internal successors, (38523), 25557 states have internal predecessors, (38523), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:46:40,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25561 states to 25561 states and 38526 transitions. [2023-04-01 06:46:40,791 INFO L78 Accepts]: Start accepts. Automaton has 25561 states and 38526 transitions. Word has length 156 [2023-04-01 06:46:40,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:46:40,791 INFO L495 AbstractCegarLoop]: Abstraction has 25561 states and 38526 transitions. [2023-04-01 06:46:40,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:46:40,792 INFO L276 IsEmpty]: Start isEmpty. Operand 25561 states and 38526 transitions. [2023-04-01 06:46:40,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2023-04-01 06:46:40,799 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:46:40,799 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:46:40,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-04-01 06:46:40,800 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:46:40,800 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:46:40,800 INFO L85 PathProgramCache]: Analyzing trace with hash 80426604, now seen corresponding path program 1 times [2023-04-01 06:46:40,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:46:40,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659882605] [2023-04-01 06:46:40,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:46:40,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:46:40,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:46:40,932 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-01 06:46:40,932 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:46:40,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659882605] [2023-04-01 06:46:40,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659882605] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:46:40,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:46:40,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 06:46:40,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60007991] [2023-04-01 06:46:40,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:46:40,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:46:40,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:46:40,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:46:40,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:46:40,935 INFO L87 Difference]: Start difference. First operand 25561 states and 38526 transitions. Second operand has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:46:45,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:46:45,668 INFO L93 Difference]: Finished difference Result 75049 states and 112974 transitions. [2023-04-01 06:46:45,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 06:46:45,669 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 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 157 [2023-04-01 06:46:45,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:46:45,834 INFO L225 Difference]: With dead ends: 75049 [2023-04-01 06:46:45,834 INFO L226 Difference]: Without dead ends: 49607 [2023-04-01 06:46:45,892 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:46:45,893 INFO L413 NwaCegarLoop]: 707 mSDtfsCounter, 268 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 1069 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 06:46:45,893 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [268 Valid, 1069 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 06:46:46,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49607 states. [2023-04-01 06:46:51,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49607 to 49605. [2023-04-01 06:46:51,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49605 states, 49601 states have (on average 1.4986794621076187) internal successors, (74336), 49601 states have internal predecessors, (74336), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:46:51,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49605 states to 49605 states and 74339 transitions. [2023-04-01 06:46:51,207 INFO L78 Accepts]: Start accepts. Automaton has 49605 states and 74339 transitions. Word has length 157 [2023-04-01 06:46:51,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:46:51,207 INFO L495 AbstractCegarLoop]: Abstraction has 49605 states and 74339 transitions. [2023-04-01 06:46:51,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:46:51,208 INFO L276 IsEmpty]: Start isEmpty. Operand 49605 states and 74339 transitions. [2023-04-01 06:46:51,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2023-04-01 06:46:51,212 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:46:51,212 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:46:51,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-04-01 06:46:51,212 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:46:51,213 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:46:51,213 INFO L85 PathProgramCache]: Analyzing trace with hash -1854971750, now seen corresponding path program 1 times [2023-04-01 06:46:51,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:46:51,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217490544] [2023-04-01 06:46:51,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:46:51,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:46:51,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:46:51,303 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 06:46:51,303 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:46:51,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217490544] [2023-04-01 06:46:51,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217490544] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:46:51,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:46:51,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 06:46:51,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261254067] [2023-04-01 06:46:51,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:46:51,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:46:51,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:46:51,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:46:51,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:46:51,307 INFO L87 Difference]: Start difference. First operand 49605 states and 74339 transitions. Second operand has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 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)