/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/pals_floodmax.3.3.ufo.UNBOUNDED.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 06:14:15,395 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 06:14:15,396 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 06:14:15,426 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 06:14:15,426 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 06:14:15,427 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 06:14:15,428 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 06:14:15,428 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 06:14:15,429 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 06:14:15,430 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 06:14:15,430 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 06:14:15,431 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 06:14:15,431 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 06:14:15,432 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 06:14:15,433 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 06:14:15,433 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 06:14:15,434 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 06:14:15,434 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 06:14:15,435 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 06:14:15,436 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 06:14:15,437 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 06:14:15,438 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 06:14:15,440 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 06:14:15,441 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 06:14:15,443 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 06:14:15,443 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 06:14:15,443 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 06:14:15,443 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 06:14:15,444 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 06:14:15,444 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 06:14:15,444 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 06:14:15,445 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 06:14:15,445 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 06:14:15,446 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 06:14:15,446 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 06:14:15,446 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 06:14:15,447 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 06:14:15,447 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 06:14:15,447 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 06:14:15,448 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 06:14:15,448 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 06:14:15,449 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 06:14:15,461 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 06:14:15,461 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 06:14:15,462 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 06:14:15,462 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 06:14:15,462 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 06:14:15,462 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 06:14:15,462 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 06:14:15,463 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 06:14:15,463 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 06:14:15,463 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 06:14:15,463 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 06:14:15,463 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 06:14:15,463 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 06:14:15,463 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 06:14:15,463 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 06:14:15,463 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 06:14:15,463 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 06:14:15,463 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 06:14:15,464 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 06:14:15,464 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 06:14:15,464 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 06:14:15,464 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 06:14:15,464 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 06:14:15,464 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 06:14:15,464 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 06:14:15,464 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 06:14:15,464 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 06:14:15,465 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 06:14:15,465 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 06:14:15,465 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 06:14:15,465 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 06:14:15,465 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 06:14:15,465 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 06:14:15,465 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 06:14:15,465 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 06:14:15,465 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 06:14:15,465 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 06:14:15,465 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 06:14:15,465 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 06:14:15,466 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 06:14:15,466 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 06:14:15,466 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 06:14:15,621 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 06:14:15,655 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 06:14:15,657 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 06:14:15,657 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 06:14:15,660 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 06:14:15,661 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_floodmax.3.3.ufo.UNBOUNDED.pals.c [2023-04-01 06:14:16,782 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 06:14:16,918 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 06:14:16,918 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_floodmax.3.3.ufo.UNBOUNDED.pals.c [2023-04-01 06:14:16,924 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b1f950c10/a308845c34ea41b1837f984d39da0e08/FLAG7bcc4e997 [2023-04-01 06:14:16,933 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b1f950c10/a308845c34ea41b1837f984d39da0e08 [2023-04-01 06:14:16,935 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 06:14:16,936 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 06:14:16,936 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 06:14:16,936 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 06:14:16,939 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 06:14:16,939 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 06:14:16" (1/1) ... [2023-04-01 06:14:16,940 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d77e1c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:14:16, skipping insertion in model container [2023-04-01 06:14:16,940 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 06:14:16" (1/1) ... [2023-04-01 06:14:16,944 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 06:14:16,977 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 06:14:17,145 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/pals_floodmax.3.3.ufo.UNBOUNDED.pals.c[12968,12981] [2023-04-01 06:14:17,148 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 06:14:17,163 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 06:14:17,197 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/pals_floodmax.3.3.ufo.UNBOUNDED.pals.c[12968,12981] [2023-04-01 06:14:17,197 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 06:14:17,207 INFO L208 MainTranslator]: Completed translation [2023-04-01 06:14:17,207 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:14:17 WrapperNode [2023-04-01 06:14:17,208 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 06:14:17,208 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 06:14:17,208 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 06:14:17,209 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 06:14:17,218 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:14:17" (1/1) ... [2023-04-01 06:14:17,218 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:14:17" (1/1) ... [2023-04-01 06:14:17,262 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:14:17" (1/1) ... [2023-04-01 06:14:17,262 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:14:17" (1/1) ... [2023-04-01 06:14:17,271 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:14:17" (1/1) ... [2023-04-01 06:14:17,290 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:14:17" (1/1) ... [2023-04-01 06:14:17,292 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:14:17" (1/1) ... [2023-04-01 06:14:17,293 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:14:17" (1/1) ... [2023-04-01 06:14:17,296 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 06:14:17,321 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 06:14:17,321 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 06:14:17,321 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 06:14:17,322 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:14:17" (1/1) ... [2023-04-01 06:14:17,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 06:14:17,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 06:14:17,349 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 06:14:17,353 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 06:14:17,372 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 06:14:17,376 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 06:14:17,376 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 06:14:17,376 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 06:14:17,376 INFO L138 BoogieDeclarations]: Found implementation of procedure node1 [2023-04-01 06:14:17,376 INFO L138 BoogieDeclarations]: Found implementation of procedure node2 [2023-04-01 06:14:17,377 INFO L138 BoogieDeclarations]: Found implementation of procedure node3 [2023-04-01 06:14:17,377 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2023-04-01 06:14:17,377 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2023-04-01 06:14:17,377 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 06:14:17,377 INFO L138 BoogieDeclarations]: Found implementation of procedure assert [2023-04-01 06:14:17,377 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 06:14:17,377 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 06:14:17,377 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 06:14:17,377 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 06:14:17,377 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-01 06:14:17,377 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2023-04-01 06:14:17,378 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-01 06:14:17,378 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-01 06:14:17,378 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 06:14:17,378 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-01 06:14:17,378 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-01 06:14:17,378 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-01 06:14:17,378 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-01 06:14:17,378 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-01 06:14:17,378 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-01 06:14:17,378 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-01 06:14:17,378 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 06:14:17,378 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 06:14:17,378 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 06:14:17,379 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 06:14:17,379 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 06:14:17,379 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 06:14:17,379 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 06:14:17,446 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 06:14:17,447 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 06:14:17,827 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 06:14:18,213 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 06:14:18,213 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 06:14:18,215 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 06:14:18 BoogieIcfgContainer [2023-04-01 06:14:18,215 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 06:14:18,217 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 06:14:18,217 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 06:14:18,219 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 06:14:18,219 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 06:14:16" (1/3) ... [2023-04-01 06:14:18,219 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fadd60f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 06:14:18, skipping insertion in model container [2023-04-01 06:14:18,219 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:14:17" (2/3) ... [2023-04-01 06:14:18,220 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fadd60f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 06:14:18, skipping insertion in model container [2023-04-01 06:14:18,220 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 06:14:18" (3/3) ... [2023-04-01 06:14:18,221 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.3.ufo.UNBOUNDED.pals.c [2023-04-01 06:14:18,232 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 06:14:18,233 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 06:14:18,270 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 06:14:18,274 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;@5575dda8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 06:14:18,275 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 06:14:18,278 INFO L276 IsEmpty]: Start isEmpty. Operand has 50 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 32 states have internal predecessors, (43), 9 states have call successors, (9), 9 states have call predecessors, (9), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-04-01 06:14:18,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-04-01 06:14:18,285 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:14:18,286 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] [2023-04-01 06:14:18,287 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:14:18,292 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:14:18,292 INFO L85 PathProgramCache]: Analyzing trace with hash -2069377630, now seen corresponding path program 1 times [2023-04-01 06:14:18,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:14:18,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827017594] [2023-04-01 06:14:18,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:14:18,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:14:18,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:14:20,935 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 06:14:20,936 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:14:20,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827017594] [2023-04-01 06:14:20,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827017594] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:14:20,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:14:20,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2023-04-01 06:14:20,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542083505] [2023-04-01 06:14:20,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:14:20,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-04-01 06:14:20,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:14:20,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-04-01 06:14:20,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2023-04-01 06:14:20,974 INFO L87 Difference]: Start difference. First operand has 50 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 32 states have internal predecessors, (43), 9 states have call successors, (9), 9 states have call predecessors, (9), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 17 states, 9 states have (on average 2.0) internal successors, (18), 11 states have internal predecessors, (18), 7 states have call successors, (9), 5 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2023-04-01 06:14:21,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:14:21,698 INFO L93 Difference]: Finished difference Result 134 states and 178 transitions. [2023-04-01 06:14:21,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-04-01 06:14:21,700 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 9 states have (on average 2.0) internal successors, (18), 11 states have internal predecessors, (18), 7 states have call successors, (9), 5 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) Word has length 34 [2023-04-01 06:14:21,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:14:21,706 INFO L225 Difference]: With dead ends: 134 [2023-04-01 06:14:21,706 INFO L226 Difference]: Without dead ends: 97 [2023-04-01 06:14:21,708 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=216, Invalid=714, Unknown=0, NotChecked=0, Total=930 [2023-04-01 06:14:21,710 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 281 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 623 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 06:14:21,711 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [285 Valid, 137 Invalid, 680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 623 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 06:14:21,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2023-04-01 06:14:21,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 73. [2023-04-01 06:14:21,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 47 states have (on average 1.425531914893617) internal successors, (67), 48 states have internal predecessors, (67), 13 states have call successors, (13), 13 states have call predecessors, (13), 12 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2023-04-01 06:14:21,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 92 transitions. [2023-04-01 06:14:21,757 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 92 transitions. Word has length 34 [2023-04-01 06:14:21,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:14:21,757 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 92 transitions. [2023-04-01 06:14:21,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 9 states have (on average 2.0) internal successors, (18), 11 states have internal predecessors, (18), 7 states have call successors, (9), 5 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2023-04-01 06:14:21,758 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 92 transitions. [2023-04-01 06:14:21,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-04-01 06:14:21,759 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:14:21,759 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] [2023-04-01 06:14:21,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 06:14:21,760 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:14:21,760 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:14:21,760 INFO L85 PathProgramCache]: Analyzing trace with hash -401666627, now seen corresponding path program 1 times [2023-04-01 06:14:21,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:14:21,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912497674] [2023-04-01 06:14:21,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:14:21,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:14:21,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:14:22,770 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 06:14:22,771 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:14:22,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912497674] [2023-04-01 06:14:22,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912497674] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:14:22,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:14:22,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-01 06:14:22,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562412410] [2023-04-01 06:14:22,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:14:22,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 06:14:22,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:14:22,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 06:14:22,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2023-04-01 06:14:22,776 INFO L87 Difference]: Start difference. First operand 73 states and 92 transitions. Second operand has 11 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 9 states have internal predecessors, (19), 5 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2023-04-01 06:14:23,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:14:23,123 INFO L93 Difference]: Finished difference Result 135 states and 166 transitions. [2023-04-01 06:14:23,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 06:14:23,123 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 9 states have internal predecessors, (19), 5 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 35 [2023-04-01 06:14:23,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:14:23,124 INFO L225 Difference]: With dead ends: 135 [2023-04-01 06:14:23,124 INFO L226 Difference]: Without dead ends: 99 [2023-04-01 06:14:23,125 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2023-04-01 06:14:23,126 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 133 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 447 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 06:14:23,126 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 93 Invalid, 481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 447 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 06:14:23,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2023-04-01 06:14:23,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 73. [2023-04-01 06:14:23,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 47 states have (on average 1.4042553191489362) internal successors, (66), 48 states have internal predecessors, (66), 13 states have call successors, (13), 13 states have call predecessors, (13), 12 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2023-04-01 06:14:23,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 91 transitions. [2023-04-01 06:14:23,140 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 91 transitions. Word has length 35 [2023-04-01 06:14:23,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:14:23,140 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 91 transitions. [2023-04-01 06:14:23,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 9 states have internal predecessors, (19), 5 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2023-04-01 06:14:23,140 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 91 transitions. [2023-04-01 06:14:23,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-04-01 06:14:23,141 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:14:23,141 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] [2023-04-01 06:14:23,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 06:14:23,142 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:14:23,142 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:14:23,142 INFO L85 PathProgramCache]: Analyzing trace with hash 864478315, now seen corresponding path program 1 times [2023-04-01 06:14:23,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:14:23,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483451141] [2023-04-01 06:14:23,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:14:23,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:14:23,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:14:24,137 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 06:14:24,137 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:14:24,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483451141] [2023-04-01 06:14:24,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483451141] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:14:24,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:14:24,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-01 06:14:24,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352498009] [2023-04-01 06:14:24,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:14:24,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 06:14:24,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:14:24,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 06:14:24,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2023-04-01 06:14:24,141 INFO L87 Difference]: Start difference. First operand 73 states and 91 transitions. Second operand has 11 states, 7 states have (on average 2.857142857142857) internal successors, (20), 9 states have internal predecessors, (20), 5 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2023-04-01 06:14:24,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:14:24,463 INFO L93 Difference]: Finished difference Result 141 states and 171 transitions. [2023-04-01 06:14:24,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 06:14:24,463 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 2.857142857142857) internal successors, (20), 9 states have internal predecessors, (20), 5 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 36 [2023-04-01 06:14:24,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:14:24,464 INFO L225 Difference]: With dead ends: 141 [2023-04-01 06:14:24,464 INFO L226 Difference]: Without dead ends: 105 [2023-04-01 06:14:24,465 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2023-04-01 06:14:24,466 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 97 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 422 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 06:14:24,466 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 94 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 422 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 06:14:24,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2023-04-01 06:14:24,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 73. [2023-04-01 06:14:24,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 47 states have (on average 1.3829787234042554) internal successors, (65), 48 states have internal predecessors, (65), 13 states have call successors, (13), 13 states have call predecessors, (13), 12 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2023-04-01 06:14:24,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 90 transitions. [2023-04-01 06:14:24,477 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 90 transitions. Word has length 36 [2023-04-01 06:14:24,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:14:24,477 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 90 transitions. [2023-04-01 06:14:24,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 2.857142857142857) internal successors, (20), 9 states have internal predecessors, (20), 5 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2023-04-01 06:14:24,477 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 90 transitions. [2023-04-01 06:14:24,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-04-01 06:14:24,478 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:14:24,478 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] [2023-04-01 06:14:24,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 06:14:24,478 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:14:24,479 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:14:24,479 INFO L85 PathProgramCache]: Analyzing trace with hash -1727990042, now seen corresponding path program 1 times [2023-04-01 06:14:24,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:14:24,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858364830] [2023-04-01 06:14:24,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:14:24,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:14:24,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:14:25,407 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 06:14:25,408 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:14:25,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858364830] [2023-04-01 06:14:25,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858364830] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:14:25,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:14:25,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-01 06:14:25,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275404901] [2023-04-01 06:14:25,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:14:25,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 06:14:25,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:14:25,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 06:14:25,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2023-04-01 06:14:25,409 INFO L87 Difference]: Start difference. First operand 73 states and 90 transitions. Second operand has 11 states, 7 states have (on average 3.0) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2023-04-01 06:14:25,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:14:25,739 INFO L93 Difference]: Finished difference Result 147 states and 176 transitions. [2023-04-01 06:14:25,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 06:14:25,739 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 3.0) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 37 [2023-04-01 06:14:25,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:14:25,741 INFO L225 Difference]: With dead ends: 147 [2023-04-01 06:14:25,741 INFO L226 Difference]: Without dead ends: 111 [2023-04-01 06:14:25,741 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2023-04-01 06:14:25,742 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 104 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 442 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 06:14:25,742 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 96 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 442 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 06:14:25,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2023-04-01 06:14:25,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 73. [2023-04-01 06:14:25,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 47 states have (on average 1.3617021276595744) internal successors, (64), 48 states have internal predecessors, (64), 13 states have call successors, (13), 13 states have call predecessors, (13), 12 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2023-04-01 06:14:25,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 89 transitions. [2023-04-01 06:14:25,753 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 89 transitions. Word has length 37 [2023-04-01 06:14:25,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:14:25,753 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 89 transitions. [2023-04-01 06:14:25,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 3.0) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2023-04-01 06:14:25,753 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 89 transitions. [2023-04-01 06:14:25,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-04-01 06:14:25,754 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:14:25,754 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] [2023-04-01 06:14:25,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 06:14:25,754 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:14:25,754 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:14:25,754 INFO L85 PathProgramCache]: Analyzing trace with hash -1290897234, now seen corresponding path program 1 times [2023-04-01 06:14:25,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:14:25,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310524170] [2023-04-01 06:14:25,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:14:25,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:14:25,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:14:27,137 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 06:14:27,137 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:14:27,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310524170] [2023-04-01 06:14:27,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310524170] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:14:27,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:14:27,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2023-04-01 06:14:27,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839413085] [2023-04-01 06:14:27,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:14:27,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-04-01 06:14:27,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:14:27,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-04-01 06:14:27,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2023-04-01 06:14:27,139 INFO L87 Difference]: Start difference. First operand 73 states and 89 transitions. Second operand has 18 states, 10 states have (on average 2.3) internal successors, (23), 12 states have internal predecessors, (23), 7 states have call successors, (9), 5 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2023-04-01 06:14:27,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:14:27,972 INFO L93 Difference]: Finished difference Result 213 states and 265 transitions. [2023-04-01 06:14:27,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-04-01 06:14:27,973 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 10 states have (on average 2.3) internal successors, (23), 12 states have internal predecessors, (23), 7 states have call successors, (9), 5 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) Word has length 39 [2023-04-01 06:14:27,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:14:27,975 INFO L225 Difference]: With dead ends: 213 [2023-04-01 06:14:27,975 INFO L226 Difference]: Without dead ends: 173 [2023-04-01 06:14:27,976 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=320, Invalid=1086, Unknown=0, NotChecked=0, Total=1406 [2023-04-01 06:14:27,976 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 450 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 591 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 455 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 06:14:27,977 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [455 Valid, 143 Invalid, 759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 591 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 06:14:27,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2023-04-01 06:14:28,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 116. [2023-04-01 06:14:28,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 77 states have (on average 1.3116883116883118) internal successors, (101), 81 states have internal predecessors, (101), 18 states have call successors, (18), 18 states have call predecessors, (18), 20 states have return successors, (22), 16 states have call predecessors, (22), 17 states have call successors, (22) [2023-04-01 06:14:28,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 141 transitions. [2023-04-01 06:14:28,005 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 141 transitions. Word has length 39 [2023-04-01 06:14:28,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:14:28,005 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 141 transitions. [2023-04-01 06:14:28,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 10 states have (on average 2.3) internal successors, (23), 12 states have internal predecessors, (23), 7 states have call successors, (9), 5 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2023-04-01 06:14:28,005 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 141 transitions. [2023-04-01 06:14:28,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-04-01 06:14:28,010 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:14:28,010 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:14:28,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 06:14:28,012 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:14:28,012 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:14:28,012 INFO L85 PathProgramCache]: Analyzing trace with hash 79164578, now seen corresponding path program 1 times [2023-04-01 06:14:28,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:14:28,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076196034] [2023-04-01 06:14:28,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:14:28,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:14:28,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:14:28,952 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 06:14:28,952 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:14:28,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076196034] [2023-04-01 06:14:28,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076196034] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:14:28,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:14:28,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-01 06:14:28,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852194218] [2023-04-01 06:14:28,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:14:28,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 06:14:28,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:14:28,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 06:14:28,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-04-01 06:14:28,954 INFO L87 Difference]: Start difference. First operand 116 states and 141 transitions. Second operand has 11 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2023-04-01 06:14:29,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:14:29,455 INFO L93 Difference]: Finished difference Result 224 states and 279 transitions. [2023-04-01 06:14:29,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 06:14:29,455 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 40 [2023-04-01 06:14:29,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:14:29,458 INFO L225 Difference]: With dead ends: 224 [2023-04-01 06:14:29,458 INFO L226 Difference]: Without dead ends: 146 [2023-04-01 06:14:29,460 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2023-04-01 06:14:29,462 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 130 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 06:14:29,465 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 106 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 495 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 06:14:29,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2023-04-01 06:14:29,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 128. [2023-04-01 06:14:29,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 81 states have (on average 1.2469135802469136) internal successors, (101), 83 states have internal predecessors, (101), 23 states have call successors, (23), 23 states have call predecessors, (23), 23 states have return successors, (25), 21 states have call predecessors, (25), 22 states have call successors, (25) [2023-04-01 06:14:29,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 149 transitions. [2023-04-01 06:14:29,493 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 149 transitions. Word has length 40 [2023-04-01 06:14:29,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:14:29,494 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 149 transitions. [2023-04-01 06:14:29,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2023-04-01 06:14:29,494 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 149 transitions. [2023-04-01 06:14:29,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-04-01 06:14:29,494 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:14:29,494 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] [2023-04-01 06:14:29,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-01 06:14:29,494 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:14:29,495 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:14:29,495 INFO L85 PathProgramCache]: Analyzing trace with hash -910768472, now seen corresponding path program 1 times [2023-04-01 06:14:29,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:14:29,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783804050] [2023-04-01 06:14:29,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:14:29,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:14:29,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:14:30,707 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 06:14:30,707 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:14:30,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783804050] [2023-04-01 06:14:30,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783804050] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:14:30,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:14:30,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2023-04-01 06:14:30,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467491273] [2023-04-01 06:14:30,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:14:30,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-04-01 06:14:30,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:14:30,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-04-01 06:14:30,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2023-04-01 06:14:30,708 INFO L87 Difference]: Start difference. First operand 128 states and 149 transitions. Second operand has 17 states, 9 states have (on average 2.888888888888889) internal successors, (26), 11 states have internal predecessors, (26), 7 states have call successors, (9), 5 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2023-04-01 06:14:31,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:14:31,289 INFO L93 Difference]: Finished difference Result 246 states and 289 transitions. [2023-04-01 06:14:31,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-04-01 06:14:31,290 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 9 states have (on average 2.888888888888889) internal successors, (26), 11 states have internal predecessors, (26), 7 states have call successors, (9), 5 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) Word has length 42 [2023-04-01 06:14:31,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:14:31,291 INFO L225 Difference]: With dead ends: 246 [2023-04-01 06:14:31,291 INFO L226 Difference]: Without dead ends: 154 [2023-04-01 06:14:31,291 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=221, Invalid=709, Unknown=0, NotChecked=0, Total=930 [2023-04-01 06:14:31,292 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 243 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 537 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 06:14:31,292 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [246 Valid, 119 Invalid, 611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 537 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 06:14:31,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2023-04-01 06:14:31,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 128. [2023-04-01 06:14:31,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 81 states have (on average 1.2345679012345678) internal successors, (100), 83 states have internal predecessors, (100), 23 states have call successors, (23), 23 states have call predecessors, (23), 23 states have return successors, (25), 21 states have call predecessors, (25), 22 states have call successors, (25) [2023-04-01 06:14:31,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 148 transitions. [2023-04-01 06:14:31,311 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 148 transitions. Word has length 42 [2023-04-01 06:14:31,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:14:31,311 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 148 transitions. [2023-04-01 06:14:31,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 9 states have (on average 2.888888888888889) internal successors, (26), 11 states have internal predecessors, (26), 7 states have call successors, (9), 5 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2023-04-01 06:14:31,312 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 148 transitions. [2023-04-01 06:14:31,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-04-01 06:14:31,312 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:14:31,312 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:14:31,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-01 06:14:31,312 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:14:31,312 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:14:31,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1363052037, now seen corresponding path program 1 times [2023-04-01 06:14:31,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:14:31,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277557035] [2023-04-01 06:14:31,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:14:31,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:14:31,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:14:31,989 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 06:14:31,990 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:14:31,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277557035] [2023-04-01 06:14:31,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277557035] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:14:31,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:14:31,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-04-01 06:14:31,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376009397] [2023-04-01 06:14:31,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:14:31,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-01 06:14:31,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:14:31,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-01 06:14:31,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2023-04-01 06:14:31,992 INFO L87 Difference]: Start difference. First operand 128 states and 148 transitions. Second operand has 13 states, 8 states have (on average 3.375) internal successors, (27), 10 states have internal predecessors, (27), 3 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 06:14:32,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:14:32,243 INFO L93 Difference]: Finished difference Result 161 states and 189 transitions. [2023-04-01 06:14:32,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-04-01 06:14:32,244 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 8 states have (on average 3.375) internal successors, (27), 10 states have internal predecessors, (27), 3 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 43 [2023-04-01 06:14:32,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:14:32,244 INFO L225 Difference]: With dead ends: 161 [2023-04-01 06:14:32,244 INFO L226 Difference]: Without dead ends: 159 [2023-04-01 06:14:32,245 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2023-04-01 06:14:32,245 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 36 mSDsluCounter, 550 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 607 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 06:14:32,245 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 607 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 06:14:32,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2023-04-01 06:14:32,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 136. [2023-04-01 06:14:32,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 86 states have (on average 1.2209302325581395) internal successors, (105), 89 states have internal predecessors, (105), 24 states have call successors, (24), 24 states have call predecessors, (24), 25 states have return successors, (27), 22 states have call predecessors, (27), 23 states have call successors, (27) [2023-04-01 06:14:32,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 156 transitions. [2023-04-01 06:14:32,268 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 156 transitions. Word has length 43 [2023-04-01 06:14:32,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:14:32,268 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 156 transitions. [2023-04-01 06:14:32,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 8 states have (on average 3.375) internal successors, (27), 10 states have internal predecessors, (27), 3 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 06:14:32,268 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 156 transitions. [2023-04-01 06:14:32,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-04-01 06:14:32,269 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:14:32,269 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-04-01 06:14:32,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-01 06:14:32,269 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:14:32,269 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:14:32,269 INFO L85 PathProgramCache]: Analyzing trace with hash 1249132814, now seen corresponding path program 1 times [2023-04-01 06:14:32,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:14:32,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806170131] [2023-04-01 06:14:32,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:14:32,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:14:32,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:14:35,254 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 06:14:35,254 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:14:35,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806170131] [2023-04-01 06:14:35,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806170131] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 06:14:35,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803211782] [2023-04-01 06:14:35,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:14:35,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 06:14:35,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 06:14:35,267 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 06:14:35,270 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 06:14:35,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:14:35,500 INFO L262 TraceCheckSpWp]: Trace formula consists of 941 conjuncts, 88 conjunts are in the unsatisfiable core [2023-04-01 06:14:35,513 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 06:14:44,469 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:14:44,469 INFO L327 TraceCheckSpWp]: Computing backward predicates...