/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain IntervalDomain -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.ufo.BOUNDED-8.pals.c.p+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 00:25:16,724 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 00:25:16,725 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 00:25:16,750 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 00:25:16,751 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 00:25:16,752 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 00:25:16,755 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 00:25:16,757 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 00:25:16,759 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 00:25:16,762 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 00:25:16,763 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 00:25:16,764 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 00:25:16,764 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 00:25:16,764 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 00:25:16,765 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 00:25:16,765 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 00:25:16,766 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 00:25:16,766 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 00:25:16,767 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 00:25:16,768 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 00:25:16,769 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 00:25:16,771 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 00:25:16,773 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 00:25:16,774 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 00:25:16,784 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 00:25:16,784 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 00:25:16,784 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 00:25:16,785 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 00:25:16,786 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 00:25:16,786 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 00:25:16,787 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 00:25:16,787 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 00:25:16,788 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 00:25:16,788 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 00:25:16,789 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 00:25:16,789 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 00:25:16,789 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 00:25:16,790 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 00:25:16,790 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 00:25:16,790 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 00:25:16,791 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 00:25:16,792 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 00:25:16,821 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 00:25:16,821 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 00:25:16,821 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 00:25:16,822 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 00:25:16,822 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 00:25:16,822 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 00:25:16,822 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 00:25:16,822 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 00:25:16,823 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 00:25:16,823 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 00:25:16,823 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 00:25:16,823 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 00:25:16,823 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 00:25:16,823 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 00:25:16,824 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 00:25:16,824 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 00:25:16,824 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 00:25:16,824 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 00:25:16,824 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 00:25:16,824 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 00:25:16,824 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 00:25:16,824 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 00:25:16,825 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 00:25:16,825 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 00:25:16,825 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 00:25:16,825 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 00:25:16,825 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 00:25:16,825 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 00:25:16,825 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 00:25:16,825 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 00:25:16,826 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 00:25:16,826 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 00:25:16,826 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 00:25:16,826 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 00:25:16,826 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 00:25:16,826 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 00:25:16,826 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 00:25:16,826 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 00:25:16,826 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 00:25:16,826 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 00:25:16,827 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 00:25:16,827 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-04-01 00:25:17,012 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 00:25:17,037 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 00:25:17,039 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 00:25:17,040 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 00:25:17,040 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 00:25:17,041 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.ufo.BOUNDED-8.pals.c.p+lhb-reducer.c [2023-04-01 00:25:18,104 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 00:25:18,357 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 00:25:18,357 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.ufo.BOUNDED-8.pals.c.p+lhb-reducer.c [2023-04-01 00:25:18,380 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b30a2dea7/0c1cc9d861064724a9dbd7c31dba438a/FLAG3d23e0308 [2023-04-01 00:25:18,391 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b30a2dea7/0c1cc9d861064724a9dbd7c31dba438a [2023-04-01 00:25:18,393 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 00:25:18,394 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 00:25:18,394 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 00:25:18,395 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 00:25:18,397 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 00:25:18,397 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:25:18" (1/1) ... [2023-04-01 00:25:18,398 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51f219ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:25:18, skipping insertion in model container [2023-04-01 00:25:18,398 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:25:18" (1/1) ... [2023-04-01 00:25:18,403 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 00:25:18,473 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 00:25:18,842 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.ufo.BOUNDED-8.pals.c.p+lhb-reducer.c[30249,30262] [2023-04-01 00:25:18,887 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.ufo.BOUNDED-8.pals.c.p+lhb-reducer.c[33700,33713] [2023-04-01 00:25:19,032 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 00:25:19,048 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 00:25:19,176 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.ufo.BOUNDED-8.pals.c.p+lhb-reducer.c[30249,30262] [2023-04-01 00:25:19,205 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.ufo.BOUNDED-8.pals.c.p+lhb-reducer.c[33700,33713] [2023-04-01 00:25:19,339 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 00:25:19,356 INFO L208 MainTranslator]: Completed translation [2023-04-01 00:25:19,357 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:25:19 WrapperNode [2023-04-01 00:25:19,357 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 00:25:19,358 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 00:25:19,358 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 00:25:19,358 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 00:25:19,367 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:25:19" (1/1) ... [2023-04-01 00:25:19,367 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:25:19" (1/1) ... [2023-04-01 00:25:19,394 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:25:19" (1/1) ... [2023-04-01 00:25:19,394 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:25:19" (1/1) ... [2023-04-01 00:25:19,461 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:25:19" (1/1) ... [2023-04-01 00:25:19,477 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:25:19" (1/1) ... [2023-04-01 00:25:19,483 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:25:19" (1/1) ... [2023-04-01 00:25:19,493 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:25:19" (1/1) ... [2023-04-01 00:25:19,503 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 00:25:19,504 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 00:25:19,504 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 00:25:19,504 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 00:25:19,505 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:25:19" (1/1) ... [2023-04-01 00:25:19,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 00:25:19,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 00:25:19,542 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 00:25:19,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 00:25:19,569 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 00:25:19,569 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 00:25:19,569 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 00:25:19,569 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 00:25:19,569 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 00:25:19,569 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 00:25:19,570 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 00:25:19,570 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 00:25:19,570 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 00:25:19,570 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-01 00:25:19,570 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-01 00:25:19,570 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-01 00:25:19,570 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 00:25:19,570 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-01 00:25:19,570 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-01 00:25:19,570 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-01 00:25:19,570 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-01 00:25:19,570 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-01 00:25:19,570 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2023-04-01 00:25:19,571 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-01 00:25:19,571 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-01 00:25:19,571 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 00:25:19,571 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 00:25:19,571 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 00:25:19,571 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 00:25:19,571 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 00:25:19,571 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 00:25:19,571 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 00:25:19,757 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 00:25:19,758 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 00:25:21,314 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 00:25:22,180 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 00:25:22,181 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-01 00:25:22,185 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:25:22 BoogieIcfgContainer [2023-04-01 00:25:22,185 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 00:25:22,187 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 00:25:22,187 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 00:25:22,189 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 00:25:22,190 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 12:25:18" (1/3) ... [2023-04-01 00:25:22,190 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54d4faf8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:25:22, skipping insertion in model container [2023-04-01 00:25:22,190 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:25:19" (2/3) ... [2023-04-01 00:25:22,190 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54d4faf8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:25:22, skipping insertion in model container [2023-04-01 00:25:22,190 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:25:22" (3/3) ... [2023-04-01 00:25:22,191 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_floodmax.4.ufo.BOUNDED-8.pals.c.p+lhb-reducer.c [2023-04-01 00:25:22,205 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 00:25:22,205 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-04-01 00:25:22,253 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 00:25:22,258 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;@bd686e7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 00:25:22,258 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-04-01 00:25:22,267 INFO L276 IsEmpty]: Start isEmpty. Operand has 883 states, 787 states have (on average 1.664548919949174) internal successors, (1310), 878 states have internal predecessors, (1310), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 00:25:22,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2023-04-01 00:25:22,289 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:25:22,290 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 00:25:22,291 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:25:22,297 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:25:22,297 INFO L85 PathProgramCache]: Analyzing trace with hash -1860052560, now seen corresponding path program 1 times [2023-04-01 00:25:22,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:25:22,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536278225] [2023-04-01 00:25:22,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:25:22,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:25:22,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:25:22,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:25:22,986 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:25:22,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536278225] [2023-04-01 00:25:22,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536278225] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:25:22,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:25:22,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 00:25:22,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73255100] [2023-04-01 00:25:22,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:25:22,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 00:25:22,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:25:23,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 00:25:23,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 00:25:23,015 INFO L87 Difference]: Start difference. First operand has 883 states, 787 states have (on average 1.664548919949174) internal successors, (1310), 878 states have internal predecessors, (1310), 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 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:25:23,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:25:23,330 INFO L93 Difference]: Finished difference Result 1563 states and 2351 transitions. [2023-04-01 00:25:23,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 00:25:23,332 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 111 [2023-04-01 00:25:23,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:25:23,348 INFO L225 Difference]: With dead ends: 1563 [2023-04-01 00:25:23,348 INFO L226 Difference]: Without dead ends: 790 [2023-04-01 00:25:23,355 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-01 00:25:23,360 INFO L413 NwaCegarLoop]: 1247 mSDtfsCounter, 150 mSDsluCounter, 2294 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 3541 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 00:25:23,361 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 3541 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 00:25:23,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 790 states. [2023-04-01 00:25:23,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 790 to 790. [2023-04-01 00:25:23,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 790 states, 785 states have (on average 1.5312101910828027) internal successors, (1202), 786 states have internal predecessors, (1202), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:25:23,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 790 states to 790 states and 1205 transitions. [2023-04-01 00:25:23,431 INFO L78 Accepts]: Start accepts. Automaton has 790 states and 1205 transitions. Word has length 111 [2023-04-01 00:25:23,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:25:23,432 INFO L495 AbstractCegarLoop]: Abstraction has 790 states and 1205 transitions. [2023-04-01 00:25:23,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:25:23,432 INFO L276 IsEmpty]: Start isEmpty. Operand 790 states and 1205 transitions. [2023-04-01 00:25:23,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2023-04-01 00:25:23,439 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:25:23,439 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 00:25:23,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 00:25:23,439 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:25:23,440 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:25:23,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1418836256, now seen corresponding path program 1 times [2023-04-01 00:25:23,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:25:23,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464169504] [2023-04-01 00:25:23,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:25:23,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:25:23,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:25:23,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:25:23,742 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:25:23,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464169504] [2023-04-01 00:25:23,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464169504] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:25:23,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:25:23,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 00:25:23,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735725900] [2023-04-01 00:25:23,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:25:23,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 00:25:23,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:25:23,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 00:25:23,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 00:25:23,749 INFO L87 Difference]: Start difference. First operand 790 states and 1205 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 00:25:23,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:25:23,949 INFO L93 Difference]: Finished difference Result 1821 states and 2801 transitions. [2023-04-01 00:25:23,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 00:25:23,951 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 152 [2023-04-01 00:25:23,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:25:23,960 INFO L225 Difference]: With dead ends: 1821 [2023-04-01 00:25:23,960 INFO L226 Difference]: Without dead ends: 1219 [2023-04-01 00:25:23,961 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 00:25:23,962 INFO L413 NwaCegarLoop]: 1146 mSDtfsCounter, 842 mSDsluCounter, 946 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 842 SdHoareTripleChecker+Valid, 2092 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 00:25:23,962 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [842 Valid, 2092 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 00:25:23,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1219 states. [2023-04-01 00:25:24,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1219 to 1215. [2023-04-01 00:25:24,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1215 states, 1210 states have (on average 1.5338842975206612) internal successors, (1856), 1211 states have internal predecessors, (1856), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:25:24,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1215 states to 1215 states and 1859 transitions. [2023-04-01 00:25:24,011 INFO L78 Accepts]: Start accepts. Automaton has 1215 states and 1859 transitions. Word has length 152 [2023-04-01 00:25:24,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:25:24,013 INFO L495 AbstractCegarLoop]: Abstraction has 1215 states and 1859 transitions. [2023-04-01 00:25:24,013 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 00:25:24,013 INFO L276 IsEmpty]: Start isEmpty. Operand 1215 states and 1859 transitions. [2023-04-01 00:25:24,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2023-04-01 00:25:24,016 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:25:24,016 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 00:25:24,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 00:25:24,016 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:25:24,017 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:25:24,017 INFO L85 PathProgramCache]: Analyzing trace with hash -1724996485, now seen corresponding path program 1 times [2023-04-01 00:25:24,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:25:24,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524823924] [2023-04-01 00:25:24,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:25:24,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:25:24,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:25:24,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:25:24,247 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:25:24,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524823924] [2023-04-01 00:25:24,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524823924] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:25:24,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:25:24,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 00:25:24,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422918301] [2023-04-01 00:25:24,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:25:24,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 00:25:24,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:25:24,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 00:25:24,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 00:25:24,249 INFO L87 Difference]: Start difference. First operand 1215 states and 1859 transitions. Second operand has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:25:24,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:25:24,515 INFO L93 Difference]: Finished difference Result 2679 states and 4129 transitions. [2023-04-01 00:25:24,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 00:25:24,515 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 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 158 [2023-04-01 00:25:24,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:25:24,522 INFO L225 Difference]: With dead ends: 2679 [2023-04-01 00:25:24,522 INFO L226 Difference]: Without dead ends: 1651 [2023-04-01 00:25:24,525 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 00:25:24,528 INFO L413 NwaCegarLoop]: 1856 mSDtfsCounter, 922 mSDsluCounter, 901 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 922 SdHoareTripleChecker+Valid, 2757 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 00:25:24,529 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [922 Valid, 2757 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 00:25:24,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1651 states. [2023-04-01 00:25:24,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1651 to 1647. [2023-04-01 00:25:24,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1647 states, 1642 states have (on average 1.5261875761266748) internal successors, (2506), 1643 states have internal predecessors, (2506), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:25:24,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1647 states to 1647 states and 2509 transitions. [2023-04-01 00:25:24,571 INFO L78 Accepts]: Start accepts. Automaton has 1647 states and 2509 transitions. Word has length 158 [2023-04-01 00:25:24,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:25:24,572 INFO L495 AbstractCegarLoop]: Abstraction has 1647 states and 2509 transitions. [2023-04-01 00:25:24,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:25:24,572 INFO L276 IsEmpty]: Start isEmpty. Operand 1647 states and 2509 transitions. [2023-04-01 00:25:24,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2023-04-01 00:25:24,574 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:25:24,575 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 00:25:24,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 00:25:24,575 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:25:24,577 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:25:24,577 INFO L85 PathProgramCache]: Analyzing trace with hash -1294139675, now seen corresponding path program 1 times [2023-04-01 00:25:24,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:25:24,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793734504] [2023-04-01 00:25:24,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:25:24,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:25:24,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:25:24,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:25:24,762 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:25:24,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793734504] [2023-04-01 00:25:24,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793734504] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:25:24,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:25:24,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 00:25:24,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441676476] [2023-04-01 00:25:24,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:25:24,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 00:25:24,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:25:24,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 00:25:24,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 00:25:24,763 INFO L87 Difference]: Start difference. First operand 1647 states and 2509 transitions. Second operand has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:25:25,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:25:25,039 INFO L93 Difference]: Finished difference Result 4169 states and 6365 transitions. [2023-04-01 00:25:25,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 00:25:25,040 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 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 161 [2023-04-01 00:25:25,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:25:25,049 INFO L225 Difference]: With dead ends: 4169 [2023-04-01 00:25:25,049 INFO L226 Difference]: Without dead ends: 2728 [2023-04-01 00:25:25,053 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 00:25:25,056 INFO L413 NwaCegarLoop]: 1140 mSDtfsCounter, 834 mSDsluCounter, 914 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 834 SdHoareTripleChecker+Valid, 2054 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 00:25:25,057 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [834 Valid, 2054 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 00:25:25,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2728 states. [2023-04-01 00:25:25,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2728 to 2724. [2023-04-01 00:25:25,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2724 states, 2719 states have (on average 1.5200441338727473) internal successors, (4133), 2720 states have internal predecessors, (4133), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:25:25,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2724 states to 2724 states and 4136 transitions. [2023-04-01 00:25:25,212 INFO L78 Accepts]: Start accepts. Automaton has 2724 states and 4136 transitions. Word has length 161 [2023-04-01 00:25:25,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:25:25,213 INFO L495 AbstractCegarLoop]: Abstraction has 2724 states and 4136 transitions. [2023-04-01 00:25:25,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:25:25,214 INFO L276 IsEmpty]: Start isEmpty. Operand 2724 states and 4136 transitions. [2023-04-01 00:25:25,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2023-04-01 00:25:25,219 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:25:25,219 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 00:25:25,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 00:25:25,219 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:25:25,220 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:25:25,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1173445088, now seen corresponding path program 1 times [2023-04-01 00:25:25,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:25:25,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082469194] [2023-04-01 00:25:25,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:25:25,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:25:25,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:25:25,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:25:25,433 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:25:25,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082469194] [2023-04-01 00:25:25,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082469194] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:25:25,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:25:25,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 00:25:25,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864106904] [2023-04-01 00:25:25,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:25:25,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 00:25:25,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:25:25,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 00:25:25,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 00:25:25,439 INFO L87 Difference]: Start difference. First operand 2724 states and 4136 transitions. Second operand has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:25:25,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:25:25,768 INFO L93 Difference]: Finished difference Result 6437 states and 9810 transitions. [2023-04-01 00:25:25,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 00:25:25,769 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 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 167 [2023-04-01 00:25:25,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:25:25,783 INFO L225 Difference]: With dead ends: 6437 [2023-04-01 00:25:25,783 INFO L226 Difference]: Without dead ends: 3918 [2023-04-01 00:25:25,790 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 00:25:25,792 INFO L413 NwaCegarLoop]: 1878 mSDtfsCounter, 937 mSDsluCounter, 916 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 937 SdHoareTripleChecker+Valid, 2794 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 00:25:25,792 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [937 Valid, 2794 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 00:25:25,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3918 states. [2023-04-01 00:25:26,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3918 to 3914. [2023-04-01 00:25:26,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3914 states, 3909 states have (on average 1.5213609618828345) internal successors, (5947), 3910 states have internal predecessors, (5947), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:25:26,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3914 states to 3914 states and 5950 transitions. [2023-04-01 00:25:26,021 INFO L78 Accepts]: Start accepts. Automaton has 3914 states and 5950 transitions. Word has length 167 [2023-04-01 00:25:26,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:25:26,021 INFO L495 AbstractCegarLoop]: Abstraction has 3914 states and 5950 transitions. [2023-04-01 00:25:26,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:25:26,022 INFO L276 IsEmpty]: Start isEmpty. Operand 3914 states and 5950 transitions. [2023-04-01 00:25:26,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2023-04-01 00:25:26,026 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:25:26,027 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 00:25:26,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 00:25:26,027 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:25:26,027 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:25:26,027 INFO L85 PathProgramCache]: Analyzing trace with hash 166255440, now seen corresponding path program 1 times [2023-04-01 00:25:26,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:25:26,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103799870] [2023-04-01 00:25:26,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:25:26,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:25:26,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:25:26,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:25:26,188 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:25:26,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103799870] [2023-04-01 00:25:26,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103799870] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:25:26,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:25:26,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 00:25:26,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374532262] [2023-04-01 00:25:26,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:25:26,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 00:25:26,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:25:26,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 00:25:26,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 00:25:26,189 INFO L87 Difference]: Start difference. First operand 3914 states and 5950 transitions. Second operand has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:25:26,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:25:26,612 INFO L93 Difference]: Finished difference Result 10370 states and 15739 transitions. [2023-04-01 00:25:26,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 00:25:26,613 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 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 170 [2023-04-01 00:25:26,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:25:26,636 INFO L225 Difference]: With dead ends: 10370 [2023-04-01 00:25:26,637 INFO L226 Difference]: Without dead ends: 6680 [2023-04-01 00:25:26,647 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 00:25:26,648 INFO L413 NwaCegarLoop]: 1138 mSDtfsCounter, 826 mSDsluCounter, 886 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 826 SdHoareTripleChecker+Valid, 2024 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 00:25:26,648 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [826 Valid, 2024 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 00:25:26,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6680 states. [2023-04-01 00:25:26,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6680 to 6676. [2023-04-01 00:25:27,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6676 states, 6671 states have (on average 1.5084694948283615) internal successors, (10063), 6672 states have internal predecessors, (10063), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:25:27,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6676 states to 6676 states and 10066 transitions. [2023-04-01 00:25:27,025 INFO L78 Accepts]: Start accepts. Automaton has 6676 states and 10066 transitions. Word has length 170 [2023-04-01 00:25:27,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:25:27,026 INFO L495 AbstractCegarLoop]: Abstraction has 6676 states and 10066 transitions. [2023-04-01 00:25:27,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:25:27,026 INFO L276 IsEmpty]: Start isEmpty. Operand 6676 states and 10066 transitions. [2023-04-01 00:25:27,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2023-04-01 00:25:27,036 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:25:27,036 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 00:25:27,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-01 00:25:27,036 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:25:27,036 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:25:27,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1954852152, now seen corresponding path program 1 times [2023-04-01 00:25:27,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:25:27,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181233948] [2023-04-01 00:25:27,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:25:27,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:25:27,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:25:27,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:25:27,217 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:25:27,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181233948] [2023-04-01 00:25:27,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181233948] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:25:27,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:25:27,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 00:25:27,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586205321] [2023-04-01 00:25:27,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:25:27,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 00:25:27,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:25:27,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 00:25:27,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 00:25:27,219 INFO L87 Difference]: Start difference. First operand 6676 states and 10066 transitions. Second operand has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 3 states have internal predecessors, (173), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:25:27,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:25:27,794 INFO L93 Difference]: Finished difference Result 16337 states and 24698 transitions. [2023-04-01 00:25:27,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 00:25:27,795 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 3 states have internal predecessors, (173), 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 176 [2023-04-01 00:25:27,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:25:27,838 INFO L225 Difference]: With dead ends: 16337 [2023-04-01 00:25:27,838 INFO L226 Difference]: Without dead ends: 9884 [2023-04-01 00:25:27,855 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 00:25:27,856 INFO L413 NwaCegarLoop]: 1848 mSDtfsCounter, 928 mSDsluCounter, 889 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 928 SdHoareTripleChecker+Valid, 2737 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 00:25:27,856 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [928 Valid, 2737 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 00:25:27,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9884 states. [2023-04-01 00:25:28,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9884 to 9880. [2023-04-01 00:25:28,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9880 states, 9875 states have (on average 1.508860759493671) internal successors, (14900), 9876 states have internal predecessors, (14900), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:25:28,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9880 states to 9880 states and 14903 transitions. [2023-04-01 00:25:28,395 INFO L78 Accepts]: Start accepts. Automaton has 9880 states and 14903 transitions. Word has length 176 [2023-04-01 00:25:28,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:25:28,396 INFO L495 AbstractCegarLoop]: Abstraction has 9880 states and 14903 transitions. [2023-04-01 00:25:28,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 3 states have internal predecessors, (173), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:25:28,396 INFO L276 IsEmpty]: Start isEmpty. Operand 9880 states and 14903 transitions. [2023-04-01 00:25:28,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2023-04-01 00:25:28,407 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:25:28,408 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 00:25:28,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-01 00:25:28,408 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:25:28,408 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:25:28,408 INFO L85 PathProgramCache]: Analyzing trace with hash 550995694, now seen corresponding path program 1 times [2023-04-01 00:25:28,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:25:28,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302566011] [2023-04-01 00:25:28,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:25:28,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:25:28,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:25:28,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:25:28,556 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:25:28,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302566011] [2023-04-01 00:25:28,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302566011] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:25:28,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:25:28,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 00:25:28,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623124780] [2023-04-01 00:25:28,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:25:28,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 00:25:28,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:25:28,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 00:25:28,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 00:25:28,558 INFO L87 Difference]: Start difference. First operand 9880 states and 14903 transitions. Second operand has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:25:29,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:25:29,623 INFO L93 Difference]: Finished difference Result 26576 states and 39915 transitions. [2023-04-01 00:25:29,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 00:25:29,624 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 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 179 [2023-04-01 00:25:29,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:25:29,661 INFO L225 Difference]: With dead ends: 26576 [2023-04-01 00:25:29,662 INFO L226 Difference]: Without dead ends: 16938 [2023-04-01 00:25:29,684 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 00:25:29,685 INFO L413 NwaCegarLoop]: 1136 mSDtfsCounter, 818 mSDsluCounter, 858 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 818 SdHoareTripleChecker+Valid, 1994 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 00:25:29,685 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [818 Valid, 1994 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 00:25:29,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16938 states. [2023-04-01 00:25:30,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16938 to 16934. [2023-04-01 00:25:30,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16934 states, 16929 states have (on average 1.4899285250162444) internal successors, (25223), 16930 states have internal predecessors, (25223), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:25:30,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16934 states to 16934 states and 25226 transitions. [2023-04-01 00:25:30,671 INFO L78 Accepts]: Start accepts. Automaton has 16934 states and 25226 transitions. Word has length 179 [2023-04-01 00:25:30,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:25:30,672 INFO L495 AbstractCegarLoop]: Abstraction has 16934 states and 25226 transitions. [2023-04-01 00:25:30,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:25:30,672 INFO L276 IsEmpty]: Start isEmpty. Operand 16934 states and 25226 transitions. [2023-04-01 00:25:30,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2023-04-01 00:25:30,691 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:25:30,692 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 00:25:30,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-01 00:25:30,692 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:25:30,692 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:25:30,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1908597279, now seen corresponding path program 1 times [2023-04-01 00:25:30,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:25:30,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15994910] [2023-04-01 00:25:30,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:25:30,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:25:30,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:25:30,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:25:30,834 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:25:30,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15994910] [2023-04-01 00:25:30,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15994910] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:25:30,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:25:30,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 00:25:30,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191247437] [2023-04-01 00:25:30,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:25:30,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 00:25:30,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:25:30,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 00:25:30,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 00:25:30,836 INFO L87 Difference]: Start difference. First operand 16934 states and 25226 transitions. Second operand has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 3 states have internal predecessors, (182), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:25:32,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:25:32,241 INFO L93 Difference]: Finished difference Result 42145 states and 62938 transitions. [2023-04-01 00:25:32,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 00:25:32,242 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 3 states have internal predecessors, (182), 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 185 [2023-04-01 00:25:32,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:25:32,303 INFO L225 Difference]: With dead ends: 42145 [2023-04-01 00:25:32,303 INFO L226 Difference]: Without dead ends: 25452 [2023-04-01 00:25:32,335 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 00:25:32,335 INFO L413 NwaCegarLoop]: 1818 mSDtfsCounter, 919 mSDsluCounter, 862 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 919 SdHoareTripleChecker+Valid, 2680 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 00:25:32,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [919 Valid, 2680 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 00:25:32,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25452 states. [2023-04-01 00:25:33,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25452 to 25448. [2023-04-01 00:25:33,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25448 states, 25443 states have (on average 1.4901151593758597) internal successors, (37913), 25444 states have internal predecessors, (37913), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:25:33,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25448 states to 25448 states and 37916 transitions. [2023-04-01 00:25:33,777 INFO L78 Accepts]: Start accepts. Automaton has 25448 states and 37916 transitions. Word has length 185 [2023-04-01 00:25:33,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:25:33,777 INFO L495 AbstractCegarLoop]: Abstraction has 25448 states and 37916 transitions. [2023-04-01 00:25:33,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 3 states have internal predecessors, (182), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:25:33,778 INFO L276 IsEmpty]: Start isEmpty. Operand 25448 states and 37916 transitions. [2023-04-01 00:25:33,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2023-04-01 00:25:33,802 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:25:33,802 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 00:25:33,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-01 00:25:33,802 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:25:33,803 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:25:33,803 INFO L85 PathProgramCache]: Analyzing trace with hash 530135557, now seen corresponding path program 1 times [2023-04-01 00:25:33,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:25:33,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428147448] [2023-04-01 00:25:33,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:25:33,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:25:33,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:25:34,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:25:34,177 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:25:34,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428147448] [2023-04-01 00:25:34,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428147448] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:25:34,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:25:34,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 00:25:34,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462465405] [2023-04-01 00:25:34,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:25:34,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 00:25:34,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:25:34,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 00:25:34,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-01 00:25:34,179 INFO L87 Difference]: Start difference. First operand 25448 states and 37916 transitions. Second operand has 6 states, 6 states have (on average 30.833333333333332) internal successors, (185), 6 states have internal predecessors, (185), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:25:37,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:25:37,568 INFO L93 Difference]: Finished difference Result 64317 states and 95935 transitions. [2023-04-01 00:25:37,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 00:25:37,569 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 30.833333333333332) internal successors, (185), 6 states have internal predecessors, (185), 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 188 [2023-04-01 00:25:37,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:25:37,661 INFO L225 Difference]: With dead ends: 64317 [2023-04-01 00:25:37,661 INFO L226 Difference]: Without dead ends: 38845 [2023-04-01 00:25:37,700 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 00:25:37,701 INFO L413 NwaCegarLoop]: 5535 mSDtfsCounter, 3617 mSDsluCounter, 11181 mSDsCounter, 0 mSdLazyCounter, 1695 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3617 SdHoareTripleChecker+Valid, 16716 SdHoareTripleChecker+Invalid, 1725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1695 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-04-01 00:25:37,702 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3617 Valid, 16716 Invalid, 1725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1695 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-04-01 00:25:37,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38845 states. [2023-04-01 00:25:40,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38845 to 38602. [2023-04-01 00:25:40,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38602 states, 38597 states have (on average 1.4900899033603647) internal successors, (57513), 38598 states have internal predecessors, (57513), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:25:40,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38602 states to 38602 states and 57516 transitions. [2023-04-01 00:25:40,174 INFO L78 Accepts]: Start accepts. Automaton has 38602 states and 57516 transitions. Word has length 188 [2023-04-01 00:25:40,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:25:40,175 INFO L495 AbstractCegarLoop]: Abstraction has 38602 states and 57516 transitions. [2023-04-01 00:25:40,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 30.833333333333332) internal successors, (185), 6 states have internal predecessors, (185), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:25:40,175 INFO L276 IsEmpty]: Start isEmpty. Operand 38602 states and 57516 transitions. [2023-04-01 00:25:40,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2023-04-01 00:25:40,209 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:25:40,209 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 00:25:40,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-01 00:25:40,209 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:25:40,209 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:25:40,210 INFO L85 PathProgramCache]: Analyzing trace with hash -1060201009, now seen corresponding path program 1 times [2023-04-01 00:25:40,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:25:40,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500713715] [2023-04-01 00:25:40,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:25:40,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:25:40,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:25:40,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:25:40,386 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:25:40,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500713715] [2023-04-01 00:25:40,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500713715] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:25:40,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:25:40,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 00:25:40,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34875998] [2023-04-01 00:25:40,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:25:40,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 00:25:40,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:25:40,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 00:25:40,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 00:25:40,388 INFO L87 Difference]: Start difference. First operand 38602 states and 57516 transitions. Second operand has 4 states, 4 states have (on average 46.5) internal successors, (186), 4 states have internal predecessors, (186), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:25:42,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:25:42,907 INFO L93 Difference]: Finished difference Result 76954 states and 114671 transitions. [2023-04-01 00:25:42,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 00:25:42,908 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 46.5) internal successors, (186), 4 states have internal predecessors, (186), 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 189 [2023-04-01 00:25:42,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:25:43,040 INFO L225 Difference]: With dead ends: 76954 [2023-04-01 00:25:43,040 INFO L226 Difference]: Without dead ends: 38606 [2023-04-01 00:25:43,077 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-01 00:25:43,077 INFO L413 NwaCegarLoop]: 1840 mSDtfsCounter, 1793 mSDsluCounter, 1865 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1793 SdHoareTripleChecker+Valid, 3705 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 00:25:43,078 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1793 Valid, 3705 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 00:25:43,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38606 states. [2023-04-01 00:25:45,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38606 to 38567. [2023-04-01 00:25:45,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38567 states, 38562 states have (on average 1.485892847881334) internal successors, (57299), 38563 states have internal predecessors, (57299), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:25:45,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38567 states to 38567 states and 57302 transitions. [2023-04-01 00:25:45,435 INFO L78 Accepts]: Start accepts. Automaton has 38567 states and 57302 transitions. Word has length 189 [2023-04-01 00:25:45,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:25:45,435 INFO L495 AbstractCegarLoop]: Abstraction has 38567 states and 57302 transitions. [2023-04-01 00:25:45,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 46.5) internal successors, (186), 4 states have internal predecessors, (186), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:25:45,436 INFO L276 IsEmpty]: Start isEmpty. Operand 38567 states and 57302 transitions. [2023-04-01 00:25:45,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2023-04-01 00:25:45,464 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:25:45,464 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 00:25:45,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-04-01 00:25:45,464 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:25:45,465 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:25:45,465 INFO L85 PathProgramCache]: Analyzing trace with hash -515043212, now seen corresponding path program 1 times [2023-04-01 00:25:45,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:25:45,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277568731] [2023-04-01 00:25:45,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:25:45,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:25:45,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:25:46,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:25:46,035 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:25:46,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277568731] [2023-04-01 00:25:46,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277568731] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:25:46,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:25:46,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 00:25:46,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485369870] [2023-04-01 00:25:46,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:25:46,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 00:25:46,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:25:46,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 00:25:46,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-01 00:25:46,036 INFO L87 Difference]: Start difference. First operand 38567 states and 57302 transitions. Second operand has 4 states, 4 states have (on average 48.75) internal successors, (195), 4 states have internal predecessors, (195), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:25:49,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:25:49,604 INFO L93 Difference]: Finished difference Result 76431 states and 114008 transitions. [2023-04-01 00:25:49,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 00:25:49,605 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 48.75) internal successors, (195), 4 states have internal predecessors, (195), 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 198 [2023-04-01 00:25:49,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:25:49,719 INFO L225 Difference]: With dead ends: 76431 [2023-04-01 00:25:49,720 INFO L226 Difference]: Without dead ends: 53826 [2023-04-01 00:25:49,756 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-01 00:25:49,757 INFO L413 NwaCegarLoop]: 2289 mSDtfsCounter, 1729 mSDsluCounter, 1366 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1729 SdHoareTripleChecker+Valid, 3655 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 00:25:49,757 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1729 Valid, 3655 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 00:25:49,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53826 states. [2023-04-01 00:25:52,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53826 to 53658. [2023-04-01 00:25:52,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53658 states, 53653 states have (on average 1.4779788641828042) internal successors, (79298), 53654 states have internal predecessors, (79298), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:25:53,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53658 states to 53658 states and 79301 transitions. [2023-04-01 00:25:53,092 INFO L78 Accepts]: Start accepts. Automaton has 53658 states and 79301 transitions. Word has length 198 [2023-04-01 00:25:53,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:25:53,092 INFO L495 AbstractCegarLoop]: Abstraction has 53658 states and 79301 transitions. [2023-04-01 00:25:53,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 48.75) internal successors, (195), 4 states have internal predecessors, (195), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:25:53,092 INFO L276 IsEmpty]: Start isEmpty. Operand 53658 states and 79301 transitions. [2023-04-01 00:25:53,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2023-04-01 00:25:53,118 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:25:53,118 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 00:25:53,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-04-01 00:25:53,118 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:25:53,118 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:25:53,118 INFO L85 PathProgramCache]: Analyzing trace with hash 345976360, now seen corresponding path program 1 times [2023-04-01 00:25:53,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:25:53,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127311273] [2023-04-01 00:25:53,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:25:53,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:25:53,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:25:53,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:25:53,545 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:25:53,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127311273] [2023-04-01 00:25:53,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127311273] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:25:53,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:25:53,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 00:25:53,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254446996] [2023-04-01 00:25:53,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:25:53,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 00:25:53,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:25:53,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 00:25:53,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-01 00:25:53,547 INFO L87 Difference]: Start difference. First operand 53658 states and 79301 transitions. Second operand has 4 states, 4 states have (on average 49.5) internal successors, (198), 4 states have internal predecessors, (198), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:25:58,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:25:58,510 INFO L93 Difference]: Finished difference Result 108703 states and 160668 transitions. [2023-04-01 00:25:58,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 00:25:58,511 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 49.5) internal successors, (198), 4 states have internal predecessors, (198), 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 201 [2023-04-01 00:25:58,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:25:58,656 INFO L225 Difference]: With dead ends: 108703 [2023-04-01 00:25:58,656 INFO L226 Difference]: Without dead ends: 78170 [2023-04-01 00:25:58,692 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-01 00:25:58,693 INFO L413 NwaCegarLoop]: 2320 mSDtfsCounter, 1618 mSDsluCounter, 2032 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1618 SdHoareTripleChecker+Valid, 4352 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 00:25:58,693 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1618 Valid, 4352 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 00:25:58,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78170 states. [2023-04-01 00:26:03,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78170 to 78162. [2023-04-01 00:26:03,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78162 states, 78157 states have (on average 1.474340110290825) internal successors, (115230), 78158 states have internal predecessors, (115230), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:26:03,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78162 states to 78162 states and 115233 transitions. [2023-04-01 00:26:03,951 INFO L78 Accepts]: Start accepts. Automaton has 78162 states and 115233 transitions. Word has length 201 [2023-04-01 00:26:03,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:26:03,951 INFO L495 AbstractCegarLoop]: Abstraction has 78162 states and 115233 transitions. [2023-04-01 00:26:03,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 49.5) internal successors, (198), 4 states have internal predecessors, (198), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:26:03,951 INFO L276 IsEmpty]: Start isEmpty. Operand 78162 states and 115233 transitions. [2023-04-01 00:26:03,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2023-04-01 00:26:03,982 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:26:03,982 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 00:26:03,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-04-01 00:26:03,982 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:26:03,982 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:26:03,982 INFO L85 PathProgramCache]: Analyzing trace with hash -1688584690, now seen corresponding path program 1 times [2023-04-01 00:26:03,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:26:03,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064799606] [2023-04-01 00:26:03,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:26:03,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:26:04,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:26:04,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:26:04,528 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:26:04,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064799606] [2023-04-01 00:26:04,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064799606] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:26:04,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:26:04,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 00:26:04,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220418055] [2023-04-01 00:26:04,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:26:04,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 00:26:04,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:26:04,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 00:26:04,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-01 00:26:04,530 INFO L87 Difference]: Start difference. First operand 78162 states and 115233 transitions. Second operand has 4 states, 4 states have (on average 50.25) internal successors, (201), 4 states have internal predecessors, (201), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:26:12,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:26:12,117 INFO L93 Difference]: Finished difference Result 159478 states and 234727 transitions. [2023-04-01 00:26:12,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 00:26:12,118 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 50.25) internal successors, (201), 4 states have internal predecessors, (201), 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 204 [2023-04-01 00:26:12,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:26:12,374 INFO L225 Difference]: With dead ends: 159478 [2023-04-01 00:26:12,374 INFO L226 Difference]: Without dead ends: 114544 [2023-04-01 00:26:12,566 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-01 00:26:12,566 INFO L413 NwaCegarLoop]: 2206 mSDtfsCounter, 1741 mSDsluCounter, 1268 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1741 SdHoareTripleChecker+Valid, 3474 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 00:26:12,567 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1741 Valid, 3474 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 00:26:12,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114544 states.