/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 EqDomain -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 12:45:25,666 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 12:45:25,668 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 12:45:25,708 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 12:45:25,709 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 12:45:25,711 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 12:45:25,714 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 12:45:25,716 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 12:45:25,717 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 12:45:25,722 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 12:45:25,724 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 12:45:25,725 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 12:45:25,725 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 12:45:25,728 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 12:45:25,729 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 12:45:25,730 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 12:45:25,730 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 12:45:25,731 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 12:45:25,732 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 12:45:25,734 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 12:45:25,735 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 12:45:25,736 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 12:45:25,737 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 12:45:25,738 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 12:45:25,746 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 12:45:25,746 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 12:45:25,747 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 12:45:25,748 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 12:45:25,748 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 12:45:25,749 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 12:45:25,749 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 12:45:25,750 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 12:45:25,751 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 12:45:25,751 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 12:45:25,752 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 12:45:25,752 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 12:45:25,752 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 12:45:25,753 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 12:45:25,753 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 12:45:25,753 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 12:45:25,754 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 12:45:25,755 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 12:45:25,785 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 12:45:25,785 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 12:45:25,786 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 12:45:25,786 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 12:45:25,787 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 12:45:25,787 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 12:45:25,788 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 12:45:25,788 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 12:45:25,788 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 12:45:25,788 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 12:45:25,789 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 12:45:25,789 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 12:45:25,789 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 12:45:25,789 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 12:45:25,789 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 12:45:25,789 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 12:45:25,789 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 12:45:25,789 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 12:45:25,790 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 12:45:25,790 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 12:45:25,790 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 12:45:25,790 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 12:45:25,791 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 12:45:25,791 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 12:45:25,791 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 12:45:25,791 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 12:45:25,791 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 12:45:25,791 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 12:45:25,791 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 12:45:25,791 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 12:45:25,792 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 12:45:25,792 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 12:45:25,792 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 12:45:25,792 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 12:45:25,792 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 12:45:25,792 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 12:45:25,792 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 12:45:25,792 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 12:45:25,792 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 12:45:25,792 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 12:45:25,793 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 12:45:25,793 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 12:45:25,999 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 12:45:26,020 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 12:45:26,023 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 12:45:26,024 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 12:45:26,025 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 12:45:26,026 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-04-01 12:45:27,194 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 12:45:27,408 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 12:45:27,409 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-04-01 12:45:27,428 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4760a89e7/56427f4246164edf8fc69223abde9403/FLAG826c482b3 [2023-04-01 12:45:27,440 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4760a89e7/56427f4246164edf8fc69223abde9403 [2023-04-01 12:45:27,442 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 12:45:27,443 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 12:45:27,444 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 12:45:27,444 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 12:45:27,447 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 12:45:27,448 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:45:27" (1/1) ... [2023-04-01 12:45:27,449 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47c20abe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:45:27, skipping insertion in model container [2023-04-01 12:45:27,449 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:45:27" (1/1) ... [2023-04-01 12:45:27,455 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 12:45:27,484 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 12:45:27,729 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[5807,5820] [2023-04-01 12:45:27,748 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 12:45:27,765 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 12:45:27,796 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[5807,5820] [2023-04-01 12:45:27,808 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 12:45:27,824 INFO L208 MainTranslator]: Completed translation [2023-04-01 12:45:27,824 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:45:27 WrapperNode [2023-04-01 12:45:27,824 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 12:45:27,825 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 12:45:27,826 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 12:45:27,826 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 12:45:27,835 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:45:27" (1/1) ... [2023-04-01 12:45:27,835 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:45:27" (1/1) ... [2023-04-01 12:45:27,843 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:45:27" (1/1) ... [2023-04-01 12:45:27,844 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:45:27" (1/1) ... [2023-04-01 12:45:27,854 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:45:27" (1/1) ... [2023-04-01 12:45:27,859 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:45:27" (1/1) ... [2023-04-01 12:45:27,861 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:45:27" (1/1) ... [2023-04-01 12:45:27,863 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:45:27" (1/1) ... [2023-04-01 12:45:27,866 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 12:45:27,867 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 12:45:27,867 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 12:45:27,867 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 12:45:27,867 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:45:27" (1/1) ... [2023-04-01 12:45:27,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 12:45:27,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 12:45:27,896 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 12:45:27,904 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 12:45:27,935 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 12:45:27,935 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 12:45:27,935 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 12:45:27,935 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 12:45:27,935 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 12:45:27,935 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 12:45:27,935 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 12:45:27,936 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 12:45:27,936 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 12:45:27,936 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-01 12:45:27,936 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-01 12:45:27,936 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2023-04-01 12:45:27,936 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-01 12:45:27,936 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 12:45:27,936 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-01 12:45:27,937 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-01 12:45:27,937 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-01 12:45:27,937 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-01 12:45:27,937 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-01 12:45:27,937 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2023-04-01 12:45:27,937 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2023-04-01 12:45:27,937 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-01 12:45:27,937 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-01 12:45:27,937 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 12:45:27,938 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 12:45:27,938 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 12:45:27,938 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 12:45:27,938 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 12:45:27,938 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 12:45:27,938 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 12:45:28,081 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 12:45:28,083 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 12:45:28,542 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 12:45:28,652 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 12:45:28,652 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-01 12:45:28,654 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:45:28 BoogieIcfgContainer [2023-04-01 12:45:28,654 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 12:45:28,657 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 12:45:28,657 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 12:45:28,660 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 12:45:28,660 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 12:45:27" (1/3) ... [2023-04-01 12:45:28,661 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e2713d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:45:28, skipping insertion in model container [2023-04-01 12:45:28,661 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:45:27" (2/3) ... [2023-04-01 12:45:28,661 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e2713d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:45:28, skipping insertion in model container [2023-04-01 12:45:28,661 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:45:28" (3/3) ... [2023-04-01 12:45:28,666 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr.5.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-04-01 12:45:28,681 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 12:45:28,682 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 12:45:28,735 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 12:45:28,741 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;@546acdc0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 12:45:28,741 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 12:45:28,745 INFO L276 IsEmpty]: Start isEmpty. Operand has 81 states, 74 states have (on average 1.7162162162162162) internal successors, (127), 76 states have internal predecessors, (127), 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 12:45:28,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-04-01 12:45:28,755 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:45:28,756 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] [2023-04-01 12:45:28,757 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:45:28,764 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:45:28,765 INFO L85 PathProgramCache]: Analyzing trace with hash 326443, now seen corresponding path program 1 times [2023-04-01 12:45:28,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:45:28,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177479054] [2023-04-01 12:45:28,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:45:28,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:45:28,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:45:29,249 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 12:45:29,250 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:45:29,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177479054] [2023-04-01 12:45:29,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177479054] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:45:29,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:45:29,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:45:29,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140165648] [2023-04-01 12:45:29,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:45:29,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:45:29,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:45:29,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:45:29,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:45:29,291 INFO L87 Difference]: Start difference. First operand has 81 states, 74 states have (on average 1.7162162162162162) internal successors, (127), 76 states have internal predecessors, (127), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 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 12:45:29,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:45:29,401 INFO L93 Difference]: Finished difference Result 165 states and 249 transitions. [2023-04-01 12:45:29,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:45:29,404 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 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 52 [2023-04-01 12:45:29,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:45:29,415 INFO L225 Difference]: With dead ends: 165 [2023-04-01 12:45:29,415 INFO L226 Difference]: Without dead ends: 111 [2023-04-01 12:45:29,418 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 12:45:29,423 INFO L413 NwaCegarLoop]: 169 mSDtfsCounter, 87 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:45:29,424 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 226 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:45:29,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2023-04-01 12:45:29,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 109. [2023-04-01 12:45:29,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 105 states have (on average 1.3333333333333333) internal successors, (140), 105 states have internal predecessors, (140), 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 12:45:29,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 143 transitions. [2023-04-01 12:45:29,494 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 143 transitions. Word has length 52 [2023-04-01 12:45:29,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:45:29,496 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 143 transitions. [2023-04-01 12:45:29,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 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 12:45:29,497 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 143 transitions. [2023-04-01 12:45:29,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-04-01 12:45:29,500 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:45:29,500 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] [2023-04-01 12:45:29,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 12:45:29,500 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:45:29,501 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:45:29,501 INFO L85 PathProgramCache]: Analyzing trace with hash -1597040385, now seen corresponding path program 1 times [2023-04-01 12:45:29,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:45:29,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197350110] [2023-04-01 12:45:29,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:45:29,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:45:29,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:45:29,644 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 12:45:29,644 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:45:29,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197350110] [2023-04-01 12:45:29,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197350110] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:45:29,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:45:29,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:45:29,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588138922] [2023-04-01 12:45:29,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:45:29,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:45:29,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:45:29,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:45:29,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:45:29,649 INFO L87 Difference]: Start difference. First operand 109 states and 143 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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 12:45:29,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:45:29,743 INFO L93 Difference]: Finished difference Result 245 states and 343 transitions. [2023-04-01 12:45:29,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:45:29,746 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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 55 [2023-04-01 12:45:29,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:45:29,755 INFO L225 Difference]: With dead ends: 245 [2023-04-01 12:45:29,755 INFO L226 Difference]: Without dead ends: 173 [2023-04-01 12:45:29,759 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 12:45:29,761 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 51 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:45:29,762 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 177 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:45:29,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2023-04-01 12:45:29,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 171. [2023-04-01 12:45:29,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 167 states have (on average 1.3832335329341316) internal successors, (231), 167 states have internal predecessors, (231), 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 12:45:29,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 234 transitions. [2023-04-01 12:45:29,797 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 234 transitions. Word has length 55 [2023-04-01 12:45:29,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:45:29,797 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 234 transitions. [2023-04-01 12:45:29,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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 12:45:29,798 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 234 transitions. [2023-04-01 12:45:29,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-04-01 12:45:29,801 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:45:29,801 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] [2023-04-01 12:45:29,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 12:45:29,801 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:45:29,802 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:45:29,802 INFO L85 PathProgramCache]: Analyzing trace with hash 1651248739, now seen corresponding path program 1 times [2023-04-01 12:45:29,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:45:29,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502690989] [2023-04-01 12:45:29,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:45:29,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:45:29,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:45:29,947 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 12:45:29,947 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:45:29,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502690989] [2023-04-01 12:45:29,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502690989] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:45:29,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:45:29,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:45:29,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316981269] [2023-04-01 12:45:29,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:45:29,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:45:29,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:45:29,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:45:29,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:45:29,950 INFO L87 Difference]: Start difference. First operand 171 states and 234 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 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 12:45:30,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:45:30,017 INFO L93 Difference]: Finished difference Result 423 states and 604 transitions. [2023-04-01 12:45:30,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:45:30,018 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 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 58 [2023-04-01 12:45:30,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:45:30,021 INFO L225 Difference]: With dead ends: 423 [2023-04-01 12:45:30,021 INFO L226 Difference]: Without dead ends: 289 [2023-04-01 12:45:30,026 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 12:45:30,030 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 46 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:45:30,031 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 173 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:45:30,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2023-04-01 12:45:30,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 287. [2023-04-01 12:45:30,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 283 states have (on average 1.4098939929328622) internal successors, (399), 283 states have internal predecessors, (399), 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 12:45:30,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 402 transitions. [2023-04-01 12:45:30,080 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 402 transitions. Word has length 58 [2023-04-01 12:45:30,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:45:30,080 INFO L495 AbstractCegarLoop]: Abstraction has 287 states and 402 transitions. [2023-04-01 12:45:30,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 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 12:45:30,081 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 402 transitions. [2023-04-01 12:45:30,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-04-01 12:45:30,081 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:45:30,082 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] [2023-04-01 12:45:30,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 12:45:30,082 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:45:30,082 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:45:30,082 INFO L85 PathProgramCache]: Analyzing trace with hash -1270759560, now seen corresponding path program 1 times [2023-04-01 12:45:30,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:45:30,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608808108] [2023-04-01 12:45:30,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:45:30,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:45:30,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:45:30,171 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 12:45:30,171 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:45:30,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608808108] [2023-04-01 12:45:30,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608808108] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:45:30,172 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:45:30,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:45:30,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948917232] [2023-04-01 12:45:30,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:45:30,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:45:30,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:45:30,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:45:30,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:45:30,173 INFO L87 Difference]: Start difference. First operand 287 states and 402 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 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 12:45:30,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:45:30,269 INFO L93 Difference]: Finished difference Result 755 states and 1084 transitions. [2023-04-01 12:45:30,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:45:30,270 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 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 61 [2023-04-01 12:45:30,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:45:30,272 INFO L225 Difference]: With dead ends: 755 [2023-04-01 12:45:30,272 INFO L226 Difference]: Without dead ends: 505 [2023-04-01 12:45:30,274 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 12:45:30,280 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 41 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:45:30,281 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 169 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:45:30,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2023-04-01 12:45:30,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 503. [2023-04-01 12:45:30,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 499 states have (on average 1.4168336673346693) internal successors, (707), 499 states have internal predecessors, (707), 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 12:45:30,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 710 transitions. [2023-04-01 12:45:30,361 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 710 transitions. Word has length 61 [2023-04-01 12:45:30,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:45:30,362 INFO L495 AbstractCegarLoop]: Abstraction has 503 states and 710 transitions. [2023-04-01 12:45:30,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 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 12:45:30,362 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 710 transitions. [2023-04-01 12:45:30,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-04-01 12:45:30,367 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:45:30,368 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] [2023-04-01 12:45:30,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 12:45:30,368 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:45:30,369 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:45:30,369 INFO L85 PathProgramCache]: Analyzing trace with hash 250055778, now seen corresponding path program 1 times [2023-04-01 12:45:30,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:45:30,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248469505] [2023-04-01 12:45:30,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:45:30,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:45:30,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:45:30,492 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 12:45:30,493 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:45:30,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248469505] [2023-04-01 12:45:30,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248469505] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:45:30,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:45:30,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:45:30,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191965760] [2023-04-01 12:45:30,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:45:30,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:45:30,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:45:30,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:45:30,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:45:30,498 INFO L87 Difference]: Start difference. First operand 503 states and 710 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 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 12:45:30,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:45:30,694 INFO L93 Difference]: Finished difference Result 1371 states and 1960 transitions. [2023-04-01 12:45:30,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:45:30,694 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 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 64 [2023-04-01 12:45:30,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:45:30,702 INFO L225 Difference]: With dead ends: 1371 [2023-04-01 12:45:30,703 INFO L226 Difference]: Without dead ends: 905 [2023-04-01 12:45:30,704 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 12:45:30,704 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 36 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:45:30,705 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 165 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:45:30,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 905 states. [2023-04-01 12:45:30,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 905 to 903. [2023-04-01 12:45:30,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 903 states, 899 states have (on average 1.4093437152391546) internal successors, (1267), 899 states have internal predecessors, (1267), 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 12:45:30,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 903 states to 903 states and 1270 transitions. [2023-04-01 12:45:30,840 INFO L78 Accepts]: Start accepts. Automaton has 903 states and 1270 transitions. Word has length 64 [2023-04-01 12:45:30,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:45:30,840 INFO L495 AbstractCegarLoop]: Abstraction has 903 states and 1270 transitions. [2023-04-01 12:45:30,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 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 12:45:30,841 INFO L276 IsEmpty]: Start isEmpty. Operand 903 states and 1270 transitions. [2023-04-01 12:45:30,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-04-01 12:45:30,842 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:45:30,843 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] [2023-04-01 12:45:30,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 12:45:30,845 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:45:30,845 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:45:30,846 INFO L85 PathProgramCache]: Analyzing trace with hash -2030654792, now seen corresponding path program 1 times [2023-04-01 12:45:30,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:45:30,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5848942] [2023-04-01 12:45:30,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:45:30,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:45:30,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:45:31,064 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 12:45:31,064 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:45:31,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5848942] [2023-04-01 12:45:31,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5848942] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:45:31,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:45:31,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-01 12:45:31,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131174186] [2023-04-01 12:45:31,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:45:31,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 12:45:31,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:45:31,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 12:45:31,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 12:45:31,066 INFO L87 Difference]: Start difference. First operand 903 states and 1270 transitions. Second operand has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 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 12:45:31,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:45:31,751 INFO L93 Difference]: Finished difference Result 3695 states and 5253 transitions. [2023-04-01 12:45:31,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 12:45:31,751 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 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 67 [2023-04-01 12:45:31,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:45:31,764 INFO L225 Difference]: With dead ends: 3695 [2023-04-01 12:45:31,764 INFO L226 Difference]: Without dead ends: 2829 [2023-04-01 12:45:31,767 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2023-04-01 12:45:31,768 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 558 mSDsluCounter, 1245 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 558 SdHoareTripleChecker+Valid, 1330 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 12:45:31,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [558 Valid, 1330 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 12:45:31,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2829 states. [2023-04-01 12:45:31,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2829 to 1251. [2023-04-01 12:45:31,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1251 states, 1247 states have (on average 1.396952686447474) internal successors, (1742), 1247 states have internal predecessors, (1742), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:45:31,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1251 states to 1251 states and 1745 transitions. [2023-04-01 12:45:31,970 INFO L78 Accepts]: Start accepts. Automaton has 1251 states and 1745 transitions. Word has length 67 [2023-04-01 12:45:31,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:45:31,971 INFO L495 AbstractCegarLoop]: Abstraction has 1251 states and 1745 transitions. [2023-04-01 12:45:31,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 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 12:45:31,971 INFO L276 IsEmpty]: Start isEmpty. Operand 1251 states and 1745 transitions. [2023-04-01 12:45:31,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-04-01 12:45:31,972 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:45:31,972 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] [2023-04-01 12:45:31,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-01 12:45:31,972 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:45:31,972 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:45:31,973 INFO L85 PathProgramCache]: Analyzing trace with hash 1857672883, now seen corresponding path program 1 times [2023-04-01 12:45:31,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:45:31,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906087014] [2023-04-01 12:45:31,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:45:31,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:45:31,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:45:32,063 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 12:45:32,063 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:45:32,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906087014] [2023-04-01 12:45:32,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906087014] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:45:32,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:45:32,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:45:32,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489602869] [2023-04-01 12:45:32,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:45:32,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:45:32,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:45:32,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:45:32,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:45:32,065 INFO L87 Difference]: Start difference. First operand 1251 states and 1745 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 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 12:45:32,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:45:32,484 INFO L93 Difference]: Finished difference Result 3185 states and 4491 transitions. [2023-04-01 12:45:32,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:45:32,484 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 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 69 [2023-04-01 12:45:32,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:45:32,492 INFO L225 Difference]: With dead ends: 3185 [2023-04-01 12:45:32,492 INFO L226 Difference]: Without dead ends: 1971 [2023-04-01 12:45:32,495 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 12:45:32,496 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 30 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:45:32,496 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 137 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:45:32,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1971 states. [2023-04-01 12:45:32,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1971 to 1969. [2023-04-01 12:45:32,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1969 states, 1965 states have (on average 1.4055979643765903) internal successors, (2762), 1965 states have internal predecessors, (2762), 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 12:45:32,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1969 states to 1969 states and 2765 transitions. [2023-04-01 12:45:32,841 INFO L78 Accepts]: Start accepts. Automaton has 1969 states and 2765 transitions. Word has length 69 [2023-04-01 12:45:32,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:45:32,841 INFO L495 AbstractCegarLoop]: Abstraction has 1969 states and 2765 transitions. [2023-04-01 12:45:32,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 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 12:45:32,841 INFO L276 IsEmpty]: Start isEmpty. Operand 1969 states and 2765 transitions. [2023-04-01 12:45:32,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-04-01 12:45:32,842 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:45:32,842 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] [2023-04-01 12:45:32,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-01 12:45:32,842 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:45:32,843 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:45:32,843 INFO L85 PathProgramCache]: Analyzing trace with hash 1877722226, now seen corresponding path program 1 times [2023-04-01 12:45:32,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:45:32,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266010452] [2023-04-01 12:45:32,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:45:32,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:45:32,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:45:33,106 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 12:45:33,107 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:45:33,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266010452] [2023-04-01 12:45:33,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266010452] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:45:33,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:45:33,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-01 12:45:33,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968454281] [2023-04-01 12:45:33,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:45:33,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 12:45:33,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:45:33,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 12:45:33,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-04-01 12:45:33,108 INFO L87 Difference]: Start difference. First operand 1969 states and 2765 transitions. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 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 12:45:33,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:45:33,564 INFO L93 Difference]: Finished difference Result 3901 states and 5492 transitions. [2023-04-01 12:45:33,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 12:45:33,564 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 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 69 [2023-04-01 12:45:33,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:45:33,571 INFO L225 Difference]: With dead ends: 3901 [2023-04-01 12:45:33,571 INFO L226 Difference]: Without dead ends: 1971 [2023-04-01 12:45:33,575 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2023-04-01 12:45:33,575 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 136 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:45:33,576 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 308 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:45:33,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1971 states. [2023-04-01 12:45:33,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1971 to 1969. [2023-04-01 12:45:33,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1969 states, 1965 states have (on average 1.4045801526717556) internal successors, (2760), 1965 states have internal predecessors, (2760), 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 12:45:33,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1969 states to 1969 states and 2763 transitions. [2023-04-01 12:45:33,880 INFO L78 Accepts]: Start accepts. Automaton has 1969 states and 2763 transitions. Word has length 69 [2023-04-01 12:45:33,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:45:33,880 INFO L495 AbstractCegarLoop]: Abstraction has 1969 states and 2763 transitions. [2023-04-01 12:45:33,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 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 12:45:33,881 INFO L276 IsEmpty]: Start isEmpty. Operand 1969 states and 2763 transitions. [2023-04-01 12:45:33,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-04-01 12:45:33,881 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:45:33,881 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] [2023-04-01 12:45:33,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-01 12:45:33,882 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:45:33,882 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:45:33,882 INFO L85 PathProgramCache]: Analyzing trace with hash -1922062490, now seen corresponding path program 1 times [2023-04-01 12:45:33,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:45:33,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412981416] [2023-04-01 12:45:33,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:45:33,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:45:33,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:45:33,974 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 12:45:33,974 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:45:33,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412981416] [2023-04-01 12:45:33,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412981416] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:45:33,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:45:33,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 12:45:33,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029721184] [2023-04-01 12:45:33,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:45:33,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 12:45:33,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:45:33,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 12:45:33,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 12:45:33,976 INFO L87 Difference]: Start difference. First operand 1969 states and 2763 transitions. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 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 12:45:34,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:45:34,443 INFO L93 Difference]: Finished difference Result 3899 states and 5487 transitions. [2023-04-01 12:45:34,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 12:45:34,444 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2023-04-01 12:45:34,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:45:34,451 INFO L225 Difference]: With dead ends: 3899 [2023-04-01 12:45:34,451 INFO L226 Difference]: Without dead ends: 1969 [2023-04-01 12:45:34,455 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-01 12:45:34,455 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 212 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:45:34,456 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [212 Valid, 71 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:45:34,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1969 states. [2023-04-01 12:45:34,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1969 to 1969. [2023-04-01 12:45:34,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1969 states, 1965 states have (on average 1.3842239185750635) internal successors, (2720), 1965 states have internal predecessors, (2720), 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 12:45:34,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1969 states to 1969 states and 2723 transitions. [2023-04-01 12:45:34,800 INFO L78 Accepts]: Start accepts. Automaton has 1969 states and 2723 transitions. Word has length 70 [2023-04-01 12:45:34,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:45:34,801 INFO L495 AbstractCegarLoop]: Abstraction has 1969 states and 2723 transitions. [2023-04-01 12:45:34,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 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 12:45:34,801 INFO L276 IsEmpty]: Start isEmpty. Operand 1969 states and 2723 transitions. [2023-04-01 12:45:34,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-04-01 12:45:34,802 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:45:34,802 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] [2023-04-01 12:45:34,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-01 12:45:34,802 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:45:34,802 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:45:34,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1610041099, now seen corresponding path program 1 times [2023-04-01 12:45:34,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:45:34,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847629096] [2023-04-01 12:45:34,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:45:34,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:45:34,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:45:34,921 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 12:45:34,921 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:45:34,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847629096] [2023-04-01 12:45:34,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847629096] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:45:34,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:45:34,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 12:45:34,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325616614] [2023-04-01 12:45:34,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:45:34,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 12:45:34,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:45:34,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 12:45:34,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 12:45:34,923 INFO L87 Difference]: Start difference. First operand 1969 states and 2723 transitions. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 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 12:45:35,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:45:35,338 INFO L93 Difference]: Finished difference Result 3899 states and 5407 transitions. [2023-04-01 12:45:35,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 12:45:35,339 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2023-04-01 12:45:35,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:45:35,347 INFO L225 Difference]: With dead ends: 3899 [2023-04-01 12:45:35,347 INFO L226 Difference]: Without dead ends: 1969 [2023-04-01 12:45:35,351 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-01 12:45:35,352 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 196 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:45:35,352 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [196 Valid, 79 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:45:35,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1969 states. [2023-04-01 12:45:35,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1969 to 1969. [2023-04-01 12:45:35,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1969 states, 1965 states have (on average 1.36793893129771) internal successors, (2688), 1965 states have internal predecessors, (2688), 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 12:45:35,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1969 states to 1969 states and 2691 transitions. [2023-04-01 12:45:35,665 INFO L78 Accepts]: Start accepts. Automaton has 1969 states and 2691 transitions. Word has length 70 [2023-04-01 12:45:35,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:45:35,666 INFO L495 AbstractCegarLoop]: Abstraction has 1969 states and 2691 transitions. [2023-04-01 12:45:35,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 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 12:45:35,666 INFO L276 IsEmpty]: Start isEmpty. Operand 1969 states and 2691 transitions. [2023-04-01 12:45:35,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-04-01 12:45:35,666 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:45:35,667 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:45:35,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-01 12:45:35,667 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:45:35,667 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:45:35,667 INFO L85 PathProgramCache]: Analyzing trace with hash 1738126406, now seen corresponding path program 1 times [2023-04-01 12:45:35,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:45:35,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471494685] [2023-04-01 12:45:35,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:45:35,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:45:35,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:45:35,759 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 12:45:35,760 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:45:35,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471494685] [2023-04-01 12:45:35,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471494685] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:45:35,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:45:35,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 12:45:35,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888130681] [2023-04-01 12:45:35,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:45:35,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 12:45:35,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:45:35,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 12:45:35,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 12:45:35,762 INFO L87 Difference]: Start difference. First operand 1969 states and 2691 transitions. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 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 12:45:36,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:45:36,188 INFO L93 Difference]: Finished difference Result 3899 states and 5343 transitions. [2023-04-01 12:45:36,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 12:45:36,188 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2023-04-01 12:45:36,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:45:36,195 INFO L225 Difference]: With dead ends: 3899 [2023-04-01 12:45:36,195 INFO L226 Difference]: Without dead ends: 1969 [2023-04-01 12:45:36,199 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-01 12:45:36,199 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 167 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:45:36,200 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 95 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:45:36,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1969 states. [2023-04-01 12:45:36,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1969 to 1969. [2023-04-01 12:45:36,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1969 states, 1965 states have (on average 1.35470737913486) internal successors, (2662), 1965 states have internal predecessors, (2662), 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 12:45:36,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1969 states to 1969 states and 2665 transitions. [2023-04-01 12:45:36,496 INFO L78 Accepts]: Start accepts. Automaton has 1969 states and 2665 transitions. Word has length 70 [2023-04-01 12:45:36,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:45:36,496 INFO L495 AbstractCegarLoop]: Abstraction has 1969 states and 2665 transitions. [2023-04-01 12:45:36,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 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 12:45:36,497 INFO L276 IsEmpty]: Start isEmpty. Operand 1969 states and 2665 transitions. [2023-04-01 12:45:36,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-04-01 12:45:36,497 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:45:36,497 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] [2023-04-01 12:45:36,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-04-01 12:45:36,498 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:45:36,498 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:45:36,498 INFO L85 PathProgramCache]: Analyzing trace with hash 1208835905, now seen corresponding path program 1 times [2023-04-01 12:45:36,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:45:36,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101638085] [2023-04-01 12:45:36,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:45:36,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:45:36,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:45:36,697 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 12:45:36,697 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:45:36,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101638085] [2023-04-01 12:45:36,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101638085] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:45:36,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:45:36,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 12:45:36,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757472859] [2023-04-01 12:45:36,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:45:36,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 12:45:36,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:45:36,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 12:45:36,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 12:45:36,699 INFO L87 Difference]: Start difference. First operand 1969 states and 2665 transitions. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 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 12:45:37,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:45:37,360 INFO L93 Difference]: Finished difference Result 3238 states and 4330 transitions. [2023-04-01 12:45:37,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 12:45:37,361 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 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 70 [2023-04-01 12:45:37,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:45:37,373 INFO L225 Difference]: With dead ends: 3238 [2023-04-01 12:45:37,373 INFO L226 Difference]: Without dead ends: 3236 [2023-04-01 12:45:37,374 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 12:45:37,375 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 95 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:45:37,375 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 411 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:45:37,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3236 states. [2023-04-01 12:45:37,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3236 to 2033. [2023-04-01 12:45:37,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2033 states, 2029 states have (on average 1.3198620009857072) internal successors, (2678), 2029 states have internal predecessors, (2678), 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 12:45:37,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2033 states to 2033 states and 2681 transitions. [2023-04-01 12:45:37,843 INFO L78 Accepts]: Start accepts. Automaton has 2033 states and 2681 transitions. Word has length 70 [2023-04-01 12:45:37,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:45:37,843 INFO L495 AbstractCegarLoop]: Abstraction has 2033 states and 2681 transitions. [2023-04-01 12:45:37,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 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 12:45:37,843 INFO L276 IsEmpty]: Start isEmpty. Operand 2033 states and 2681 transitions. [2023-04-01 12:45:37,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-04-01 12:45:37,844 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:45:37,844 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:45:37,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-04-01 12:45:37,845 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:45:37,845 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:45:37,845 INFO L85 PathProgramCache]: Analyzing trace with hash 1124147290, now seen corresponding path program 1 times [2023-04-01 12:45:37,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:45:37,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315056896] [2023-04-01 12:45:37,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:45:37,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:45:37,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:45:45,166 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:45:45,166 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:45:45,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315056896] [2023-04-01 12:45:45,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315056896] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 12:45:45,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557240476] [2023-04-01 12:45:45,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:45:45,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 12:45:45,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 12:45:45,171 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 12:45:45,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 12:45:45,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:45:45,377 INFO L262 TraceCheckSpWp]: Trace formula consists of 730 conjuncts, 83 conjunts are in the unsatisfiable core [2023-04-01 12:45:45,386 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 12:46:01,919 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:46:01,919 INFO L327 TraceCheckSpWp]: Computing backward predicates...