/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.5.1.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 06:29:38,707 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 06:29:38,709 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 06:29:38,749 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 06:29:38,750 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 06:29:38,753 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 06:29:38,757 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 06:29:38,759 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 06:29:38,761 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 06:29:38,765 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 06:29:38,767 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 06:29:38,769 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 06:29:38,769 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 06:29:38,771 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 06:29:38,772 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 06:29:38,773 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 06:29:38,774 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 06:29:38,775 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 06:29:38,777 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 06:29:38,782 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 06:29:38,783 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 06:29:38,785 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 06:29:38,785 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 06:29:38,787 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 06:29:38,794 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 06:29:38,795 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 06:29:38,795 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 06:29:38,797 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 06:29:38,797 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 06:29:38,798 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 06:29:38,798 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 06:29:38,799 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 06:29:38,800 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 06:29:38,801 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 06:29:38,802 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 06:29:38,802 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 06:29:38,803 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 06:29:38,803 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 06:29:38,803 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 06:29:38,804 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 06:29:38,805 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 06:29:38,806 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 06:29:38,839 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 06:29:38,839 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 06:29:38,839 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 06:29:38,840 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 06:29:38,841 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 06:29:38,841 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 06:29:38,841 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 06:29:38,841 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 06:29:38,841 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 06:29:38,841 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 06:29:38,842 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 06:29:38,842 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 06:29:38,842 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 06:29:38,842 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 06:29:38,843 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 06:29:38,843 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 06:29:38,843 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 06:29:38,843 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 06:29:38,844 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 06:29:38,844 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 06:29:38,844 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 06:29:38,844 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 06:29:38,844 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 06:29:38,844 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 06:29:38,844 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 06:29:38,845 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 06:29:38,845 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 06:29:38,845 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 06:29:38,845 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 06:29:38,846 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 06:29:38,846 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 06:29:38,846 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 06:29:38,846 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 06:29:38,846 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 06:29:38,846 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 06:29:38,847 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 06:29:38,847 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 06:29:38,847 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 06:29:38,847 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 06:29:38,847 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 06:29:38,847 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 06:29:38,847 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 06:29:39,115 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 06:29:39,137 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 06:29:39,140 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 06:29:39,141 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 06:29:39,142 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 06:29:39,144 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.5.1.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2023-04-01 06:29:40,442 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 06:29:40,930 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 06:29:40,931 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.5.1.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2023-04-01 06:29:40,970 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/199f3bf0a/13987de3a78648abad7bf22a95aecddc/FLAG627aa1f47 [2023-04-01 06:29:40,988 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/199f3bf0a/13987de3a78648abad7bf22a95aecddc [2023-04-01 06:29:40,990 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 06:29:40,993 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 06:29:40,996 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 06:29:40,996 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 06:29:40,999 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 06:29:40,999 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 06:29:40" (1/1) ... [2023-04-01 06:29:41,001 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21d79c21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:29:41, skipping insertion in model container [2023-04-01 06:29:41,001 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 06:29:40" (1/1) ... [2023-04-01 06:29:41,008 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 06:29:41,125 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 06:29:41,690 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.5.1.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c[36110,36123] [2023-04-01 06:29:42,045 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 06:29:42,064 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 06:29:42,305 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.5.1.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c[36110,36123] [2023-04-01 06:29:42,491 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 06:29:42,521 INFO L208 MainTranslator]: Completed translation [2023-04-01 06:29:42,521 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:29:42 WrapperNode [2023-04-01 06:29:42,522 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 06:29:42,523 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 06:29:42,523 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 06:29:42,523 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 06:29:42,534 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:29:42" (1/1) ... [2023-04-01 06:29:42,535 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:29:42" (1/1) ... [2023-04-01 06:29:42,594 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:29:42" (1/1) ... [2023-04-01 06:29:42,595 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:29:42" (1/1) ... [2023-04-01 06:29:42,650 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:29:42" (1/1) ... [2023-04-01 06:29:42,690 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:29:42" (1/1) ... [2023-04-01 06:29:42,706 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:29:42" (1/1) ... [2023-04-01 06:29:42,722 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:29:42" (1/1) ... [2023-04-01 06:29:42,746 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 06:29:42,747 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 06:29:42,747 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 06:29:42,748 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 06:29:42,749 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:29:42" (1/1) ... [2023-04-01 06:29:42,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 06:29:42,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 06:29:42,786 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 06:29:42,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 06:29:42,826 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 06:29:42,826 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 06:29:42,827 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 06:29:42,827 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 06:29:42,827 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 06:29:42,827 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 06:29:42,828 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 06:29:42,832 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 06:29:42,832 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 06:29:42,832 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-01 06:29:42,833 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-01 06:29:42,833 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-01 06:29:42,833 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 06:29:42,833 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-01 06:29:42,833 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-01 06:29:42,833 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-01 06:29:42,833 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-01 06:29:42,833 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-01 06:29:42,833 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2023-04-01 06:29:42,834 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2023-04-01 06:29:42,834 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-01 06:29:42,834 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-01 06:29:42,834 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 06:29:42,834 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 06:29:42,834 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 06:29:42,834 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 06:29:42,834 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 06:29:42,834 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 06:29:42,834 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 06:29:43,098 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 06:29:43,100 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 06:29:45,511 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 06:29:46,892 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 06:29:46,893 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-01 06:29:46,897 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 06:29:46 BoogieIcfgContainer [2023-04-01 06:29:46,897 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 06:29:46,899 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 06:29:46,900 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 06:29:46,902 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 06:29:46,903 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 06:29:40" (1/3) ... [2023-04-01 06:29:46,903 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@495cfcee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 06:29:46, skipping insertion in model container [2023-04-01 06:29:46,903 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:29:42" (2/3) ... [2023-04-01 06:29:46,904 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@495cfcee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 06:29:46, skipping insertion in model container [2023-04-01 06:29:46,904 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 06:29:46" (3/3) ... [2023-04-01 06:29:46,905 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_floodmax.5.1.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2023-04-01 06:29:46,921 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 06:29:46,921 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 06:29:46,979 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 06:29:46,984 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;@7864eb95, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 06:29:46,984 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 06:29:46,993 INFO L276 IsEmpty]: Start isEmpty. Operand has 1135 states, 1121 states have (on average 1.6824264049955397) internal successors, (1886), 1130 states have internal predecessors, (1886), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 06:29:47,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2023-04-01 06:29:47,105 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:29:47,106 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:29:47,107 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:29:47,111 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:29:47,111 INFO L85 PathProgramCache]: Analyzing trace with hash -1359650311, now seen corresponding path program 1 times [2023-04-01 06:29:47,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:29:47,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945476032] [2023-04-01 06:29:47,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:29:47,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:29:47,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:29:48,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:29:48,154 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:29:48,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945476032] [2023-04-01 06:29:48,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945476032] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:29:48,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:29:48,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 06:29:48,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350123832] [2023-04-01 06:29:48,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:29:48,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:29:48,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:29:48,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:29:48,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:29:48,209 INFO L87 Difference]: Start difference. First operand has 1135 states, 1121 states have (on average 1.6824264049955397) internal successors, (1886), 1130 states have internal predecessors, (1886), 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 83.33333333333333) internal successors, (250), 3 states have internal predecessors, (250), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:29:48,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:29:48,768 INFO L93 Difference]: Finished difference Result 2221 states and 3643 transitions. [2023-04-01 06:29:48,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 06:29:48,771 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 83.33333333333333) internal successors, (250), 3 states have internal predecessors, (250), 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 253 [2023-04-01 06:29:48,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:29:48,797 INFO L225 Difference]: With dead ends: 2221 [2023-04-01 06:29:48,797 INFO L226 Difference]: Without dead ends: 1552 [2023-04-01 06:29:48,811 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:29:48,815 INFO L413 NwaCegarLoop]: 2126 mSDtfsCounter, 885 mSDsluCounter, 1601 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 885 SdHoareTripleChecker+Valid, 3727 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 06:29:48,816 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [885 Valid, 3727 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 06:29:48,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1552 states. [2023-04-01 06:29:48,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1552 to 1550. [2023-04-01 06:29:48,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1550 states, 1546 states have (on average 1.5517464424320828) internal successors, (2399), 1546 states have internal predecessors, (2399), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:29:49,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1550 states to 1550 states and 2402 transitions. [2023-04-01 06:29:49,006 INFO L78 Accepts]: Start accepts. Automaton has 1550 states and 2402 transitions. Word has length 253 [2023-04-01 06:29:49,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:29:49,009 INFO L495 AbstractCegarLoop]: Abstraction has 1550 states and 2402 transitions. [2023-04-01 06:29:49,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 83.33333333333333) internal successors, (250), 3 states have internal predecessors, (250), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:29:49,010 INFO L276 IsEmpty]: Start isEmpty. Operand 1550 states and 2402 transitions. [2023-04-01 06:29:49,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2023-04-01 06:29:49,020 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:29:49,021 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:29:49,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 06:29:49,021 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:29:49,023 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:29:49,023 INFO L85 PathProgramCache]: Analyzing trace with hash -904992447, now seen corresponding path program 1 times [2023-04-01 06:29:49,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:29:49,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078104796] [2023-04-01 06:29:49,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:29:49,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:29:49,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:29:49,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:29:49,370 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:29:49,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078104796] [2023-04-01 06:29:49,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078104796] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:29:49,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:29:49,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 06:29:49,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656775659] [2023-04-01 06:29:49,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:29:49,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:29:49,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:29:49,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:29:49,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:29:49,374 INFO L87 Difference]: Start difference. First operand 1550 states and 2402 transitions. Second operand has 3 states, 3 states have (on average 86.66666666666667) internal successors, (260), 3 states have internal predecessors, (260), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:29:49,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:29:49,750 INFO L93 Difference]: Finished difference Result 3329 states and 5083 transitions. [2023-04-01 06:29:49,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 06:29:49,754 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 86.66666666666667) internal successors, (260), 3 states have internal predecessors, (260), 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 263 [2023-04-01 06:29:49,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:29:49,768 INFO L225 Difference]: With dead ends: 3329 [2023-04-01 06:29:49,769 INFO L226 Difference]: Without dead ends: 2292 [2023-04-01 06:29:49,775 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:29:49,777 INFO L413 NwaCegarLoop]: 1775 mSDtfsCounter, 807 mSDsluCounter, 1448 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 807 SdHoareTripleChecker+Valid, 3223 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 06:29:49,777 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [807 Valid, 3223 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 06:29:49,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2292 states. [2023-04-01 06:29:49,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2292 to 2290. [2023-04-01 06:29:49,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2290 states, 2286 states have (on average 1.5345581802274715) internal successors, (3508), 2286 states have internal predecessors, (3508), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:29:49,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2290 states to 2290 states and 3511 transitions. [2023-04-01 06:29:49,943 INFO L78 Accepts]: Start accepts. Automaton has 2290 states and 3511 transitions. Word has length 263 [2023-04-01 06:29:49,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:29:49,945 INFO L495 AbstractCegarLoop]: Abstraction has 2290 states and 3511 transitions. [2023-04-01 06:29:49,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 86.66666666666667) internal successors, (260), 3 states have internal predecessors, (260), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:29:49,945 INFO L276 IsEmpty]: Start isEmpty. Operand 2290 states and 3511 transitions. [2023-04-01 06:29:49,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2023-04-01 06:29:49,951 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:29:49,952 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:29:49,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 06:29:49,952 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:29:49,954 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:29:49,954 INFO L85 PathProgramCache]: Analyzing trace with hash 333610526, now seen corresponding path program 1 times [2023-04-01 06:29:49,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:29:49,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052548842] [2023-04-01 06:29:49,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:29:49,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:29:50,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:29:50,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:29:50,248 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:29:50,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052548842] [2023-04-01 06:29:50,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052548842] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:29:50,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:29:50,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 06:29:50,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403938096] [2023-04-01 06:29:50,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:29:50,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:29:50,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:29:50,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:29:50,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:29:50,251 INFO L87 Difference]: Start difference. First operand 2290 states and 3511 transitions. Second operand has 3 states, 3 states have (on average 90.0) internal successors, (270), 3 states have internal predecessors, (270), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:29:50,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:29:50,766 INFO L93 Difference]: Finished difference Result 5297 states and 8021 transitions. [2023-04-01 06:29:50,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 06:29:50,768 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 90.0) internal successors, (270), 3 states have internal predecessors, (270), 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 273 [2023-04-01 06:29:50,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:29:50,783 INFO L225 Difference]: With dead ends: 5297 [2023-04-01 06:29:50,784 INFO L226 Difference]: Without dead ends: 3543 [2023-04-01 06:29:50,790 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:29:50,794 INFO L413 NwaCegarLoop]: 1896 mSDtfsCounter, 797 mSDsluCounter, 1413 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 797 SdHoareTripleChecker+Valid, 3309 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 06:29:50,795 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [797 Valid, 3309 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 06:29:50,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3543 states. [2023-04-01 06:29:51,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3543 to 3541. [2023-04-01 06:29:51,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3541 states, 3537 states have (on average 1.5171048911506926) internal successors, (5366), 3537 states have internal predecessors, (5366), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:29:51,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3541 states to 3541 states and 5369 transitions. [2023-04-01 06:29:51,088 INFO L78 Accepts]: Start accepts. Automaton has 3541 states and 5369 transitions. Word has length 273 [2023-04-01 06:29:51,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:29:51,088 INFO L495 AbstractCegarLoop]: Abstraction has 3541 states and 5369 transitions. [2023-04-01 06:29:51,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 90.0) internal successors, (270), 3 states have internal predecessors, (270), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:29:51,089 INFO L276 IsEmpty]: Start isEmpty. Operand 3541 states and 5369 transitions. [2023-04-01 06:29:51,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2023-04-01 06:29:51,096 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:29:51,097 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:29:51,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 06:29:51,097 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:29:51,106 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:29:51,106 INFO L85 PathProgramCache]: Analyzing trace with hash -2077005683, now seen corresponding path program 1 times [2023-04-01 06:29:51,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:29:51,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718559633] [2023-04-01 06:29:51,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:29:51,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:29:51,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:29:51,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:29:51,398 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:29:51,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718559633] [2023-04-01 06:29:51,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718559633] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:29:51,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:29:51,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 06:29:51,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189982845] [2023-04-01 06:29:51,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:29:51,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:29:51,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:29:51,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:29:51,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:29:51,401 INFO L87 Difference]: Start difference. First operand 3541 states and 5369 transitions. Second operand has 3 states, 3 states have (on average 93.33333333333333) internal successors, (280), 3 states have internal predecessors, (280), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:29:52,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:29:52,105 INFO L93 Difference]: Finished difference Result 8568 states and 12850 transitions. [2023-04-01 06:29:52,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 06:29:52,106 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 93.33333333333333) internal successors, (280), 3 states have internal predecessors, (280), 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 283 [2023-04-01 06:29:52,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:29:52,132 INFO L225 Difference]: With dead ends: 8568 [2023-04-01 06:29:52,132 INFO L226 Difference]: Without dead ends: 5586 [2023-04-01 06:29:52,143 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:29:52,147 INFO L413 NwaCegarLoop]: 1858 mSDtfsCounter, 788 mSDsluCounter, 1378 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 788 SdHoareTripleChecker+Valid, 3236 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 06:29:52,149 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [788 Valid, 3236 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 06:29:52,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5586 states. [2023-04-01 06:29:52,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5586 to 5584. [2023-04-01 06:29:52,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5584 states, 5580 states have (on average 1.4982078853046594) internal successors, (8360), 5580 states have internal predecessors, (8360), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:29:52,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5584 states to 5584 states and 8363 transitions. [2023-04-01 06:29:52,641 INFO L78 Accepts]: Start accepts. Automaton has 5584 states and 8363 transitions. Word has length 283 [2023-04-01 06:29:52,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:29:52,642 INFO L495 AbstractCegarLoop]: Abstraction has 5584 states and 8363 transitions. [2023-04-01 06:29:52,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 93.33333333333333) internal successors, (280), 3 states have internal predecessors, (280), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:29:52,642 INFO L276 IsEmpty]: Start isEmpty. Operand 5584 states and 8363 transitions. [2023-04-01 06:29:52,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2023-04-01 06:29:52,652 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:29:52,652 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:29:52,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 06:29:52,653 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:29:52,653 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:29:52,653 INFO L85 PathProgramCache]: Analyzing trace with hash 605013769, now seen corresponding path program 1 times [2023-04-01 06:29:52,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:29:52,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475450665] [2023-04-01 06:29:52,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:29:52,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:29:52,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:29:52,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:29:52,920 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:29:52,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475450665] [2023-04-01 06:29:52,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475450665] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:29:52,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:29:52,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 06:29:52,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947079818] [2023-04-01 06:29:52,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:29:52,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:29:52,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:29:52,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:29:52,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:29:52,927 INFO L87 Difference]: Start difference. First operand 5584 states and 8363 transitions. Second operand has 3 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:29:53,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:29:53,986 INFO L93 Difference]: Finished difference Result 13755 states and 20375 transitions. [2023-04-01 06:29:53,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 06:29:53,988 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 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 293 [2023-04-01 06:29:53,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:29:54,023 INFO L225 Difference]: With dead ends: 13755 [2023-04-01 06:29:54,023 INFO L226 Difference]: Without dead ends: 8753 [2023-04-01 06:29:54,036 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:29:54,038 INFO L413 NwaCegarLoop]: 1664 mSDtfsCounter, 780 mSDsluCounter, 1343 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 780 SdHoareTripleChecker+Valid, 3007 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 06:29:54,039 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [780 Valid, 3007 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 06:29:54,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8753 states. [2023-04-01 06:29:54,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8753 to 8751. [2023-04-01 06:29:54,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8751 states, 8747 states have (on average 1.4750200068594947) internal successors, (12902), 8747 states have internal predecessors, (12902), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:29:54,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8751 states to 8751 states and 12905 transitions. [2023-04-01 06:29:54,864 INFO L78 Accepts]: Start accepts. Automaton has 8751 states and 12905 transitions. Word has length 293 [2023-04-01 06:29:54,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:29:54,865 INFO L495 AbstractCegarLoop]: Abstraction has 8751 states and 12905 transitions. [2023-04-01 06:29:54,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:29:54,865 INFO L276 IsEmpty]: Start isEmpty. Operand 8751 states and 12905 transitions. [2023-04-01 06:29:54,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2023-04-01 06:29:54,881 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:29:54,882 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:29:54,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 06:29:54,883 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:29:54,883 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:29:54,884 INFO L85 PathProgramCache]: Analyzing trace with hash -2090828736, now seen corresponding path program 1 times [2023-04-01 06:29:54,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:29:54,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735322853] [2023-04-01 06:29:54,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:29:54,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:29:55,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:29:56,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:29:56,466 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:29:56,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735322853] [2023-04-01 06:29:56,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735322853] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:29:56,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:29:56,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 06:29:56,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893838619] [2023-04-01 06:29:56,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:29:56,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 06:29:56,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:29:56,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 06:29:56,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 06:29:56,469 INFO L87 Difference]: Start difference. First operand 8751 states and 12905 transitions. Second operand has 4 states, 4 states have (on average 75.0) internal successors, (300), 4 states have internal predecessors, (300), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:29:58,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:29:58,812 INFO L93 Difference]: Finished difference Result 26024 states and 38370 transitions. [2023-04-01 06:29:58,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 06:29:58,814 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 75.0) internal successors, (300), 4 states have internal predecessors, (300), 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 303 [2023-04-01 06:29:58,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:29:58,869 INFO L225 Difference]: With dead ends: 26024 [2023-04-01 06:29:58,869 INFO L226 Difference]: Without dead ends: 17288 [2023-04-01 06:29:58,895 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-01 06:29:58,896 INFO L413 NwaCegarLoop]: 2550 mSDtfsCounter, 4027 mSDsluCounter, 1597 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4027 SdHoareTripleChecker+Valid, 4147 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 06:29:58,896 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4027 Valid, 4147 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 06:29:58,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17288 states. [2023-04-01 06:30:00,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17288 to 17286. [2023-04-01 06:30:00,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17286 states, 17282 states have (on average 1.471010299733827) internal successors, (25422), 17282 states have internal predecessors, (25422), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:30:00,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17286 states to 17286 states and 25425 transitions. [2023-04-01 06:30:00,577 INFO L78 Accepts]: Start accepts. Automaton has 17286 states and 25425 transitions. Word has length 303 [2023-04-01 06:30:00,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:30:00,578 INFO L495 AbstractCegarLoop]: Abstraction has 17286 states and 25425 transitions. [2023-04-01 06:30:00,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 75.0) internal successors, (300), 4 states have internal predecessors, (300), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:30:00,578 INFO L276 IsEmpty]: Start isEmpty. Operand 17286 states and 25425 transitions. [2023-04-01 06:30:00,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2023-04-01 06:30:00,605 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:30:00,606 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:30:00,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-01 06:30:00,606 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:30:00,607 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:30:00,607 INFO L85 PathProgramCache]: Analyzing trace with hash 1140246349, now seen corresponding path program 1 times [2023-04-01 06:30:00,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:30:00,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870558287] [2023-04-01 06:30:00,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:30:00,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:30:00,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:30:00,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:30:00,892 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:30:00,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870558287] [2023-04-01 06:30:00,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870558287] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:30:00,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:30:00,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 06:30:00,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377718349] [2023-04-01 06:30:00,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:30:00,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:30:00,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:30:00,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:30:00,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:30:00,895 INFO L87 Difference]: Start difference. First operand 17286 states and 25425 transitions. Second operand has 3 states, 3 states have (on average 100.66666666666667) internal successors, (302), 3 states have internal predecessors, (302), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:30:04,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:30:04,327 INFO L93 Difference]: Finished difference Result 51232 states and 75304 transitions. [2023-04-01 06:30:04,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 06:30:04,329 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 100.66666666666667) internal successors, (302), 3 states have internal predecessors, (302), 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 305 [2023-04-01 06:30:04,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:30:04,428 INFO L225 Difference]: With dead ends: 51232 [2023-04-01 06:30:04,428 INFO L226 Difference]: Without dead ends: 34134 [2023-04-01 06:30:04,469 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:30:04,470 INFO L413 NwaCegarLoop]: 3180 mSDtfsCounter, 1529 mSDsluCounter, 1608 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1529 SdHoareTripleChecker+Valid, 4788 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 06:30:04,470 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1529 Valid, 4788 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 06:30:04,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34134 states. [2023-04-01 06:30:07,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34134 to 34132. [2023-04-01 06:30:07,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34132 states, 34128 states have (on average 1.467065166432255) internal successors, (50068), 34128 states have internal predecessors, (50068), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:30:07,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34132 states to 34132 states and 50071 transitions. [2023-04-01 06:30:07,980 INFO L78 Accepts]: Start accepts. Automaton has 34132 states and 50071 transitions. Word has length 305 [2023-04-01 06:30:07,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:30:07,980 INFO L495 AbstractCegarLoop]: Abstraction has 34132 states and 50071 transitions. [2023-04-01 06:30:07,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 100.66666666666667) internal successors, (302), 3 states have internal predecessors, (302), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:30:07,981 INFO L276 IsEmpty]: Start isEmpty. Operand 34132 states and 50071 transitions. [2023-04-01 06:30:08,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2023-04-01 06:30:08,026 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:30:08,026 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:30:08,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-01 06:30:08,026 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:30:08,027 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:30:08,027 INFO L85 PathProgramCache]: Analyzing trace with hash -1200594909, now seen corresponding path program 1 times [2023-04-01 06:30:08,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:30:08,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890199290] [2023-04-01 06:30:08,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:30:08,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:30:08,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:30:08,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:30:08,219 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:30:08,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890199290] [2023-04-01 06:30:08,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890199290] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:30:08,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:30:08,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 06:30:08,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239462367] [2023-04-01 06:30:08,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:30:08,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:30:08,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:30:08,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:30:08,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:30:08,222 INFO L87 Difference]: Start difference. First operand 34132 states and 50071 transitions. Second operand has 3 states, 3 states have (on average 101.0) internal successors, (303), 3 states have internal predecessors, (303), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:30:13,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:30:13,951 INFO L93 Difference]: Finished difference Result 102310 states and 150074 transitions. [2023-04-01 06:30:13,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 06:30:13,952 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 101.0) internal successors, (303), 3 states have internal predecessors, (303), 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 306 [2023-04-01 06:30:13,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:30:14,164 INFO L225 Difference]: With dead ends: 102310 [2023-04-01 06:30:14,164 INFO L226 Difference]: Without dead ends: 68224 [2023-04-01 06:30:14,237 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:30:14,239 INFO L413 NwaCegarLoop]: 3302 mSDtfsCounter, 1724 mSDsluCounter, 1650 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1724 SdHoareTripleChecker+Valid, 4952 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 06:30:14,239 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1724 Valid, 4952 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 06:30:14,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68224 states. [2023-04-01 06:30:18,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68224 to 34174. [2023-04-01 06:30:18,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34174 states, 34170 states have (on average 1.466988586479368) internal successors, (50127), 34170 states have internal predecessors, (50127), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:30:18,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34174 states to 34174 states and 50130 transitions. [2023-04-01 06:30:18,493 INFO L78 Accepts]: Start accepts. Automaton has 34174 states and 50130 transitions. Word has length 306 [2023-04-01 06:30:18,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:30:18,493 INFO L495 AbstractCegarLoop]: Abstraction has 34174 states and 50130 transitions. [2023-04-01 06:30:18,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 101.0) internal successors, (303), 3 states have internal predecessors, (303), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:30:18,494 INFO L276 IsEmpty]: Start isEmpty. Operand 34174 states and 50130 transitions. [2023-04-01 06:30:18,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2023-04-01 06:30:18,544 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:30:18,544 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:30:18,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-01 06:30:18,545 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:30:18,545 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:30:18,545 INFO L85 PathProgramCache]: Analyzing trace with hash -1980050552, now seen corresponding path program 1 times [2023-04-01 06:30:18,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:30:18,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81584760] [2023-04-01 06:30:18,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:30:18,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:30:18,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:30:18,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:30:18,830 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:30:18,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81584760] [2023-04-01 06:30:18,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81584760] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:30:18,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:30:18,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 06:30:18,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197698285] [2023-04-01 06:30:18,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:30:18,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:30:18,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:30:18,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:30:18,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:30:18,834 INFO L87 Difference]: Start difference. First operand 34174 states and 50130 transitions. Second operand has 3 states, 3 states have (on average 101.33333333333333) internal successors, (304), 3 states have internal predecessors, (304), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:30:26,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:30:26,022 INFO L93 Difference]: Finished difference Result 101103 states and 148193 transitions. [2023-04-01 06:30:26,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 06:30:26,026 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 101.33333333333333) internal successors, (304), 3 states have internal predecessors, (304), 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 307 [2023-04-01 06:30:26,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:30:26,204 INFO L225 Difference]: With dead ends: 101103 [2023-04-01 06:30:26,204 INFO L226 Difference]: Without dead ends: 67279 [2023-04-01 06:30:26,261 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:30:26,263 INFO L413 NwaCegarLoop]: 3270 mSDtfsCounter, 1527 mSDsluCounter, 1614 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1527 SdHoareTripleChecker+Valid, 4884 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 06:30:26,263 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1527 Valid, 4884 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 06:30:26,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67279 states.