/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_lcr-var-start-time.5.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-03 02:49:39,853 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-03 02:49:39,855 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-03 02:49:39,882 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-03 02:49:39,883 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-03 02:49:39,885 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-03 02:49:39,888 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-03 02:49:39,890 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-03 02:49:39,891 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-03 02:49:39,894 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-03 02:49:39,895 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-03 02:49:39,897 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-03 02:49:39,897 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-03 02:49:39,899 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-03 02:49:39,901 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-03 02:49:39,902 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-03 02:49:39,903 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-03 02:49:39,904 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-03 02:49:39,905 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-03 02:49:39,909 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-03 02:49:39,910 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-03 02:49:39,911 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-03 02:49:39,912 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-03 02:49:39,913 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-03 02:49:39,916 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-03 02:49:39,916 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-03 02:49:39,916 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-03 02:49:39,917 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-03 02:49:39,918 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-03 02:49:39,918 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-03 02:49:39,918 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-03 02:49:39,919 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-03 02:49:39,920 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-03 02:49:39,920 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-03 02:49:39,921 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-03 02:49:39,921 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-03 02:49:39,921 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-03 02:49:39,921 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-03 02:49:39,921 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-03 02:49:39,922 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-03 02:49:39,922 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-03 02:49:39,924 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 [2023-04-03 02:49:39,952 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-03 02:49:39,952 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-03 02:49:39,952 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-03 02:49:39,953 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-03 02:49:39,953 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-03 02:49:39,953 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-03 02:49:39,953 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-03 02:49:39,953 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-03 02:49:39,954 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-03 02:49:39,954 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-03 02:49:39,954 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-03 02:49:39,954 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-03 02:49:39,954 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-03 02:49:39,954 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-03 02:49:39,955 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-03 02:49:39,955 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-03 02:49:39,955 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-03 02:49:39,955 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-03 02:49:39,955 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-03 02:49:39,955 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-03 02:49:39,955 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-03 02:49:39,955 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-03 02:49:39,956 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-03 02:49:39,956 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-03 02:49:39,956 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-03 02:49:39,956 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-03 02:49:39,956 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-03 02:49:39,956 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-03 02:49:39,956 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-03 02:49:39,956 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-03 02:49:39,957 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-03 02:49:39,957 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-03 02:49:39,957 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 02:49:39,957 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-03 02:49:39,957 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-03 02:49:39,957 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-03 02:49:39,957 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-03 02:49:39,957 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-03 02:49:39,957 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-03 02:49:39,958 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-03 02:49:39,958 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-03 02:49:39,958 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-03 02:49:40,129 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-03 02:49:40,157 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-03 02:49:40,159 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-03 02:49:40,159 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-03 02:49:40,160 INFO L275 PluginConnector]: CDTParser initialized [2023-04-03 02:49:40,160 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2023-04-03 02:49:41,178 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-03 02:49:41,415 INFO L351 CDTParser]: Found 1 translation units. [2023-04-03 02:49:41,416 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2023-04-03 02:49:41,424 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f15a57748/301a92ca936e4e8e838b2169a269479a/FLAGa669ecfff [2023-04-03 02:49:41,434 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f15a57748/301a92ca936e4e8e838b2169a269479a [2023-04-03 02:49:41,436 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-03 02:49:41,437 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-03 02:49:41,437 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-03 02:49:41,438 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-03 02:49:41,440 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-03 02:49:41,440 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 02:49:41" (1/1) ... [2023-04-03 02:49:41,441 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54bca39c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:49:41, skipping insertion in model container [2023-04-03 02:49:41,441 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 02:49:41" (1/1) ... [2023-04-03 02:49:41,445 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-03 02:49:41,485 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-03 02:49:41,693 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c[8607,8620] [2023-04-03 02:49:41,755 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 02:49:41,774 INFO L203 MainTranslator]: Completed pre-run [2023-04-03 02:49:41,827 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c[8607,8620] [2023-04-03 02:49:41,867 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 02:49:41,887 INFO L208 MainTranslator]: Completed translation [2023-04-03 02:49:41,887 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:49:41 WrapperNode [2023-04-03 02:49:41,888 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-03 02:49:41,888 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-03 02:49:41,888 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-03 02:49:41,889 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-03 02:49:41,897 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:49:41" (1/1) ... [2023-04-03 02:49:41,897 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:49:41" (1/1) ... [2023-04-03 02:49:41,917 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:49:41" (1/1) ... [2023-04-03 02:49:41,918 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:49:41" (1/1) ... [2023-04-03 02:49:41,944 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:49:41" (1/1) ... [2023-04-03 02:49:41,955 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:49:41" (1/1) ... [2023-04-03 02:49:41,958 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:49:41" (1/1) ... [2023-04-03 02:49:41,959 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:49:41" (1/1) ... [2023-04-03 02:49:41,975 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-03 02:49:41,976 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-03 02:49:41,976 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-03 02:49:41,976 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-03 02:49:41,983 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:49:41" (1/1) ... [2023-04-03 02:49:41,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 02:49:41,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 02:49:42,006 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) [2023-04-03 02:49:42,041 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 [2023-04-03 02:49:42,054 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-03 02:49:42,054 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-03 02:49:42,054 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-03 02:49:42,055 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-03 02:49:42,055 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-03 02:49:42,055 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-03 02:49:42,055 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-03 02:49:42,055 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-03 02:49:42,055 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-03 02:49:42,055 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-03 02:49:42,055 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-03 02:49:42,055 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-03 02:49:42,055 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-03 02:49:42,055 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-03 02:49:42,057 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-03 02:49:42,057 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-03 02:49:42,057 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-03 02:49:42,057 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-03 02:49:42,057 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2023-04-03 02:49:42,057 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2023-04-03 02:49:42,057 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-03 02:49:42,057 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-03 02:49:42,057 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-03 02:49:42,057 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-03 02:49:42,057 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-03 02:49:42,057 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-03 02:49:42,057 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-03 02:49:42,057 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-03 02:49:42,058 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-03 02:49:42,163 INFO L236 CfgBuilder]: Building ICFG [2023-04-03 02:49:42,165 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-03 02:49:42,728 INFO L277 CfgBuilder]: Performing block encoding [2023-04-03 02:49:42,845 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-03 02:49:42,845 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-03 02:49:42,847 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 02:49:42 BoogieIcfgContainer [2023-04-03 02:49:42,847 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-03 02:49:42,849 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-03 02:49:42,849 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-03 02:49:42,851 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-03 02:49:42,851 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.04 02:49:41" (1/3) ... [2023-04-03 02:49:42,852 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d9928a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 02:49:42, skipping insertion in model container [2023-04-03 02:49:42,852 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:49:41" (2/3) ... [2023-04-03 02:49:42,852 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d9928a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 02:49:42, skipping insertion in model container [2023-04-03 02:49:42,852 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 02:49:42" (3/3) ... [2023-04-03 02:49:42,855 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.5.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2023-04-03 02:49:42,870 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-03 02:49:42,870 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-03 02:49:42,901 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-03 02:49:42,906 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;@3a371c24, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-03 02:49:42,906 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-03 02:49:42,910 INFO L276 IsEmpty]: Start isEmpty. Operand has 171 states, 165 states have (on average 1.696969696969697) internal successors, (280), 166 states have internal predecessors, (280), 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) [2023-04-03 02:49:42,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-04-03 02:49:42,916 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:49:42,916 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] [2023-04-03 02:49:42,917 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:49:42,920 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:49:42,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1934800137, now seen corresponding path program 1 times [2023-04-03 02:49:42,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:49:42,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137419723] [2023-04-03 02:49:42,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:49:42,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:49:43,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:49:43,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:49:43,670 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:49:43,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137419723] [2023-04-03 02:49:43,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137419723] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:49:43,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:49:43,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-03 02:49:43,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907782738] [2023-04-03 02:49:43,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:49:43,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-03 02:49:43,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:49:43,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-03 02:49:43,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-04-03 02:49:43,705 INFO L87 Difference]: Start difference. First operand has 171 states, 165 states have (on average 1.696969696969697) internal successors, (280), 166 states have internal predecessors, (280), 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 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 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) [2023-04-03 02:49:44,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:49:44,088 INFO L93 Difference]: Finished difference Result 595 states and 942 transitions. [2023-04-03 02:49:44,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-03 02:49:44,090 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 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 72 [2023-04-03 02:49:44,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:49:44,104 INFO L225 Difference]: With dead ends: 595 [2023-04-03 02:49:44,105 INFO L226 Difference]: Without dead ends: 484 [2023-04-03 02:49:44,108 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-04-03 02:49:44,110 INFO L413 NwaCegarLoop]: 459 mSDtfsCounter, 991 mSDsluCounter, 620 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 991 SdHoareTripleChecker+Valid, 1079 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-03 02:49:44,111 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [991 Valid, 1079 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-03 02:49:44,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2023-04-03 02:49:44,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 476. [2023-04-03 02:49:44,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 472 states have (on average 1.4046610169491525) internal successors, (663), 472 states have internal predecessors, (663), 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) [2023-04-03 02:49:44,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 666 transitions. [2023-04-03 02:49:44,214 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 666 transitions. Word has length 72 [2023-04-03 02:49:44,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:49:44,215 INFO L495 AbstractCegarLoop]: Abstraction has 476 states and 666 transitions. [2023-04-03 02:49:44,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 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) [2023-04-03 02:49:44,215 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 666 transitions. [2023-04-03 02:49:44,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-04-03 02:49:44,223 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:49:44,223 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] [2023-04-03 02:49:44,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-03 02:49:44,223 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:49:44,224 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:49:44,224 INFO L85 PathProgramCache]: Analyzing trace with hash -1126306455, now seen corresponding path program 1 times [2023-04-03 02:49:44,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:49:44,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912568300] [2023-04-03 02:49:44,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:49:44,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:49:44,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:49:44,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:49:44,422 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:49:44,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912568300] [2023-04-03 02:49:44,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912568300] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:49:44,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:49:44,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 02:49:44,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226033203] [2023-04-03 02:49:44,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:49:44,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:49:44,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:49:44,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:49:44,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:49:44,425 INFO L87 Difference]: Start difference. First operand 476 states and 666 transitions. Second operand has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 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) [2023-04-03 02:49:44,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:49:44,710 INFO L93 Difference]: Finished difference Result 1136 states and 1630 transitions. [2023-04-03 02:49:44,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 02:49:44,712 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2023-04-03 02:49:44,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:49:44,718 INFO L225 Difference]: With dead ends: 1136 [2023-04-03 02:49:44,718 INFO L226 Difference]: Without dead ends: 706 [2023-04-03 02:49:44,720 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-03 02:49:44,720 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 597 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 597 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-03 02:49:44,721 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [597 Valid, 231 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-03 02:49:44,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 706 states. [2023-04-03 02:49:44,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 706 to 704. [2023-04-03 02:49:44,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 704 states, 700 states have (on average 1.4285714285714286) internal successors, (1000), 700 states have internal predecessors, (1000), 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) [2023-04-03 02:49:44,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 704 states to 704 states and 1003 transitions. [2023-04-03 02:49:44,787 INFO L78 Accepts]: Start accepts. Automaton has 704 states and 1003 transitions. Word has length 73 [2023-04-03 02:49:44,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:49:44,787 INFO L495 AbstractCegarLoop]: Abstraction has 704 states and 1003 transitions. [2023-04-03 02:49:44,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 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) [2023-04-03 02:49:44,788 INFO L276 IsEmpty]: Start isEmpty. Operand 704 states and 1003 transitions. [2023-04-03 02:49:44,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-04-03 02:49:44,788 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:49:44,788 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] [2023-04-03 02:49:44,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-03 02:49:44,789 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:49:44,789 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:49:44,789 INFO L85 PathProgramCache]: Analyzing trace with hash 1463329878, now seen corresponding path program 1 times [2023-04-03 02:49:44,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:49:44,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999229719] [2023-04-03 02:49:44,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:49:44,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:49:44,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:49:44,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:49:44,921 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:49:44,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999229719] [2023-04-03 02:49:44,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999229719] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:49:44,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:49:44,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 02:49:44,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34696456] [2023-04-03 02:49:44,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:49:44,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:49:44,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:49:44,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:49:44,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:49:44,924 INFO L87 Difference]: Start difference. First operand 704 states and 1003 transitions. Second operand has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 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) [2023-04-03 02:49:45,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:49:45,236 INFO L93 Difference]: Finished difference Result 1798 states and 2618 transitions. [2023-04-03 02:49:45,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 02:49:45,237 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2023-04-03 02:49:45,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:49:45,245 INFO L225 Difference]: With dead ends: 1798 [2023-04-03 02:49:45,245 INFO L226 Difference]: Without dead ends: 1209 [2023-04-03 02:49:45,249 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-03 02:49:45,252 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 558 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 558 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:49:45,253 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [558 Valid, 255 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:49:45,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1209 states. [2023-04-03 02:49:45,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1209 to 1207. [2023-04-03 02:49:45,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1207 states, 1203 states have (on average 1.4480465502909394) internal successors, (1742), 1203 states have internal predecessors, (1742), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:49:45,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1207 states to 1207 states and 1745 transitions. [2023-04-03 02:49:45,400 INFO L78 Accepts]: Start accepts. Automaton has 1207 states and 1745 transitions. Word has length 73 [2023-04-03 02:49:45,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:49:45,402 INFO L495 AbstractCegarLoop]: Abstraction has 1207 states and 1745 transitions. [2023-04-03 02:49:45,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 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) [2023-04-03 02:49:45,402 INFO L276 IsEmpty]: Start isEmpty. Operand 1207 states and 1745 transitions. [2023-04-03 02:49:45,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-04-03 02:49:45,403 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:49:45,403 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] [2023-04-03 02:49:45,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-03 02:49:45,404 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:49:45,406 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:49:45,407 INFO L85 PathProgramCache]: Analyzing trace with hash -272179547, now seen corresponding path program 1 times [2023-04-03 02:49:45,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:49:45,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104759040] [2023-04-03 02:49:45,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:49:45,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:49:45,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:49:45,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:49:45,530 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:49:45,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104759040] [2023-04-03 02:49:45,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104759040] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:49:45,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:49:45,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 02:49:45,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216681833] [2023-04-03 02:49:45,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:49:45,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:49:45,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:49:45,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:49:45,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:49:45,532 INFO L87 Difference]: Start difference. First operand 1207 states and 1745 transitions. Second operand has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 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) [2023-04-03 02:49:45,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:49:45,900 INFO L93 Difference]: Finished difference Result 3273 states and 4807 transitions. [2023-04-03 02:49:45,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 02:49:45,901 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2023-04-03 02:49:45,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:49:45,909 INFO L225 Difference]: With dead ends: 3273 [2023-04-03 02:49:45,909 INFO L226 Difference]: Without dead ends: 2215 [2023-04-03 02:49:45,911 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-03 02:49:45,918 INFO L413 NwaCegarLoop]: 163 mSDtfsCounter, 576 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 576 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:49:45,919 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [576 Valid, 256 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:49:45,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2215 states. [2023-04-03 02:49:46,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2215 to 2213. [2023-04-03 02:49:46,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2213 states, 2209 states have (on average 1.4594839293798099) internal successors, (3224), 2209 states have internal predecessors, (3224), 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) [2023-04-03 02:49:46,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2213 states to 2213 states and 3227 transitions. [2023-04-03 02:49:46,147 INFO L78 Accepts]: Start accepts. Automaton has 2213 states and 3227 transitions. Word has length 73 [2023-04-03 02:49:46,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:49:46,147 INFO L495 AbstractCegarLoop]: Abstraction has 2213 states and 3227 transitions. [2023-04-03 02:49:46,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 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) [2023-04-03 02:49:46,147 INFO L276 IsEmpty]: Start isEmpty. Operand 2213 states and 3227 transitions. [2023-04-03 02:49:46,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-04-03 02:49:46,148 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:49:46,148 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] [2023-04-03 02:49:46,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-03 02:49:46,148 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:49:46,148 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:49:46,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1746746887, now seen corresponding path program 1 times [2023-04-03 02:49:46,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:49:46,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012430254] [2023-04-03 02:49:46,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:49:46,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:49:46,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:49:46,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:49:46,234 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:49:46,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012430254] [2023-04-03 02:49:46,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012430254] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:49:46,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:49:46,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 02:49:46,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287328006] [2023-04-03 02:49:46,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:49:46,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:49:46,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:49:46,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:49:46,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:49:46,236 INFO L87 Difference]: Start difference. First operand 2213 states and 3227 transitions. Second operand has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 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) [2023-04-03 02:49:46,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:49:46,780 INFO L93 Difference]: Finished difference Result 6355 states and 9343 transitions. [2023-04-03 02:49:46,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 02:49:46,782 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2023-04-03 02:49:46,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:49:46,792 INFO L225 Difference]: With dead ends: 6355 [2023-04-03 02:49:46,792 INFO L226 Difference]: Without dead ends: 4227 [2023-04-03 02:49:46,794 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-03 02:49:46,795 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 557 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 557 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:49:46,795 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [557 Valid, 247 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:49:46,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4227 states. [2023-04-03 02:49:47,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4227 to 4225. [2023-04-03 02:49:47,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4225 states, 4221 states have (on average 1.4593698175787728) internal successors, (6160), 4221 states have internal predecessors, (6160), 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) [2023-04-03 02:49:47,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4225 states to 4225 states and 6163 transitions. [2023-04-03 02:49:47,216 INFO L78 Accepts]: Start accepts. Automaton has 4225 states and 6163 transitions. Word has length 73 [2023-04-03 02:49:47,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:49:47,216 INFO L495 AbstractCegarLoop]: Abstraction has 4225 states and 6163 transitions. [2023-04-03 02:49:47,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 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) [2023-04-03 02:49:47,216 INFO L276 IsEmpty]: Start isEmpty. Operand 4225 states and 6163 transitions. [2023-04-03 02:49:47,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-04-03 02:49:47,217 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:49:47,217 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] [2023-04-03 02:49:47,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-03 02:49:47,217 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:49:47,218 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:49:47,218 INFO L85 PathProgramCache]: Analyzing trace with hash -1102287944, now seen corresponding path program 1 times [2023-04-03 02:49:47,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:49:47,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480407361] [2023-04-03 02:49:47,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:49:47,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:49:47,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:49:47,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:49:47,302 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:49:47,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480407361] [2023-04-03 02:49:47,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480407361] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:49:47,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:49:47,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 02:49:47,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084500390] [2023-04-03 02:49:47,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:49:47,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:49:47,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:49:47,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:49:47,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:49:47,304 INFO L87 Difference]: Start difference. First operand 4225 states and 6163 transitions. Second operand has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 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) [2023-04-03 02:49:48,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:49:48,303 INFO L93 Difference]: Finished difference Result 12414 states and 18188 transitions. [2023-04-03 02:49:48,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 02:49:48,304 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2023-04-03 02:49:48,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:49:48,325 INFO L225 Difference]: With dead ends: 12414 [2023-04-03 02:49:48,325 INFO L226 Difference]: Without dead ends: 8251 [2023-04-03 02:49:48,331 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-03 02:49:48,331 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 562 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 562 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-03 02:49:48,331 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [562 Valid, 239 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-03 02:49:48,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8251 states. [2023-04-03 02:49:49,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8251 to 8249. [2023-04-03 02:49:49,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8249 states, 8245 states have (on average 1.4516676773802304) internal successors, (11969), 8245 states have internal predecessors, (11969), 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) [2023-04-03 02:49:49,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8249 states to 8249 states and 11972 transitions. [2023-04-03 02:49:49,225 INFO L78 Accepts]: Start accepts. Automaton has 8249 states and 11972 transitions. Word has length 73 [2023-04-03 02:49:49,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:49:49,226 INFO L495 AbstractCegarLoop]: Abstraction has 8249 states and 11972 transitions. [2023-04-03 02:49:49,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 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) [2023-04-03 02:49:49,226 INFO L276 IsEmpty]: Start isEmpty. Operand 8249 states and 11972 transitions. [2023-04-03 02:49:49,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-04-03 02:49:49,227 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:49:49,227 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] [2023-04-03 02:49:49,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-03 02:49:49,227 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:49:49,227 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:49:49,227 INFO L85 PathProgramCache]: Analyzing trace with hash -1661703426, now seen corresponding path program 1 times [2023-04-03 02:49:49,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:49:49,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717786363] [2023-04-03 02:49:49,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:49:49,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:49:49,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:49:50,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:49:50,475 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:49:50,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717786363] [2023-04-03 02:49:50,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717786363] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:49:50,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:49:50,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2023-04-03 02:49:50,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643838259] [2023-04-03 02:49:50,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:49:50,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-04-03 02:49:50,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:49:50,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-04-03 02:49:50,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2023-04-03 02:49:50,477 INFO L87 Difference]: Start difference. First operand 8249 states and 11972 transitions. Second operand has 20 states, 20 states have (on average 3.55) internal successors, (71), 20 states have internal predecessors, (71), 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) [2023-04-03 02:49:53,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:49:53,688 INFO L93 Difference]: Finished difference Result 21190 states and 30733 transitions. [2023-04-03 02:49:53,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-04-03 02:49:53,689 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.55) internal successors, (71), 20 states have internal predecessors, (71), 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 74 [2023-04-03 02:49:53,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:49:53,736 INFO L225 Difference]: With dead ends: 21190 [2023-04-03 02:49:53,736 INFO L226 Difference]: Without dead ends: 21188 [2023-04-03 02:49:53,741 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=377, Invalid=1029, Unknown=0, NotChecked=0, Total=1406 [2023-04-03 02:49:53,741 INFO L413 NwaCegarLoop]: 257 mSDtfsCounter, 1344 mSDsluCounter, 895 mSDsCounter, 0 mSdLazyCounter, 525 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1344 SdHoareTripleChecker+Valid, 1152 SdHoareTripleChecker+Invalid, 566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-03 02:49:53,741 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1344 Valid, 1152 Invalid, 566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 525 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-03 02:49:53,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21188 states. [2023-04-03 02:49:55,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21188 to 16312. [2023-04-03 02:49:55,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16312 states, 16308 states have (on average 1.446345351974491) internal successors, (23587), 16308 states have internal predecessors, (23587), 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) [2023-04-03 02:49:55,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16312 states to 16312 states and 23590 transitions. [2023-04-03 02:49:55,652 INFO L78 Accepts]: Start accepts. Automaton has 16312 states and 23590 transitions. Word has length 74 [2023-04-03 02:49:55,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:49:55,653 INFO L495 AbstractCegarLoop]: Abstraction has 16312 states and 23590 transitions. [2023-04-03 02:49:55,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.55) internal successors, (71), 20 states have internal predecessors, (71), 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) [2023-04-03 02:49:55,653 INFO L276 IsEmpty]: Start isEmpty. Operand 16312 states and 23590 transitions. [2023-04-03 02:49:55,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-04-03 02:49:55,654 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:49:55,654 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] [2023-04-03 02:49:55,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-03 02:49:55,654 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:49:55,654 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:49:55,654 INFO L85 PathProgramCache]: Analyzing trace with hash -1456812002, now seen corresponding path program 1 times [2023-04-03 02:49:55,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:49:55,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989341598] [2023-04-03 02:49:55,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:49:55,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:49:55,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:49:56,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:49:56,701 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:49:56,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989341598] [2023-04-03 02:49:56,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989341598] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:49:56,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:49:56,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2023-04-03 02:49:56,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208926857] [2023-04-03 02:49:56,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:49:56,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-04-03 02:49:56,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:49:56,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-04-03 02:49:56,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2023-04-03 02:49:56,703 INFO L87 Difference]: Start difference. First operand 16312 states and 23590 transitions. Second operand has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 18 states have internal predecessors, (71), 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) [2023-04-03 02:49:59,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:49:59,303 INFO L93 Difference]: Finished difference Result 21720 states and 31332 transitions. [2023-04-03 02:49:59,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-04-03 02:49:59,304 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 18 states have internal predecessors, (71), 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 74 [2023-04-03 02:49:59,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:49:59,371 INFO L225 Difference]: With dead ends: 21720 [2023-04-03 02:49:59,372 INFO L226 Difference]: Without dead ends: 19670 [2023-04-03 02:49:59,383 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=188, Invalid=568, Unknown=0, NotChecked=0, Total=756 [2023-04-03 02:49:59,384 INFO L413 NwaCegarLoop]: 350 mSDtfsCounter, 1034 mSDsluCounter, 1437 mSDsCounter, 0 mSdLazyCounter, 759 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1034 SdHoareTripleChecker+Valid, 1787 SdHoareTripleChecker+Invalid, 793 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 759 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-03 02:49:59,384 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1034 Valid, 1787 Invalid, 793 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 759 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-03 02:49:59,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19670 states. [2023-04-03 02:50:01,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19670 to 18195. [2023-04-03 02:50:01,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18195 states, 18191 states have (on average 1.444065746797867) internal successors, (26269), 18191 states have internal predecessors, (26269), 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) [2023-04-03 02:50:01,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18195 states to 18195 states and 26272 transitions. [2023-04-03 02:50:01,457 INFO L78 Accepts]: Start accepts. Automaton has 18195 states and 26272 transitions. Word has length 74 [2023-04-03 02:50:01,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:50:01,457 INFO L495 AbstractCegarLoop]: Abstraction has 18195 states and 26272 transitions. [2023-04-03 02:50:01,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 18 states have internal predecessors, (71), 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) [2023-04-03 02:50:01,458 INFO L276 IsEmpty]: Start isEmpty. Operand 18195 states and 26272 transitions. [2023-04-03 02:50:01,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-04-03 02:50:01,459 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:50:01,459 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] [2023-04-03 02:50:01,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-03 02:50:01,459 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:50:01,460 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:50:01,460 INFO L85 PathProgramCache]: Analyzing trace with hash -1371071362, now seen corresponding path program 1 times [2023-04-03 02:50:01,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:50:01,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930492516] [2023-04-03 02:50:01,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:50:01,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:50:01,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:50:02,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:50:02,421 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:50:02,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930492516] [2023-04-03 02:50:02,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930492516] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:50:02,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:50:02,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2023-04-03 02:50:02,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838044062] [2023-04-03 02:50:02,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:50:02,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-04-03 02:50:02,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:50:02,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-04-03 02:50:02,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2023-04-03 02:50:02,423 INFO L87 Difference]: Start difference. First operand 18195 states and 26272 transitions. Second operand has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 18 states have internal predecessors, (71), 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) [2023-04-03 02:50:05,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:50:05,434 INFO L93 Difference]: Finished difference Result 21521 states and 30975 transitions. [2023-04-03 02:50:05,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-04-03 02:50:05,435 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 18 states have internal predecessors, (71), 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 74 [2023-04-03 02:50:05,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:50:05,469 INFO L225 Difference]: With dead ends: 21521 [2023-04-03 02:50:05,469 INFO L226 Difference]: Without dead ends: 21519 [2023-04-03 02:50:05,473 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=228, Invalid=642, Unknown=0, NotChecked=0, Total=870 [2023-04-03 02:50:05,474 INFO L413 NwaCegarLoop]: 337 mSDtfsCounter, 1125 mSDsluCounter, 1242 mSDsCounter, 0 mSdLazyCounter, 874 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1125 SdHoareTripleChecker+Valid, 1579 SdHoareTripleChecker+Invalid, 905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 874 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-03 02:50:05,474 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1125 Valid, 1579 Invalid, 905 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 874 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-03 02:50:05,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21519 states. [2023-04-03 02:50:07,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21519 to 18213. [2023-04-03 02:50:07,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18213 states, 18209 states have (on average 1.4437366137624252) internal successors, (26289), 18209 states have internal predecessors, (26289), 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) [2023-04-03 02:50:07,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18213 states to 18213 states and 26292 transitions. [2023-04-03 02:50:07,526 INFO L78 Accepts]: Start accepts. Automaton has 18213 states and 26292 transitions. Word has length 74 [2023-04-03 02:50:07,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:50:07,526 INFO L495 AbstractCegarLoop]: Abstraction has 18213 states and 26292 transitions. [2023-04-03 02:50:07,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 18 states have internal predecessors, (71), 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) [2023-04-03 02:50:07,526 INFO L276 IsEmpty]: Start isEmpty. Operand 18213 states and 26292 transitions. [2023-04-03 02:50:07,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-04-03 02:50:07,527 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:50:07,527 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] [2023-04-03 02:50:07,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-03 02:50:07,528 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:50:07,528 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:50:07,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1638810558, now seen corresponding path program 1 times [2023-04-03 02:50:07,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:50:07,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493358240] [2023-04-03 02:50:07,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:50:07,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:50:07,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:50:08,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:50:08,499 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:50:08,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493358240] [2023-04-03 02:50:08,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493358240] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:50:08,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:50:08,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2023-04-03 02:50:08,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636723580] [2023-04-03 02:50:08,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:50:08,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-04-03 02:50:08,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:50:08,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-04-03 02:50:08,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2023-04-03 02:50:08,501 INFO L87 Difference]: Start difference. First operand 18213 states and 26292 transitions. Second operand has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 18 states have internal predecessors, (71), 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) [2023-04-03 02:50:11,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:50:11,944 INFO L93 Difference]: Finished difference Result 25856 states and 37301 transitions. [2023-04-03 02:50:11,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-04-03 02:50:11,944 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 18 states have internal predecessors, (71), 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 74 [2023-04-03 02:50:11,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:50:11,986 INFO L225 Difference]: With dead ends: 25856 [2023-04-03 02:50:11,986 INFO L226 Difference]: Without dead ends: 25854 [2023-04-03 02:50:11,992 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=242, Invalid=688, Unknown=0, NotChecked=0, Total=930 [2023-04-03 02:50:11,993 INFO L413 NwaCegarLoop]: 359 mSDtfsCounter, 1110 mSDsluCounter, 1623 mSDsCounter, 0 mSdLazyCounter, 628 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1110 SdHoareTripleChecker+Valid, 1982 SdHoareTripleChecker+Invalid, 659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 628 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-03 02:50:11,993 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1110 Valid, 1982 Invalid, 659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 628 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-03 02:50:12,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25854 states. [2023-04-03 02:50:14,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25854 to 18235. [2023-04-03 02:50:14,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18235 states, 18231 states have (on average 1.4434753990455818) internal successors, (26316), 18231 states have internal predecessors, (26316), 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) [2023-04-03 02:50:14,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18235 states to 18235 states and 26319 transitions. [2023-04-03 02:50:14,103 INFO L78 Accepts]: Start accepts. Automaton has 18235 states and 26319 transitions. Word has length 74 [2023-04-03 02:50:14,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:50:14,103 INFO L495 AbstractCegarLoop]: Abstraction has 18235 states and 26319 transitions. [2023-04-03 02:50:14,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 18 states have internal predecessors, (71), 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) [2023-04-03 02:50:14,103 INFO L276 IsEmpty]: Start isEmpty. Operand 18235 states and 26319 transitions. [2023-04-03 02:50:14,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-04-03 02:50:14,104 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:50:14,104 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] [2023-04-03 02:50:14,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-03 02:50:14,105 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:50:14,105 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:50:14,105 INFO L85 PathProgramCache]: Analyzing trace with hash -1373014178, now seen corresponding path program 1 times [2023-04-03 02:50:14,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:50:14,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370491369] [2023-04-03 02:50:14,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:50:14,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:50:14,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:50:14,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:50:14,883 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:50:14,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370491369] [2023-04-03 02:50:14,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370491369] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:50:14,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:50:14,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2023-04-03 02:50:14,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015520381] [2023-04-03 02:50:14,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:50:14,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-04-03 02:50:14,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:50:14,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-04-03 02:50:14,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2023-04-03 02:50:14,884 INFO L87 Difference]: Start difference. First operand 18235 states and 26319 transitions. Second operand has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 18 states have internal predecessors, (71), 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) [2023-04-03 02:50:19,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:50:19,048 INFO L93 Difference]: Finished difference Result 28592 states and 41289 transitions. [2023-04-03 02:50:19,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-04-03 02:50:19,048 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 18 states have internal predecessors, (71), 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 74 [2023-04-03 02:50:19,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:50:19,095 INFO L225 Difference]: With dead ends: 28592 [2023-04-03 02:50:19,095 INFO L226 Difference]: Without dead ends: 28590 [2023-04-03 02:50:19,104 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=246, Invalid=684, Unknown=0, NotChecked=0, Total=930 [2023-04-03 02:50:19,105 INFO L413 NwaCegarLoop]: 359 mSDtfsCounter, 1190 mSDsluCounter, 1989 mSDsCounter, 0 mSdLazyCounter, 960 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1190 SdHoareTripleChecker+Valid, 2348 SdHoareTripleChecker+Invalid, 993 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 960 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-03 02:50:19,105 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1190 Valid, 2348 Invalid, 993 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 960 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-03 02:50:19,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28590 states. [2023-04-03 02:50:21,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28590 to 18261. [2023-04-03 02:50:21,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18261 states, 18257 states have (on average 1.4432272552993373) internal successors, (26349), 18257 states have internal predecessors, (26349), 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) [2023-04-03 02:50:21,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18261 states to 18261 states and 26352 transitions. [2023-04-03 02:50:21,292 INFO L78 Accepts]: Start accepts. Automaton has 18261 states and 26352 transitions. Word has length 74 [2023-04-03 02:50:21,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:50:21,293 INFO L495 AbstractCegarLoop]: Abstraction has 18261 states and 26352 transitions. [2023-04-03 02:50:21,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 18 states have internal predecessors, (71), 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) [2023-04-03 02:50:21,293 INFO L276 IsEmpty]: Start isEmpty. Operand 18261 states and 26352 transitions. [2023-04-03 02:50:21,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-04-03 02:50:21,294 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:50:21,294 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] [2023-04-03 02:50:21,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-04-03 02:50:21,294 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:50:21,294 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:50:21,294 INFO L85 PathProgramCache]: Analyzing trace with hash -248062765, now seen corresponding path program 1 times [2023-04-03 02:50:21,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:50:21,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543652912] [2023-04-03 02:50:21,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:50:21,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:50:21,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:50:22,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:50:22,386 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:50:22,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543652912] [2023-04-03 02:50:22,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543652912] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:50:22,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:50:22,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2023-04-03 02:50:22,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193442836] [2023-04-03 02:50:22,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:50:22,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-04-03 02:50:22,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:50:22,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-04-03 02:50:22,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2023-04-03 02:50:22,387 INFO L87 Difference]: Start difference. First operand 18261 states and 26352 transitions. Second operand has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 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) [2023-04-03 02:50:26,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:50:26,430 INFO L93 Difference]: Finished difference Result 23725 states and 34161 transitions. [2023-04-03 02:50:26,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-04-03 02:50:26,431 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2023-04-03 02:50:26,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:50:26,464 INFO L225 Difference]: With dead ends: 23725 [2023-04-03 02:50:26,464 INFO L226 Difference]: Without dead ends: 21675 [2023-04-03 02:50:26,472 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=389, Invalid=1333, Unknown=0, NotChecked=0, Total=1722 [2023-04-03 02:50:26,472 INFO L413 NwaCegarLoop]: 221 mSDtfsCounter, 1507 mSDsluCounter, 1746 mSDsCounter, 0 mSdLazyCounter, 2311 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1507 SdHoareTripleChecker+Valid, 1967 SdHoareTripleChecker+Invalid, 2345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 2311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:50:26,472 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1507 Valid, 1967 Invalid, 2345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 2311 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-04-03 02:50:26,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21675 states. [2023-04-03 02:50:28,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21675 to 18267. [2023-04-03 02:50:28,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18267 states, 18263 states have (on average 1.4431911515085145) internal successors, (26357), 18263 states have internal predecessors, (26357), 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) [2023-04-03 02:50:28,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18267 states to 18267 states and 26360 transitions. [2023-04-03 02:50:28,735 INFO L78 Accepts]: Start accepts. Automaton has 18267 states and 26360 transitions. Word has length 76 [2023-04-03 02:50:28,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:50:28,736 INFO L495 AbstractCegarLoop]: Abstraction has 18267 states and 26360 transitions. [2023-04-03 02:50:28,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 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) [2023-04-03 02:50:28,736 INFO L276 IsEmpty]: Start isEmpty. Operand 18267 states and 26360 transitions. [2023-04-03 02:50:28,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-04-03 02:50:28,739 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:50:28,739 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] [2023-04-03 02:50:28,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-04-03 02:50:28,739 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:50:28,739 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:50:28,739 INFO L85 PathProgramCache]: Analyzing trace with hash -162322125, now seen corresponding path program 1 times [2023-04-03 02:50:28,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:50:28,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447790700] [2023-04-03 02:50:28,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:50:28,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:50:28,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:50:29,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:50:29,788 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:50:29,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447790700] [2023-04-03 02:50:29,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447790700] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:50:29,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:50:29,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2023-04-03 02:50:29,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007258020] [2023-04-03 02:50:29,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:50:29,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-04-03 02:50:29,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:50:29,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-04-03 02:50:29,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2023-04-03 02:50:29,789 INFO L87 Difference]: Start difference. First operand 18267 states and 26360 transitions. Second operand has 20 states, 20 states have (on average 3.65) internal successors, (73), 20 states have internal predecessors, (73), 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) [2023-04-03 02:50:36,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:50:36,270 INFO L93 Difference]: Finished difference Result 39364 states and 56845 transitions. [2023-04-03 02:50:36,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-04-03 02:50:36,271 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.65) internal successors, (73), 20 states have internal predecessors, (73), 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 76 [2023-04-03 02:50:36,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:50:36,330 INFO L225 Difference]: With dead ends: 39364 [2023-04-03 02:50:36,331 INFO L226 Difference]: Without dead ends: 39362 [2023-04-03 02:50:36,341 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=353, Invalid=979, Unknown=0, NotChecked=0, Total=1332 [2023-04-03 02:50:36,342 INFO L413 NwaCegarLoop]: 281 mSDtfsCounter, 1158 mSDsluCounter, 1823 mSDsCounter, 0 mSdLazyCounter, 1216 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1158 SdHoareTripleChecker+Valid, 2104 SdHoareTripleChecker+Invalid, 1247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-03 02:50:36,342 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1158 Valid, 2104 Invalid, 1247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1216 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-03 02:50:36,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39362 states. [2023-04-03 02:50:38,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39362 to 18275. [2023-04-03 02:50:38,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18275 states, 18271 states have (on average 1.4431612938536478) internal successors, (26368), 18271 states have internal predecessors, (26368), 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) [2023-04-03 02:50:39,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18275 states to 18275 states and 26371 transitions. [2023-04-03 02:50:39,010 INFO L78 Accepts]: Start accepts. Automaton has 18275 states and 26371 transitions. Word has length 76 [2023-04-03 02:50:39,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:50:39,010 INFO L495 AbstractCegarLoop]: Abstraction has 18275 states and 26371 transitions. [2023-04-03 02:50:39,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.65) internal successors, (73), 20 states have internal predecessors, (73), 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) [2023-04-03 02:50:39,011 INFO L276 IsEmpty]: Start isEmpty. Operand 18275 states and 26371 transitions. [2023-04-03 02:50:39,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-04-03 02:50:39,012 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:50:39,013 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] [2023-04-03 02:50:39,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-04-03 02:50:39,013 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:50:39,013 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:50:39,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1447407501, now seen corresponding path program 1 times [2023-04-03 02:50:39,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:50:39,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054054313] [2023-04-03 02:50:39,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:50:39,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:50:39,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:50:39,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:50:39,973 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:50:39,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054054313] [2023-04-03 02:50:39,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054054313] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:50:39,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:50:39,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2023-04-03 02:50:39,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986840080] [2023-04-03 02:50:39,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:50:39,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-04-03 02:50:39,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:50:39,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-04-03 02:50:39,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2023-04-03 02:50:39,974 INFO L87 Difference]: Start difference. First operand 18275 states and 26371 transitions. Second operand has 22 states, 22 states have (on average 3.3181818181818183) internal successors, (73), 21 states have internal predecessors, (73), 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) [2023-04-03 02:50:45,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:50:45,633 INFO L93 Difference]: Finished difference Result 30763 states and 44322 transitions. [2023-04-03 02:50:45,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-04-03 02:50:45,633 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.3181818181818183) internal successors, (73), 21 states have internal predecessors, (73), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2023-04-03 02:50:45,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:50:45,674 INFO L225 Difference]: With dead ends: 30763 [2023-04-03 02:50:45,675 INFO L226 Difference]: Without dead ends: 30761 [2023-04-03 02:50:45,685 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=378, Invalid=1262, Unknown=0, NotChecked=0, Total=1640 [2023-04-03 02:50:45,685 INFO L413 NwaCegarLoop]: 236 mSDtfsCounter, 1418 mSDsluCounter, 1932 mSDsCounter, 0 mSdLazyCounter, 2335 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1418 SdHoareTripleChecker+Valid, 2168 SdHoareTripleChecker+Invalid, 2364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 2335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:50:45,685 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1418 Valid, 2168 Invalid, 2364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 2335 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-04-03 02:50:45,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30761 states. [2023-04-03 02:50:48,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30761 to 18281. [2023-04-03 02:50:48,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18281 states, 18277 states have (on average 1.443125239371888) internal successors, (26376), 18277 states have internal predecessors, (26376), 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) [2023-04-03 02:50:48,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18281 states to 18281 states and 26379 transitions. [2023-04-03 02:50:48,333 INFO L78 Accepts]: Start accepts. Automaton has 18281 states and 26379 transitions. Word has length 76 [2023-04-03 02:50:48,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:50:48,333 INFO L495 AbstractCegarLoop]: Abstraction has 18281 states and 26379 transitions. [2023-04-03 02:50:48,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.3181818181818183) internal successors, (73), 21 states have internal predecessors, (73), 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) [2023-04-03 02:50:48,333 INFO L276 IsEmpty]: Start isEmpty. Operand 18281 states and 26379 transitions. [2023-04-03 02:50:48,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-04-03 02:50:48,334 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:50:48,334 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] [2023-04-03 02:50:48,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-04-03 02:50:48,335 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:50:48,335 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:50:48,335 INFO L85 PathProgramCache]: Analyzing trace with hash -164264941, now seen corresponding path program 1 times [2023-04-03 02:50:48,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:50:48,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430978249] [2023-04-03 02:50:48,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:50:48,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:50:48,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:50:49,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:50:49,320 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:50:49,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430978249] [2023-04-03 02:50:49,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430978249] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:50:49,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:50:49,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2023-04-03 02:50:49,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79207475] [2023-04-03 02:50:49,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:50:49,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-04-03 02:50:49,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:50:49,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-04-03 02:50:49,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2023-04-03 02:50:49,321 INFO L87 Difference]: Start difference. First operand 18281 states and 26379 transitions. Second operand has 20 states, 20 states have (on average 3.65) internal successors, (73), 20 states have internal predecessors, (73), 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) [2023-04-03 02:50:55,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:50:55,867 INFO L93 Difference]: Finished difference Result 35138 states and 50689 transitions. [2023-04-03 02:50:55,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-04-03 02:50:55,867 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.65) internal successors, (73), 20 states have internal predecessors, (73), 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 76 [2023-04-03 02:50:55,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:50:55,912 INFO L225 Difference]: With dead ends: 35138 [2023-04-03 02:50:55,912 INFO L226 Difference]: Without dead ends: 35136 [2023-04-03 02:50:55,920 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=357, Invalid=975, Unknown=0, NotChecked=0, Total=1332 [2023-04-03 02:50:55,920 INFO L413 NwaCegarLoop]: 376 mSDtfsCounter, 869 mSDsluCounter, 1518 mSDsCounter, 0 mSdLazyCounter, 1219 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 869 SdHoareTripleChecker+Valid, 1894 SdHoareTripleChecker+Invalid, 1251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-03 02:50:55,921 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [869 Valid, 1894 Invalid, 1251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1219 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-03 02:50:55,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35136 states. [2023-04-03 02:50:58,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35136 to 18270. [2023-04-03 02:50:58,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18270 states, 18266 states have (on average 1.4431731085076098) internal successors, (26361), 18266 states have internal predecessors, (26361), 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) [2023-04-03 02:50:58,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18270 states to 18270 states and 26364 transitions. [2023-04-03 02:50:58,792 INFO L78 Accepts]: Start accepts. Automaton has 18270 states and 26364 transitions. Word has length 76 [2023-04-03 02:50:58,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:50:58,792 INFO L495 AbstractCegarLoop]: Abstraction has 18270 states and 26364 transitions. [2023-04-03 02:50:58,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.65) internal successors, (73), 20 states have internal predecessors, (73), 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) [2023-04-03 02:50:58,793 INFO L276 IsEmpty]: Start isEmpty. Operand 18270 states and 26364 transitions. [2023-04-03 02:50:58,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-04-03 02:50:58,794 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:50:58,794 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] [2023-04-03 02:50:58,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-04-03 02:50:58,794 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:50:58,794 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:50:58,794 INFO L85 PathProgramCache]: Analyzing trace with hash -830159277, now seen corresponding path program 1 times [2023-04-03 02:50:58,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:50:58,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275427066] [2023-04-03 02:50:58,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:50:58,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:50:58,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:50:59,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:50:59,768 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:50:59,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275427066] [2023-04-03 02:50:59,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275427066] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:50:59,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:50:59,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2023-04-03 02:50:59,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718063244] [2023-04-03 02:50:59,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:50:59,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-04-03 02:50:59,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:50:59,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-04-03 02:50:59,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2023-04-03 02:50:59,769 INFO L87 Difference]: Start difference. First operand 18270 states and 26364 transitions. Second operand has 19 states, 19 states have (on average 3.8421052631578947) internal successors, (73), 19 states have internal predecessors, (73), 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) [2023-04-03 02:51:04,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:51:04,262 INFO L93 Difference]: Finished difference Result 23575 states and 33885 transitions. [2023-04-03 02:51:04,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-04-03 02:51:04,263 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.8421052631578947) internal successors, (73), 19 states have internal predecessors, (73), 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 76 [2023-04-03 02:51:04,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:51:04,290 INFO L225 Difference]: With dead ends: 23575 [2023-04-03 02:51:04,290 INFO L226 Difference]: Without dead ends: 23573 [2023-04-03 02:51:04,295 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=245, Invalid=747, Unknown=0, NotChecked=0, Total=992 [2023-04-03 02:51:04,296 INFO L413 NwaCegarLoop]: 424 mSDtfsCounter, 808 mSDsluCounter, 3406 mSDsCounter, 0 mSdLazyCounter, 1172 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 808 SdHoareTripleChecker+Valid, 3830 SdHoareTripleChecker+Invalid, 1194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-03 02:51:04,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [808 Valid, 3830 Invalid, 1194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1172 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-03 02:51:04,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23573 states. [2023-04-03 02:51:07,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23573 to 19299. [2023-04-03 02:51:07,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19299 states, 19295 states have (on average 1.4411505571391552) internal successors, (27807), 19295 states have internal predecessors, (27807), 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) [2023-04-03 02:51:07,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19299 states to 19299 states and 27810 transitions. [2023-04-03 02:51:07,429 INFO L78 Accepts]: Start accepts. Automaton has 19299 states and 27810 transitions. Word has length 76 [2023-04-03 02:51:07,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:51:07,429 INFO L495 AbstractCegarLoop]: Abstraction has 19299 states and 27810 transitions. [2023-04-03 02:51:07,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.8421052631578947) internal successors, (73), 19 states have internal predecessors, (73), 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) [2023-04-03 02:51:07,429 INFO L276 IsEmpty]: Start isEmpty. Operand 19299 states and 27810 transitions. [2023-04-03 02:51:07,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-04-03 02:51:07,430 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:51:07,430 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] [2023-04-03 02:51:07,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-04-03 02:51:07,430 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:51:07,431 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:51:07,431 INFO L85 PathProgramCache]: Analyzing trace with hash 1860011411, now seen corresponding path program 1 times [2023-04-03 02:51:07,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:51:07,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282309440] [2023-04-03 02:51:07,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:51:07,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:51:07,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:51:08,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:51:08,296 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:51:08,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282309440] [2023-04-03 02:51:08,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282309440] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:51:08,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:51:08,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2023-04-03 02:51:08,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515002160] [2023-04-03 02:51:08,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:51:08,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-04-03 02:51:08,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:51:08,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-04-03 02:51:08,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2023-04-03 02:51:08,298 INFO L87 Difference]: Start difference. First operand 19299 states and 27810 transitions. Second operand has 19 states, 19 states have (on average 3.8421052631578947) internal successors, (73), 19 states have internal predecessors, (73), 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) [2023-04-03 02:51:12,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:51:12,673 INFO L93 Difference]: Finished difference Result 26608 states and 38251 transitions. [2023-04-03 02:51:12,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-04-03 02:51:12,674 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.8421052631578947) internal successors, (73), 19 states have internal predecessors, (73), 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 76 [2023-04-03 02:51:12,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:51:12,705 INFO L225 Difference]: With dead ends: 26608 [2023-04-03 02:51:12,705 INFO L226 Difference]: Without dead ends: 24558 [2023-04-03 02:51:12,713 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=255, Invalid=737, Unknown=0, NotChecked=0, Total=992 [2023-04-03 02:51:12,719 INFO L413 NwaCegarLoop]: 357 mSDtfsCounter, 1029 mSDsluCounter, 2125 mSDsCounter, 0 mSdLazyCounter, 793 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1029 SdHoareTripleChecker+Valid, 2482 SdHoareTripleChecker+Invalid, 825 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 793 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-03 02:51:12,721 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1029 Valid, 2482 Invalid, 825 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 793 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-03 02:51:12,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24558 states. [2023-04-03 02:51:15,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24558 to 19308. [2023-04-03 02:51:15,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19308 states, 19304 states have (on average 1.4409966846249482) internal successors, (27817), 19304 states have internal predecessors, (27817), 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) [2023-04-03 02:51:15,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19308 states to 19308 states and 27820 transitions. [2023-04-03 02:51:15,931 INFO L78 Accepts]: Start accepts. Automaton has 19308 states and 27820 transitions. Word has length 76 [2023-04-03 02:51:15,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:51:15,931 INFO L495 AbstractCegarLoop]: Abstraction has 19308 states and 27820 transitions. [2023-04-03 02:51:15,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.8421052631578947) internal successors, (73), 19 states have internal predecessors, (73), 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) [2023-04-03 02:51:15,932 INFO L276 IsEmpty]: Start isEmpty. Operand 19308 states and 27820 transitions. [2023-04-03 02:51:15,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-04-03 02:51:15,933 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:51:15,933 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] [2023-04-03 02:51:15,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-04-03 02:51:15,933 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:51:15,934 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:51:15,934 INFO L85 PathProgramCache]: Analyzing trace with hash 1945752051, now seen corresponding path program 1 times [2023-04-03 02:51:15,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:51:15,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206617914] [2023-04-03 02:51:15,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:51:15,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:51:15,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:51:16,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:51:16,722 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:51:16,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206617914] [2023-04-03 02:51:16,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206617914] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:51:16,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:51:16,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2023-04-03 02:51:16,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834573024] [2023-04-03 02:51:16,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:51:16,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-04-03 02:51:16,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:51:16,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-04-03 02:51:16,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2023-04-03 02:51:16,723 INFO L87 Difference]: Start difference. First operand 19308 states and 27820 transitions. Second operand has 19 states, 19 states have (on average 3.8421052631578947) internal successors, (73), 19 states have internal predecessors, (73), 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) [2023-04-03 02:51:22,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:51:22,881 INFO L93 Difference]: Finished difference Result 32813 states and 47194 transitions. [2023-04-03 02:51:22,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-04-03 02:51:22,881 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.8421052631578947) internal successors, (73), 19 states have internal predecessors, (73), 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 76 [2023-04-03 02:51:22,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:51:22,927 INFO L225 Difference]: With dead ends: 32813 [2023-04-03 02:51:22,927 INFO L226 Difference]: Without dead ends: 32811 [2023-04-03 02:51:22,935 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=254, Invalid=738, Unknown=0, NotChecked=0, Total=992 [2023-04-03 02:51:22,935 INFO L413 NwaCegarLoop]: 359 mSDtfsCounter, 1064 mSDsluCounter, 1851 mSDsCounter, 0 mSdLazyCounter, 903 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1064 SdHoareTripleChecker+Valid, 2210 SdHoareTripleChecker+Invalid, 929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 903 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-03 02:51:22,935 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1064 Valid, 2210 Invalid, 929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 903 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-03 02:51:22,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32811 states. [2023-04-03 02:51:26,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32811 to 19323. [2023-04-03 02:51:26,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19323 states, 19319 states have (on average 1.4409130907396863) internal successors, (27837), 19319 states have internal predecessors, (27837), 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) [2023-04-03 02:51:26,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19323 states to 19323 states and 27840 transitions. [2023-04-03 02:51:26,302 INFO L78 Accepts]: Start accepts. Automaton has 19323 states and 27840 transitions. Word has length 76 [2023-04-03 02:51:26,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:51:26,302 INFO L495 AbstractCegarLoop]: Abstraction has 19323 states and 27840 transitions. [2023-04-03 02:51:26,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.8421052631578947) internal successors, (73), 19 states have internal predecessors, (73), 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) [2023-04-03 02:51:26,302 INFO L276 IsEmpty]: Start isEmpty. Operand 19323 states and 27840 transitions. [2023-04-03 02:51:26,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-04-03 02:51:26,303 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:51:26,304 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] [2023-04-03 02:51:26,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-04-03 02:51:26,304 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:51:26,304 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:51:26,304 INFO L85 PathProgramCache]: Analyzing trace with hash -1990569677, now seen corresponding path program 1 times [2023-04-03 02:51:26,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:51:26,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714337393] [2023-04-03 02:51:26,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:51:26,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:51:26,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:51:27,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:51:27,063 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:51:27,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714337393] [2023-04-03 02:51:27,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714337393] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:51:27,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:51:27,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2023-04-03 02:51:27,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145915469] [2023-04-03 02:51:27,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:51:27,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-04-03 02:51:27,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:51:27,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-04-03 02:51:27,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2023-04-03 02:51:27,064 INFO L87 Difference]: Start difference. First operand 19323 states and 27840 transitions. Second operand has 19 states, 19 states have (on average 3.8421052631578947) internal successors, (73), 19 states have internal predecessors, (73), 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) [2023-04-03 02:51:33,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:51:33,761 INFO L93 Difference]: Finished difference Result 39106 states and 56296 transitions. [2023-04-03 02:51:33,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-04-03 02:51:33,761 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.8421052631578947) internal successors, (73), 19 states have internal predecessors, (73), 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 76 [2023-04-03 02:51:33,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:51:33,811 INFO L225 Difference]: With dead ends: 39106 [2023-04-03 02:51:33,812 INFO L226 Difference]: Without dead ends: 35008 [2023-04-03 02:51:33,827 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=234, Invalid=696, Unknown=0, NotChecked=0, Total=930 [2023-04-03 02:51:33,827 INFO L413 NwaCegarLoop]: 350 mSDtfsCounter, 1069 mSDsluCounter, 1079 mSDsCounter, 0 mSdLazyCounter, 658 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1069 SdHoareTripleChecker+Valid, 1429 SdHoareTripleChecker+Invalid, 694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 658 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-03 02:51:33,827 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1069 Valid, 1429 Invalid, 694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 658 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-03 02:51:33,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35008 states. [2023-04-03 02:51:38,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35008 to 22870. [2023-04-03 02:51:38,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22870 states, 22866 states have (on average 1.4385550599142831) internal successors, (32894), 22866 states have internal predecessors, (32894), 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) [2023-04-03 02:51:38,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22870 states to 22870 states and 32897 transitions. [2023-04-03 02:51:38,295 INFO L78 Accepts]: Start accepts. Automaton has 22870 states and 32897 transitions. Word has length 76 [2023-04-03 02:51:38,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:51:38,295 INFO L495 AbstractCegarLoop]: Abstraction has 22870 states and 32897 transitions. [2023-04-03 02:51:38,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.8421052631578947) internal successors, (73), 19 states have internal predecessors, (73), 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) [2023-04-03 02:51:38,295 INFO L276 IsEmpty]: Start isEmpty. Operand 22870 states and 32897 transitions. [2023-04-03 02:51:38,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-04-03 02:51:38,297 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:51:38,297 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] [2023-04-03 02:51:38,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-04-03 02:51:38,297 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:51:38,297 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:51:38,297 INFO L85 PathProgramCache]: Analyzing trace with hash -1904829037, now seen corresponding path program 1 times [2023-04-03 02:51:38,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:51:38,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454037492] [2023-04-03 02:51:38,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:51:38,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:51:38,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:51:39,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:51:39,193 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:51:39,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454037492] [2023-04-03 02:51:39,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454037492] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:51:39,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:51:39,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2023-04-03 02:51:39,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044974098] [2023-04-03 02:51:39,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:51:39,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-04-03 02:51:39,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:51:39,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-04-03 02:51:39,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2023-04-03 02:51:39,195 INFO L87 Difference]: Start difference. First operand 22870 states and 32897 transitions. Second operand has 19 states, 19 states have (on average 3.8421052631578947) internal successors, (73), 19 states have internal predecessors, (73), 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) [2023-04-03 02:51:47,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:51:47,186 INFO L93 Difference]: Finished difference Result 39969 states and 57413 transitions. [2023-04-03 02:51:47,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-04-03 02:51:47,187 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.8421052631578947) internal successors, (73), 19 states have internal predecessors, (73), 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 76 [2023-04-03 02:51:47,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:51:47,240 INFO L225 Difference]: With dead ends: 39969 [2023-04-03 02:51:47,240 INFO L226 Difference]: Without dead ends: 39967 [2023-04-03 02:51:47,250 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=259, Invalid=733, Unknown=0, NotChecked=0, Total=992 [2023-04-03 02:51:47,251 INFO L413 NwaCegarLoop]: 359 mSDtfsCounter, 1170 mSDsluCounter, 2578 mSDsCounter, 0 mSdLazyCounter, 1055 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1170 SdHoareTripleChecker+Valid, 2937 SdHoareTripleChecker+Invalid, 1087 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1055 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-03 02:51:47,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1170 Valid, 2937 Invalid, 1087 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1055 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-03 02:51:47,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39967 states. [2023-04-03 02:51:51,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39967 to 22884. [2023-04-03 02:51:51,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22884 states, 22880 states have (on average 1.4384615384615385) internal successors, (32912), 22880 states have internal predecessors, (32912), 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) [2023-04-03 02:51:51,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22884 states to 22884 states and 32915 transitions. [2023-04-03 02:51:51,731 INFO L78 Accepts]: Start accepts. Automaton has 22884 states and 32915 transitions. Word has length 76 [2023-04-03 02:51:51,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:51:51,731 INFO L495 AbstractCegarLoop]: Abstraction has 22884 states and 32915 transitions. [2023-04-03 02:51:51,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.8421052631578947) internal successors, (73), 19 states have internal predecessors, (73), 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) [2023-04-03 02:51:51,732 INFO L276 IsEmpty]: Start isEmpty. Operand 22884 states and 32915 transitions. [2023-04-03 02:51:51,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-04-03 02:51:51,744 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:51:51,744 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] [2023-04-03 02:51:51,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-04-03 02:51:51,744 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:51:51,744 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:51:51,744 INFO L85 PathProgramCache]: Analyzing trace with hash 1105052883, now seen corresponding path program 1 times [2023-04-03 02:51:51,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:51:51,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189016980] [2023-04-03 02:51:51,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:51:51,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:51:51,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:51:52,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:51:52,557 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:51:52,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189016980] [2023-04-03 02:51:52,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189016980] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:51:52,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:51:52,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2023-04-03 02:51:52,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796104723] [2023-04-03 02:51:52,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:51:52,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-04-03 02:51:52,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:51:52,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-04-03 02:51:52,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2023-04-03 02:51:52,559 INFO L87 Difference]: Start difference. First operand 22884 states and 32915 transitions. Second operand has 19 states, 19 states have (on average 3.8421052631578947) internal successors, (73), 19 states have internal predecessors, (73), 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) [2023-04-03 02:52:00,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:52:00,109 INFO L93 Difference]: Finished difference Result 35417 states and 50905 transitions. [2023-04-03 02:52:00,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-04-03 02:52:00,110 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.8421052631578947) internal successors, (73), 19 states have internal predecessors, (73), 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 76 [2023-04-03 02:52:00,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:52:00,159 INFO L225 Difference]: With dead ends: 35417 [2023-04-03 02:52:00,159 INFO L226 Difference]: Without dead ends: 35415 [2023-04-03 02:52:00,169 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=317, Invalid=873, Unknown=0, NotChecked=0, Total=1190 [2023-04-03 02:52:00,169 INFO L413 NwaCegarLoop]: 369 mSDtfsCounter, 1216 mSDsluCounter, 2398 mSDsCounter, 0 mSdLazyCounter, 1002 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1216 SdHoareTripleChecker+Valid, 2767 SdHoareTripleChecker+Invalid, 1034 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1002 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-03 02:52:00,170 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1216 Valid, 2767 Invalid, 1034 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1002 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-03 02:52:00,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35415 states. [2023-04-03 02:52:04,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35415 to 22884. [2023-04-03 02:52:04,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22884 states, 22880 states have (on average 1.4384615384615385) internal successors, (32912), 22880 states have internal predecessors, (32912), 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) [2023-04-03 02:52:04,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22884 states to 22884 states and 32915 transitions. [2023-04-03 02:52:04,680 INFO L78 Accepts]: Start accepts. Automaton has 22884 states and 32915 transitions. Word has length 76 [2023-04-03 02:52:04,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:52:04,680 INFO L495 AbstractCegarLoop]: Abstraction has 22884 states and 32915 transitions. [2023-04-03 02:52:04,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.8421052631578947) internal successors, (73), 19 states have internal predecessors, (73), 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) [2023-04-03 02:52:04,681 INFO L276 IsEmpty]: Start isEmpty. Operand 22884 states and 32915 transitions. [2023-04-03 02:52:04,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-04-03 02:52:04,682 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:52:04,682 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] [2023-04-03 02:52:04,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-04-03 02:52:04,682 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:52:04,682 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:52:04,682 INFO L85 PathProgramCache]: Analyzing trace with hash 1595460962, now seen corresponding path program 1 times [2023-04-03 02:52:04,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:52:04,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913864423] [2023-04-03 02:52:04,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:52:04,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:52:04,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:52:04,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:52:04,711 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:52:04,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913864423] [2023-04-03 02:52:04,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913864423] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:52:04,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:52:04,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:52:04,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872180833] [2023-04-03 02:52:04,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:52:04,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:52:04,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:52:04,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:52:04,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:52:04,712 INFO L87 Difference]: Start difference. First operand 22884 states and 32915 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 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) [2023-04-03 02:52:09,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:52:09,150 INFO L93 Difference]: Finished difference Result 41319 states and 59562 transitions. [2023-04-03 02:52:09,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:52:09,151 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 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 77 [2023-04-03 02:52:09,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:52:09,177 INFO L225 Difference]: With dead ends: 41319 [2023-04-03 02:52:09,178 INFO L226 Difference]: Without dead ends: 22248 [2023-04-03 02:52:09,200 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 [2023-04-03 02:52:09,201 INFO L413 NwaCegarLoop]: 277 mSDtfsCounter, 144 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:52:09,201 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 384 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:52:09,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22248 states. [2023-04-03 02:52:13,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22248 to 22246. [2023-04-03 02:52:13,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22246 states, 22242 states have (on average 1.4366513802715584) internal successors, (31954), 22242 states have internal predecessors, (31954), 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) [2023-04-03 02:52:13,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22246 states to 22246 states and 31957 transitions. [2023-04-03 02:52:13,622 INFO L78 Accepts]: Start accepts. Automaton has 22246 states and 31957 transitions. Word has length 77 [2023-04-03 02:52:13,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:52:13,623 INFO L495 AbstractCegarLoop]: Abstraction has 22246 states and 31957 transitions. [2023-04-03 02:52:13,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 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) [2023-04-03 02:52:13,623 INFO L276 IsEmpty]: Start isEmpty. Operand 22246 states and 31957 transitions. [2023-04-03 02:52:13,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-04-03 02:52:13,624 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:52:13,624 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] [2023-04-03 02:52:13,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-04-03 02:52:13,624 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:52:13,624 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:52:13,625 INFO L85 PathProgramCache]: Analyzing trace with hash 1943328997, now seen corresponding path program 1 times [2023-04-03 02:52:13,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:52:13,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452568670] [2023-04-03 02:52:13,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:52:13,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:52:13,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:52:13,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:52:13,655 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:52:13,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452568670] [2023-04-03 02:52:13,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452568670] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:52:13,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:52:13,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:52:13,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092207863] [2023-04-03 02:52:13,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:52:13,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:52:13,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:52:13,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:52:13,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:52:13,656 INFO L87 Difference]: Start difference. First operand 22246 states and 31957 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 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) [2023-04-03 02:52:18,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:52:18,121 INFO L93 Difference]: Finished difference Result 42701 states and 61541 transitions. [2023-04-03 02:52:18,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:52:18,121 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 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 77 [2023-04-03 02:52:18,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:52:18,149 INFO L225 Difference]: With dead ends: 42701 [2023-04-03 02:52:18,149 INFO L226 Difference]: Without dead ends: 21713 [2023-04-03 02:52:18,171 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 [2023-04-03 02:52:18,172 INFO L413 NwaCegarLoop]: 263 mSDtfsCounter, 138 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:52:18,172 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 374 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:52:18,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21713 states. [2023-04-03 02:52:22,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21713 to 21597. [2023-04-03 02:52:22,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21597 states, 21593 states have (on average 1.4352799518362431) internal successors, (30992), 21593 states have internal predecessors, (30992), 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) [2023-04-03 02:52:22,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21597 states to 21597 states and 30995 transitions. [2023-04-03 02:52:22,505 INFO L78 Accepts]: Start accepts. Automaton has 21597 states and 30995 transitions. Word has length 77 [2023-04-03 02:52:22,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:52:22,505 INFO L495 AbstractCegarLoop]: Abstraction has 21597 states and 30995 transitions. [2023-04-03 02:52:22,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 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) [2023-04-03 02:52:22,506 INFO L276 IsEmpty]: Start isEmpty. Operand 21597 states and 30995 transitions. [2023-04-03 02:52:22,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-04-03 02:52:22,506 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:52:22,507 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] [2023-04-03 02:52:22,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-04-03 02:52:22,507 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:52:22,507 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:52:22,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1110163395, now seen corresponding path program 1 times [2023-04-03 02:52:22,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:52:22,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875647859] [2023-04-03 02:52:22,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:52:22,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:52:22,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:52:22,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:52:22,536 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:52:22,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875647859] [2023-04-03 02:52:22,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875647859] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:52:22,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:52:22,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:52:22,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010543167] [2023-04-03 02:52:22,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:52:22,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:52:22,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:52:22,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:52:22,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:52:22,537 INFO L87 Difference]: Start difference. First operand 21597 states and 30995 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 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) [2023-04-03 02:52:26,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:52:26,859 INFO L93 Difference]: Finished difference Result 38366 states and 55179 transitions. [2023-04-03 02:52:26,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:52:26,859 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 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 77 [2023-04-03 02:52:26,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:52:26,887 INFO L225 Difference]: With dead ends: 38366 [2023-04-03 02:52:26,887 INFO L226 Difference]: Without dead ends: 20843 [2023-04-03 02:52:26,904 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 [2023-04-03 02:52:26,905 INFO L413 NwaCegarLoop]: 269 mSDtfsCounter, 147 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:52:26,905 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 364 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:52:26,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20843 states. [2023-04-03 02:52:31,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20843 to 20841. [2023-04-03 02:52:31,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20841 states, 20837 states have (on average 1.4330757786629553) internal successors, (29861), 20837 states have internal predecessors, (29861), 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) [2023-04-03 02:52:31,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20841 states to 20841 states and 29864 transitions. [2023-04-03 02:52:31,222 INFO L78 Accepts]: Start accepts. Automaton has 20841 states and 29864 transitions. Word has length 77 [2023-04-03 02:52:31,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:52:31,222 INFO L495 AbstractCegarLoop]: Abstraction has 20841 states and 29864 transitions. [2023-04-03 02:52:31,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 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) [2023-04-03 02:52:31,222 INFO L276 IsEmpty]: Start isEmpty. Operand 20841 states and 29864 transitions. [2023-04-03 02:52:31,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-04-03 02:52:31,223 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:52:31,223 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] [2023-04-03 02:52:31,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-04-03 02:52:31,223 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:52:31,224 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:52:31,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1136687560, now seen corresponding path program 1 times [2023-04-03 02:52:31,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:52:31,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291997428] [2023-04-03 02:52:31,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:52:31,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:52:31,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:52:33,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:52:33,495 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:52:33,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291997428] [2023-04-03 02:52:33,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291997428] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:52:33,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:52:33,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2023-04-03 02:52:33,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964231752] [2023-04-03 02:52:33,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:52:33,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-04-03 02:52:33,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:52:33,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-04-03 02:52:33,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=586, Unknown=0, NotChecked=0, Total=702 [2023-04-03 02:52:33,497 INFO L87 Difference]: Start difference. First operand 20841 states and 29864 transitions. Second operand has 27 states, 27 states have (on average 2.7777777777777777) internal successors, (75), 27 states have internal predecessors, (75), 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) [2023-04-03 02:52:41,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:52:41,931 INFO L93 Difference]: Finished difference Result 25828 states and 36913 transitions. [2023-04-03 02:52:41,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-04-03 02:52:41,932 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.7777777777777777) internal successors, (75), 27 states have internal predecessors, (75), 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 78 [2023-04-03 02:52:41,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:52:41,968 INFO L225 Difference]: With dead ends: 25828 [2023-04-03 02:52:41,969 INFO L226 Difference]: Without dead ends: 25826 [2023-04-03 02:52:41,976 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=613, Invalid=2039, Unknown=0, NotChecked=0, Total=2652 [2023-04-03 02:52:41,978 INFO L413 NwaCegarLoop]: 411 mSDtfsCounter, 1220 mSDsluCounter, 4270 mSDsCounter, 0 mSdLazyCounter, 2225 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1220 SdHoareTripleChecker+Valid, 4681 SdHoareTripleChecker+Invalid, 2257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 2225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-04-03 02:52:41,979 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1220 Valid, 4681 Invalid, 2257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 2225 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-04-03 02:52:41,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25826 states. [2023-04-03 02:52:46,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25826 to 20849. [2023-04-03 02:52:46,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20849 states, 20845 states have (on average 1.4330534900455745) internal successors, (29872), 20845 states have internal predecessors, (29872), 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) [2023-04-03 02:52:46,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20849 states to 20849 states and 29875 transitions. [2023-04-03 02:52:46,502 INFO L78 Accepts]: Start accepts. Automaton has 20849 states and 29875 transitions. Word has length 78 [2023-04-03 02:52:46,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:52:46,502 INFO L495 AbstractCegarLoop]: Abstraction has 20849 states and 29875 transitions. [2023-04-03 02:52:46,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.7777777777777777) internal successors, (75), 27 states have internal predecessors, (75), 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) [2023-04-03 02:52:46,502 INFO L276 IsEmpty]: Start isEmpty. Operand 20849 states and 29875 transitions. [2023-04-03 02:52:46,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-04-03 02:52:46,503 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:52:46,503 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] [2023-04-03 02:52:46,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-04-03 02:52:46,503 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:52:46,504 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:52:46,504 INFO L85 PathProgramCache]: Analyzing trace with hash -468109048, now seen corresponding path program 1 times [2023-04-03 02:52:46,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:52:46,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026246175] [2023-04-03 02:52:46,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:52:46,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:52:46,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:52:47,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:52:47,404 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:52:47,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026246175] [2023-04-03 02:52:47,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026246175] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:52:47,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:52:47,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2023-04-03 02:52:47,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500387661] [2023-04-03 02:52:47,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:52:47,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-04-03 02:52:47,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:52:47,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-04-03 02:52:47,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2023-04-03 02:52:47,406 INFO L87 Difference]: Start difference. First operand 20849 states and 29875 transitions. Second operand has 20 states, 20 states have (on average 3.75) internal successors, (75), 20 states have internal predecessors, (75), 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) [2023-04-03 02:52:53,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:52:53,498 INFO L93 Difference]: Finished difference Result 27705 states and 39633 transitions. [2023-04-03 02:52:53,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-04-03 02:52:53,499 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.75) internal successors, (75), 20 states have internal predecessors, (75), 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 78 [2023-04-03 02:52:53,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:52:53,534 INFO L225 Difference]: With dead ends: 27705 [2023-04-03 02:52:53,534 INFO L226 Difference]: Without dead ends: 25783 [2023-04-03 02:52:53,543 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=289, Invalid=833, Unknown=0, NotChecked=0, Total=1122 [2023-04-03 02:52:53,544 INFO L413 NwaCegarLoop]: 340 mSDtfsCounter, 749 mSDsluCounter, 1125 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 749 SdHoareTripleChecker+Valid, 1465 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-03 02:52:53,545 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [749 Valid, 1465 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 385 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-03 02:52:53,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25783 states. [2023-04-03 02:52:58,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25783 to 20861. [2023-04-03 02:52:58,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20861 states, 20857 states have (on average 1.4329002253440093) internal successors, (29886), 20857 states have internal predecessors, (29886), 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) [2023-04-03 02:52:58,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20861 states to 20861 states and 29889 transitions. [2023-04-03 02:52:58,129 INFO L78 Accepts]: Start accepts. Automaton has 20861 states and 29889 transitions. Word has length 78 [2023-04-03 02:52:58,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:52:58,129 INFO L495 AbstractCegarLoop]: Abstraction has 20861 states and 29889 transitions. [2023-04-03 02:52:58,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.75) internal successors, (75), 20 states have internal predecessors, (75), 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) [2023-04-03 02:52:58,129 INFO L276 IsEmpty]: Start isEmpty. Operand 20861 states and 29889 transitions. [2023-04-03 02:52:58,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-04-03 02:52:58,130 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:52:58,130 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] [2023-04-03 02:52:58,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-04-03 02:52:58,130 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:52:58,130 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:52:58,131 INFO L85 PathProgramCache]: Analyzing trace with hash -382368408, now seen corresponding path program 1 times [2023-04-03 02:52:58,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:52:58,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959520483] [2023-04-03 02:52:58,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:52:58,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:52:58,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:52:59,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:52:59,569 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:52:59,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959520483] [2023-04-03 02:52:59,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959520483] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:52:59,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:52:59,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2023-04-03 02:52:59,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471032558] [2023-04-03 02:52:59,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:52:59,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-04-03 02:52:59,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:52:59,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-04-03 02:52:59,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2023-04-03 02:52:59,570 INFO L87 Difference]: Start difference. First operand 20861 states and 29889 transitions. Second operand has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 25 states have internal predecessors, (75), 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) [2023-04-03 02:53:08,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:53:08,345 INFO L93 Difference]: Finished difference Result 29910 states and 42771 transitions. [2023-04-03 02:53:08,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-04-03 02:53:08,345 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 25 states have internal predecessors, (75), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2023-04-03 02:53:08,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:53:08,395 INFO L225 Difference]: With dead ends: 29910 [2023-04-03 02:53:08,395 INFO L226 Difference]: Without dead ends: 29908 [2023-04-03 02:53:08,403 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=494, Invalid=1668, Unknown=0, NotChecked=0, Total=2162 [2023-04-03 02:53:08,403 INFO L413 NwaCegarLoop]: 235 mSDtfsCounter, 1347 mSDsluCounter, 1420 mSDsCounter, 0 mSdLazyCounter, 1948 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1347 SdHoareTripleChecker+Valid, 1655 SdHoareTripleChecker+Invalid, 1987 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1948 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:53:08,403 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1347 Valid, 1655 Invalid, 1987 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1948 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-04-03 02:53:08,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29908 states. [2023-04-03 02:53:13,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29908 to 20855. [2023-04-03 02:53:13,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20855 states, 20851 states have (on average 1.4329768356433745) internal successors, (29879), 20851 states have internal predecessors, (29879), 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) [2023-04-03 02:53:13,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20855 states to 20855 states and 29882 transitions. [2023-04-03 02:53:13,164 INFO L78 Accepts]: Start accepts. Automaton has 20855 states and 29882 transitions. Word has length 78 [2023-04-03 02:53:13,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:53:13,165 INFO L495 AbstractCegarLoop]: Abstraction has 20855 states and 29882 transitions. [2023-04-03 02:53:13,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 25 states have internal predecessors, (75), 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) [2023-04-03 02:53:13,165 INFO L276 IsEmpty]: Start isEmpty. Operand 20855 states and 29882 transitions. [2023-04-03 02:53:13,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-04-03 02:53:13,166 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:53:13,166 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] [2023-04-03 02:53:13,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-04-03 02:53:13,166 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:53:13,166 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:53:13,166 INFO L85 PathProgramCache]: Analyzing trace with hash -23722840, now seen corresponding path program 1 times [2023-04-03 02:53:13,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:53:13,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305288214] [2023-04-03 02:53:13,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:53:13,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:53:13,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:53:14,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:53:14,499 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:53:14,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305288214] [2023-04-03 02:53:14,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305288214] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:53:14,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:53:14,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2023-04-03 02:53:14,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158635928] [2023-04-03 02:53:14,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:53:14,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-04-03 02:53:14,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:53:14,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-04-03 02:53:14,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2023-04-03 02:53:14,501 INFO L87 Difference]: Start difference. First operand 20855 states and 29882 transitions. Second operand has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 25 states have internal predecessors, (75), 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) [2023-04-03 02:53:24,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:53:24,938 INFO L93 Difference]: Finished difference Result 37207 states and 53323 transitions. [2023-04-03 02:53:24,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-04-03 02:53:24,938 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 25 states have internal predecessors, (75), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2023-04-03 02:53:24,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:53:24,982 INFO L225 Difference]: With dead ends: 37207 [2023-04-03 02:53:24,983 INFO L226 Difference]: Without dead ends: 33365 [2023-04-03 02:53:24,992 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=510, Invalid=1746, Unknown=0, NotChecked=0, Total=2256 [2023-04-03 02:53:24,992 INFO L413 NwaCegarLoop]: 239 mSDtfsCounter, 1031 mSDsluCounter, 2679 mSDsCounter, 0 mSdLazyCounter, 3371 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1031 SdHoareTripleChecker+Valid, 2918 SdHoareTripleChecker+Invalid, 3406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 3371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-04-03 02:53:24,993 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1031 Valid, 2918 Invalid, 3406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 3371 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-04-03 02:53:25,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33365 states. [2023-04-03 02:53:30,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33365 to 20862. [2023-04-03 02:53:30,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20862 states, 20858 states have (on average 1.4329274139418928) internal successors, (29888), 20858 states have internal predecessors, (29888), 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) [2023-04-03 02:53:30,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20862 states to 20862 states and 29891 transitions. [2023-04-03 02:53:30,093 INFO L78 Accepts]: Start accepts. Automaton has 20862 states and 29891 transitions. Word has length 78 [2023-04-03 02:53:30,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:53:30,093 INFO L495 AbstractCegarLoop]: Abstraction has 20862 states and 29891 transitions. [2023-04-03 02:53:30,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 25 states have internal predecessors, (75), 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) [2023-04-03 02:53:30,093 INFO L276 IsEmpty]: Start isEmpty. Operand 20862 states and 29891 transitions. [2023-04-03 02:53:30,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-04-03 02:53:30,094 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:53:30,094 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] [2023-04-03 02:53:30,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-04-03 02:53:30,094 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:53:30,095 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:53:30,095 INFO L85 PathProgramCache]: Analyzing trace with hash 62017800, now seen corresponding path program 1 times [2023-04-03 02:53:30,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:53:30,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922297178] [2023-04-03 02:53:30,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:53:30,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:53:30,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:53:32,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:53:32,588 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:53:32,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922297178] [2023-04-03 02:53:32,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922297178] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:53:32,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:53:32,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2023-04-03 02:53:32,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035805914] [2023-04-03 02:53:32,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:53:32,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-04-03 02:53:32,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:53:32,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-04-03 02:53:32,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=724, Unknown=0, NotChecked=0, Total=870 [2023-04-03 02:53:32,590 INFO L87 Difference]: Start difference. First operand 20862 states and 29891 transitions. Second operand has 30 states, 30 states have (on average 2.5) internal successors, (75), 29 states have internal predecessors, (75), 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) [2023-04-03 02:53:41,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:53:41,434 INFO L93 Difference]: Finished difference Result 24037 states and 34344 transitions. [2023-04-03 02:53:41,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-04-03 02:53:41,435 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.5) internal successors, (75), 29 states have internal predecessors, (75), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2023-04-03 02:53:41,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:53:41,465 INFO L225 Difference]: With dead ends: 24037 [2023-04-03 02:53:41,466 INFO L226 Difference]: Without dead ends: 24035 [2023-04-03 02:53:41,473 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 672 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=767, Invalid=2313, Unknown=0, NotChecked=0, Total=3080 [2023-04-03 02:53:41,474 INFO L413 NwaCegarLoop]: 227 mSDtfsCounter, 1233 mSDsluCounter, 1578 mSDsCounter, 0 mSdLazyCounter, 2301 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1233 SdHoareTripleChecker+Valid, 1805 SdHoareTripleChecker+Invalid, 2350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 2301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-04-03 02:53:41,474 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1233 Valid, 1805 Invalid, 2350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 2301 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-04-03 02:53:41,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24035 states. [2023-04-03 02:53:46,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24035 to 20865. [2023-04-03 02:53:46,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20865 states, 20861 states have (on average 1.4328651550740616) internal successors, (29891), 20861 states have internal predecessors, (29891), 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) [2023-04-03 02:53:46,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20865 states to 20865 states and 29894 transitions. [2023-04-03 02:53:46,534 INFO L78 Accepts]: Start accepts. Automaton has 20865 states and 29894 transitions. Word has length 78 [2023-04-03 02:53:46,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:53:46,534 INFO L495 AbstractCegarLoop]: Abstraction has 20865 states and 29894 transitions. [2023-04-03 02:53:46,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.5) internal successors, (75), 29 states have internal predecessors, (75), 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) [2023-04-03 02:53:46,534 INFO L276 IsEmpty]: Start isEmpty. Operand 20865 states and 29894 transitions. [2023-04-03 02:53:46,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-04-03 02:53:46,535 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:53:46,535 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] [2023-04-03 02:53:46,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2023-04-03 02:53:46,540 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:53:46,540 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:53:46,540 INFO L85 PathProgramCache]: Analyzing trace with hash -1223067576, now seen corresponding path program 1 times [2023-04-03 02:53:46,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:53:46,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135010802] [2023-04-03 02:53:46,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:53:46,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:53:46,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:53:48,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:53:48,356 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:53:48,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135010802] [2023-04-03 02:53:48,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135010802] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:53:48,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:53:48,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2023-04-03 02:53:48,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995030587] [2023-04-03 02:53:48,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:53:48,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-04-03 02:53:48,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:53:48,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-04-03 02:53:48,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2023-04-03 02:53:48,357 INFO L87 Difference]: Start difference. First operand 20865 states and 29894 transitions. Second operand has 27 states, 27 states have (on average 2.7777777777777777) internal successors, (75), 27 states have internal predecessors, (75), 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)