/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain EqDomain -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.1.ufo.UNBOUNDED.pals.c.p+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 12:45:15,759 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 12:45:15,761 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 12:45:15,793 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 12:45:15,794 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 12:45:15,795 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 12:45:15,796 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 12:45:15,805 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 12:45:15,807 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 12:45:15,807 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 12:45:15,808 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 12:45:15,811 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 12:45:15,811 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 12:45:15,812 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 12:45:15,813 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 12:45:15,814 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 12:45:15,815 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 12:45:15,815 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 12:45:15,817 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 12:45:15,818 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 12:45:15,819 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 12:45:15,826 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 12:45:15,827 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 12:45:15,827 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 12:45:15,830 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 12:45:15,831 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 12:45:15,831 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 12:45:15,831 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 12:45:15,832 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 12:45:15,833 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 12:45:15,833 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 12:45:15,833 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 12:45:15,834 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 12:45:15,835 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 12:45:15,835 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 12:45:15,836 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 12:45:15,836 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 12:45:15,836 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 12:45:15,836 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 12:45:15,837 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 12:45:15,838 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 12:45:15,839 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 12:45:15,866 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 12:45:15,866 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 12:45:15,867 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 12:45:15,867 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 12:45:15,868 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 12:45:15,868 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 12:45:15,868 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 12:45:15,868 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 12:45:15,868 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 12:45:15,868 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 12:45:15,869 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 12:45:15,869 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 12:45:15,869 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 12:45:15,869 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 12:45:15,869 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 12:45:15,870 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 12:45:15,870 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 12:45:15,870 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 12:45:15,870 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 12:45:15,871 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 12:45:15,871 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 12:45:15,871 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 12:45:15,871 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 12:45:15,871 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 12:45:15,871 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 12:45:15,872 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 12:45:15,872 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 12:45:15,872 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 12:45:15,872 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 12:45:15,872 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 12:45:15,872 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 12:45:15,872 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 12:45:15,872 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 12:45:15,873 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 12:45:15,873 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 12:45:15,873 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 12:45:15,873 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 12:45:15,873 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 12:45:15,873 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 12:45:15,873 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 12:45:15,873 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 12:45:15,874 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 12:45:16,118 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 12:45:16,137 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 12:45:16,139 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 12:45:16,141 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 12:45:16,141 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 12:45:16,142 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.1.ufo.UNBOUNDED.pals.c.p+lhb-reducer.c [2023-04-01 12:45:17,234 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 12:45:17,515 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 12:45:17,516 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.1.ufo.UNBOUNDED.pals.c.p+lhb-reducer.c [2023-04-01 12:45:17,538 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ff593231f/c558418f087e4623932db06d05ad3d0e/FLAG568474335 [2023-04-01 12:45:17,552 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ff593231f/c558418f087e4623932db06d05ad3d0e [2023-04-01 12:45:17,554 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 12:45:17,556 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 12:45:17,561 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 12:45:17,561 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 12:45:17,564 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 12:45:17,565 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:45:17" (1/1) ... [2023-04-01 12:45:17,566 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73a70e50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:45:17, skipping insertion in model container [2023-04-01 12:45:17,566 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:45:17" (1/1) ... [2023-04-01 12:45:17,572 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 12:45:17,624 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 12:45:17,868 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.1.ufo.UNBOUNDED.pals.c.p+lhb-reducer.c[13904,13917] [2023-04-01 12:45:17,944 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 12:45:17,977 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 12:45:18,138 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.1.ufo.UNBOUNDED.pals.c.p+lhb-reducer.c[13904,13917] [2023-04-01 12:45:18,227 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 12:45:18,246 INFO L208 MainTranslator]: Completed translation [2023-04-01 12:45:18,246 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:45:18 WrapperNode [2023-04-01 12:45:18,246 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 12:45:18,247 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 12:45:18,247 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 12:45:18,247 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 12:45:18,257 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:45:18" (1/1) ... [2023-04-01 12:45:18,257 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:45:18" (1/1) ... [2023-04-01 12:45:18,269 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:45:18" (1/1) ... [2023-04-01 12:45:18,270 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:45:18" (1/1) ... [2023-04-01 12:45:18,289 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:45:18" (1/1) ... [2023-04-01 12:45:18,300 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:45:18" (1/1) ... [2023-04-01 12:45:18,304 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:45:18" (1/1) ... [2023-04-01 12:45:18,307 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:45:18" (1/1) ... [2023-04-01 12:45:18,311 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 12:45:18,312 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 12:45:18,312 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 12:45:18,312 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 12:45:18,313 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:45:18" (1/1) ... [2023-04-01 12:45:18,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 12:45:18,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 12:45:18,343 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 12:45:18,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 12:45:18,393 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 12:45:18,394 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 12:45:18,394 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 12:45:18,394 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 12:45:18,394 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 12:45:18,394 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 12:45:18,394 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 12:45:18,394 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 12:45:18,394 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 12:45:18,394 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-01 12:45:18,395 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-01 12:45:18,395 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2023-04-01 12:45:18,395 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-01 12:45:18,395 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 12:45:18,395 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-01 12:45:18,395 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-01 12:45:18,396 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-01 12:45:18,396 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-01 12:45:18,396 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-01 12:45:18,396 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2023-04-01 12:45:18,396 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2023-04-01 12:45:18,396 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-01 12:45:18,396 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-01 12:45:18,396 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 12:45:18,396 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 12:45:18,396 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 12:45:18,397 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 12:45:18,397 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 12:45:18,397 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 12:45:18,397 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 12:45:18,556 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 12:45:18,558 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 12:45:19,375 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 12:45:19,723 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 12:45:19,723 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-01 12:45:19,728 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:45:19 BoogieIcfgContainer [2023-04-01 12:45:19,729 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 12:45:19,731 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 12:45:19,731 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 12:45:19,734 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 12:45:19,734 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 12:45:17" (1/3) ... [2023-04-01 12:45:19,735 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b6ceef1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:45:19, skipping insertion in model container [2023-04-01 12:45:19,735 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:45:18" (2/3) ... [2023-04-01 12:45:19,735 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b6ceef1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:45:19, skipping insertion in model container [2023-04-01 12:45:19,735 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:45:19" (3/3) ... [2023-04-01 12:45:19,737 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr.5.1.ufo.UNBOUNDED.pals.c.p+lhb-reducer.c [2023-04-01 12:45:19,753 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 12:45:19,753 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 12:45:19,819 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 12:45:19,825 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;@5456af, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 12:45:19,826 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 12:45:19,834 INFO L276 IsEmpty]: Start isEmpty. Operand has 259 states, 219 states have (on average 1.6073059360730593) internal successors, (352), 254 states have internal predecessors, (352), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 12:45:19,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-04-01 12:45:19,857 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:45:19,858 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] [2023-04-01 12:45:19,859 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:45:19,862 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:45:19,863 INFO L85 PathProgramCache]: Analyzing trace with hash -353991477, now seen corresponding path program 1 times [2023-04-01 12:45:19,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:45:19,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872450294] [2023-04-01 12:45:19,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:45:19,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:45:20,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:45:20,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:45:20,437 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:45:20,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872450294] [2023-04-01 12:45:20,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872450294] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:45:20,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:45:20,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 12:45:20,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973356079] [2023-04-01 12:45:20,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:45:20,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 12:45:20,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:45:20,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 12:45:20,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 12:45:20,488 INFO L87 Difference]: Start difference. First operand has 259 states, 219 states have (on average 1.6073059360730593) internal successors, (352), 254 states have internal predecessors, (352), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:45:20,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:45:20,716 INFO L93 Difference]: Finished difference Result 455 states and 647 transitions. [2023-04-01 12:45:20,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 12:45:20,718 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 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 75 [2023-04-01 12:45:20,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:45:20,728 INFO L225 Difference]: With dead ends: 455 [2023-04-01 12:45:20,729 INFO L226 Difference]: Without dead ends: 221 [2023-04-01 12:45:20,734 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-01 12:45:20,742 INFO L413 NwaCegarLoop]: 322 mSDtfsCounter, 288 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 679 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:45:20,743 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [288 Valid, 679 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:45:20,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2023-04-01 12:45:20,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 221. [2023-04-01 12:45:20,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 217 states have (on average 1.4193548387096775) internal successors, (308), 217 states have internal predecessors, (308), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:45:20,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 311 transitions. [2023-04-01 12:45:20,852 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 311 transitions. Word has length 75 [2023-04-01 12:45:20,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:45:20,852 INFO L495 AbstractCegarLoop]: Abstraction has 221 states and 311 transitions. [2023-04-01 12:45:20,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:45:20,853 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 311 transitions. [2023-04-01 12:45:20,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2023-04-01 12:45:20,855 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:45:20,855 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:45:20,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 12:45:20,856 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:45:20,866 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:45:20,867 INFO L85 PathProgramCache]: Analyzing trace with hash 156688249, now seen corresponding path program 1 times [2023-04-01 12:45:20,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:45:20,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965462732] [2023-04-01 12:45:20,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:45:20,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:45:20,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:45:21,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:45:21,067 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:45:21,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965462732] [2023-04-01 12:45:21,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965462732] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:45:21,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:45:21,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:45:21,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826416529] [2023-04-01 12:45:21,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:45:21,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:45:21,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:45:21,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:45:21,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:45:21,070 INFO L87 Difference]: Start difference. First operand 221 states and 311 transitions. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:45:21,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:45:21,219 INFO L93 Difference]: Finished difference Result 529 states and 769 transitions. [2023-04-01 12:45:21,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:45:21,221 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 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 105 [2023-04-01 12:45:21,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:45:21,228 INFO L225 Difference]: With dead ends: 529 [2023-04-01 12:45:21,228 INFO L226 Difference]: Without dead ends: 351 [2023-04-01 12:45:21,229 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:45:21,231 INFO L413 NwaCegarLoop]: 281 mSDtfsCounter, 218 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:45:21,231 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [218 Valid, 499 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:45:21,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2023-04-01 12:45:21,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 349. [2023-04-01 12:45:21,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 345 states have (on average 1.4376811594202898) internal successors, (496), 345 states have internal predecessors, (496), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:45:21,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 499 transitions. [2023-04-01 12:45:21,268 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 499 transitions. Word has length 105 [2023-04-01 12:45:21,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:45:21,268 INFO L495 AbstractCegarLoop]: Abstraction has 349 states and 499 transitions. [2023-04-01 12:45:21,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:45:21,269 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 499 transitions. [2023-04-01 12:45:21,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2023-04-01 12:45:21,271 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:45:21,271 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:45:21,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 12:45:21,271 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:45:21,272 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:45:21,272 INFO L85 PathProgramCache]: Analyzing trace with hash -988847894, now seen corresponding path program 1 times [2023-04-01 12:45:21,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:45:21,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984051902] [2023-04-01 12:45:21,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:45:21,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:45:21,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:45:21,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:45:21,409 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:45:21,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984051902] [2023-04-01 12:45:21,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984051902] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:45:21,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:45:21,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:45:21,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839935751] [2023-04-01 12:45:21,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:45:21,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:45:21,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:45:21,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:45:21,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:45:21,412 INFO L87 Difference]: Start difference. First operand 349 states and 499 transitions. Second operand has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:45:21,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:45:21,537 INFO L93 Difference]: Finished difference Result 883 states and 1290 transitions. [2023-04-01 12:45:21,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:45:21,537 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 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 114 [2023-04-01 12:45:21,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:45:21,540 INFO L225 Difference]: With dead ends: 883 [2023-04-01 12:45:21,540 INFO L226 Difference]: Without dead ends: 583 [2023-04-01 12:45:21,541 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:45:21,542 INFO L413 NwaCegarLoop]: 281 mSDtfsCounter, 212 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:45:21,542 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [212 Valid, 495 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:45:21,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2023-04-01 12:45:21,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 581. [2023-04-01 12:45:21,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 581 states, 577 states have (on average 1.4454072790294628) internal successors, (834), 577 states have internal predecessors, (834), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:45:21,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 581 states to 581 states and 837 transitions. [2023-04-01 12:45:21,626 INFO L78 Accepts]: Start accepts. Automaton has 581 states and 837 transitions. Word has length 114 [2023-04-01 12:45:21,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:45:21,626 INFO L495 AbstractCegarLoop]: Abstraction has 581 states and 837 transitions. [2023-04-01 12:45:21,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:45:21,627 INFO L276 IsEmpty]: Start isEmpty. Operand 581 states and 837 transitions. [2023-04-01 12:45:21,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-04-01 12:45:21,633 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:45:21,633 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:45:21,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 12:45:21,634 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:45:21,635 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:45:21,635 INFO L85 PathProgramCache]: Analyzing trace with hash 1860367366, now seen corresponding path program 1 times [2023-04-01 12:45:21,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:45:21,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989837571] [2023-04-01 12:45:21,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:45:21,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:45:21,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:45:21,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:45:21,767 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:45:21,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989837571] [2023-04-01 12:45:21,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989837571] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:45:21,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:45:21,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:45:21,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2646744] [2023-04-01 12:45:21,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:45:21,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:45:21,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:45:21,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:45:21,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:45:21,771 INFO L87 Difference]: Start difference. First operand 581 states and 837 transitions. Second operand has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:45:21,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:45:21,958 INFO L93 Difference]: Finished difference Result 1525 states and 2225 transitions. [2023-04-01 12:45:21,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:45:21,958 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 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 123 [2023-04-01 12:45:21,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:45:21,965 INFO L225 Difference]: With dead ends: 1525 [2023-04-01 12:45:21,965 INFO L226 Difference]: Without dead ends: 999 [2023-04-01 12:45:21,966 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:45:21,973 INFO L413 NwaCegarLoop]: 281 mSDtfsCounter, 206 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 491 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:45:21,975 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [206 Valid, 491 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:45:21,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 999 states. [2023-04-01 12:45:22,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 999 to 997. [2023-04-01 12:45:22,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 997 states, 993 states have (on average 1.4431017119838871) internal successors, (1433), 993 states have internal predecessors, (1433), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:45:22,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 997 states to 997 states and 1436 transitions. [2023-04-01 12:45:22,074 INFO L78 Accepts]: Start accepts. Automaton has 997 states and 1436 transitions. Word has length 123 [2023-04-01 12:45:22,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:45:22,077 INFO L495 AbstractCegarLoop]: Abstraction has 997 states and 1436 transitions. [2023-04-01 12:45:22,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:45:22,078 INFO L276 IsEmpty]: Start isEmpty. Operand 997 states and 1436 transitions. [2023-04-01 12:45:22,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2023-04-01 12:45:22,080 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:45:22,081 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:45:22,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 12:45:22,081 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:45:22,082 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:45:22,082 INFO L85 PathProgramCache]: Analyzing trace with hash 144830766, now seen corresponding path program 1 times [2023-04-01 12:45:22,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:45:22,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217308383] [2023-04-01 12:45:22,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:45:22,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:45:22,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:45:22,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:45:22,183 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:45:22,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217308383] [2023-04-01 12:45:22,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217308383] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:45:22,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:45:22,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:45:22,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815327734] [2023-04-01 12:45:22,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:45:22,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:45:22,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:45:22,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:45:22,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:45:22,190 INFO L87 Difference]: Start difference. First operand 997 states and 1436 transitions. Second operand has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:45:22,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:45:22,524 INFO L93 Difference]: Finished difference Result 2671 states and 3871 transitions. [2023-04-01 12:45:22,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:45:22,525 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 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 132 [2023-04-01 12:45:22,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:45:22,532 INFO L225 Difference]: With dead ends: 2671 [2023-04-01 12:45:22,532 INFO L226 Difference]: Without dead ends: 1735 [2023-04-01 12:45:22,534 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:45:22,537 INFO L413 NwaCegarLoop]: 344 mSDtfsCounter, 199 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:45:22,537 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [199 Valid, 550 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:45:22,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1735 states. [2023-04-01 12:45:22,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1735 to 1733. [2023-04-01 12:45:22,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1733 states, 1729 states have (on average 1.4320416425679583) internal successors, (2476), 1729 states have internal predecessors, (2476), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:45:22,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1733 states to 1733 states and 2479 transitions. [2023-04-01 12:45:22,801 INFO L78 Accepts]: Start accepts. Automaton has 1733 states and 2479 transitions. Word has length 132 [2023-04-01 12:45:22,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:45:22,801 INFO L495 AbstractCegarLoop]: Abstraction has 1733 states and 2479 transitions. [2023-04-01 12:45:22,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:45:22,801 INFO L276 IsEmpty]: Start isEmpty. Operand 1733 states and 2479 transitions. [2023-04-01 12:45:22,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2023-04-01 12:45:22,806 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:45:22,806 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:45:22,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 12:45:22,806 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:45:22,806 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:45:22,807 INFO L85 PathProgramCache]: Analyzing trace with hash 2007182985, now seen corresponding path program 1 times [2023-04-01 12:45:22,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:45:22,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375288849] [2023-04-01 12:45:22,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:45:22,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:45:22,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:45:22,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:45:22,920 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:45:22,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375288849] [2023-04-01 12:45:22,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375288849] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:45:22,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:45:22,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:45:22,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181097129] [2023-04-01 12:45:22,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:45:22,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:45:22,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:45:22,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:45:22,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:45:22,922 INFO L87 Difference]: Start difference. First operand 1733 states and 2479 transitions. Second operand has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:45:23,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:45:23,428 INFO L93 Difference]: Finished difference Result 4681 states and 6705 transitions. [2023-04-01 12:45:23,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:45:23,429 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 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 141 [2023-04-01 12:45:23,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:45:23,441 INFO L225 Difference]: With dead ends: 4681 [2023-04-01 12:45:23,441 INFO L226 Difference]: Without dead ends: 3015 [2023-04-01 12:45:23,444 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:45:23,445 INFO L413 NwaCegarLoop]: 324 mSDtfsCounter, 193 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 526 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:45:23,445 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [193 Valid, 526 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:45:23,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3015 states. [2023-04-01 12:45:23,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3015 to 3013. [2023-04-01 12:45:23,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3013 states, 3009 states have (on average 1.4127617148554337) internal successors, (4251), 3009 states have internal predecessors, (4251), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:45:23,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3013 states to 3013 states and 4254 transitions. [2023-04-01 12:45:23,891 INFO L78 Accepts]: Start accepts. Automaton has 3013 states and 4254 transitions. Word has length 141 [2023-04-01 12:45:23,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:45:23,892 INFO L495 AbstractCegarLoop]: Abstraction has 3013 states and 4254 transitions. [2023-04-01 12:45:23,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:45:23,892 INFO L276 IsEmpty]: Start isEmpty. Operand 3013 states and 4254 transitions. [2023-04-01 12:45:23,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2023-04-01 12:45:23,900 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:45:23,900 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:45:23,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-01 12:45:23,901 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:45:23,901 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:45:23,901 INFO L85 PathProgramCache]: Analyzing trace with hash -1670120128, now seen corresponding path program 1 times [2023-04-01 12:45:23,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:45:23,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193168778] [2023-04-01 12:45:23,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:45:23,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:45:23,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:45:24,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:45:24,154 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:45:24,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193168778] [2023-04-01 12:45:24,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193168778] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:45:24,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:45:24,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-01 12:45:24,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984017257] [2023-04-01 12:45:24,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:45:24,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 12:45:24,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:45:24,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 12:45:24,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 12:45:24,156 INFO L87 Difference]: Start difference. First operand 3013 states and 4254 transitions. Second operand has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:45:25,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:45:25,937 INFO L93 Difference]: Finished difference Result 11196 states and 15748 transitions. [2023-04-01 12:45:25,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 12:45:25,938 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 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 150 [2023-04-01 12:45:25,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:45:25,969 INFO L225 Difference]: With dead ends: 11196 [2023-04-01 12:45:25,970 INFO L226 Difference]: Without dead ends: 8255 [2023-04-01 12:45:25,979 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2023-04-01 12:45:25,980 INFO L413 NwaCegarLoop]: 1645 mSDtfsCounter, 1326 mSDsluCounter, 3935 mSDsCounter, 0 mSdLazyCounter, 1193 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1326 SdHoareTripleChecker+Valid, 5580 SdHoareTripleChecker+Invalid, 1216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-01 12:45:25,981 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1326 Valid, 5580 Invalid, 1216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1193 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-01 12:45:25,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8255 states. [2023-04-01 12:45:26,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8255 to 4085. [2023-04-01 12:45:26,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4085 states, 4081 states have (on average 1.3812790982602303) internal successors, (5637), 4081 states have internal predecessors, (5637), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:45:26,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4085 states to 4085 states and 5640 transitions. [2023-04-01 12:45:26,570 INFO L78 Accepts]: Start accepts. Automaton has 4085 states and 5640 transitions. Word has length 150 [2023-04-01 12:45:26,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:45:26,570 INFO L495 AbstractCegarLoop]: Abstraction has 4085 states and 5640 transitions. [2023-04-01 12:45:26,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:45:26,570 INFO L276 IsEmpty]: Start isEmpty. Operand 4085 states and 5640 transitions. [2023-04-01 12:45:26,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2023-04-01 12:45:26,581 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:45:26,581 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:45:26,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-01 12:45:26,581 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:45:26,582 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:45:26,582 INFO L85 PathProgramCache]: Analyzing trace with hash -1092446065, now seen corresponding path program 1 times [2023-04-01 12:45:26,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:45:26,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547083651] [2023-04-01 12:45:26,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:45:26,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:45:26,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:45:26,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:45:26,697 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:45:26,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547083651] [2023-04-01 12:45:26,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547083651] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:45:26,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:45:26,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:45:26,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741730186] [2023-04-01 12:45:26,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:45:26,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:45:26,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:45:26,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:45:26,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:45:26,699 INFO L87 Difference]: Start difference. First operand 4085 states and 5640 transitions. Second operand has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:45:27,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:45:27,562 INFO L93 Difference]: Finished difference Result 10132 states and 14087 transitions. [2023-04-01 12:45:27,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:45:27,563 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 152 [2023-04-01 12:45:27,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:45:27,586 INFO L225 Difference]: With dead ends: 10132 [2023-04-01 12:45:27,586 INFO L226 Difference]: Without dead ends: 6118 [2023-04-01 12:45:27,595 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:45:27,596 INFO L413 NwaCegarLoop]: 461 mSDtfsCounter, 234 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 642 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:45:27,596 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [234 Valid, 642 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:45:27,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6118 states. [2023-04-01 12:45:28,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6118 to 6116. [2023-04-01 12:45:28,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6116 states, 6112 states have (on average 1.3838350785340314) internal successors, (8458), 6112 states have internal predecessors, (8458), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:45:28,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6116 states to 6116 states and 8461 transitions. [2023-04-01 12:45:28,528 INFO L78 Accepts]: Start accepts. Automaton has 6116 states and 8461 transitions. Word has length 152 [2023-04-01 12:45:28,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:45:28,529 INFO L495 AbstractCegarLoop]: Abstraction has 6116 states and 8461 transitions. [2023-04-01 12:45:28,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:45:28,529 INFO L276 IsEmpty]: Start isEmpty. Operand 6116 states and 8461 transitions. [2023-04-01 12:45:28,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2023-04-01 12:45:28,544 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:45:28,544 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:45:28,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-01 12:45:28,544 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:45:28,545 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:45:28,545 INFO L85 PathProgramCache]: Analyzing trace with hash 1525864240, now seen corresponding path program 1 times [2023-04-01 12:45:28,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:45:28,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876774854] [2023-04-01 12:45:28,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:45:28,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:45:28,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:45:28,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:45:28,943 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:45:28,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876774854] [2023-04-01 12:45:28,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876774854] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:45:28,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:45:28,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-01 12:45:28,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470046505] [2023-04-01 12:45:28,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:45:28,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 12:45:28,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:45:28,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 12:45:28,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-04-01 12:45:28,946 INFO L87 Difference]: Start difference. First operand 6116 states and 8461 transitions. Second operand has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:45:30,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:45:30,069 INFO L93 Difference]: Finished difference Result 12162 states and 16840 transitions. [2023-04-01 12:45:30,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 12:45:30,070 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 152 [2023-04-01 12:45:30,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:45:30,106 INFO L225 Difference]: With dead ends: 12162 [2023-04-01 12:45:30,106 INFO L226 Difference]: Without dead ends: 6118 [2023-04-01 12:45:30,116 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2023-04-01 12:45:30,118 INFO L413 NwaCegarLoop]: 451 mSDtfsCounter, 231 mSDsluCounter, 925 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 1376 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 12:45:30,119 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [231 Valid, 1376 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 324 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 12:45:30,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6118 states. [2023-04-01 12:45:30,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6118 to 6116. [2023-04-01 12:45:30,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6116 states, 6112 states have (on average 1.3825261780104712) internal successors, (8450), 6112 states have internal predecessors, (8450), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:45:30,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6116 states to 6116 states and 8453 transitions. [2023-04-01 12:45:30,942 INFO L78 Accepts]: Start accepts. Automaton has 6116 states and 8453 transitions. Word has length 152 [2023-04-01 12:45:30,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:45:30,943 INFO L495 AbstractCegarLoop]: Abstraction has 6116 states and 8453 transitions. [2023-04-01 12:45:30,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:45:30,943 INFO L276 IsEmpty]: Start isEmpty. Operand 6116 states and 8453 transitions. [2023-04-01 12:45:30,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2023-04-01 12:45:30,956 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:45:30,956 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:45:30,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-01 12:45:30,956 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:45:30,957 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:45:30,957 INFO L85 PathProgramCache]: Analyzing trace with hash 1162311086, now seen corresponding path program 1 times [2023-04-01 12:45:30,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:45:30,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763360697] [2023-04-01 12:45:30,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:45:30,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:45:31,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:45:31,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:45:31,187 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:45:31,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763360697] [2023-04-01 12:45:31,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763360697] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:45:31,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:45:31,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 12:45:31,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849851837] [2023-04-01 12:45:31,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:45:31,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 12:45:31,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:45:31,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 12:45:31,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 12:45:31,190 INFO L87 Difference]: Start difference. First operand 6116 states and 8453 transitions. Second operand has 5 states, 5 states have (on average 30.0) internal successors, (150), 4 states have internal predecessors, (150), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:45:32,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:45:32,459 INFO L93 Difference]: Finished difference Result 12185 states and 16855 transitions. [2023-04-01 12:45:32,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 12:45:32,460 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.0) internal successors, (150), 4 states have internal predecessors, (150), 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 153 [2023-04-01 12:45:32,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:45:32,474 INFO L225 Difference]: With dead ends: 12185 [2023-04-01 12:45:32,474 INFO L226 Difference]: Without dead ends: 6116 [2023-04-01 12:45:32,483 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-01 12:45:32,484 INFO L413 NwaCegarLoop]: 147 mSDtfsCounter, 824 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 824 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 12:45:32,485 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [824 Valid, 162 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 12:45:32,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6116 states. [2023-04-01 12:45:33,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6116 to 6116. [2023-04-01 12:45:33,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6116 states, 6112 states have (on average 1.362401832460733) internal successors, (8327), 6112 states have internal predecessors, (8327), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:45:33,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6116 states to 6116 states and 8330 transitions. [2023-04-01 12:45:33,231 INFO L78 Accepts]: Start accepts. Automaton has 6116 states and 8330 transitions. Word has length 153 [2023-04-01 12:45:33,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:45:33,231 INFO L495 AbstractCegarLoop]: Abstraction has 6116 states and 8330 transitions. [2023-04-01 12:45:33,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.0) internal successors, (150), 4 states have internal predecessors, (150), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:45:33,232 INFO L276 IsEmpty]: Start isEmpty. Operand 6116 states and 8330 transitions. [2023-04-01 12:45:33,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2023-04-01 12:45:33,262 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:45:33,262 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:45:33,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-01 12:45:33,263 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:45:33,263 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:45:33,263 INFO L85 PathProgramCache]: Analyzing trace with hash 1358850121, now seen corresponding path program 1 times [2023-04-01 12:45:33,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:45:33,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089860905] [2023-04-01 12:45:33,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:45:33,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:45:33,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:45:33,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:45:33,464 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:45:33,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089860905] [2023-04-01 12:45:33,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089860905] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:45:33,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:45:33,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 12:45:33,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267081858] [2023-04-01 12:45:33,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:45:33,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 12:45:33,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:45:33,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 12:45:33,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 12:45:33,466 INFO L87 Difference]: Start difference. First operand 6116 states and 8330 transitions. Second operand has 5 states, 5 states have (on average 30.0) internal successors, (150), 4 states have internal predecessors, (150), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:45:34,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:45:34,482 INFO L93 Difference]: Finished difference Result 12173 states and 16594 transitions. [2023-04-01 12:45:34,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 12:45:34,483 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.0) internal successors, (150), 4 states have internal predecessors, (150), 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 153 [2023-04-01 12:45:34,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:45:34,495 INFO L225 Difference]: With dead ends: 12173 [2023-04-01 12:45:34,496 INFO L226 Difference]: Without dead ends: 6116 [2023-04-01 12:45:34,508 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-01 12:45:34,509 INFO L413 NwaCegarLoop]: 147 mSDtfsCounter, 783 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 783 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 12:45:34,509 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [783 Valid, 178 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 12:45:34,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6116 states. [2023-04-01 12:45:35,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6116 to 6116. [2023-04-01 12:45:35,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6116 states, 6112 states have (on average 1.3471858638743455) internal successors, (8234), 6112 states have internal predecessors, (8234), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:45:35,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6116 states to 6116 states and 8237 transitions. [2023-04-01 12:45:35,436 INFO L78 Accepts]: Start accepts. Automaton has 6116 states and 8237 transitions. Word has length 153 [2023-04-01 12:45:35,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:45:35,436 INFO L495 AbstractCegarLoop]: Abstraction has 6116 states and 8237 transitions. [2023-04-01 12:45:35,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.0) internal successors, (150), 4 states have internal predecessors, (150), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:45:35,437 INFO L276 IsEmpty]: Start isEmpty. Operand 6116 states and 8237 transitions. [2023-04-01 12:45:35,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2023-04-01 12:45:35,450 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:45:35,450 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:45:35,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-04-01 12:45:35,450 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:45:35,451 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:45:35,451 INFO L85 PathProgramCache]: Analyzing trace with hash -136633756, now seen corresponding path program 1 times [2023-04-01 12:45:35,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:45:35,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489412916] [2023-04-01 12:45:35,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:45:35,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:45:35,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:45:35,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:45:35,638 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:45:35,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489412916] [2023-04-01 12:45:35,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489412916] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:45:35,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:45:35,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 12:45:35,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312490355] [2023-04-01 12:45:35,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:45:35,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 12:45:35,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:45:35,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 12:45:35,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 12:45:35,640 INFO L87 Difference]: Start difference. First operand 6116 states and 8237 transitions. Second operand has 5 states, 5 states have (on average 30.0) internal successors, (150), 4 states have internal predecessors, (150), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:45:36,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:45:36,883 INFO L93 Difference]: Finished difference Result 12193 states and 16432 transitions. [2023-04-01 12:45:36,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 12:45:36,884 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.0) internal successors, (150), 4 states have internal predecessors, (150), 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 153 [2023-04-01 12:45:36,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:45:36,898 INFO L225 Difference]: With dead ends: 12193 [2023-04-01 12:45:36,898 INFO L226 Difference]: Without dead ends: 6118 [2023-04-01 12:45:36,911 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 [2023-04-01 12:45:36,912 INFO L413 NwaCegarLoop]: 236 mSDtfsCounter, 809 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 365 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 809 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 12:45:36,912 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [809 Valid, 336 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 365 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 12:45:36,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6118 states. [2023-04-01 12:45:37,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6118 to 6116. [2023-04-01 12:45:37,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6116 states, 6112 states have (on average 1.331315445026178) internal successors, (8137), 6112 states have internal predecessors, (8137), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:45:37,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6116 states to 6116 states and 8140 transitions. [2023-04-01 12:45:37,702 INFO L78 Accepts]: Start accepts. Automaton has 6116 states and 8140 transitions. Word has length 153 [2023-04-01 12:45:37,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:45:37,702 INFO L495 AbstractCegarLoop]: Abstraction has 6116 states and 8140 transitions. [2023-04-01 12:45:37,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.0) internal successors, (150), 4 states have internal predecessors, (150), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:45:37,702 INFO L276 IsEmpty]: Start isEmpty. Operand 6116 states and 8140 transitions. [2023-04-01 12:45:37,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2023-04-01 12:45:37,716 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:45:37,716 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:45:37,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-04-01 12:45:37,716 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:45:37,716 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:45:37,717 INFO L85 PathProgramCache]: Analyzing trace with hash 1749345028, now seen corresponding path program 1 times [2023-04-01 12:45:37,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:45:37,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232557727] [2023-04-01 12:45:37,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:45:37,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:45:37,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:45:37,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:45:37,935 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:45:37,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232557727] [2023-04-01 12:45:37,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232557727] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:45:37,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:45:37,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:45:37,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649162686] [2023-04-01 12:45:37,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:45:37,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:45:37,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:45:37,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:45:37,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:45:37,937 INFO L87 Difference]: Start difference. First operand 6116 states and 8140 transitions. Second operand has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:45:38,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:45:38,446 INFO L93 Difference]: Finished difference Result 7748 states and 10350 transitions. [2023-04-01 12:45:38,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:45:38,446 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 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 153 [2023-04-01 12:45:38,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:45:38,452 INFO L225 Difference]: With dead ends: 7748 [2023-04-01 12:45:38,452 INFO L226 Difference]: Without dead ends: 2689 [2023-04-01 12:45:38,461 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:45:38,462 INFO L413 NwaCegarLoop]: 258 mSDtfsCounter, 101 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 430 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:45:38,462 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 430 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:45:38,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2689 states. [2023-04-01 12:45:38,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2689 to 2543. [2023-04-01 12:45:38,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2543 states, 2539 states have (on average 1.3367467506892476) internal successors, (3394), 2539 states have internal predecessors, (3394), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:45:38,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2543 states to 2543 states and 3397 transitions. [2023-04-01 12:45:38,896 INFO L78 Accepts]: Start accepts. Automaton has 2543 states and 3397 transitions. Word has length 153 [2023-04-01 12:45:38,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:45:38,896 INFO L495 AbstractCegarLoop]: Abstraction has 2543 states and 3397 transitions. [2023-04-01 12:45:38,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:45:38,897 INFO L276 IsEmpty]: Start isEmpty. Operand 2543 states and 3397 transitions. [2023-04-01 12:45:38,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2023-04-01 12:45:38,902 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:45:38,902 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:45:38,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-04-01 12:45:38,902 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:45:38,903 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:45:38,903 INFO L85 PathProgramCache]: Analyzing trace with hash -578702310, now seen corresponding path program 1 times [2023-04-01 12:45:38,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:45:38,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714228095] [2023-04-01 12:45:38,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:45:38,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:45:38,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:45:39,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:45:39,085 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:45:39,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714228095] [2023-04-01 12:45:39,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714228095] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:45:39,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:45:39,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:45:39,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238734789] [2023-04-01 12:45:39,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:45:39,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:45:39,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:45:39,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:45:39,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:45:39,088 INFO L87 Difference]: Start difference. First operand 2543 states and 3397 transitions. Second operand has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:45:39,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:45:39,376 INFO L93 Difference]: Finished difference Result 3635 states and 4855 transitions. [2023-04-01 12:45:39,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:45:39,376 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 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 153 [2023-04-01 12:45:39,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:45:39,379 INFO L225 Difference]: With dead ends: 3635 [2023-04-01 12:45:39,379 INFO L226 Difference]: Without dead ends: 1403 [2023-04-01 12:45:39,383 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:45:39,384 INFO L413 NwaCegarLoop]: 247 mSDtfsCounter, 87 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:45:39,384 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 419 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:45:39,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1403 states. [2023-04-01 12:45:39,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1403 to 1401. [2023-04-01 12:45:39,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1401 states, 1397 states have (on average 1.3106657122405154) internal successors, (1831), 1397 states have internal predecessors, (1831), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:45:39,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1401 states to 1401 states and 1834 transitions. [2023-04-01 12:45:39,603 INFO L78 Accepts]: Start accepts. Automaton has 1401 states and 1834 transitions. Word has length 153 [2023-04-01 12:45:39,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:45:39,604 INFO L495 AbstractCegarLoop]: Abstraction has 1401 states and 1834 transitions. [2023-04-01 12:45:39,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:45:39,604 INFO L276 IsEmpty]: Start isEmpty. Operand 1401 states and 1834 transitions. [2023-04-01 12:45:39,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2023-04-01 12:45:39,607 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:45:39,607 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:45:39,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-04-01 12:45:39,607 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:45:39,608 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:45:39,608 INFO L85 PathProgramCache]: Analyzing trace with hash 2087720698, now seen corresponding path program 1 times [2023-04-01 12:45:39,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:45:39,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739544675] [2023-04-01 12:45:39,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:45:39,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:45:39,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:45:39,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:45:39,755 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:45:39,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739544675] [2023-04-01 12:45:39,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739544675] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:45:39,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:45:39,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:45:39,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422154222] [2023-04-01 12:45:39,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:45:39,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:45:39,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:45:39,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:45:39,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:45:39,757 INFO L87 Difference]: Start difference. First operand 1401 states and 1834 transitions. Second operand has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:45:39,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:45:39,946 INFO L93 Difference]: Finished difference Result 1945 states and 2556 transitions. [2023-04-01 12:45:39,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:45:39,947 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 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 153 [2023-04-01 12:45:39,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:45:39,949 INFO L225 Difference]: With dead ends: 1945 [2023-04-01 12:45:39,949 INFO L226 Difference]: Without dead ends: 785 [2023-04-01 12:45:39,952 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:45:39,952 INFO L413 NwaCegarLoop]: 234 mSDtfsCounter, 70 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:45:39,953 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 406 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:45:39,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 785 states. [2023-04-01 12:45:40,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 785 to 783. [2023-04-01 12:45:40,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 783 states, 779 states have (on average 1.2862644415917843) internal successors, (1002), 779 states have internal predecessors, (1002), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:45:40,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 783 states to 783 states and 1005 transitions. [2023-04-01 12:45:40,063 INFO L78 Accepts]: Start accepts. Automaton has 783 states and 1005 transitions. Word has length 153 [2023-04-01 12:45:40,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:45:40,064 INFO L495 AbstractCegarLoop]: Abstraction has 783 states and 1005 transitions. [2023-04-01 12:45:40,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:45:40,064 INFO L276 IsEmpty]: Start isEmpty. Operand 783 states and 1005 transitions. [2023-04-01 12:45:40,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2023-04-01 12:45:40,066 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:45:40,066 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:45:40,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-04-01 12:45:40,066 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:45:40,067 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:45:40,067 INFO L85 PathProgramCache]: Analyzing trace with hash -1458301630, now seen corresponding path program 1 times [2023-04-01 12:45:40,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:45:40,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333725682] [2023-04-01 12:45:40,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:45:40,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:45:40,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:45:40,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:45:40,214 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:45:40,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333725682] [2023-04-01 12:45:40,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333725682] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:45:40,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:45:40,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:45:40,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636450460] [2023-04-01 12:45:40,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:45:40,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:45:40,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:45:40,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:45:40,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:45:40,216 INFO L87 Difference]: Start difference. First operand 783 states and 1005 transitions. Second operand has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:45:40,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:45:40,368 INFO L93 Difference]: Finished difference Result 1027 states and 1323 transitions. [2023-04-01 12:45:40,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:45:40,369 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 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 153 [2023-04-01 12:45:40,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:45:40,370 INFO L225 Difference]: With dead ends: 1027 [2023-04-01 12:45:40,370 INFO L226 Difference]: Without dead ends: 443 [2023-04-01 12:45:40,372 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:45:40,372 INFO L413 NwaCegarLoop]: 228 mSDtfsCounter, 60 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:45:40,373 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 400 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:45:40,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2023-04-01 12:45:40,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 441. [2023-04-01 12:45:40,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 437 states have (on average 1.2540045766590389) internal successors, (548), 437 states have internal predecessors, (548), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:45:40,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 551 transitions. [2023-04-01 12:45:40,491 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 551 transitions. Word has length 153 [2023-04-01 12:45:40,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:45:40,491 INFO L495 AbstractCegarLoop]: Abstraction has 441 states and 551 transitions. [2023-04-01 12:45:40,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:45:40,492 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 551 transitions. [2023-04-01 12:45:40,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2023-04-01 12:45:40,493 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:45:40,493 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:45:40,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-04-01 12:45:40,494 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:45:40,494 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:45:40,494 INFO L85 PathProgramCache]: Analyzing trace with hash -792208532, now seen corresponding path program 1 times [2023-04-01 12:45:40,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:45:40,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088148477] [2023-04-01 12:45:40,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:45:40,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:45:40,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:45:40,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:45:40,934 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:45:40,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088148477] [2023-04-01 12:45:40,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088148477] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:45:40,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:45:40,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 12:45:40,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290734863] [2023-04-01 12:45:40,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:45:40,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 12:45:40,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:45:40,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 12:45:40,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 12:45:40,936 INFO L87 Difference]: Start difference. First operand 441 states and 551 transitions. Second operand has 6 states, 6 states have (on average 25.0) internal successors, (150), 5 states have internal predecessors, (150), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:45:41,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:45:41,162 INFO L93 Difference]: Finished difference Result 829 states and 1045 transitions. [2023-04-01 12:45:41,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 12:45:41,163 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 25.0) internal successors, (150), 5 states have internal predecessors, (150), 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 153 [2023-04-01 12:45:41,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:45:41,165 INFO L225 Difference]: With dead ends: 829 [2023-04-01 12:45:41,165 INFO L226 Difference]: Without dead ends: 441 [2023-04-01 12:45:41,166 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-04-01 12:45:41,166 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 694 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 694 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:45:41,166 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [694 Valid, 146 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:45:41,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2023-04-01 12:45:41,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 441. [2023-04-01 12:45:41,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 437 states have (on average 1.2334096109839816) internal successors, (539), 437 states have internal predecessors, (539), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:45:41,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 542 transitions. [2023-04-01 12:45:41,260 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 542 transitions. Word has length 153 [2023-04-01 12:45:41,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:45:41,261 INFO L495 AbstractCegarLoop]: Abstraction has 441 states and 542 transitions. [2023-04-01 12:45:41,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 25.0) internal successors, (150), 5 states have internal predecessors, (150), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:45:41,261 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 542 transitions. [2023-04-01 12:45:41,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2023-04-01 12:45:41,262 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:45:41,262 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:45:41,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-04-01 12:45:41,263 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:45:41,263 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:45:41,263 INFO L85 PathProgramCache]: Analyzing trace with hash 2055729169, now seen corresponding path program 1 times [2023-04-01 12:45:41,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:45:41,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329410804] [2023-04-01 12:45:41,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:45:41,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:45:41,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:45:41,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:45:41,968 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:45:41,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329410804] [2023-04-01 12:45:41,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329410804] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:45:41,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:45:41,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 12:45:41,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722358833] [2023-04-01 12:45:41,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:45:41,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 12:45:41,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:45:41,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 12:45:41,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 12:45:41,970 INFO L87 Difference]: Start difference. First operand 441 states and 542 transitions. Second operand has 6 states, 6 states have (on average 25.0) internal successors, (150), 5 states have internal predecessors, (150), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:45:42,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:45:42,215 INFO L93 Difference]: Finished difference Result 761 states and 941 transitions. [2023-04-01 12:45:42,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 12:45:42,215 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 25.0) internal successors, (150), 5 states have internal predecessors, (150), 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 153 [2023-04-01 12:45:42,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:45:42,217 INFO L225 Difference]: With dead ends: 761 [2023-04-01 12:45:42,217 INFO L226 Difference]: Without dead ends: 441 [2023-04-01 12:45:42,218 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-04-01 12:45:42,218 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 419 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 419 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:45:42,219 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [419 Valid, 133 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:45:42,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2023-04-01 12:45:42,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 441. [2023-04-01 12:45:42,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 437 states have (on average 1.2151029748283753) internal successors, (531), 437 states have internal predecessors, (531), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:45:42,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 534 transitions. [2023-04-01 12:45:42,328 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 534 transitions. Word has length 153 [2023-04-01 12:45:42,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:45:42,328 INFO L495 AbstractCegarLoop]: Abstraction has 441 states and 534 transitions. [2023-04-01 12:45:42,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 25.0) internal successors, (150), 5 states have internal predecessors, (150), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:45:42,328 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 534 transitions. [2023-04-01 12:45:42,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2023-04-01 12:45:42,329 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:45:42,329 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:45:42,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-04-01 12:45:42,330 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:45:42,330 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:45:42,330 INFO L85 PathProgramCache]: Analyzing trace with hash -1340557669, now seen corresponding path program 1 times [2023-04-01 12:45:42,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:45:42,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488403311] [2023-04-01 12:45:42,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:45:42,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:45:42,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:45:42,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:45:42,815 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:45:42,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488403311] [2023-04-01 12:45:42,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488403311] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:45:42,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:45:42,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 12:45:42,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448832797] [2023-04-01 12:45:42,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:45:42,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 12:45:42,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:45:42,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 12:45:42,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 12:45:42,817 INFO L87 Difference]: Start difference. First operand 441 states and 534 transitions. Second operand has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:45:43,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:45:43,011 INFO L93 Difference]: Finished difference Result 725 states and 886 transitions. [2023-04-01 12:45:43,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 12:45:43,012 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 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 153 [2023-04-01 12:45:43,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:45:43,013 INFO L225 Difference]: With dead ends: 725 [2023-04-01 12:45:43,014 INFO L226 Difference]: Without dead ends: 441 [2023-04-01 12:45:43,014 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-01 12:45:43,015 INFO L413 NwaCegarLoop]: 211 mSDtfsCounter, 1 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 628 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:45:43,015 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 628 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:45:43,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2023-04-01 12:45:43,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 441. [2023-04-01 12:45:43,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 437 states have (on average 1.205949656750572) internal successors, (527), 437 states have internal predecessors, (527), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:45:43,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 530 transitions. [2023-04-01 12:45:43,122 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 530 transitions. Word has length 153 [2023-04-01 12:45:43,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:45:43,122 INFO L495 AbstractCegarLoop]: Abstraction has 441 states and 530 transitions. [2023-04-01 12:45:43,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:45:43,122 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 530 transitions. [2023-04-01 12:45:43,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2023-04-01 12:45:43,123 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:45:43,123 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:45:43,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-04-01 12:45:43,124 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:45:43,124 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:45:43,124 INFO L85 PathProgramCache]: Analyzing trace with hash -910897625, now seen corresponding path program 1 times [2023-04-01 12:45:43,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:45:43,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391319276] [2023-04-01 12:45:43,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:45:43,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:45:43,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:45:43,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:45:43,210 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:45:43,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391319276] [2023-04-01 12:45:43,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391319276] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:45:43,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:45:43,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:45:43,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881787046] [2023-04-01 12:45:43,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:45:43,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:45:43,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:45:43,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:45:43,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:45:43,212 INFO L87 Difference]: Start difference. First operand 441 states and 530 transitions. Second operand has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:45:43,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:45:43,356 INFO L93 Difference]: Finished difference Result 673 states and 817 transitions. [2023-04-01 12:45:43,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:45:43,357 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 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 155 [2023-04-01 12:45:43,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:45:43,358 INFO L225 Difference]: With dead ends: 673 [2023-04-01 12:45:43,358 INFO L226 Difference]: Without dead ends: 379 [2023-04-01 12:45:43,359 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:45:43,360 INFO L413 NwaCegarLoop]: 210 mSDtfsCounter, 0 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:45:43,360 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 404 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:45:43,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2023-04-01 12:45:43,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 379. [2023-04-01 12:45:43,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 375 states have (on average 1.176) internal successors, (441), 375 states have internal predecessors, (441), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:45:43,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 444 transitions. [2023-04-01 12:45:43,454 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 444 transitions. Word has length 155 [2023-04-01 12:45:43,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:45:43,455 INFO L495 AbstractCegarLoop]: Abstraction has 379 states and 444 transitions. [2023-04-01 12:45:43,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:45:43,455 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 444 transitions. [2023-04-01 12:45:43,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2023-04-01 12:45:43,456 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:45:43,456 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:45:43,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-04-01 12:45:43,456 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:45:43,457 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:45:43,457 INFO L85 PathProgramCache]: Analyzing trace with hash 2120530513, now seen corresponding path program 1 times [2023-04-01 12:45:43,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:45:43,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230582857] [2023-04-01 12:45:43,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:45:43,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:45:43,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:45:43,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:45:43,665 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:45:43,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230582857] [2023-04-01 12:45:43,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230582857] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:45:43,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:45:43,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:45:43,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705716431] [2023-04-01 12:45:43,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:45:43,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:45:43,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:45:43,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:45:43,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:45:43,667 INFO L87 Difference]: Start difference. First operand 379 states and 444 transitions. Second operand has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:45:43,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:45:43,764 INFO L93 Difference]: Finished difference Result 508 states and 597 transitions. [2023-04-01 12:45:43,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:45:43,765 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 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 156 [2023-04-01 12:45:43,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:45:43,765 INFO L225 Difference]: With dead ends: 508 [2023-04-01 12:45:43,766 INFO L226 Difference]: Without dead ends: 238 [2023-04-01 12:45:43,766 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:45:43,767 INFO L413 NwaCegarLoop]: 196 mSDtfsCounter, 50 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:45:43,767 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 337 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:45:43,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2023-04-01 12:45:43,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 236. [2023-04-01 12:45:43,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 232 states have (on average 1.1422413793103448) internal successors, (265), 232 states have internal predecessors, (265), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:45:43,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 268 transitions. [2023-04-01 12:45:43,827 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 268 transitions. Word has length 156 [2023-04-01 12:45:43,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:45:43,827 INFO L495 AbstractCegarLoop]: Abstraction has 236 states and 268 transitions. [2023-04-01 12:45:43,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:45:43,828 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 268 transitions. [2023-04-01 12:45:43,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2023-04-01 12:45:43,828 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:45:43,828 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:45:43,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-04-01 12:45:43,829 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:45:43,829 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:45:43,829 INFO L85 PathProgramCache]: Analyzing trace with hash -253239188, now seen corresponding path program 1 times [2023-04-01 12:45:43,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:45:43,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68811486] [2023-04-01 12:45:43,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:45:43,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:45:44,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:45:44,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:45:44,294 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:45:44,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68811486] [2023-04-01 12:45:44,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68811486] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:45:44,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:45:44,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 12:45:44,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819060107] [2023-04-01 12:45:44,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:45:44,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 12:45:44,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:45:44,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 12:45:44,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 12:45:44,296 INFO L87 Difference]: Start difference. First operand 236 states and 268 transitions. Second operand has 4 states, 4 states have (on average 39.0) internal successors, (156), 4 states have internal predecessors, (156), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:45:44,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:45:44,400 INFO L93 Difference]: Finished difference Result 328 states and 378 transitions. [2023-04-01 12:45:44,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 12:45:44,400 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 39.0) internal successors, (156), 4 states have internal predecessors, (156), 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 159 [2023-04-01 12:45:44,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:45:44,401 INFO L225 Difference]: With dead ends: 328 [2023-04-01 12:45:44,401 INFO L226 Difference]: Without dead ends: 234 [2023-04-01 12:45:44,402 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-01 12:45:44,403 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 1 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 568 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:45:44,403 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 568 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:45:44,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2023-04-01 12:45:44,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 234. [2023-04-01 12:45:44,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 230 states have (on average 1.1347826086956523) internal successors, (261), 230 states have internal predecessors, (261), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:45:44,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 264 transitions. [2023-04-01 12:45:44,461 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 264 transitions. Word has length 159 [2023-04-01 12:45:44,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:45:44,461 INFO L495 AbstractCegarLoop]: Abstraction has 234 states and 264 transitions. [2023-04-01 12:45:44,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.0) internal successors, (156), 4 states have internal predecessors, (156), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:45:44,461 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 264 transitions. [2023-04-01 12:45:44,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2023-04-01 12:45:44,462 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:45:44,462 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:45:44,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-04-01 12:45:44,462 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:45:44,462 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:45:44,463 INFO L85 PathProgramCache]: Analyzing trace with hash -1474717697, now seen corresponding path program 1 times [2023-04-01 12:45:44,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:45:44,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455109894] [2023-04-01 12:45:44,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:45:44,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:45:44,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:45:44,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:45:44,829 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:45:44,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455109894] [2023-04-01 12:45:44,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455109894] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:45:44,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:45:44,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 12:45:44,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028228576] [2023-04-01 12:45:44,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:45:44,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 12:45:44,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:45:44,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 12:45:44,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-01 12:45:44,831 INFO L87 Difference]: Start difference. First operand 234 states and 264 transitions. Second operand has 6 states, 6 states have (on average 27.0) internal successors, (162), 6 states have internal predecessors, (162), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:45:45,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:45:45,012 INFO L93 Difference]: Finished difference Result 291 states and 329 transitions. [2023-04-01 12:45:45,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 12:45:45,013 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 27.0) internal successors, (162), 6 states have internal predecessors, (162), 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 165 [2023-04-01 12:45:45,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:45:45,014 INFO L225 Difference]: With dead ends: 291 [2023-04-01 12:45:45,014 INFO L226 Difference]: Without dead ends: 289 [2023-04-01 12:45:45,014 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2023-04-01 12:45:45,015 INFO L413 NwaCegarLoop]: 228 mSDtfsCounter, 272 mSDsluCounter, 631 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 859 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:45:45,015 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [272 Valid, 859 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:45:45,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2023-04-01 12:45:45,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 236. [2023-04-01 12:45:45,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 232 states have (on average 1.1293103448275863) internal successors, (262), 232 states have internal predecessors, (262), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:45:45,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 265 transitions. [2023-04-01 12:45:45,080 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 265 transitions. Word has length 165 [2023-04-01 12:45:45,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:45:45,080 INFO L495 AbstractCegarLoop]: Abstraction has 236 states and 265 transitions. [2023-04-01 12:45:45,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 27.0) internal successors, (162), 6 states have internal predecessors, (162), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:45:45,081 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 265 transitions. [2023-04-01 12:45:45,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2023-04-01 12:45:45,082 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:45:45,082 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:45:45,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-04-01 12:45:45,082 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:45:45,083 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:45:45,083 INFO L85 PathProgramCache]: Analyzing trace with hash 869964602, now seen corresponding path program 1 times [2023-04-01 12:45:45,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:45:45,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438805231] [2023-04-01 12:45:45,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:45:45,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:45:45,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat