/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-03 02:40:14,711 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-03 02:40:14,712 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-03 02:40:14,735 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-03 02:40:14,735 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-03 02:40:14,736 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-03 02:40:14,738 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-03 02:40:14,741 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-03 02:40:14,742 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-03 02:40:14,746 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-03 02:40:14,748 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-03 02:40:14,749 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-03 02:40:14,749 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-03 02:40:14,753 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-03 02:40:14,753 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-03 02:40:14,755 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-03 02:40:14,755 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-03 02:40:14,756 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-03 02:40:14,758 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-03 02:40:14,761 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-03 02:40:14,762 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-03 02:40:14,763 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-03 02:40:14,764 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-03 02:40:14,765 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-03 02:40:14,769 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-03 02:40:14,770 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-03 02:40:14,770 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-03 02:40:14,770 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-03 02:40:14,770 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-03 02:40:14,771 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-03 02:40:14,771 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-03 02:40:14,771 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-03 02:40:14,772 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-03 02:40:14,772 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-03 02:40:14,773 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-03 02:40:14,773 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-03 02:40:14,773 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-03 02:40:14,774 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-03 02:40:14,774 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-03 02:40:14,774 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-03 02:40:14,775 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-03 02:40:14,778 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-03 02:40:14,801 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-03 02:40:14,801 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-03 02:40:14,801 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-03 02:40:14,801 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-03 02:40:14,802 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-03 02:40:14,802 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-03 02:40:14,802 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-03 02:40:14,802 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-03 02:40:14,802 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-03 02:40:14,802 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-03 02:40:14,803 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-03 02:40:14,803 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-03 02:40:14,803 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-03 02:40:14,803 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-03 02:40:14,803 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-03 02:40:14,804 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-03 02:40:14,804 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-03 02:40:14,804 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-03 02:40:14,804 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-03 02:40:14,804 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-03 02:40:14,804 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-03 02:40:14,805 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-03 02:40:14,805 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-03 02:40:14,805 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-03 02:40:14,805 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-03 02:40:14,805 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-03 02:40:14,805 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-03 02:40:14,805 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-03 02:40:14,806 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-03 02:40:14,806 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-03 02:40:14,806 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-03 02:40:14,806 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-03 02:40:14,806 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 02:40:14,806 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-03 02:40:14,806 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-03 02:40:14,806 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-03 02:40:14,806 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-03 02:40:14,807 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-03 02:40:14,807 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-03 02:40:14,807 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-03 02:40:14,807 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-03 02:40:14,807 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-03 02:40:14,944 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-03 02:40:14,958 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-03 02:40:14,959 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-03 02:40:14,960 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-03 02:40:14,960 INFO L275 PluginConnector]: CDTParser initialized [2023-04-03 02:40:14,961 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2023-04-03 02:40:15,943 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-03 02:40:16,189 INFO L351 CDTParser]: Found 1 translation units. [2023-04-03 02:40:16,189 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2023-04-03 02:40:16,195 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f12cd615/b1547d50dce8475fa317db4894e407e0/FLAGa127f1d18 [2023-04-03 02:40:16,567 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f12cd615/b1547d50dce8475fa317db4894e407e0 [2023-04-03 02:40:16,570 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-03 02:40:16,571 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-03 02:40:16,572 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-03 02:40:16,572 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-03 02:40:16,587 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-03 02:40:16,587 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 02:40:16" (1/1) ... [2023-04-03 02:40:16,588 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@236ad73f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:40:16, skipping insertion in model container [2023-04-03 02:40:16,588 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 02:40:16" (1/1) ... [2023-04-03 02:40:16,592 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-03 02:40:16,631 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-03 02:40:16,773 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c[7253,7266] [2023-04-03 02:40:16,801 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 02:40:16,811 INFO L203 MainTranslator]: Completed pre-run [2023-04-03 02:40:16,840 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c[7253,7266] [2023-04-03 02:40:16,871 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 02:40:16,883 INFO L208 MainTranslator]: Completed translation [2023-04-03 02:40:16,883 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:40:16 WrapperNode [2023-04-03 02:40:16,883 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-03 02:40:16,884 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-03 02:40:16,884 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-03 02:40:16,884 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-03 02:40:16,892 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:40:16" (1/1) ... [2023-04-03 02:40:16,892 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:40:16" (1/1) ... [2023-04-03 02:40:16,899 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:40:16" (1/1) ... [2023-04-03 02:40:16,899 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:40:16" (1/1) ... [2023-04-03 02:40:16,909 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:40:16" (1/1) ... [2023-04-03 02:40:16,914 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:40:16" (1/1) ... [2023-04-03 02:40:16,916 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:40:16" (1/1) ... [2023-04-03 02:40:16,918 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:40:16" (1/1) ... [2023-04-03 02:40:16,920 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-03 02:40:16,921 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-03 02:40:16,921 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-03 02:40:16,921 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-03 02:40:16,922 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:40:16" (1/1) ... [2023-04-03 02:40:16,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 02:40:16,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 02:40:16,968 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-03 02:40:16,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-03 02:40:16,994 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-03 02:40:16,994 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-03 02:40:16,994 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-03 02:40:16,994 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-03 02:40:16,994 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-03 02:40:16,994 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-03 02:40:16,994 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-03 02:40:16,995 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-03 02:40:16,995 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-03 02:40:16,995 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-03 02:40:16,995 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-03 02:40:16,995 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-03 02:40:16,995 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-03 02:40:16,995 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-03 02:40:16,995 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-03 02:40:16,995 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-03 02:40:16,995 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-03 02:40:16,995 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-03 02:40:16,995 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2023-04-03 02:40:16,995 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-03 02:40:16,996 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-03 02:40:16,996 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-03 02:40:16,996 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-03 02:40:16,996 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-03 02:40:16,996 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-03 02:40:16,996 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-03 02:40:16,996 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-03 02:40:16,996 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-03 02:40:17,112 INFO L236 CfgBuilder]: Building ICFG [2023-04-03 02:40:17,113 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-03 02:40:17,503 INFO L277 CfgBuilder]: Performing block encoding [2023-04-03 02:40:17,626 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-03 02:40:17,626 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-03 02:40:17,629 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 02:40:17 BoogieIcfgContainer [2023-04-03 02:40:17,629 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-03 02:40:17,632 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-03 02:40:17,632 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-03 02:40:17,634 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-03 02:40:17,634 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.04 02:40:16" (1/3) ... [2023-04-03 02:40:17,635 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e50d0a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 02:40:17, skipping insertion in model container [2023-04-03 02:40:17,635 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:40:16" (2/3) ... [2023-04-03 02:40:17,635 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e50d0a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 02:40:17, skipping insertion in model container [2023-04-03 02:40:17,635 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 02:40:17" (3/3) ... [2023-04-03 02:40:17,636 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2023-04-03 02:40:17,647 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-03 02:40:17,647 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-03 02:40:17,698 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-03 02:40:17,705 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;@3cea3def, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-03 02:40:17,706 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-03 02:40:17,722 INFO L276 IsEmpty]: Start isEmpty. Operand has 131 states, 125 states have (on average 1.696) internal successors, (212), 126 states have internal predecessors, (212), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-03 02:40:17,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-04-03 02:40:17,730 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:40:17,731 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] [2023-04-03 02:40:17,745 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:40:17,750 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:40:17,750 INFO L85 PathProgramCache]: Analyzing trace with hash -1363610891, now seen corresponding path program 1 times [2023-04-03 02:40:17,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:40:17,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452607053] [2023-04-03 02:40:17,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:40:17,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:40:17,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:40:18,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:40:18,214 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:40:18,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452607053] [2023-04-03 02:40:18,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452607053] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:40:18,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:40:18,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-03 02:40:18,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26549248] [2023-04-03 02:40:18,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:40:18,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-03 02:40:18,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:40:18,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-03 02:40:18,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-04-03 02:40:18,252 INFO L87 Difference]: Start difference. First operand has 131 states, 125 states have (on average 1.696) internal successors, (212), 126 states have internal predecessors, (212), 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 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:40:18,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:40:18,542 INFO L93 Difference]: Finished difference Result 398 states and 627 transitions. [2023-04-03 02:40:18,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-03 02:40:18,544 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 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 57 [2023-04-03 02:40:18,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:40:18,558 INFO L225 Difference]: With dead ends: 398 [2023-04-03 02:40:18,558 INFO L226 Difference]: Without dead ends: 309 [2023-04-03 02:40:18,561 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-04-03 02:40:18,566 INFO L413 NwaCegarLoop]: 332 mSDtfsCounter, 638 mSDsluCounter, 483 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 638 SdHoareTripleChecker+Valid, 815 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-03 02:40:18,567 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [638 Valid, 815 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-03 02:40:18,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2023-04-03 02:40:18,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 303. [2023-04-03 02:40:18,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 299 states have (on average 1.37123745819398) internal successors, (410), 299 states have internal predecessors, (410), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:40:18,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 413 transitions. [2023-04-03 02:40:18,655 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 413 transitions. Word has length 57 [2023-04-03 02:40:18,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:40:18,656 INFO L495 AbstractCegarLoop]: Abstraction has 303 states and 413 transitions. [2023-04-03 02:40:18,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:40:18,656 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 413 transitions. [2023-04-03 02:40:18,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-04-03 02:40:18,657 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:40:18,657 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:40:18,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-03 02:40:18,658 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:40:18,658 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:40:18,658 INFO L85 PathProgramCache]: Analyzing trace with hash -2089358050, now seen corresponding path program 1 times [2023-04-03 02:40:18,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:40:18,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325956046] [2023-04-03 02:40:18,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:40:18,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:40:18,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:40:18,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:40:18,771 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:40:18,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325956046] [2023-04-03 02:40:18,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325956046] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:40:18,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:40:18,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 02:40:18,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311217314] [2023-04-03 02:40:18,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:40:18,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:40:18,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:40:18,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:40:18,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:40:18,774 INFO L87 Difference]: Start difference. First operand 303 states and 413 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:40:18,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:40:18,964 INFO L93 Difference]: Finished difference Result 719 states and 1011 transitions. [2023-04-03 02:40:18,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 02:40:18,965 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 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 58 [2023-04-03 02:40:18,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:40:18,969 INFO L225 Difference]: With dead ends: 719 [2023-04-03 02:40:18,972 INFO L226 Difference]: Without dead ends: 466 [2023-04-03 02:40:18,977 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-03 02:40:18,979 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 427 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 427 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:40:18,979 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [427 Valid, 180 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:40:18,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2023-04-03 02:40:19,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 464. [2023-04-03 02:40:19,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 460 states have (on average 1.4) internal successors, (644), 460 states have internal predecessors, (644), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:40:19,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 647 transitions. [2023-04-03 02:40:19,056 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 647 transitions. Word has length 58 [2023-04-03 02:40:19,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:40:19,057 INFO L495 AbstractCegarLoop]: Abstraction has 464 states and 647 transitions. [2023-04-03 02:40:19,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:40:19,057 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 647 transitions. [2023-04-03 02:40:19,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-04-03 02:40:19,062 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:40:19,062 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:40:19,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-03 02:40:19,062 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:40:19,062 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:40:19,063 INFO L85 PathProgramCache]: Analyzing trace with hash 1960656173, now seen corresponding path program 1 times [2023-04-03 02:40:19,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:40:19,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061075422] [2023-04-03 02:40:19,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:40:19,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:40:19,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:40:19,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:40:19,213 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:40:19,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061075422] [2023-04-03 02:40:19,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061075422] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:40:19,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:40:19,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 02:40:19,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760664822] [2023-04-03 02:40:19,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:40:19,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:40:19,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:40:19,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:40:19,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:40:19,216 INFO L87 Difference]: Start difference. First operand 464 states and 647 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:40:19,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:40:19,461 INFO L93 Difference]: Finished difference Result 1179 states and 1686 transitions. [2023-04-03 02:40:19,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 02:40:19,462 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 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 58 [2023-04-03 02:40:19,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:40:19,465 INFO L225 Difference]: With dead ends: 1179 [2023-04-03 02:40:19,465 INFO L226 Difference]: Without dead ends: 788 [2023-04-03 02:40:19,468 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-03 02:40:19,472 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 410 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 410 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:40:19,473 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [410 Valid, 188 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:40:19,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2023-04-03 02:40:19,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 786. [2023-04-03 02:40:19,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 786 states, 782 states have (on average 1.4194373401534526) internal successors, (1110), 782 states have internal predecessors, (1110), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:40:19,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 786 states to 786 states and 1113 transitions. [2023-04-03 02:40:19,580 INFO L78 Accepts]: Start accepts. Automaton has 786 states and 1113 transitions. Word has length 58 [2023-04-03 02:40:19,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:40:19,581 INFO L495 AbstractCegarLoop]: Abstraction has 786 states and 1113 transitions. [2023-04-03 02:40:19,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:40:19,582 INFO L276 IsEmpty]: Start isEmpty. Operand 786 states and 1113 transitions. [2023-04-03 02:40:19,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-04-03 02:40:19,582 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:40:19,582 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:40:19,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-03 02:40:19,583 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:40:19,584 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:40:19,584 INFO L85 PathProgramCache]: Analyzing trace with hash -948149956, now seen corresponding path program 1 times [2023-04-03 02:40:19,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:40:19,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096577312] [2023-04-03 02:40:19,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:40:19,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:40:19,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:40:19,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:40:19,734 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:40:19,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096577312] [2023-04-03 02:40:19,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096577312] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:40:19,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:40:19,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 02:40:19,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198556857] [2023-04-03 02:40:19,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:40:19,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:40:19,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:40:19,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:40:19,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:40:19,736 INFO L87 Difference]: Start difference. First operand 786 states and 1113 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:40:20,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:40:20,043 INFO L93 Difference]: Finished difference Result 2118 states and 3055 transitions. [2023-04-03 02:40:20,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 02:40:20,043 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 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 58 [2023-04-03 02:40:20,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:40:20,048 INFO L225 Difference]: With dead ends: 2118 [2023-04-03 02:40:20,049 INFO L226 Difference]: Without dead ends: 1432 [2023-04-03 02:40:20,050 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-03 02:40:20,054 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 393 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 393 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:40:20,054 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [393 Valid, 196 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:40:20,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1432 states. [2023-04-03 02:40:20,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1432 to 1430. [2023-04-03 02:40:20,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1430 states, 1426 states have (on average 1.4305750350631137) internal successors, (2040), 1426 states have internal predecessors, (2040), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:40:20,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1430 states to 1430 states and 2043 transitions. [2023-04-03 02:40:20,229 INFO L78 Accepts]: Start accepts. Automaton has 1430 states and 2043 transitions. Word has length 58 [2023-04-03 02:40:20,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:40:20,229 INFO L495 AbstractCegarLoop]: Abstraction has 1430 states and 2043 transitions. [2023-04-03 02:40:20,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:40:20,230 INFO L276 IsEmpty]: Start isEmpty. Operand 1430 states and 2043 transitions. [2023-04-03 02:40:20,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-04-03 02:40:20,231 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:40:20,231 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] [2023-04-03 02:40:20,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-03 02:40:20,232 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:40:20,232 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:40:20,232 INFO L85 PathProgramCache]: Analyzing trace with hash 567009354, now seen corresponding path program 1 times [2023-04-03 02:40:20,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:40:20,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325660588] [2023-04-03 02:40:20,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:40:20,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:40:20,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:40:21,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:40:21,195 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:40:21,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325660588] [2023-04-03 02:40:21,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325660588] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:40:21,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:40:21,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2023-04-03 02:40:21,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347722714] [2023-04-03 02:40:21,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:40:21,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-04-03 02:40:21,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:40:21,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-04-03 02:40:21,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2023-04-03 02:40:21,197 INFO L87 Difference]: Start difference. First operand 1430 states and 2043 transitions. Second operand has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:40:22,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:40:22,138 INFO L93 Difference]: Finished difference Result 2969 states and 4245 transitions. [2023-04-03 02:40:22,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-04-03 02:40:22,139 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 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 59 [2023-04-03 02:40:22,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:40:22,148 INFO L225 Difference]: With dead ends: 2969 [2023-04-03 02:40:22,148 INFO L226 Difference]: Without dead ends: 2967 [2023-04-03 02:40:22,149 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=204, Invalid=552, Unknown=0, NotChecked=0, Total=756 [2023-04-03 02:40:22,150 INFO L413 NwaCegarLoop]: 183 mSDtfsCounter, 704 mSDsluCounter, 943 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 704 SdHoareTripleChecker+Valid, 1126 SdHoareTripleChecker+Invalid, 537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-03 02:40:22,150 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [704 Valid, 1126 Invalid, 537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 512 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-03 02:40:22,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2967 states. [2023-04-03 02:40:22,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2967 to 2286. [2023-04-03 02:40:22,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2286 states, 2282 states have (on average 1.4285714285714286) internal successors, (3260), 2282 states have internal predecessors, (3260), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:40:22,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2286 states to 2286 states and 3263 transitions. [2023-04-03 02:40:22,428 INFO L78 Accepts]: Start accepts. Automaton has 2286 states and 3263 transitions. Word has length 59 [2023-04-03 02:40:22,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:40:22,428 INFO L495 AbstractCegarLoop]: Abstraction has 2286 states and 3263 transitions. [2023-04-03 02:40:22,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:40:22,428 INFO L276 IsEmpty]: Start isEmpty. Operand 2286 states and 3263 transitions. [2023-04-03 02:40:22,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-04-03 02:40:22,429 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:40:22,429 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] [2023-04-03 02:40:22,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-03 02:40:22,429 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:40:22,429 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:40:22,429 INFO L85 PathProgramCache]: Analyzing trace with hash -1061927766, now seen corresponding path program 1 times [2023-04-03 02:40:22,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:40:22,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504369117] [2023-04-03 02:40:22,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:40:22,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:40:22,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:40:23,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:40:23,753 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:40:23,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504369117] [2023-04-03 02:40:23,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504369117] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:40:23,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:40:23,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2023-04-03 02:40:23,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537894153] [2023-04-03 02:40:23,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:40:23,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-04-03 02:40:23,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:40:23,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-04-03 02:40:23,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2023-04-03 02:40:23,755 INFO L87 Difference]: Start difference. First operand 2286 states and 3263 transitions. Second operand has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 21 states have internal predecessors, (56), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:40:25,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:40:25,249 INFO L93 Difference]: Finished difference Result 3264 states and 4652 transitions. [2023-04-03 02:40:25,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-04-03 02:40:25,249 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 21 states have internal predecessors, (56), 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 59 [2023-04-03 02:40:25,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:40:25,259 INFO L225 Difference]: With dead ends: 3264 [2023-04-03 02:40:25,259 INFO L226 Difference]: Without dead ends: 3262 [2023-04-03 02:40:25,260 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=319, Invalid=1087, Unknown=0, NotChecked=0, Total=1406 [2023-04-03 02:40:25,261 INFO L413 NwaCegarLoop]: 156 mSDtfsCounter, 906 mSDsluCounter, 1148 mSDsCounter, 0 mSdLazyCounter, 1661 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 906 SdHoareTripleChecker+Valid, 1304 SdHoareTripleChecker+Invalid, 1689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-04-03 02:40:25,261 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [906 Valid, 1304 Invalid, 1689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1661 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-04-03 02:40:25,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3262 states. [2023-04-03 02:40:25,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3262 to 2305. [2023-04-03 02:40:25,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2305 states, 2301 states have (on average 1.4263363754889178) internal successors, (3282), 2301 states have internal predecessors, (3282), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:40:25,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2305 states to 2305 states and 3285 transitions. [2023-04-03 02:40:25,514 INFO L78 Accepts]: Start accepts. Automaton has 2305 states and 3285 transitions. Word has length 59 [2023-04-03 02:40:25,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:40:25,515 INFO L495 AbstractCegarLoop]: Abstraction has 2305 states and 3285 transitions. [2023-04-03 02:40:25,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 21 states have internal predecessors, (56), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:40:25,515 INFO L276 IsEmpty]: Start isEmpty. Operand 2305 states and 3285 transitions. [2023-04-03 02:40:25,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-04-03 02:40:25,515 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:40:25,516 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] [2023-04-03 02:40:25,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-03 02:40:25,516 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:40:25,516 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:40:25,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1504941814, now seen corresponding path program 1 times [2023-04-03 02:40:25,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:40:25,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790099844] [2023-04-03 02:40:25,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:40:25,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:40:25,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:40:26,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:40:26,229 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:40:26,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790099844] [2023-04-03 02:40:26,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790099844] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:40:26,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:40:26,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2023-04-03 02:40:26,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720953005] [2023-04-03 02:40:26,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:40:26,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-04-03 02:40:26,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:40:26,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-04-03 02:40:26,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2023-04-03 02:40:26,231 INFO L87 Difference]: Start difference. First operand 2305 states and 3285 transitions. Second operand has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:40:27,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:40:27,170 INFO L93 Difference]: Finished difference Result 2695 states and 3819 transitions. [2023-04-03 02:40:27,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-04-03 02:40:27,171 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 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 59 [2023-04-03 02:40:27,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:40:27,178 INFO L225 Difference]: With dead ends: 2695 [2023-04-03 02:40:27,179 INFO L226 Difference]: Without dead ends: 2693 [2023-04-03 02:40:27,180 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=189, Invalid=513, Unknown=0, NotChecked=0, Total=702 [2023-04-03 02:40:27,181 INFO L413 NwaCegarLoop]: 236 mSDtfsCounter, 722 mSDsluCounter, 1367 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 722 SdHoareTripleChecker+Valid, 1603 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-03 02:40:27,181 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [722 Valid, 1603 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 432 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-03 02:40:27,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2693 states. [2023-04-03 02:40:27,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2693 to 2321. [2023-04-03 02:40:27,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2321 states, 2317 states have (on average 1.423823910228744) internal successors, (3299), 2317 states have internal predecessors, (3299), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:40:27,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2321 states to 2321 states and 3302 transitions. [2023-04-03 02:40:27,520 INFO L78 Accepts]: Start accepts. Automaton has 2321 states and 3302 transitions. Word has length 59 [2023-04-03 02:40:27,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:40:27,521 INFO L495 AbstractCegarLoop]: Abstraction has 2321 states and 3302 transitions. [2023-04-03 02:40:27,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:40:27,521 INFO L276 IsEmpty]: Start isEmpty. Operand 2321 states and 3302 transitions. [2023-04-03 02:40:27,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-04-03 02:40:27,521 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:40:27,521 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] [2023-04-03 02:40:27,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-03 02:40:27,522 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:40:27,522 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:40:27,522 INFO L85 PathProgramCache]: Analyzing trace with hash 1111595537, now seen corresponding path program 1 times [2023-04-03 02:40:27,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:40:27,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990631447] [2023-04-03 02:40:27,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:40:27,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:40:27,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:40:27,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:40:27,577 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:40:27,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990631447] [2023-04-03 02:40:27,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990631447] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:40:27,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:40:27,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 02:40:27,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381558147] [2023-04-03 02:40:27,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:40:27,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:40:27,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:40:27,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:40:27,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:40:27,578 INFO L87 Difference]: Start difference. First operand 2321 states and 3302 transitions. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:40:27,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:40:27,872 INFO L93 Difference]: Finished difference Result 3699 states and 5287 transitions. [2023-04-03 02:40:27,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 02:40:27,873 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 4 states have internal predecessors, (56), 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 59 [2023-04-03 02:40:27,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:40:27,879 INFO L225 Difference]: With dead ends: 3699 [2023-04-03 02:40:27,879 INFO L226 Difference]: Without dead ends: 2321 [2023-04-03 02:40:27,883 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-03 02:40:27,884 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 347 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:40:27,884 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [347 Valid, 141 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:40:27,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2321 states. [2023-04-03 02:40:28,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2321 to 2321. [2023-04-03 02:40:28,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2321 states, 2317 states have (on average 1.4233923176521364) internal successors, (3298), 2317 states have internal predecessors, (3298), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:40:28,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2321 states to 2321 states and 3301 transitions. [2023-04-03 02:40:28,158 INFO L78 Accepts]: Start accepts. Automaton has 2321 states and 3301 transitions. Word has length 59 [2023-04-03 02:40:28,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:40:28,159 INFO L495 AbstractCegarLoop]: Abstraction has 2321 states and 3301 transitions. [2023-04-03 02:40:28,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:40:28,159 INFO L276 IsEmpty]: Start isEmpty. Operand 2321 states and 3301 transitions. [2023-04-03 02:40:28,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-04-03 02:40:28,159 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:40:28,159 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] [2023-04-03 02:40:28,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-03 02:40:28,160 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:40:28,160 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:40:28,160 INFO L85 PathProgramCache]: Analyzing trace with hash -1018694872, now seen corresponding path program 1 times [2023-04-03 02:40:28,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:40:28,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362967801] [2023-04-03 02:40:28,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:40:28,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:40:28,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:40:28,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:40:28,883 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:40:28,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362967801] [2023-04-03 02:40:28,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362967801] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:40:28,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:40:28,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2023-04-03 02:40:28,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778544272] [2023-04-03 02:40:28,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:40:28,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-04-03 02:40:28,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:40:28,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-04-03 02:40:28,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2023-04-03 02:40:28,884 INFO L87 Difference]: Start difference. First operand 2321 states and 3301 transitions. Second operand has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 states have internal predecessors, (57), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:40:30,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:40:30,237 INFO L93 Difference]: Finished difference Result 4669 states and 6686 transitions. [2023-04-03 02:40:30,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-04-03 02:40:30,238 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 states have internal predecessors, (57), 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 60 [2023-04-03 02:40:30,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:40:30,249 INFO L225 Difference]: With dead ends: 4669 [2023-04-03 02:40:30,249 INFO L226 Difference]: Without dead ends: 4667 [2023-04-03 02:40:30,250 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=208, Invalid=548, Unknown=0, NotChecked=0, Total=756 [2023-04-03 02:40:30,250 INFO L413 NwaCegarLoop]: 263 mSDtfsCounter, 535 mSDsluCounter, 1955 mSDsCounter, 0 mSdLazyCounter, 1054 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 535 SdHoareTripleChecker+Valid, 2218 SdHoareTripleChecker+Invalid, 1073 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1054 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-03 02:40:30,250 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [535 Valid, 2218 Invalid, 1073 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1054 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-03 02:40:30,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4667 states. [2023-04-03 02:40:30,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4667 to 2790. [2023-04-03 02:40:30,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2790 states, 2786 states have (on average 1.4267767408470926) internal successors, (3975), 2786 states have internal predecessors, (3975), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:40:30,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2790 states to 2790 states and 3978 transitions. [2023-04-03 02:40:30,569 INFO L78 Accepts]: Start accepts. Automaton has 2790 states and 3978 transitions. Word has length 60 [2023-04-03 02:40:30,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:40:30,569 INFO L495 AbstractCegarLoop]: Abstraction has 2790 states and 3978 transitions. [2023-04-03 02:40:30,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 states have internal predecessors, (57), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:40:30,569 INFO L276 IsEmpty]: Start isEmpty. Operand 2790 states and 3978 transitions. [2023-04-03 02:40:30,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-04-03 02:40:30,570 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:40:30,570 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:40:30,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-03 02:40:30,570 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:40:30,570 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:40:30,571 INFO L85 PathProgramCache]: Analyzing trace with hash -1161744193, now seen corresponding path program 1 times [2023-04-03 02:40:30,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:40:30,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407905673] [2023-04-03 02:40:30,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:40:30,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:40:30,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:40:31,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:40:31,254 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:40:31,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407905673] [2023-04-03 02:40:31,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407905673] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:40:31,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:40:31,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2023-04-03 02:40:31,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444396168] [2023-04-03 02:40:31,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:40:31,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-04-03 02:40:31,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:40:31,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-04-03 02:40:31,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2023-04-03 02:40:31,255 INFO L87 Difference]: Start difference. First operand 2790 states and 3978 transitions. Second operand has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:40:32,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:40:32,249 INFO L93 Difference]: Finished difference Result 4448 states and 6329 transitions. [2023-04-03 02:40:32,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-04-03 02:40:32,250 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 61 [2023-04-03 02:40:32,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:40:32,260 INFO L225 Difference]: With dead ends: 4448 [2023-04-03 02:40:32,260 INFO L226 Difference]: Without dead ends: 3710 [2023-04-03 02:40:32,262 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=217, Invalid=595, Unknown=0, NotChecked=0, Total=812 [2023-04-03 02:40:32,263 INFO L413 NwaCegarLoop]: 253 mSDtfsCounter, 622 mSDsluCounter, 1362 mSDsCounter, 0 mSdLazyCounter, 447 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 622 SdHoareTripleChecker+Valid, 1615 SdHoareTripleChecker+Invalid, 474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-03 02:40:32,263 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [622 Valid, 1615 Invalid, 474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 447 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-03 02:40:32,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3710 states. [2023-04-03 02:40:32,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3710 to 3110. [2023-04-03 02:40:32,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3110 states, 3106 states have (on average 1.425949774629749) internal successors, (4429), 3106 states have internal predecessors, (4429), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:40:32,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3110 states to 3110 states and 4432 transitions. [2023-04-03 02:40:32,663 INFO L78 Accepts]: Start accepts. Automaton has 3110 states and 4432 transitions. Word has length 61 [2023-04-03 02:40:32,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:40:32,663 INFO L495 AbstractCegarLoop]: Abstraction has 3110 states and 4432 transitions. [2023-04-03 02:40:32,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:40:32,663 INFO L276 IsEmpty]: Start isEmpty. Operand 3110 states and 4432 transitions. [2023-04-03 02:40:32,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-04-03 02:40:32,664 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:40:32,664 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:40:32,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-03 02:40:32,664 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:40:32,664 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:40:32,664 INFO L85 PathProgramCache]: Analyzing trace with hash -1604758241, now seen corresponding path program 1 times [2023-04-03 02:40:32,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:40:32,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159219450] [2023-04-03 02:40:32,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:40:32,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:40:32,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:40:33,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:40:33,324 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:40:33,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159219450] [2023-04-03 02:40:33,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159219450] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:40:33,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:40:33,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2023-04-03 02:40:33,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005900293] [2023-04-03 02:40:33,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:40:33,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-04-03 02:40:33,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:40:33,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-04-03 02:40:33,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2023-04-03 02:40:33,325 INFO L87 Difference]: Start difference. First operand 3110 states and 4432 transitions. Second operand has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:40:34,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:40:34,502 INFO L93 Difference]: Finished difference Result 5478 states and 7819 transitions. [2023-04-03 02:40:34,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-04-03 02:40:34,504 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 61 [2023-04-03 02:40:34,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:40:34,516 INFO L225 Difference]: With dead ends: 5478 [2023-04-03 02:40:34,516 INFO L226 Difference]: Without dead ends: 5476 [2023-04-03 02:40:34,517 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=216, Invalid=596, Unknown=0, NotChecked=0, Total=812 [2023-04-03 02:40:34,518 INFO L413 NwaCegarLoop]: 183 mSDtfsCounter, 749 mSDsluCounter, 716 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 749 SdHoareTripleChecker+Valid, 899 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-03 02:40:34,518 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [749 Valid, 899 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-03 02:40:34,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5476 states. [2023-04-03 02:40:34,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5476 to 3109. [2023-04-03 02:40:34,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3109 states, 3105 states have (on average 1.4254428341384864) internal successors, (4426), 3105 states have internal predecessors, (4426), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:40:34,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3109 states to 3109 states and 4429 transitions. [2023-04-03 02:40:34,907 INFO L78 Accepts]: Start accepts. Automaton has 3109 states and 4429 transitions. Word has length 61 [2023-04-03 02:40:34,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:40:34,907 INFO L495 AbstractCegarLoop]: Abstraction has 3109 states and 4429 transitions. [2023-04-03 02:40:34,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:40:34,907 INFO L276 IsEmpty]: Start isEmpty. Operand 3109 states and 4429 transitions. [2023-04-03 02:40:34,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-04-03 02:40:34,908 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:40:34,908 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:40:34,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-04-03 02:40:34,908 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:40:34,909 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:40:34,909 INFO L85 PathProgramCache]: Analyzing trace with hash 649732479, now seen corresponding path program 1 times [2023-04-03 02:40:34,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:40:34,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834638100] [2023-04-03 02:40:34,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:40:34,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:40:34,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:40:35,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:40:35,596 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:40:35,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834638100] [2023-04-03 02:40:35,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834638100] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:40:35,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:40:35,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2023-04-03 02:40:35,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822228192] [2023-04-03 02:40:35,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:40:35,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-04-03 02:40:35,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:40:35,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-04-03 02:40:35,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2023-04-03 02:40:35,598 INFO L87 Difference]: Start difference. First operand 3109 states and 4429 transitions. Second operand has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:40:36,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:40:36,569 INFO L93 Difference]: Finished difference Result 3678 states and 5217 transitions. [2023-04-03 02:40:36,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-04-03 02:40:36,569 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 61 [2023-04-03 02:40:36,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:40:36,576 INFO L225 Difference]: With dead ends: 3678 [2023-04-03 02:40:36,576 INFO L226 Difference]: Without dead ends: 3676 [2023-04-03 02:40:36,577 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=203, Invalid=553, Unknown=0, NotChecked=0, Total=756 [2023-04-03 02:40:36,578 INFO L413 NwaCegarLoop]: 244 mSDtfsCounter, 505 mSDsluCounter, 1516 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 505 SdHoareTripleChecker+Valid, 1760 SdHoareTripleChecker+Invalid, 636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-03 02:40:36,578 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [505 Valid, 1760 Invalid, 636 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 614 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-03 02:40:36,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3676 states. [2023-04-03 02:40:36,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3676 to 3122. [2023-04-03 02:40:36,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3122 states, 3118 states have (on average 1.4246311738293778) internal successors, (4442), 3118 states have internal predecessors, (4442), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:40:36,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3122 states to 3122 states and 4445 transitions. [2023-04-03 02:40:36,977 INFO L78 Accepts]: Start accepts. Automaton has 3122 states and 4445 transitions. Word has length 61 [2023-04-03 02:40:36,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:40:36,977 INFO L495 AbstractCegarLoop]: Abstraction has 3122 states and 4445 transitions. [2023-04-03 02:40:36,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:40:36,978 INFO L276 IsEmpty]: Start isEmpty. Operand 3122 states and 4445 transitions. [2023-04-03 02:40:36,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-04-03 02:40:36,978 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:40:36,979 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] [2023-04-03 02:40:36,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-04-03 02:40:36,979 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:40:36,979 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:40:36,979 INFO L85 PathProgramCache]: Analyzing trace with hash -348804855, now seen corresponding path program 1 times [2023-04-03 02:40:36,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:40:36,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866961237] [2023-04-03 02:40:36,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:40:36,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:40:36,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:40:37,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:40:37,008 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:40:37,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866961237] [2023-04-03 02:40:37,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866961237] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:40:37,008 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:40:37,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:40:37,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997410939] [2023-04-03 02:40:37,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:40:37,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:40:37,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:40:37,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:40:37,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:40:37,009 INFO L87 Difference]: Start difference. First operand 3122 states and 4445 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:40:37,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:40:37,411 INFO L93 Difference]: Finished difference Result 5181 states and 7418 transitions. [2023-04-03 02:40:37,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:40:37,411 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 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 62 [2023-04-03 02:40:37,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:40:37,416 INFO L225 Difference]: With dead ends: 5181 [2023-04-03 02:40:37,416 INFO L226 Difference]: Without dead ends: 3005 [2023-04-03 02:40:37,419 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:40:37,420 INFO L413 NwaCegarLoop]: 199 mSDtfsCounter, 103 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:40:37,420 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 275 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:40:37,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3005 states. [2023-04-03 02:40:37,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3005 to 3002. [2023-04-03 02:40:37,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3002 states, 2998 states have (on average 1.4222815210140094) internal successors, (4264), 2998 states have internal predecessors, (4264), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:40:37,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3002 states to 3002 states and 4267 transitions. [2023-04-03 02:40:37,808 INFO L78 Accepts]: Start accepts. Automaton has 3002 states and 4267 transitions. Word has length 62 [2023-04-03 02:40:37,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:40:37,809 INFO L495 AbstractCegarLoop]: Abstraction has 3002 states and 4267 transitions. [2023-04-03 02:40:37,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:40:37,809 INFO L276 IsEmpty]: Start isEmpty. Operand 3002 states and 4267 transitions. [2023-04-03 02:40:37,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-04-03 02:40:37,810 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:40:37,810 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] [2023-04-03 02:40:37,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-04-03 02:40:37,810 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:40:37,810 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:40:37,810 INFO L85 PathProgramCache]: Analyzing trace with hash -1245854708, now seen corresponding path program 1 times [2023-04-03 02:40:37,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:40:37,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559313999] [2023-04-03 02:40:37,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:40:37,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:40:37,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:40:37,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:40:37,838 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:40:37,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559313999] [2023-04-03 02:40:37,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559313999] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:40:37,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:40:37,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:40:37,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972243470] [2023-04-03 02:40:37,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:40:37,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:40:37,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:40:37,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:40:37,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:40:37,839 INFO L87 Difference]: Start difference. First operand 3002 states and 4267 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:40:38,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:40:38,230 INFO L93 Difference]: Finished difference Result 5538 states and 7924 transitions. [2023-04-03 02:40:38,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:40:38,231 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 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 62 [2023-04-03 02:40:38,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:40:38,235 INFO L225 Difference]: With dead ends: 5538 [2023-04-03 02:40:38,235 INFO L226 Difference]: Without dead ends: 2910 [2023-04-03 02:40:38,239 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:40:38,239 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 96 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:40:38,240 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 275 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:40:38,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2910 states. [2023-04-03 02:40:38,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2910 to 2886. [2023-04-03 02:40:38,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2886 states, 2882 states have (on average 1.4191533657182511) internal successors, (4090), 2882 states have internal predecessors, (4090), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:40:38,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2886 states to 2886 states and 4093 transitions. [2023-04-03 02:40:38,626 INFO L78 Accepts]: Start accepts. Automaton has 2886 states and 4093 transitions. Word has length 62 [2023-04-03 02:40:38,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:40:38,626 INFO L495 AbstractCegarLoop]: Abstraction has 2886 states and 4093 transitions. [2023-04-03 02:40:38,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:40:38,627 INFO L276 IsEmpty]: Start isEmpty. Operand 2886 states and 4093 transitions. [2023-04-03 02:40:38,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-04-03 02:40:38,627 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:40:38,627 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] [2023-04-03 02:40:38,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-04-03 02:40:38,628 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:40:38,628 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:40:38,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1318821821, now seen corresponding path program 1 times [2023-04-03 02:40:38,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:40:38,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932692291] [2023-04-03 02:40:38,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:40:38,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:40:38,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:40:39,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:40:39,849 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:40:39,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932692291] [2023-04-03 02:40:39,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932692291] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:40:39,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:40:39,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2023-04-03 02:40:39,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398636150] [2023-04-03 02:40:39,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:40:39,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-04-03 02:40:39,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:40:39,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-04-03 02:40:39,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2023-04-03 02:40:39,851 INFO L87 Difference]: Start difference. First operand 2886 states and 4093 transitions. Second operand has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 22 states have internal predecessors, (59), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:40:42,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:40:42,045 INFO L93 Difference]: Finished difference Result 5092 states and 7246 transitions. [2023-04-03 02:40:42,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-04-03 02:40:42,046 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 22 states have internal predecessors, (59), 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 62 [2023-04-03 02:40:42,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:40:42,052 INFO L225 Difference]: With dead ends: 5092 [2023-04-03 02:40:42,052 INFO L226 Difference]: Without dead ends: 5090 [2023-04-03 02:40:42,053 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=355, Invalid=1205, Unknown=0, NotChecked=0, Total=1560 [2023-04-03 02:40:42,053 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 884 mSDsluCounter, 1053 mSDsCounter, 0 mSdLazyCounter, 1499 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 884 SdHoareTripleChecker+Valid, 1169 SdHoareTripleChecker+Invalid, 1524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-04-03 02:40:42,053 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [884 Valid, 1169 Invalid, 1524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1499 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-04-03 02:40:42,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5090 states. [2023-04-03 02:40:42,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5090 to 2876. [2023-04-03 02:40:42,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2876 states, 2872 states have (on average 1.4206128133704736) internal successors, (4080), 2872 states have internal predecessors, (4080), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:40:42,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2876 states to 2876 states and 4083 transitions. [2023-04-03 02:40:42,463 INFO L78 Accepts]: Start accepts. Automaton has 2876 states and 4083 transitions. Word has length 62 [2023-04-03 02:40:42,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:40:42,463 INFO L495 AbstractCegarLoop]: Abstraction has 2876 states and 4083 transitions. [2023-04-03 02:40:42,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 22 states have internal predecessors, (59), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:40:42,463 INFO L276 IsEmpty]: Start isEmpty. Operand 2876 states and 4083 transitions. [2023-04-03 02:40:42,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-04-03 02:40:42,464 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:40:42,464 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:40:42,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-04-03 02:40:42,464 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:40:42,464 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:40:42,465 INFO L85 PathProgramCache]: Analyzing trace with hash -310115299, now seen corresponding path program 1 times [2023-04-03 02:40:42,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:40:42,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845516165] [2023-04-03 02:40:42,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:40:42,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:40:42,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:40:43,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:40:43,131 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:40:43,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845516165] [2023-04-03 02:40:43,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845516165] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:40:43,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:40:43,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2023-04-03 02:40:43,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800608317] [2023-04-03 02:40:43,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:40:43,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-04-03 02:40:43,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:40:43,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-04-03 02:40:43,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2023-04-03 02:40:43,133 INFO L87 Difference]: Start difference. First operand 2876 states and 4083 transitions. Second operand has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 17 states have internal predecessors, (59), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:40:44,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:40:44,408 INFO L93 Difference]: Finished difference Result 6261 states and 8926 transitions. [2023-04-03 02:40:44,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-04-03 02:40:44,409 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 17 states have internal predecessors, (59), 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 62 [2023-04-03 02:40:44,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:40:44,415 INFO L225 Difference]: With dead ends: 6261 [2023-04-03 02:40:44,415 INFO L226 Difference]: Without dead ends: 5555 [2023-04-03 02:40:44,417 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=198, Invalid=558, Unknown=0, NotChecked=0, Total=756 [2023-04-03 02:40:44,417 INFO L413 NwaCegarLoop]: 245 mSDtfsCounter, 543 mSDsluCounter, 1534 mSDsCounter, 0 mSdLazyCounter, 485 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 543 SdHoareTripleChecker+Valid, 1779 SdHoareTripleChecker+Invalid, 515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-03 02:40:44,417 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [543 Valid, 1779 Invalid, 515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 485 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-03 02:40:44,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5555 states. [2023-04-03 02:40:45,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5555 to 3164. [2023-04-03 02:40:45,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3164 states, 3160 states have (on average 1.4158227848101266) internal successors, (4474), 3160 states have internal predecessors, (4474), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:40:45,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3164 states to 3164 states and 4477 transitions. [2023-04-03 02:40:45,090 INFO L78 Accepts]: Start accepts. Automaton has 3164 states and 4477 transitions. Word has length 62 [2023-04-03 02:40:45,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:40:45,090 INFO L495 AbstractCegarLoop]: Abstraction has 3164 states and 4477 transitions. [2023-04-03 02:40:45,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 17 states have internal predecessors, (59), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:40:45,090 INFO L276 IsEmpty]: Start isEmpty. Operand 3164 states and 4477 transitions. [2023-04-03 02:40:45,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-04-03 02:40:45,091 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:40:45,091 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] [2023-04-03 02:40:45,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-04-03 02:40:45,091 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:40:45,091 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:40:45,091 INFO L85 PathProgramCache]: Analyzing trace with hash -753129347, now seen corresponding path program 1 times [2023-04-03 02:40:45,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:40:45,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274301483] [2023-04-03 02:40:45,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:40:45,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:40:45,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:40:45,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:40:45,822 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:40:45,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274301483] [2023-04-03 02:40:45,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274301483] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:40:45,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:40:45,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2023-04-03 02:40:45,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761498812] [2023-04-03 02:40:45,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:40:45,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-04-03 02:40:45,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:40:45,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-04-03 02:40:45,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2023-04-03 02:40:45,824 INFO L87 Difference]: Start difference. First operand 3164 states and 4477 transitions. Second operand has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 17 states have internal predecessors, (59), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:40:47,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:40:47,553 INFO L93 Difference]: Finished difference Result 5320 states and 7491 transitions. [2023-04-03 02:40:47,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-04-03 02:40:47,553 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 17 states have internal predecessors, (59), 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 62 [2023-04-03 02:40:47,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:40:47,560 INFO L225 Difference]: With dead ends: 5320 [2023-04-03 02:40:47,560 INFO L226 Difference]: Without dead ends: 5318 [2023-04-03 02:40:47,561 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=252, Invalid=678, Unknown=0, NotChecked=0, Total=930 [2023-04-03 02:40:47,561 INFO L413 NwaCegarLoop]: 270 mSDtfsCounter, 568 mSDsluCounter, 1789 mSDsCounter, 0 mSdLazyCounter, 830 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 568 SdHoareTripleChecker+Valid, 2059 SdHoareTripleChecker+Invalid, 857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 830 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-03 02:40:47,562 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [568 Valid, 2059 Invalid, 857 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 830 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-03 02:40:47,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5318 states. [2023-04-03 02:40:48,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5318 to 3164. [2023-04-03 02:40:48,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3164 states, 3160 states have (on average 1.4158227848101266) internal successors, (4474), 3160 states have internal predecessors, (4474), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:40:48,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3164 states to 3164 states and 4477 transitions. [2023-04-03 02:40:48,088 INFO L78 Accepts]: Start accepts. Automaton has 3164 states and 4477 transitions. Word has length 62 [2023-04-03 02:40:48,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:40:48,088 INFO L495 AbstractCegarLoop]: Abstraction has 3164 states and 4477 transitions. [2023-04-03 02:40:48,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 17 states have internal predecessors, (59), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:40:48,088 INFO L276 IsEmpty]: Start isEmpty. Operand 3164 states and 4477 transitions. [2023-04-03 02:40:48,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-04-03 02:40:48,089 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:40:48,089 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] [2023-04-03 02:40:48,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-04-03 02:40:48,089 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:40:48,089 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:40:48,089 INFO L85 PathProgramCache]: Analyzing trace with hash -784573356, now seen corresponding path program 1 times [2023-04-03 02:40:48,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:40:48,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360088778] [2023-04-03 02:40:48,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:40:48,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:40:48,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:40:49,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:40:49,373 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:40:49,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360088778] [2023-04-03 02:40:49,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360088778] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:40:49,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:40:49,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2023-04-03 02:40:49,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546235558] [2023-04-03 02:40:49,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:40:49,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-04-03 02:40:49,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:40:49,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-04-03 02:40:49,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2023-04-03 02:40:49,374 INFO L87 Difference]: Start difference. First operand 3164 states and 4477 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 23 states have internal predecessors, (60), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:40:51,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:40:51,630 INFO L93 Difference]: Finished difference Result 3704 states and 5221 transitions. [2023-04-03 02:40:51,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-04-03 02:40:51,631 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 23 states have internal predecessors, (60), 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 63 [2023-04-03 02:40:51,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:40:51,635 INFO L225 Difference]: With dead ends: 3704 [2023-04-03 02:40:51,635 INFO L226 Difference]: Without dead ends: 3702 [2023-04-03 02:40:51,636 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=350, Invalid=1290, Unknown=0, NotChecked=0, Total=1640 [2023-04-03 02:40:51,636 INFO L413 NwaCegarLoop]: 219 mSDtfsCounter, 666 mSDsluCounter, 2171 mSDsCounter, 0 mSdLazyCounter, 1557 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 666 SdHoareTripleChecker+Valid, 2390 SdHoareTripleChecker+Invalid, 1578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-04-03 02:40:51,637 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [666 Valid, 2390 Invalid, 1578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1557 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-04-03 02:40:51,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3702 states. [2023-04-03 02:40:52,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3702 to 3161. [2023-04-03 02:40:52,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3161 states, 3157 states have (on average 1.4159011719987329) internal successors, (4470), 3157 states have internal predecessors, (4470), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:40:52,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3161 states to 3161 states and 4473 transitions. [2023-04-03 02:40:52,176 INFO L78 Accepts]: Start accepts. Automaton has 3161 states and 4473 transitions. Word has length 63 [2023-04-03 02:40:52,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:40:52,177 INFO L495 AbstractCegarLoop]: Abstraction has 3161 states and 4473 transitions. [2023-04-03 02:40:52,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 23 states have internal predecessors, (60), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:40:52,177 INFO L276 IsEmpty]: Start isEmpty. Operand 3161 states and 4473 transitions. [2023-04-03 02:40:52,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-04-03 02:40:52,177 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:40:52,177 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] [2023-04-03 02:40:52,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-04-03 02:40:52,178 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:40:52,178 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:40:52,178 INFO L85 PathProgramCache]: Analyzing trace with hash -1785303544, now seen corresponding path program 1 times [2023-04-03 02:40:52,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:40:52,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429488967] [2023-04-03 02:40:52,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:40:52,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:40:52,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:40:52,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:40:52,205 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:40:52,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429488967] [2023-04-03 02:40:52,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429488967] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:40:52,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:40:52,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:40:52,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495304722] [2023-04-03 02:40:52,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:40:52,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:40:52,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:40:52,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:40:52,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:40:52,206 INFO L87 Difference]: Start difference. First operand 3161 states and 4473 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:40:52,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:40:52,741 INFO L93 Difference]: Finished difference Result 5364 states and 7626 transitions. [2023-04-03 02:40:52,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:40:52,741 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 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 63 [2023-04-03 02:40:52,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:40:52,744 INFO L225 Difference]: With dead ends: 5364 [2023-04-03 02:40:52,744 INFO L226 Difference]: Without dead ends: 3020 [2023-04-03 02:40:52,763 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:40:52,763 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 97 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:40:52,763 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 263 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:40:52,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3020 states. [2023-04-03 02:40:53,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3020 to 3018. [2023-04-03 02:40:53,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3018 states, 3014 states have (on average 1.4143994691439947) internal successors, (4263), 3014 states have internal predecessors, (4263), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:40:53,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3018 states to 3018 states and 4266 transitions. [2023-04-03 02:40:53,284 INFO L78 Accepts]: Start accepts. Automaton has 3018 states and 4266 transitions. Word has length 63 [2023-04-03 02:40:53,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:40:53,284 INFO L495 AbstractCegarLoop]: Abstraction has 3018 states and 4266 transitions. [2023-04-03 02:40:53,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:40:53,284 INFO L276 IsEmpty]: Start isEmpty. Operand 3018 states and 4266 transitions. [2023-04-03 02:40:53,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-04-03 02:40:53,285 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:40:53,285 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:40:53,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-04-03 02:40:53,285 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:40:53,285 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:40:53,285 INFO L85 PathProgramCache]: Analyzing trace with hash -224469134, now seen corresponding path program 1 times [2023-04-03 02:40:53,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:40:53,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606895424] [2023-04-03 02:40:53,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:40:53,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:40:53,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:40:55,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:40:55,438 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:40:55,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606895424] [2023-04-03 02:40:55,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606895424] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:40:55,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:40:55,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2023-04-03 02:40:55,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904373535] [2023-04-03 02:40:55,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:40:55,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-04-03 02:40:55,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:40:55,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-04-03 02:40:55,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=661, Unknown=0, NotChecked=0, Total=756 [2023-04-03 02:40:55,439 INFO L87 Difference]: Start difference. First operand 3018 states and 4266 transitions. Second operand has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 27 states have internal predecessors, (61), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:40:59,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:40:59,971 INFO L93 Difference]: Finished difference Result 4278 states and 6044 transitions. [2023-04-03 02:40:59,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-04-03 02:40:59,972 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 27 states have internal predecessors, (61), 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 64 [2023-04-03 02:40:59,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:40:59,977 INFO L225 Difference]: With dead ends: 4278 [2023-04-03 02:40:59,977 INFO L226 Difference]: Without dead ends: 3940 [2023-04-03 02:40:59,978 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=721, Invalid=2471, Unknown=0, NotChecked=0, Total=3192 [2023-04-03 02:40:59,979 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 1008 mSDsluCounter, 1102 mSDsCounter, 0 mSdLazyCounter, 2020 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1008 SdHoareTripleChecker+Valid, 1248 SdHoareTripleChecker+Invalid, 2058 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 2020 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-04-03 02:40:59,979 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1008 Valid, 1248 Invalid, 2058 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 2020 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-04-03 02:40:59,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3940 states. [2023-04-03 02:41:00,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3940 to 3002. [2023-04-03 02:41:00,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3002 states, 2998 states have (on average 1.4162775183455638) internal successors, (4246), 2998 states have internal predecessors, (4246), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:41:00,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3002 states to 3002 states and 4249 transitions. [2023-04-03 02:41:00,556 INFO L78 Accepts]: Start accepts. Automaton has 3002 states and 4249 transitions. Word has length 64 [2023-04-03 02:41:00,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:41:00,556 INFO L495 AbstractCegarLoop]: Abstraction has 3002 states and 4249 transitions. [2023-04-03 02:41:00,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 27 states have internal predecessors, (61), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:41:00,557 INFO L276 IsEmpty]: Start isEmpty. Operand 3002 states and 4249 transitions. [2023-04-03 02:41:00,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-04-03 02:41:00,557 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:41:00,557 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:41:00,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-04-03 02:41:00,557 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:41:00,558 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:41:00,558 INFO L85 PathProgramCache]: Analyzing trace with hash -667483182, now seen corresponding path program 1 times [2023-04-03 02:41:00,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:41:00,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141398411] [2023-04-03 02:41:00,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:41:00,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:41:00,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:41:02,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:41:02,390 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:41:02,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141398411] [2023-04-03 02:41:02,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141398411] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:41:02,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:41:02,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2023-04-03 02:41:02,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231386585] [2023-04-03 02:41:02,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:41:02,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-04-03 02:41:02,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:41:02,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-04-03 02:41:02,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=716, Unknown=0, NotChecked=0, Total=812 [2023-04-03 02:41:02,392 INFO L87 Difference]: Start difference. First operand 3002 states and 4249 transitions. Second operand has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:41:06,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:41:06,532 INFO L93 Difference]: Finished difference Result 4546 states and 6424 transitions. [2023-04-03 02:41:06,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-04-03 02:41:06,532 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 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 64 [2023-04-03 02:41:06,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:41:06,537 INFO L225 Difference]: With dead ends: 4546 [2023-04-03 02:41:06,537 INFO L226 Difference]: Without dead ends: 4544 [2023-04-03 02:41:06,538 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=708, Invalid=2484, Unknown=0, NotChecked=0, Total=3192 [2023-04-03 02:41:06,538 INFO L413 NwaCegarLoop]: 164 mSDtfsCounter, 997 mSDsluCounter, 1940 mSDsCounter, 0 mSdLazyCounter, 2948 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 997 SdHoareTripleChecker+Valid, 2104 SdHoareTripleChecker+Invalid, 2983 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 2948 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-04-03 02:41:06,538 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [997 Valid, 2104 Invalid, 2983 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 2948 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-04-03 02:41:06,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4544 states. [2023-04-03 02:41:07,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4544 to 2998. [2023-04-03 02:41:07,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2998 states, 2994 states have (on average 1.416499665998664) internal successors, (4241), 2994 states have internal predecessors, (4241), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:41:07,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2998 states to 2998 states and 4244 transitions. [2023-04-03 02:41:07,129 INFO L78 Accepts]: Start accepts. Automaton has 2998 states and 4244 transitions. Word has length 64 [2023-04-03 02:41:07,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:41:07,129 INFO L495 AbstractCegarLoop]: Abstraction has 2998 states and 4244 transitions. [2023-04-03 02:41:07,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:41:07,129 INFO L276 IsEmpty]: Start isEmpty. Operand 2998 states and 4244 transitions. [2023-04-03 02:41:07,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-04-03 02:41:07,130 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:41:07,130 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:41:07,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-04-03 02:41:07,130 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:41:07,130 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:41:07,130 INFO L85 PathProgramCache]: Analyzing trace with hash 1587007538, now seen corresponding path program 1 times [2023-04-03 02:41:07,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:41:07,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429208038] [2023-04-03 02:41:07,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:41:07,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:41:07,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:41:08,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:41:08,563 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:41:08,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429208038] [2023-04-03 02:41:08,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429208038] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:41:08,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:41:08,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2023-04-03 02:41:08,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787894545] [2023-04-03 02:41:08,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:41:08,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-04-03 02:41:08,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:41:08,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-04-03 02:41:08,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2023-04-03 02:41:08,565 INFO L87 Difference]: Start difference. First operand 2998 states and 4244 transitions. Second operand has 25 states, 25 states have (on average 2.44) internal successors, (61), 24 states have internal predecessors, (61), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:41:11,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:41:11,580 INFO L93 Difference]: Finished difference Result 3349 states and 4720 transitions. [2023-04-03 02:41:11,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-04-03 02:41:11,580 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 24 states have internal predecessors, (61), 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 64 [2023-04-03 02:41:11,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:41:11,584 INFO L225 Difference]: With dead ends: 3349 [2023-04-03 02:41:11,584 INFO L226 Difference]: Without dead ends: 3347 [2023-04-03 02:41:11,585 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 470 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=553, Invalid=1703, Unknown=0, NotChecked=0, Total=2256 [2023-04-03 02:41:11,586 INFO L413 NwaCegarLoop]: 152 mSDtfsCounter, 588 mSDsluCounter, 1579 mSDsCounter, 0 mSdLazyCounter, 2697 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 588 SdHoareTripleChecker+Valid, 1731 SdHoareTripleChecker+Invalid, 2722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 2697 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-04-03 02:41:11,586 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [588 Valid, 1731 Invalid, 2722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 2697 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-04-03 02:41:11,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3347 states. [2023-04-03 02:41:12,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3347 to 2998. [2023-04-03 02:41:12,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2998 states, 2994 states have (on average 1.416499665998664) internal successors, (4241), 2994 states have internal predecessors, (4241), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:41:12,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2998 states to 2998 states and 4244 transitions. [2023-04-03 02:41:12,333 INFO L78 Accepts]: Start accepts. Automaton has 2998 states and 4244 transitions. Word has length 64 [2023-04-03 02:41:12,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:41:12,338 INFO L495 AbstractCegarLoop]: Abstraction has 2998 states and 4244 transitions. [2023-04-03 02:41:12,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 24 states have internal predecessors, (61), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:41:12,338 INFO L276 IsEmpty]: Start isEmpty. Operand 2998 states and 4244 transitions. [2023-04-03 02:41:12,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-04-03 02:41:12,338 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:41:12,338 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] [2023-04-03 02:41:12,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-04-03 02:41:12,339 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:41:12,352 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:41:12,353 INFO L85 PathProgramCache]: Analyzing trace with hash -2006373817, now seen corresponding path program 1 times [2023-04-03 02:41:12,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:41:12,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993582413] [2023-04-03 02:41:12,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:41:12,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:41:12,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:41:16,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:41:16,034 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:41:16,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993582413] [2023-04-03 02:41:16,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993582413] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:41:16,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:41:16,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2023-04-03 02:41:16,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055439468] [2023-04-03 02:41:16,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:41:16,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-04-03 02:41:16,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:41:16,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-04-03 02:41:16,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1059, Unknown=0, NotChecked=0, Total=1190 [2023-04-03 02:41:16,036 INFO L87 Difference]: Start difference. First operand 2998 states and 4244 transitions. Second operand has 35 states, 35 states have (on average 1.8) internal successors, (63), 35 states have internal predecessors, (63), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:41:21,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:41:21,495 INFO L93 Difference]: Finished difference Result 3332 states and 4703 transitions. [2023-04-03 02:41:21,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-04-03 02:41:21,496 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8) internal successors, (63), 35 states have internal predecessors, (63), 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 66 [2023-04-03 02:41:21,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:41:21,499 INFO L225 Difference]: With dead ends: 3332 [2023-04-03 02:41:21,499 INFO L226 Difference]: Without dead ends: 3330 [2023-04-03 02:41:21,500 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 848 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=1015, Invalid=3407, Unknown=0, NotChecked=0, Total=4422 [2023-04-03 02:41:21,502 INFO L413 NwaCegarLoop]: 252 mSDtfsCounter, 777 mSDsluCounter, 2536 mSDsCounter, 0 mSdLazyCounter, 1782 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 777 SdHoareTripleChecker+Valid, 2788 SdHoareTripleChecker+Invalid, 1810 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1782 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-04-03 02:41:21,502 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [777 Valid, 2788 Invalid, 1810 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1782 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-04-03 02:41:21,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3330 states. [2023-04-03 02:41:22,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3330 to 3162. [2023-04-03 02:41:22,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3162 states, 3158 states have (on average 1.416402786573781) internal successors, (4473), 3158 states have internal predecessors, (4473), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:41:22,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3162 states to 3162 states and 4476 transitions. [2023-04-03 02:41:22,160 INFO L78 Accepts]: Start accepts. Automaton has 3162 states and 4476 transitions. Word has length 66 [2023-04-03 02:41:22,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:41:22,160 INFO L495 AbstractCegarLoop]: Abstraction has 3162 states and 4476 transitions. [2023-04-03 02:41:22,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.8) internal successors, (63), 35 states have internal predecessors, (63), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:41:22,160 INFO L276 IsEmpty]: Start isEmpty. Operand 3162 states and 4476 transitions. [2023-04-03 02:41:22,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-04-03 02:41:22,166 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:41:22,166 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-03 02:41:22,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-04-03 02:41:22,166 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:41:22,167 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:41:22,167 INFO L85 PathProgramCache]: Analyzing trace with hash 1203957995, now seen corresponding path program 1 times [2023-04-03 02:41:22,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:41:22,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206923361] [2023-04-03 02:41:22,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:41:22,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:41:22,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:41:22,244 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:41:22,244 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:41:22,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206923361] [2023-04-03 02:41:22,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206923361] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:41:22,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:41:22,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:41:22,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133063754] [2023-04-03 02:41:22,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:41:22,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:41:22,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:41:22,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:41:22,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:41:22,247 INFO L87 Difference]: Start difference. First operand 3162 states and 4476 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:41:23,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:41:23,088 INFO L93 Difference]: Finished difference Result 5505 states and 7885 transitions. [2023-04-03 02:41:23,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:41:23,088 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2023-04-03 02:41:23,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:41:23,093 INFO L225 Difference]: With dead ends: 5505 [2023-04-03 02:41:23,093 INFO L226 Difference]: Without dead ends: 4359 [2023-04-03 02:41:23,101 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:41:23,101 INFO L413 NwaCegarLoop]: 196 mSDtfsCounter, 74 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:41:23,102 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 325 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:41:23,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4359 states. [2023-04-03 02:41:23,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4359 to 4134. [2023-04-03 02:41:23,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4134 states, 4130 states have (on average 1.4142857142857144) internal successors, (5841), 4130 states have internal predecessors, (5841), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:41:23,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4134 states to 4134 states and 5844 transitions. [2023-04-03 02:41:23,930 INFO L78 Accepts]: Start accepts. Automaton has 4134 states and 5844 transitions. Word has length 70 [2023-04-03 02:41:23,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:41:23,930 INFO L495 AbstractCegarLoop]: Abstraction has 4134 states and 5844 transitions. [2023-04-03 02:41:23,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:41:23,930 INFO L276 IsEmpty]: Start isEmpty. Operand 4134 states and 5844 transitions. [2023-04-03 02:41:23,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-04-03 02:41:23,931 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:41:23,931 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:41:23,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-04-03 02:41:23,931 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:41:23,931 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:41:23,931 INFO L85 PathProgramCache]: Analyzing trace with hash 1837922798, now seen corresponding path program 1 times [2023-04-03 02:41:23,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:41:23,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245143919] [2023-04-03 02:41:23,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:41:23,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:41:23,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:41:23,987 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:41:23,987 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:41:23,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245143919] [2023-04-03 02:41:23,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245143919] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:41:23,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:41:23,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:41:23,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214493863] [2023-04-03 02:41:23,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:41:23,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:41:23,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:41:23,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:41:23,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:41:23,989 INFO L87 Difference]: Start difference. First operand 4134 states and 5844 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:41:25,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:41:25,024 INFO L93 Difference]: Finished difference Result 7460 states and 10648 transitions. [2023-04-03 02:41:25,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:41:25,025 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2023-04-03 02:41:25,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:41:25,032 INFO L225 Difference]: With dead ends: 7460 [2023-04-03 02:41:25,032 INFO L226 Difference]: Without dead ends: 5362 [2023-04-03 02:41:25,035 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:41:25,036 INFO L413 NwaCegarLoop]: 177 mSDtfsCounter, 70 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:41:25,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 306 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:41:25,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5362 states. [2023-04-03 02:41:26,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5362 to 4993. [2023-04-03 02:41:26,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4993 states, 4989 states have (on average 1.4109039887753057) internal successors, (7039), 4989 states have internal predecessors, (7039), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:41:26,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4993 states to 4993 states and 7042 transitions. [2023-04-03 02:41:26,015 INFO L78 Accepts]: Start accepts. Automaton has 4993 states and 7042 transitions. Word has length 72 [2023-04-03 02:41:26,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:41:26,015 INFO L495 AbstractCegarLoop]: Abstraction has 4993 states and 7042 transitions. [2023-04-03 02:41:26,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:41:26,015 INFO L276 IsEmpty]: Start isEmpty. Operand 4993 states and 7042 transitions. [2023-04-03 02:41:26,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-04-03 02:41:26,016 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:41:26,016 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-03 02:41:26,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-04-03 02:41:26,016 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:41:26,016 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:41:26,017 INFO L85 PathProgramCache]: Analyzing trace with hash 1569532435, now seen corresponding path program 1 times [2023-04-03 02:41:26,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:41:26,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128692710] [2023-04-03 02:41:26,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:41:26,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:41:26,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:41:26,050 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:41:26,050 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:41:26,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128692710] [2023-04-03 02:41:26,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128692710] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:41:26,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:41:26,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:41:26,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387935309] [2023-04-03 02:41:26,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:41:26,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:41:26,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:41:26,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:41:26,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:41:26,051 INFO L87 Difference]: Start difference. First operand 4993 states and 7042 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 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) [2023-04-03 02:41:27,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:41:27,460 INFO L93 Difference]: Finished difference Result 9553 states and 13461 transitions. [2023-04-03 02:41:27,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:41:27,460 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 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 [2023-04-03 02:41:27,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:41:27,468 INFO L225 Difference]: With dead ends: 9553 [2023-04-03 02:41:27,468 INFO L226 Difference]: Without dead ends: 6743 [2023-04-03 02:41:27,472 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:41:27,472 INFO L413 NwaCegarLoop]: 192 mSDtfsCounter, 68 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:41:27,472 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 314 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:41:27,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6743 states. [2023-04-03 02:41:28,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6743 to 6741. [2023-04-03 02:41:28,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6741 states, 6737 states have (on average 1.3964672702983525) internal successors, (9408), 6737 states have internal predecessors, (9408), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:41:28,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6741 states to 6741 states and 9411 transitions. [2023-04-03 02:41:28,863 INFO L78 Accepts]: Start accepts. Automaton has 6741 states and 9411 transitions. Word has length 75 [2023-04-03 02:41:28,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:41:28,863 INFO L495 AbstractCegarLoop]: Abstraction has 6741 states and 9411 transitions. [2023-04-03 02:41:28,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 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) [2023-04-03 02:41:28,863 INFO L276 IsEmpty]: Start isEmpty. Operand 6741 states and 9411 transitions. [2023-04-03 02:41:28,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-04-03 02:41:28,864 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:41:28,864 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-03 02:41:28,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-04-03 02:41:28,864 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:41:28,864 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:41:28,864 INFO L85 PathProgramCache]: Analyzing trace with hash -958345613, now seen corresponding path program 1 times [2023-04-03 02:41:28,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:41:28,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257238247] [2023-04-03 02:41:28,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:41:28,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:41:28,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:41:28,928 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:41:28,928 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:41:28,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257238247] [2023-04-03 02:41:28,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257238247] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:41:28,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:41:28,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:41:28,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411720434] [2023-04-03 02:41:28,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:41:28,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:41:28,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:41:28,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:41:28,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:41:28,930 INFO L87 Difference]: Start difference. First operand 6741 states and 9411 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 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) [2023-04-03 02:41:30,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:41:30,895 INFO L93 Difference]: Finished difference Result 13731 states and 19322 transitions. [2023-04-03 02:41:30,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:41:30,896 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 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 [2023-04-03 02:41:30,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:41:30,906 INFO L225 Difference]: With dead ends: 13731 [2023-04-03 02:41:30,906 INFO L226 Difference]: Without dead ends: 9305 [2023-04-03 02:41:30,911 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:41:30,911 INFO L413 NwaCegarLoop]: 158 mSDtfsCounter, 65 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:41:30,911 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 287 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:41:30,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9305 states. [2023-04-03 02:41:32,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9305 to 8539. [2023-04-03 02:41:32,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8539 states, 8535 states have (on average 1.3876977152899825) internal successors, (11844), 8535 states have internal predecessors, (11844), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:41:32,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8539 states to 8539 states and 11847 transitions. [2023-04-03 02:41:32,753 INFO L78 Accepts]: Start accepts. Automaton has 8539 states and 11847 transitions. Word has length 75 [2023-04-03 02:41:32,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:41:32,754 INFO L495 AbstractCegarLoop]: Abstraction has 8539 states and 11847 transitions. [2023-04-03 02:41:32,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 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) [2023-04-03 02:41:32,754 INFO L276 IsEmpty]: Start isEmpty. Operand 8539 states and 11847 transitions. [2023-04-03 02:41:32,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-04-03 02:41:32,755 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:41:32,755 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-03 02:41:32,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-04-03 02:41:32,755 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:41:32,755 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:41:32,756 INFO L85 PathProgramCache]: Analyzing trace with hash -823563394, now seen corresponding path program 1 times [2023-04-03 02:41:32,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:41:32,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782296808] [2023-04-03 02:41:32,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:41:32,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:41:32,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:41:32,813 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:41:32,813 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:41:32,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782296808] [2023-04-03 02:41:32,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782296808] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:41:32,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:41:32,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:41:32,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883113113] [2023-04-03 02:41:32,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:41:32,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:41:32,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:41:32,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:41:32,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:41:32,814 INFO L87 Difference]: Start difference. First operand 8539 states and 11847 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:41:35,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:41:35,437 INFO L93 Difference]: Finished difference Result 20246 states and 28232 transitions. [2023-04-03 02:41:35,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:41:35,437 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2023-04-03 02:41:35,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:41:35,456 INFO L225 Difference]: With dead ends: 20246 [2023-04-03 02:41:35,456 INFO L226 Difference]: Without dead ends: 12594 [2023-04-03 02:41:35,467 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:41:35,467 INFO L413 NwaCegarLoop]: 137 mSDtfsCounter, 60 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:41:35,468 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 266 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:41:35,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12594 states. [2023-04-03 02:41:37,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12594 to 11546. [2023-04-03 02:41:37,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11546 states, 11542 states have (on average 1.3772309824987004) internal successors, (15896), 11542 states have internal predecessors, (15896), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:41:37,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11546 states to 11546 states and 15899 transitions. [2023-04-03 02:41:37,986 INFO L78 Accepts]: Start accepts. Automaton has 11546 states and 15899 transitions. Word has length 78 [2023-04-03 02:41:37,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:41:37,987 INFO L495 AbstractCegarLoop]: Abstraction has 11546 states and 15899 transitions. [2023-04-03 02:41:37,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:41:37,987 INFO L276 IsEmpty]: Start isEmpty. Operand 11546 states and 15899 transitions. [2023-04-03 02:41:37,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-04-03 02:41:37,990 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:41:37,990 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-04-03 02:41:37,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-04-03 02:41:37,990 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:41:37,990 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:41:37,990 INFO L85 PathProgramCache]: Analyzing trace with hash 517456105, now seen corresponding path program 1 times [2023-04-03 02:41:37,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:41:37,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534909460] [2023-04-03 02:41:37,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:41:37,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:41:38,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:41:39,002 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:41:39,003 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:41:39,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534909460] [2023-04-03 02:41:39,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534909460] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 02:41:39,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685648179] [2023-04-03 02:41:39,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:41:39,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 02:41:39,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 02:41:39,010 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 02:41:39,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-03 02:41:39,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:41:39,199 INFO L262 TraceCheckSpWp]: Trace formula consists of 829 conjuncts, 101 conjunts are in the unsatisfiable core [2023-04-03 02:41:39,207 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 02:41:41,269 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:41:41,269 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-03 02:41:51,232 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:41:51,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685648179] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-03 02:41:51,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [381304608] [2023-04-03 02:41:51,276 INFO L159 IcfgInterpreter]: Started Sifa with 82 locations of interest [2023-04-03 02:41:51,276 INFO L166 IcfgInterpreter]: Building call graph [2023-04-03 02:41:51,280 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-03 02:41:51,286 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-03 02:41:51,286 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-03 02:41:51,767 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 158 for LOIs [2023-04-03 02:41:56,539 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 11 [2023-04-03 02:44:33,345 WARN L223 SmtUtils]: Spent 2.26m on a formula simplification. DAG size of input: 14558 DAG size of output: 391 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm)