/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/pals_opt-floodmax.5.4.ufo.UNBOUNDED.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-03 02:06:17,011 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-03 02:06:17,012 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-03 02:06:17,029 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-03 02:06:17,030 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-03 02:06:17,030 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-03 02:06:17,031 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-03 02:06:17,032 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-03 02:06:17,033 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-03 02:06:17,034 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-03 02:06:17,034 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-03 02:06:17,035 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-03 02:06:17,035 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-03 02:06:17,036 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-03 02:06:17,036 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-03 02:06:17,037 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-03 02:06:17,037 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-03 02:06:17,038 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-03 02:06:17,039 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-03 02:06:17,040 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-03 02:06:17,041 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-03 02:06:17,042 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-03 02:06:17,043 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-03 02:06:17,043 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-03 02:06:17,046 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-03 02:06:17,046 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-03 02:06:17,047 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-03 02:06:17,047 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-03 02:06:17,047 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-03 02:06:17,048 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-03 02:06:17,048 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-03 02:06:17,049 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-03 02:06:17,049 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-03 02:06:17,050 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-03 02:06:17,050 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-03 02:06:17,051 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-03 02:06:17,051 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-03 02:06:17,051 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-03 02:06:17,051 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-03 02:06:17,052 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-03 02:06:17,052 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-03 02:06:17,053 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 02:06:17,067 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-03 02:06:17,067 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-03 02:06:17,067 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-03 02:06:17,067 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-03 02:06:17,068 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-03 02:06:17,068 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-03 02:06:17,068 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-03 02:06:17,068 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-03 02:06:17,068 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-03 02:06:17,068 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-03 02:06:17,068 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-03 02:06:17,068 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-03 02:06:17,068 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-03 02:06:17,068 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-03 02:06:17,069 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-03 02:06:17,069 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-03 02:06:17,069 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-03 02:06:17,069 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-03 02:06:17,069 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-03 02:06:17,069 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-03 02:06:17,069 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-03 02:06:17,069 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-03 02:06:17,070 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-03 02:06:17,070 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-03 02:06:17,070 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-03 02:06:17,070 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-03 02:06:17,070 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-03 02:06:17,070 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-03 02:06:17,070 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-03 02:06:17,070 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-03 02:06:17,070 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-03 02:06:17,070 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-03 02:06:17,071 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 02:06:17,071 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-03 02:06:17,071 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-03 02:06:17,071 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-03 02:06:17,071 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-03 02:06:17,071 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-03 02:06:17,071 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-03 02:06:17,071 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-03 02:06:17,071 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-03 02:06:17,071 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-03 02:06:17,244 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-03 02:06:17,258 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-03 02:06:17,260 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-03 02:06:17,260 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-03 02:06:17,273 INFO L275 PluginConnector]: CDTParser initialized [2023-04-03 02:06:17,275 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.5.4.ufo.UNBOUNDED.pals.c [2023-04-03 02:06:18,200 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-03 02:06:18,454 INFO L351 CDTParser]: Found 1 translation units. [2023-04-03 02:06:18,454 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.5.4.ufo.UNBOUNDED.pals.c [2023-04-03 02:06:18,478 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e718166bd/2a0a278bae4f4ee9a08231f2c974e1bf/FLAG217d34554 [2023-04-03 02:06:18,493 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e718166bd/2a0a278bae4f4ee9a08231f2c974e1bf [2023-04-03 02:06:18,495 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-03 02:06:18,498 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-03 02:06:18,501 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-03 02:06:18,502 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-03 02:06:18,504 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-03 02:06:18,505 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 02:06:18" (1/1) ... [2023-04-03 02:06:18,506 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@608f891d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:06:18, skipping insertion in model container [2023-04-03 02:06:18,506 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 02:06:18" (1/1) ... [2023-04-03 02:06:18,512 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-03 02:06:18,570 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-03 02:06:18,828 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/pals_opt-floodmax.5.4.ufo.UNBOUNDED.pals.c[65679,65692] [2023-04-03 02:06:18,831 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 02:06:18,840 INFO L203 MainTranslator]: Completed pre-run [2023-04-03 02:06:18,925 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/pals_opt-floodmax.5.4.ufo.UNBOUNDED.pals.c[65679,65692] [2023-04-03 02:06:18,925 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 02:06:18,936 INFO L208 MainTranslator]: Completed translation [2023-04-03 02:06:18,936 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:06:18 WrapperNode [2023-04-03 02:06:18,948 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-03 02:06:18,949 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-03 02:06:18,949 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-03 02:06:18,949 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-03 02:06:18,957 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:06:18" (1/1) ... [2023-04-03 02:06:18,958 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:06:18" (1/1) ... [2023-04-03 02:06:18,983 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:06:18" (1/1) ... [2023-04-03 02:06:18,983 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:06:18" (1/1) ... [2023-04-03 02:06:19,015 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:06:18" (1/1) ... [2023-04-03 02:06:19,035 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:06:18" (1/1) ... [2023-04-03 02:06:19,040 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:06:18" (1/1) ... [2023-04-03 02:06:19,056 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:06:18" (1/1) ... [2023-04-03 02:06:19,070 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-03 02:06:19,071 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-03 02:06:19,071 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-03 02:06:19,071 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-03 02:06:19,072 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:06:18" (1/1) ... [2023-04-03 02:06:19,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 02:06:19,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 02:06:19,096 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 02:06:19,102 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 02:06:19,126 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-03 02:06:19,126 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-03 02:06:19,126 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-03 02:06:19,126 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-03 02:06:19,126 INFO L138 BoogieDeclarations]: Found implementation of procedure node1 [2023-04-03 02:06:19,126 INFO L138 BoogieDeclarations]: Found implementation of procedure node2 [2023-04-03 02:06:19,126 INFO L138 BoogieDeclarations]: Found implementation of procedure node3 [2023-04-03 02:06:19,127 INFO L138 BoogieDeclarations]: Found implementation of procedure node4 [2023-04-03 02:06:19,127 INFO L138 BoogieDeclarations]: Found implementation of procedure node5 [2023-04-03 02:06:19,127 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2023-04-03 02:06:19,127 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2023-04-03 02:06:19,127 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-03 02:06:19,127 INFO L138 BoogieDeclarations]: Found implementation of procedure assert [2023-04-03 02:06:19,127 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-03 02:06:19,128 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-03 02:06:19,128 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-03 02:06:19,128 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-03 02:06:19,128 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-03 02:06:19,128 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2023-04-03 02:06:19,128 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-03 02:06:19,128 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-03 02:06:19,128 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-03 02:06:19,128 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-03 02:06:19,128 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-03 02:06:19,128 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-03 02:06:19,128 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-03 02:06:19,128 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-03 02:06:19,129 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2023-04-03 02:06:19,129 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2023-04-03 02:06:19,129 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-03 02:06:19,129 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-03 02:06:19,129 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-03 02:06:19,129 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-03 02:06:19,129 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-03 02:06:19,129 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-03 02:06:19,129 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-03 02:06:19,129 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-03 02:06:19,129 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-03 02:06:19,295 INFO L236 CfgBuilder]: Building ICFG [2023-04-03 02:06:19,297 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-03 02:06:20,647 INFO L277 CfgBuilder]: Performing block encoding [2023-04-03 02:06:21,722 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-03 02:06:21,722 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-03 02:06:21,724 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 02:06:21 BoogieIcfgContainer [2023-04-03 02:06:21,725 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-03 02:06:21,726 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-03 02:06:21,726 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-03 02:06:21,728 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-03 02:06:21,729 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.04 02:06:18" (1/3) ... [2023-04-03 02:06:21,729 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f14ccfc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 02:06:21, skipping insertion in model container [2023-04-03 02:06:21,729 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:06:18" (2/3) ... [2023-04-03 02:06:21,729 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f14ccfc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 02:06:21, skipping insertion in model container [2023-04-03 02:06:21,729 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 02:06:21" (3/3) ... [2023-04-03 02:06:21,731 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.4.ufo.UNBOUNDED.pals.c [2023-04-03 02:06:21,744 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-03 02:06:21,745 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-03 02:06:21,800 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-03 02:06:21,805 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;@5269364c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-03 02:06:21,805 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-03 02:06:21,810 INFO L276 IsEmpty]: Start isEmpty. Operand has 478 states, 454 states have (on average 1.6938325991189427) internal successors, (769), 456 states have internal predecessors, (769), 11 states have call successors, (11), 11 states have call predecessors, (11), 11 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-04-03 02:06:21,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2023-04-03 02:06:21,824 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:06:21,825 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:06:21,825 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:06:21,829 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:06:21,829 INFO L85 PathProgramCache]: Analyzing trace with hash 410778463, now seen corresponding path program 1 times [2023-04-03 02:06:21,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:06:21,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898912583] [2023-04-03 02:06:21,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:06:21,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:06:23,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:06:31,647 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 02:06:31,648 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:06:31,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898912583] [2023-04-03 02:06:31,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898912583] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:06:31,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:06:31,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2023-04-03 02:06:31,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511178238] [2023-04-03 02:06:31,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:06:31,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-04-03 02:06:31,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:06:31,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-04-03 02:06:31,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2023-04-03 02:06:31,679 INFO L87 Difference]: Start difference. First operand has 478 states, 454 states have (on average 1.6938325991189427) internal successors, (769), 456 states have internal predecessors, (769), 11 states have call successors, (11), 11 states have call predecessors, (11), 11 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 23 states, 11 states have (on average 12.727272727272727) internal successors, (140), 13 states have internal predecessors, (140), 9 states have call successors, (11), 7 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2023-04-03 02:06:36,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:06:36,228 INFO L93 Difference]: Finished difference Result 578 states and 929 transitions. [2023-04-03 02:06:36,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-04-03 02:06:36,231 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 11 states have (on average 12.727272727272727) internal successors, (140), 13 states have internal predecessors, (140), 9 states have call successors, (11), 7 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) Word has length 160 [2023-04-03 02:06:36,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:06:36,247 INFO L225 Difference]: With dead ends: 578 [2023-04-03 02:06:36,247 INFO L226 Difference]: Without dead ends: 533 [2023-04-03 02:06:36,250 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=438, Invalid=1368, Unknown=0, NotChecked=0, Total=1806 [2023-04-03 02:06:36,252 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 6458 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 7173 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6461 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 7363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 7173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2023-04-03 02:06:36,253 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6461 Valid, 142 Invalid, 7363 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [190 Valid, 7173 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2023-04-03 02:06:36,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2023-04-03 02:06:36,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 509. [2023-04-03 02:06:36,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 475 states have (on average 1.6821052631578948) internal successors, (799), 476 states have internal predecessors, (799), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (17), 15 states have call predecessors, (17), 16 states have call successors, (17) [2023-04-03 02:06:36,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 833 transitions. [2023-04-03 02:06:36,354 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 833 transitions. Word has length 160 [2023-04-03 02:06:36,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:06:36,357 INFO L495 AbstractCegarLoop]: Abstraction has 509 states and 833 transitions. [2023-04-03 02:06:36,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 11 states have (on average 12.727272727272727) internal successors, (140), 13 states have internal predecessors, (140), 9 states have call successors, (11), 7 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2023-04-03 02:06:36,358 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 833 transitions. [2023-04-03 02:06:36,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2023-04-03 02:06:36,368 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:06:36,368 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:06:36,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-03 02:06:36,368 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:06:36,369 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:06:36,369 INFO L85 PathProgramCache]: Analyzing trace with hash -123377045, now seen corresponding path program 1 times [2023-04-03 02:06:36,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:06:36,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988756142] [2023-04-03 02:06:36,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:06:36,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:06:36,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:06:40,242 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 02:06:40,242 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:06:40,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988756142] [2023-04-03 02:06:40,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988756142] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:06:40,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:06:40,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-03 02:06:40,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675563054] [2023-04-03 02:06:40,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:06:40,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-03 02:06:40,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:06:40,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-03 02:06:40,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-04-03 02:06:40,249 INFO L87 Difference]: Start difference. First operand 509 states and 833 transitions. Second operand has 11 states, 7 states have (on average 20.142857142857142) internal successors, (141), 9 states have internal predecessors, (141), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2023-04-03 02:06:42,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:06:42,606 INFO L93 Difference]: Finished difference Result 589 states and 935 transitions. [2023-04-03 02:06:42,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-03 02:06:42,606 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 20.142857142857142) internal successors, (141), 9 states have internal predecessors, (141), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) Word has length 161 [2023-04-03 02:06:42,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:06:42,609 INFO L225 Difference]: With dead ends: 589 [2023-04-03 02:06:42,610 INFO L226 Difference]: Without dead ends: 540 [2023-04-03 02:06:42,610 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2023-04-03 02:06:42,611 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 847 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 5520 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 850 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 5558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 5520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-04-03 02:06:42,611 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [850 Valid, 96 Invalid, 5558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 5520 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-04-03 02:06:42,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2023-04-03 02:06:42,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 509. [2023-04-03 02:06:42,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 475 states have (on average 1.68) internal successors, (798), 476 states have internal predecessors, (798), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2023-04-03 02:06:42,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 831 transitions. [2023-04-03 02:06:42,686 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 831 transitions. Word has length 161 [2023-04-03 02:06:42,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:06:42,686 INFO L495 AbstractCegarLoop]: Abstraction has 509 states and 831 transitions. [2023-04-03 02:06:42,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 20.142857142857142) internal successors, (141), 9 states have internal predecessors, (141), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2023-04-03 02:06:42,686 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 831 transitions. [2023-04-03 02:06:42,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2023-04-03 02:06:42,688 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:06:42,688 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:06:42,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-03 02:06:42,688 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:06:42,689 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:06:42,689 INFO L85 PathProgramCache]: Analyzing trace with hash 1604382792, now seen corresponding path program 1 times [2023-04-03 02:06:42,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:06:42,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607384475] [2023-04-03 02:06:42,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:06:42,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:06:42,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:06:46,467 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 02:06:46,468 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:06:46,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607384475] [2023-04-03 02:06:46,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607384475] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:06:46,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:06:46,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-03 02:06:46,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150111878] [2023-04-03 02:06:46,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:06:46,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-03 02:06:46,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:06:46,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-03 02:06:46,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-04-03 02:06:46,471 INFO L87 Difference]: Start difference. First operand 509 states and 831 transitions. Second operand has 11 states, 7 states have (on average 20.285714285714285) internal successors, (142), 9 states have internal predecessors, (142), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2023-04-03 02:06:48,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:06:48,941 INFO L93 Difference]: Finished difference Result 583 states and 919 transitions. [2023-04-03 02:06:48,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-03 02:06:48,941 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 20.285714285714285) internal successors, (142), 9 states have internal predecessors, (142), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) Word has length 162 [2023-04-03 02:06:48,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:06:48,944 INFO L225 Difference]: With dead ends: 583 [2023-04-03 02:06:48,944 INFO L226 Difference]: Without dead ends: 539 [2023-04-03 02:06:48,944 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2023-04-03 02:06:48,945 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 1642 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 6313 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1647 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 6355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 6313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-04-03 02:06:48,945 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1647 Valid, 99 Invalid, 6355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 6313 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-04-03 02:06:48,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2023-04-03 02:06:48,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 509. [2023-04-03 02:06:48,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 475 states have (on average 1.6778947368421053) internal successors, (797), 476 states have internal predecessors, (797), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2023-04-03 02:06:48,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 830 transitions. [2023-04-03 02:06:48,982 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 830 transitions. Word has length 162 [2023-04-03 02:06:48,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:06:48,982 INFO L495 AbstractCegarLoop]: Abstraction has 509 states and 830 transitions. [2023-04-03 02:06:48,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 20.285714285714285) internal successors, (142), 9 states have internal predecessors, (142), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2023-04-03 02:06:48,983 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 830 transitions. [2023-04-03 02:06:48,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2023-04-03 02:06:48,984 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:06:48,984 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:06:48,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-03 02:06:48,984 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:06:48,985 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:06:48,985 INFO L85 PathProgramCache]: Analyzing trace with hash 437074292, now seen corresponding path program 1 times [2023-04-03 02:06:48,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:06:48,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124044661] [2023-04-03 02:06:48,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:06:48,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:06:49,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:06:52,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:06:52,436 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:06:52,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124044661] [2023-04-03 02:06:52,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124044661] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:06:52,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:06:52,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-03 02:06:52,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384817016] [2023-04-03 02:06:52,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:06:52,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-03 02:06:52,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:06:52,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-03 02:06:52,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-04-03 02:06:52,438 INFO L87 Difference]: Start difference. First operand 509 states and 830 transitions. Second operand has 11 states, 7 states have (on average 20.428571428571427) internal successors, (143), 9 states have internal predecessors, (143), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2023-04-03 02:06:54,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:06:54,632 INFO L93 Difference]: Finished difference Result 589 states and 924 transitions. [2023-04-03 02:06:54,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-03 02:06:54,639 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 20.428571428571427) internal successors, (143), 9 states have internal predecessors, (143), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) Word has length 163 [2023-04-03 02:06:54,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:06:54,641 INFO L225 Difference]: With dead ends: 589 [2023-04-03 02:06:54,641 INFO L226 Difference]: Without dead ends: 545 [2023-04-03 02:06:54,642 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2023-04-03 02:06:54,643 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 857 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 5556 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 864 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 5592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 5556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:06:54,643 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [864 Valid, 100 Invalid, 5592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 5556 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-04-03 02:06:54,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2023-04-03 02:06:54,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 509. [2023-04-03 02:06:54,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 475 states have (on average 1.6757894736842105) internal successors, (796), 476 states have internal predecessors, (796), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2023-04-03 02:06:54,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 829 transitions. [2023-04-03 02:06:54,680 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 829 transitions. Word has length 163 [2023-04-03 02:06:54,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:06:54,680 INFO L495 AbstractCegarLoop]: Abstraction has 509 states and 829 transitions. [2023-04-03 02:06:54,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 20.428571428571427) internal successors, (143), 9 states have internal predecessors, (143), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2023-04-03 02:06:54,680 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 829 transitions. [2023-04-03 02:06:54,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2023-04-03 02:06:54,681 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:06:54,682 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:06:54,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-03 02:06:54,682 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:06:54,682 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:06:54,682 INFO L85 PathProgramCache]: Analyzing trace with hash -283039439, now seen corresponding path program 1 times [2023-04-03 02:06:54,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:06:54,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113895675] [2023-04-03 02:06:54,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:06:54,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:06:54,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:06:58,132 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 02:06:58,132 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:06:58,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113895675] [2023-04-03 02:06:58,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113895675] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:06:58,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:06:58,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-03 02:06:58,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668247956] [2023-04-03 02:06:58,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:06:58,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-03 02:06:58,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:06:58,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-03 02:06:58,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-04-03 02:06:58,134 INFO L87 Difference]: Start difference. First operand 509 states and 829 transitions. Second operand has 11 states, 7 states have (on average 20.571428571428573) internal successors, (144), 9 states have internal predecessors, (144), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2023-04-03 02:07:00,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:07:00,321 INFO L93 Difference]: Finished difference Result 595 states and 929 transitions. [2023-04-03 02:07:00,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-03 02:07:00,323 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 20.571428571428573) internal successors, (144), 9 states have internal predecessors, (144), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) Word has length 164 [2023-04-03 02:07:00,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:07:00,325 INFO L225 Difference]: With dead ends: 595 [2023-04-03 02:07:00,325 INFO L226 Difference]: Without dead ends: 551 [2023-04-03 02:07:00,325 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2023-04-03 02:07:00,326 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 865 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 5574 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 874 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 5620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 5574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:07:00,326 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [874 Valid, 102 Invalid, 5620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 5574 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-04-03 02:07:00,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2023-04-03 02:07:00,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 509. [2023-04-03 02:07:00,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 475 states have (on average 1.6736842105263159) internal successors, (795), 476 states have internal predecessors, (795), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2023-04-03 02:07:00,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 828 transitions. [2023-04-03 02:07:00,364 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 828 transitions. Word has length 164 [2023-04-03 02:07:00,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:07:00,364 INFO L495 AbstractCegarLoop]: Abstraction has 509 states and 828 transitions. [2023-04-03 02:07:00,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 20.571428571428573) internal successors, (144), 9 states have internal predecessors, (144), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2023-04-03 02:07:00,365 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 828 transitions. [2023-04-03 02:07:00,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2023-04-03 02:07:00,366 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:07:00,366 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:07:00,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-03 02:07:00,366 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:07:00,366 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:07:00,366 INFO L85 PathProgramCache]: Analyzing trace with hash -25017219, now seen corresponding path program 1 times [2023-04-03 02:07:00,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:07:00,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692834578] [2023-04-03 02:07:00,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:07:00,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:07:00,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:07:03,807 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 02:07:03,807 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:07:03,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692834578] [2023-04-03 02:07:03,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692834578] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:07:03,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:07:03,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-03 02:07:03,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543253265] [2023-04-03 02:07:03,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:07:03,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-03 02:07:03,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:07:03,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-03 02:07:03,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-04-03 02:07:03,809 INFO L87 Difference]: Start difference. First operand 509 states and 828 transitions. Second operand has 11 states, 7 states have (on average 20.714285714285715) internal successors, (145), 9 states have internal predecessors, (145), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2023-04-03 02:07:06,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:07:06,304 INFO L93 Difference]: Finished difference Result 601 states and 934 transitions. [2023-04-03 02:07:06,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-03 02:07:06,305 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 20.714285714285715) internal successors, (145), 9 states have internal predecessors, (145), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) Word has length 165 [2023-04-03 02:07:06,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:07:06,307 INFO L225 Difference]: With dead ends: 601 [2023-04-03 02:07:06,307 INFO L226 Difference]: Without dead ends: 557 [2023-04-03 02:07:06,308 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2023-04-03 02:07:06,308 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 859 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 6393 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 870 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 6419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 6393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-04-03 02:07:06,309 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [870 Valid, 111 Invalid, 6419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 6393 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-04-03 02:07:06,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2023-04-03 02:07:06,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 509. [2023-04-03 02:07:06,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 475 states have (on average 1.671578947368421) internal successors, (794), 476 states have internal predecessors, (794), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2023-04-03 02:07:06,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 827 transitions. [2023-04-03 02:07:06,355 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 827 transitions. Word has length 165 [2023-04-03 02:07:06,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:07:06,355 INFO L495 AbstractCegarLoop]: Abstraction has 509 states and 827 transitions. [2023-04-03 02:07:06,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 20.714285714285715) internal successors, (145), 9 states have internal predecessors, (145), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2023-04-03 02:07:06,355 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 827 transitions. [2023-04-03 02:07:06,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2023-04-03 02:07:06,357 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:07:06,357 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:07:06,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-03 02:07:06,357 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:07:06,357 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:07:06,357 INFO L85 PathProgramCache]: Analyzing trace with hash 2010247205, now seen corresponding path program 1 times [2023-04-03 02:07:06,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:07:06,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453583940] [2023-04-03 02:07:06,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:07:06,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:07:07,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:07:12,700 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 02:07:12,700 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:07:12,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453583940] [2023-04-03 02:07:12,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453583940] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:07:12,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:07:12,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2023-04-03 02:07:12,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567887334] [2023-04-03 02:07:12,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:07:12,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-04-03 02:07:12,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:07:12,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-04-03 02:07:12,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2023-04-03 02:07:12,702 INFO L87 Difference]: Start difference. First operand 509 states and 827 transitions. Second operand has 24 states, 12 states have (on average 12.25) internal successors, (147), 14 states have internal predecessors, (147), 9 states have call successors, (11), 7 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2023-04-03 02:07:17,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:07:17,698 INFO L93 Difference]: Finished difference Result 607 states and 948 transitions. [2023-04-03 02:07:17,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-04-03 02:07:17,699 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 12 states have (on average 12.25) internal successors, (147), 14 states have internal predecessors, (147), 9 states have call successors, (11), 7 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) Word has length 167 [2023-04-03 02:07:17,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:07:17,701 INFO L225 Difference]: With dead ends: 607 [2023-04-03 02:07:17,701 INFO L226 Difference]: Without dead ends: 559 [2023-04-03 02:07:17,702 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=569, Invalid=1881, Unknown=0, NotChecked=0, Total=2450 [2023-04-03 02:07:17,702 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 5533 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 8883 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5536 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 9062 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 8883 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2023-04-03 02:07:17,703 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5536 Valid, 203 Invalid, 9062 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 8883 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2023-04-03 02:07:17,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2023-04-03 02:07:17,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 513. [2023-04-03 02:07:17,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 513 states, 479 states have (on average 1.663883089770355) internal successors, (797), 480 states have internal predecessors, (797), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2023-04-03 02:07:17,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 830 transitions. [2023-04-03 02:07:17,754 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 830 transitions. Word has length 167 [2023-04-03 02:07:17,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:07:17,754 INFO L495 AbstractCegarLoop]: Abstraction has 513 states and 830 transitions. [2023-04-03 02:07:17,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 12 states have (on average 12.25) internal successors, (147), 14 states have internal predecessors, (147), 9 states have call successors, (11), 7 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2023-04-03 02:07:17,754 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 830 transitions. [2023-04-03 02:07:17,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2023-04-03 02:07:17,756 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:07:17,756 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:07:17,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-03 02:07:17,756 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:07:17,756 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:07:17,756 INFO L85 PathProgramCache]: Analyzing trace with hash -2043255384, now seen corresponding path program 1 times [2023-04-03 02:07:17,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:07:17,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196107243] [2023-04-03 02:07:17,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:07:17,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:07:18,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:07:22,195 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 02:07:22,195 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:07:22,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196107243] [2023-04-03 02:07:22,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196107243] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:07:22,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:07:22,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-03 02:07:22,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205098439] [2023-04-03 02:07:22,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:07:22,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-03 02:07:22,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:07:22,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-03 02:07:22,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-04-03 02:07:22,197 INFO L87 Difference]: Start difference. First operand 513 states and 830 transitions. Second operand has 11 states, 7 states have (on average 21.142857142857142) internal successors, (148), 9 states have internal predecessors, (148), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2023-04-03 02:07:24,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:07:24,609 INFO L93 Difference]: Finished difference Result 610 states and 951 transitions. [2023-04-03 02:07:24,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-03 02:07:24,609 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 21.142857142857142) internal successors, (148), 9 states have internal predecessors, (148), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) Word has length 168 [2023-04-03 02:07:24,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:07:24,611 INFO L225 Difference]: With dead ends: 610 [2023-04-03 02:07:24,611 INFO L226 Difference]: Without dead ends: 558 [2023-04-03 02:07:24,612 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2023-04-03 02:07:24,612 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 854 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 5682 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 861 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 5721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 5682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-04-03 02:07:24,612 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [861 Valid, 115 Invalid, 5721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 5682 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-04-03 02:07:24,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2023-04-03 02:07:24,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 545. [2023-04-03 02:07:24,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 545 states, 497 states have (on average 1.6418511066398391) internal successors, (816), 498 states have internal predecessors, (816), 24 states have call successors, (24), 24 states have call predecessors, (24), 23 states have return successors, (24), 22 states have call predecessors, (24), 23 states have call successors, (24) [2023-04-03 02:07:24,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545 states to 545 states and 864 transitions. [2023-04-03 02:07:24,662 INFO L78 Accepts]: Start accepts. Automaton has 545 states and 864 transitions. Word has length 168 [2023-04-03 02:07:24,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:07:24,663 INFO L495 AbstractCegarLoop]: Abstraction has 545 states and 864 transitions. [2023-04-03 02:07:24,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 21.142857142857142) internal successors, (148), 9 states have internal predecessors, (148), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2023-04-03 02:07:24,663 INFO L276 IsEmpty]: Start isEmpty. Operand 545 states and 864 transitions. [2023-04-03 02:07:24,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2023-04-03 02:07:24,664 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:07:24,664 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:07:24,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-03 02:07:24,664 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:07:24,664 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:07:24,665 INFO L85 PathProgramCache]: Analyzing trace with hash -1615052338, now seen corresponding path program 1 times [2023-04-03 02:07:24,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:07:24,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398594953] [2023-04-03 02:07:24,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:07:24,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:07:25,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:07:35,502 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 02:07:35,502 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:07:35,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398594953] [2023-04-03 02:07:35,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398594953] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:07:35,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:07:35,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2023-04-03 02:07:35,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034674045] [2023-04-03 02:07:35,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:07:35,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-04-03 02:07:35,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:07:35,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-04-03 02:07:35,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=842, Unknown=0, NotChecked=0, Total=930 [2023-04-03 02:07:35,504 INFO L87 Difference]: Start difference. First operand 545 states and 864 transitions. Second operand has 31 states, 19 states have (on average 7.894736842105263) internal successors, (150), 20 states have internal predecessors, (150), 10 states have call successors, (11), 8 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-04-03 02:07:49,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:07:49,784 INFO L93 Difference]: Finished difference Result 2452 states and 3918 transitions. [2023-04-03 02:07:49,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2023-04-03 02:07:49,784 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 19 states have (on average 7.894736842105263) internal successors, (150), 20 states have internal predecessors, (150), 10 states have call successors, (11), 8 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 170 [2023-04-03 02:07:49,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:07:49,790 INFO L225 Difference]: With dead ends: 2452 [2023-04-03 02:07:49,790 INFO L226 Difference]: Without dead ends: 1926 [2023-04-03 02:07:49,793 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2652 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=1560, Invalid=8142, Unknown=0, NotChecked=0, Total=9702 [2023-04-03 02:07:49,793 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 30494 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 12139 mSolverCounterSat, 432 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30508 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 12571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 432 IncrementalHoareTripleChecker+Valid, 12139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:07:49,793 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30508 Valid, 289 Invalid, 12571 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [432 Valid, 12139 Invalid, 0 Unknown, 0 Unchecked, 9.0s Time] [2023-04-03 02:07:49,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1926 states. [2023-04-03 02:07:50,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1926 to 1722. [2023-04-03 02:07:50,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1722 states, 1658 states have (on average 1.6501809408926418) internal successors, (2736), 1661 states have internal predecessors, (2736), 31 states have call successors, (31), 31 states have call predecessors, (31), 32 states have return successors, (33), 29 states have call predecessors, (33), 30 states have call successors, (33) [2023-04-03 02:07:50,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1722 states to 1722 states and 2800 transitions. [2023-04-03 02:07:50,011 INFO L78 Accepts]: Start accepts. Automaton has 1722 states and 2800 transitions. Word has length 170 [2023-04-03 02:07:50,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:07:50,011 INFO L495 AbstractCegarLoop]: Abstraction has 1722 states and 2800 transitions. [2023-04-03 02:07:50,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 19 states have (on average 7.894736842105263) internal successors, (150), 20 states have internal predecessors, (150), 10 states have call successors, (11), 8 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-04-03 02:07:50,011 INFO L276 IsEmpty]: Start isEmpty. Operand 1722 states and 2800 transitions. [2023-04-03 02:07:50,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2023-04-03 02:07:50,014 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:07:50,014 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:07:50,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-03 02:07:50,015 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:07:50,015 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:07:50,015 INFO L85 PathProgramCache]: Analyzing trace with hash 290251634, now seen corresponding path program 1 times [2023-04-03 02:07:50,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:07:50,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107936725] [2023-04-03 02:07:50,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:07:50,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:07:50,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:07:53,616 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 02:07:53,616 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:07:53,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107936725] [2023-04-03 02:07:53,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107936725] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:07:53,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:07:53,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-04-03 02:07:53,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373909870] [2023-04-03 02:07:53,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:07:53,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-03 02:07:53,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:07:53,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-03 02:07:53,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2023-04-03 02:07:53,618 INFO L87 Difference]: Start difference. First operand 1722 states and 2800 transitions. Second operand has 13 states, 8 states have (on average 18.875) internal successors, (151), 10 states have internal predecessors, (151), 3 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2023-04-03 02:07:54,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:07:54,384 INFO L93 Difference]: Finished difference Result 1759 states and 2847 transitions. [2023-04-03 02:07:54,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-04-03 02:07:54,385 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 8 states have (on average 18.875) internal successors, (151), 10 states have internal predecessors, (151), 3 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) Word has length 171 [2023-04-03 02:07:54,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:07:54,392 INFO L225 Difference]: With dead ends: 1759 [2023-04-03 02:07:54,392 INFO L226 Difference]: Without dead ends: 1757 [2023-04-03 02:07:54,393 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2023-04-03 02:07:54,393 INFO L413 NwaCegarLoop]: 727 mSDtfsCounter, 35 mSDsluCounter, 7912 mSDsCounter, 0 mSdLazyCounter, 988 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 8639 SdHoareTripleChecker+Invalid, 1006 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 988 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-03 02:07:54,394 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 8639 Invalid, 1006 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 988 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-03 02:07:54,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1757 states. [2023-04-03 02:07:54,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1757 to 1732. [2023-04-03 02:07:54,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1732 states, 1664 states have (on average 1.6478365384615385) internal successors, (2742), 1669 states have internal predecessors, (2742), 32 states have call successors, (32), 32 states have call predecessors, (32), 35 states have return successors, (36), 30 states have call predecessors, (36), 31 states have call successors, (36) [2023-04-03 02:07:54,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1732 states to 1732 states and 2810 transitions. [2023-04-03 02:07:54,622 INFO L78 Accepts]: Start accepts. Automaton has 1732 states and 2810 transitions. Word has length 171 [2023-04-03 02:07:54,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:07:54,622 INFO L495 AbstractCegarLoop]: Abstraction has 1732 states and 2810 transitions. [2023-04-03 02:07:54,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 8 states have (on average 18.875) internal successors, (151), 10 states have internal predecessors, (151), 3 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2023-04-03 02:07:54,623 INFO L276 IsEmpty]: Start isEmpty. Operand 1732 states and 2810 transitions. [2023-04-03 02:07:54,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2023-04-03 02:07:54,631 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:07:54,631 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:07:54,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-03 02:07:54,631 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:07:54,634 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:07:54,635 INFO L85 PathProgramCache]: Analyzing trace with hash -97822477, now seen corresponding path program 1 times [2023-04-03 02:07:54,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:07:54,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763010072] [2023-04-03 02:07:54,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:07:54,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:07:55,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:08:05,567 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 02:08:05,567 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:08:05,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763010072] [2023-04-03 02:08:05,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763010072] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:08:05,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:08:05,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2023-04-03 02:08:05,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271077239] [2023-04-03 02:08:05,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:08:05,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-04-03 02:08:05,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:08:05,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-04-03 02:08:05,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=840, Unknown=0, NotChecked=0, Total=930 [2023-04-03 02:08:05,576 INFO L87 Difference]: Start difference. First operand 1732 states and 2810 transitions. Second operand has 31 states, 19 states have (on average 8.0) internal successors, (152), 20 states have internal predecessors, (152), 10 states have call successors, (11), 8 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-04-03 02:08:21,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:08:21,738 INFO L93 Difference]: Finished difference Result 7849 states and 12816 transitions. [2023-04-03 02:08:21,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2023-04-03 02:08:21,739 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 19 states have (on average 8.0) internal successors, (152), 20 states have internal predecessors, (152), 10 states have call successors, (11), 8 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 172 [2023-04-03 02:08:21,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:08:21,758 INFO L225 Difference]: With dead ends: 7849 [2023-04-03 02:08:21,759 INFO L226 Difference]: Without dead ends: 6230 [2023-04-03 02:08:21,764 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3213 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=1749, Invalid=9381, Unknown=0, NotChecked=0, Total=11130 [2023-04-03 02:08:21,764 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 26466 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 12340 mSolverCounterSat, 414 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26480 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 12754 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 414 IncrementalHoareTripleChecker+Valid, 12340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:08:21,764 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26480 Valid, 279 Invalid, 12754 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [414 Valid, 12340 Invalid, 0 Unknown, 0 Unchecked, 9.1s Time] [2023-04-03 02:08:21,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6230 states. [2023-04-03 02:08:22,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6230 to 5030. [2023-04-03 02:08:22,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5030 states, 4962 states have (on average 1.6535671100362757) internal successors, (8205), 4967 states have internal predecessors, (8205), 32 states have call successors, (32), 32 states have call predecessors, (32), 35 states have return successors, (36), 30 states have call predecessors, (36), 31 states have call successors, (36) [2023-04-03 02:08:22,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5030 states to 5030 states and 8273 transitions. [2023-04-03 02:08:22,541 INFO L78 Accepts]: Start accepts. Automaton has 5030 states and 8273 transitions. Word has length 172 [2023-04-03 02:08:22,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:08:22,542 INFO L495 AbstractCegarLoop]: Abstraction has 5030 states and 8273 transitions. [2023-04-03 02:08:22,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 19 states have (on average 8.0) internal successors, (152), 20 states have internal predecessors, (152), 10 states have call successors, (11), 8 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-04-03 02:08:22,542 INFO L276 IsEmpty]: Start isEmpty. Operand 5030 states and 8273 transitions. [2023-04-03 02:08:22,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2023-04-03 02:08:22,550 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:08:22,550 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:08:22,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-04-03 02:08:22,550 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:08:22,551 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:08:22,551 INFO L85 PathProgramCache]: Analyzing trace with hash -675053672, now seen corresponding path program 1 times [2023-04-03 02:08:22,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:08:22,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369584705] [2023-04-03 02:08:22,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:08:22,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:08:22,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:08:34,254 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 02:08:34,254 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:08:34,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369584705] [2023-04-03 02:08:34,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369584705] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:08:34,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:08:34,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2023-04-03 02:08:34,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590753415] [2023-04-03 02:08:34,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:08:34,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-04-03 02:08:34,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:08:34,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-04-03 02:08:34,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=1030, Unknown=0, NotChecked=0, Total=1122 [2023-04-03 02:08:34,256 INFO L87 Difference]: Start difference. First operand 5030 states and 8273 transitions. Second operand has 34 states, 22 states have (on average 7.0) internal successors, (154), 23 states have internal predecessors, (154), 10 states have call successors, (11), 8 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-04-03 02:08:59,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:08:59,732 INFO L93 Difference]: Finished difference Result 34486 states and 57056 transitions. [2023-04-03 02:08:59,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2023-04-03 02:08:59,733 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 22 states have (on average 7.0) internal successors, (154), 23 states have internal predecessors, (154), 10 states have call successors, (11), 8 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 174 [2023-04-03 02:08:59,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:08:59,813 INFO L225 Difference]: With dead ends: 34486 [2023-04-03 02:08:59,813 INFO L226 Difference]: Without dead ends: 29479 [2023-04-03 02:08:59,828 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2568 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=1531, Invalid=8569, Unknown=0, NotChecked=0, Total=10100 [2023-04-03 02:08:59,829 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 33682 mSDsluCounter, 466 mSDsCounter, 0 mSdLazyCounter, 18990 mSolverCounterSat, 334 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33697 SdHoareTripleChecker+Valid, 519 SdHoareTripleChecker+Invalid, 19324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 334 IncrementalHoareTripleChecker+Valid, 18990 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.9s IncrementalHoareTripleChecker+Time [2023-04-03 02:08:59,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33697 Valid, 519 Invalid, 19324 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [334 Valid, 18990 Invalid, 0 Unknown, 0 Unchecked, 13.9s Time] [2023-04-03 02:08:59,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29479 states. [2023-04-03 02:09:03,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29479 to 19865. [2023-04-03 02:09:03,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19865 states, 19797 states have (on average 1.6281759862605445) internal successors, (32233), 19802 states have internal predecessors, (32233), 32 states have call successors, (32), 32 states have call predecessors, (32), 35 states have return successors, (36), 30 states have call predecessors, (36), 31 states have call successors, (36) [2023-04-03 02:09:03,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19865 states to 19865 states and 32301 transitions. [2023-04-03 02:09:03,875 INFO L78 Accepts]: Start accepts. Automaton has 19865 states and 32301 transitions. Word has length 174 [2023-04-03 02:09:03,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:09:03,876 INFO L495 AbstractCegarLoop]: Abstraction has 19865 states and 32301 transitions. [2023-04-03 02:09:03,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 22 states have (on average 7.0) internal successors, (154), 23 states have internal predecessors, (154), 10 states have call successors, (11), 8 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-04-03 02:09:03,876 INFO L276 IsEmpty]: Start isEmpty. Operand 19865 states and 32301 transitions. [2023-04-03 02:09:03,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2023-04-03 02:09:03,914 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:09:03,914 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:09:03,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-04-03 02:09:03,914 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:09:03,915 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:09:03,915 INFO L85 PathProgramCache]: Analyzing trace with hash 2122475672, now seen corresponding path program 1 times [2023-04-03 02:09:03,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:09:03,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081561854] [2023-04-03 02:09:03,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:09:03,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:09:04,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:09:12,242 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 02:09:12,242 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:09:12,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081561854] [2023-04-03 02:09:12,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081561854] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:09:12,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:09:12,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2023-04-03 02:09:12,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337104989] [2023-04-03 02:09:12,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:09:12,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-04-03 02:09:12,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:09:12,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-04-03 02:09:12,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2023-04-03 02:09:12,244 INFO L87 Difference]: Start difference. First operand 19865 states and 32301 transitions. Second operand has 27 states, 15 states have (on average 10.266666666666667) internal successors, (154), 16 states have internal predecessors, (154), 10 states have call successors, (11), 8 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-04-03 02:09:27,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:09:27,673 INFO L93 Difference]: Finished difference Result 32260 states and 52326 transitions. [2023-04-03 02:09:27,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2023-04-03 02:09:27,674 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 15 states have (on average 10.266666666666667) internal successors, (154), 16 states have internal predecessors, (154), 10 states have call successors, (11), 8 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 174 [2023-04-03 02:09:27,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:09:27,751 INFO L225 Difference]: With dead ends: 32260 [2023-04-03 02:09:27,751 INFO L226 Difference]: Without dead ends: 32169 [2023-04-03 02:09:27,764 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1843 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1168, Invalid=5474, Unknown=0, NotChecked=0, Total=6642 [2023-04-03 02:09:27,765 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 6133 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 12871 mSolverCounterSat, 203 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6144 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 13074 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 203 IncrementalHoareTripleChecker+Valid, 12871 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2023-04-03 02:09:27,765 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6144 Valid, 309 Invalid, 13074 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [203 Valid, 12871 Invalid, 0 Unknown, 0 Unchecked, 6.6s Time] [2023-04-03 02:09:27,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32169 states. [2023-04-03 02:09:32,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32169 to 23024. [2023-04-03 02:09:32,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23024 states, 22956 states have (on average 1.634648893535459) internal successors, (37525), 22961 states have internal predecessors, (37525), 32 states have call successors, (32), 32 states have call predecessors, (32), 35 states have return successors, (36), 30 states have call predecessors, (36), 31 states have call successors, (36) [2023-04-03 02:09:32,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23024 states to 23024 states and 37593 transitions. [2023-04-03 02:09:32,668 INFO L78 Accepts]: Start accepts. Automaton has 23024 states and 37593 transitions. Word has length 174 [2023-04-03 02:09:32,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:09:32,669 INFO L495 AbstractCegarLoop]: Abstraction has 23024 states and 37593 transitions. [2023-04-03 02:09:32,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 15 states have (on average 10.266666666666667) internal successors, (154), 16 states have internal predecessors, (154), 10 states have call successors, (11), 8 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-04-03 02:09:32,669 INFO L276 IsEmpty]: Start isEmpty. Operand 23024 states and 37593 transitions. [2023-04-03 02:09:32,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2023-04-03 02:09:32,711 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:09:32,711 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:09:32,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-04-03 02:09:32,711 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:09:32,711 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:09:32,711 INFO L85 PathProgramCache]: Analyzing trace with hash 756304536, now seen corresponding path program 1 times [2023-04-03 02:09:32,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:09:32,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996256276] [2023-04-03 02:09:32,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:09:32,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:09:33,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:09:39,899 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 02:09:39,899 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:09:39,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996256276] [2023-04-03 02:09:39,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996256276] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:09:39,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:09:39,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2023-04-03 02:09:39,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111851622] [2023-04-03 02:09:39,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:09:39,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-04-03 02:09:39,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:09:39,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-04-03 02:09:39,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2023-04-03 02:09:39,901 INFO L87 Difference]: Start difference. First operand 23024 states and 37593 transitions. Second operand has 24 states, 12 states have (on average 12.833333333333334) internal successors, (154), 14 states have internal predecessors, (154), 9 states have call successors, (11), 7 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2023-04-03 02:09:50,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:09:50,041 INFO L93 Difference]: Finished difference Result 23159 states and 37750 transitions. [2023-04-03 02:09:50,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-04-03 02:09:50,042 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 12 states have (on average 12.833333333333334) internal successors, (154), 14 states have internal predecessors, (154), 9 states have call successors, (11), 7 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) Word has length 174 [2023-04-03 02:09:50,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:09:50,086 INFO L225 Difference]: With dead ends: 23159 [2023-04-03 02:09:50,086 INFO L226 Difference]: Without dead ends: 23068 [2023-04-03 02:09:50,094 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 521 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=591, Invalid=1959, Unknown=0, NotChecked=0, Total=2550 [2023-04-03 02:09:50,095 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 4755 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 8917 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4759 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 9082 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 8917 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2023-04-03 02:09:50,095 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4759 Valid, 213 Invalid, 9082 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 8917 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2023-04-03 02:09:50,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23068 states. [2023-04-03 02:09:53,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23068 to 16021. [2023-04-03 02:09:53,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16021 states, 15969 states have (on average 1.6293443546872064) internal successors, (26019), 15972 states have internal predecessors, (26019), 25 states have call successors, (25), 25 states have call predecessors, (25), 26 states have return successors, (27), 23 states have call predecessors, (27), 24 states have call successors, (27) [2023-04-03 02:09:53,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16021 states to 16021 states and 26071 transitions. [2023-04-03 02:09:53,809 INFO L78 Accepts]: Start accepts. Automaton has 16021 states and 26071 transitions. Word has length 174 [2023-04-03 02:09:53,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:09:53,809 INFO L495 AbstractCegarLoop]: Abstraction has 16021 states and 26071 transitions. [2023-04-03 02:09:53,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 12 states have (on average 12.833333333333334) internal successors, (154), 14 states have internal predecessors, (154), 9 states have call successors, (11), 7 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2023-04-03 02:09:53,810 INFO L276 IsEmpty]: Start isEmpty. Operand 16021 states and 26071 transitions. [2023-04-03 02:09:53,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2023-04-03 02:09:53,835 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:09:53,836 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:09:53,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-04-03 02:09:53,836 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:09:53,836 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:09:53,836 INFO L85 PathProgramCache]: Analyzing trace with hash 862324658, now seen corresponding path program 1 times [2023-04-03 02:09:53,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:09:53,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420016066] [2023-04-03 02:09:53,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:09:53,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:09:56,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat