/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_floodmax.3.2.ufo.UNBOUNDED.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 06:14:01,138 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 06:14:01,140 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 06:14:01,172 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 06:14:01,173 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 06:14:01,175 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 06:14:01,180 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 06:14:01,182 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 06:14:01,183 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 06:14:01,188 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 06:14:01,189 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 06:14:01,190 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 06:14:01,190 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 06:14:01,193 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 06:14:01,193 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 06:14:01,194 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 06:14:01,195 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 06:14:01,195 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 06:14:01,197 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 06:14:01,201 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 06:14:01,202 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 06:14:01,203 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 06:14:01,203 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 06:14:01,204 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 06:14:01,211 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 06:14:01,211 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 06:14:01,211 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 06:14:01,212 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 06:14:01,213 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 06:14:01,213 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 06:14:01,213 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 06:14:01,214 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 06:14:01,215 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 06:14:01,216 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 06:14:01,216 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 06:14:01,216 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 06:14:01,217 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 06:14:01,217 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 06:14:01,217 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 06:14:01,217 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 06:14:01,218 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 06:14:01,219 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 06:14:01,242 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 06:14:01,243 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 06:14:01,243 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 06:14:01,243 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 06:14:01,244 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 06:14:01,244 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 06:14:01,244 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 06:14:01,244 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 06:14:01,244 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 06:14:01,245 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 06:14:01,245 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 06:14:01,245 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 06:14:01,246 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 06:14:01,246 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 06:14:01,246 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 06:14:01,246 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 06:14:01,246 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 06:14:01,246 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 06:14:01,247 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 06:14:01,247 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 06:14:01,247 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 06:14:01,247 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 06:14:01,247 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 06:14:01,248 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 06:14:01,248 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 06:14:01,248 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 06:14:01,248 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 06:14:01,248 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 06:14:01,248 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 06:14:01,248 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 06:14:01,249 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 06:14:01,249 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 06:14:01,249 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 06:14:01,249 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 06:14:01,249 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 06:14:01,249 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 06:14:01,249 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 06:14:01,250 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 06:14:01,250 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 06:14:01,250 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 06:14:01,250 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 06:14:01,250 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 06:14:01,450 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 06:14:01,471 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 06:14:01,473 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 06:14:01,474 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 06:14:01,475 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 06:14:01,476 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_floodmax.3.2.ufo.UNBOUNDED.pals.c [2023-04-01 06:14:02,487 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 06:14:02,683 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 06:14:02,683 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_floodmax.3.2.ufo.UNBOUNDED.pals.c [2023-04-01 06:14:02,692 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/14d517e62/1dfb3e6f523144f1981622722db29b5f/FLAG2578df561 [2023-04-01 06:14:02,706 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/14d517e62/1dfb3e6f523144f1981622722db29b5f [2023-04-01 06:14:02,708 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 06:14:02,709 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 06:14:02,711 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 06:14:02,712 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 06:14:02,714 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 06:14:02,715 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 06:14:02" (1/1) ... [2023-04-01 06:14:02,716 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b3a6704 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:14:02, skipping insertion in model container [2023-04-01 06:14:02,716 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 06:14:02" (1/1) ... [2023-04-01 06:14:02,721 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 06:14:02,756 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 06:14:02,952 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_floodmax.3.2.ufo.UNBOUNDED.pals.c[12914,12927] [2023-04-01 06:14:02,955 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 06:14:02,967 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 06:14:03,011 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_floodmax.3.2.ufo.UNBOUNDED.pals.c[12914,12927] [2023-04-01 06:14:03,012 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 06:14:03,022 INFO L208 MainTranslator]: Completed translation [2023-04-01 06:14:03,023 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:14:03 WrapperNode [2023-04-01 06:14:03,023 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 06:14:03,024 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 06:14:03,024 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 06:14:03,024 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 06:14:03,032 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:14:03" (1/1) ... [2023-04-01 06:14:03,032 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:14:03" (1/1) ... [2023-04-01 06:14:03,054 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:14:03" (1/1) ... [2023-04-01 06:14:03,055 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:14:03" (1/1) ... [2023-04-01 06:14:03,076 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:14:03" (1/1) ... [2023-04-01 06:14:03,082 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:14:03" (1/1) ... [2023-04-01 06:14:03,084 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:14:03" (1/1) ... [2023-04-01 06:14:03,086 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:14:03" (1/1) ... [2023-04-01 06:14:03,088 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 06:14:03,089 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 06:14:03,089 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 06:14:03,089 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 06:14:03,089 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:14:03" (1/1) ... [2023-04-01 06:14:03,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 06:14:03,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 06:14:03,121 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 06:14:03,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 06:14:03,152 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 06:14:03,152 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 06:14:03,152 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 06:14:03,153 INFO L138 BoogieDeclarations]: Found implementation of procedure node1 [2023-04-01 06:14:03,153 INFO L138 BoogieDeclarations]: Found implementation of procedure node2 [2023-04-01 06:14:03,154 INFO L138 BoogieDeclarations]: Found implementation of procedure node3 [2023-04-01 06:14:03,154 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2023-04-01 06:14:03,154 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2023-04-01 06:14:03,154 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 06:14:03,154 INFO L138 BoogieDeclarations]: Found implementation of procedure assert [2023-04-01 06:14:03,154 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 06:14:03,154 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 06:14:03,154 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 06:14:03,154 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 06:14:03,154 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-01 06:14:03,154 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2023-04-01 06:14:03,154 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-01 06:14:03,154 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-01 06:14:03,155 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-01 06:14:03,155 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-01 06:14:03,155 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-01 06:14:03,155 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-01 06:14:03,155 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-01 06:14:03,155 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-01 06:14:03,155 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-01 06:14:03,155 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 06:14:03,155 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 06:14:03,155 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 06:14:03,155 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 06:14:03,155 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 06:14:03,155 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 06:14:03,155 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 06:14:03,254 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 06:14:03,256 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 06:14:03,661 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 06:14:04,016 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 06:14:04,016 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 06:14:04,019 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 06:14:04 BoogieIcfgContainer [2023-04-01 06:14:04,019 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 06:14:04,021 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 06:14:04,021 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 06:14:04,023 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 06:14:04,023 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 06:14:02" (1/3) ... [2023-04-01 06:14:04,024 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@421f9adf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 06:14:04, skipping insertion in model container [2023-04-01 06:14:04,024 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:14:03" (2/3) ... [2023-04-01 06:14:04,024 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@421f9adf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 06:14:04, skipping insertion in model container [2023-04-01 06:14:04,024 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 06:14:04" (3/3) ... [2023-04-01 06:14:04,025 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.2.ufo.UNBOUNDED.pals.c [2023-04-01 06:14:04,037 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 06:14:04,038 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 06:14:04,075 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 06:14:04,079 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;@2e3ee5a0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 06:14:04,080 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 06:14:04,084 INFO L276 IsEmpty]: Start isEmpty. Operand has 46 states, 28 states have (on average 1.4642857142857142) internal successors, (41), 30 states have internal predecessors, (41), 8 states have call successors, (8), 8 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-04-01 06:14:04,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-04-01 06:14:04,090 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:14:04,091 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:14:04,092 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:14:04,097 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:14:04,097 INFO L85 PathProgramCache]: Analyzing trace with hash -133399680, now seen corresponding path program 1 times [2023-04-01 06:14:04,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:14:04,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265490004] [2023-04-01 06:14:04,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:14:04,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:14:04,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:14:06,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:14:06,884 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:14:06,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265490004] [2023-04-01 06:14:06,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265490004] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:14:06,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:14:06,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2023-04-01 06:14:06,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697875586] [2023-04-01 06:14:06,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:14:06,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-04-01 06:14:06,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:14:06,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-04-01 06:14:06,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2023-04-01 06:14:06,908 INFO L87 Difference]: Start difference. First operand has 46 states, 28 states have (on average 1.4642857142857142) internal successors, (41), 30 states have internal predecessors, (41), 8 states have call successors, (8), 8 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 15 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 6 states have call successors, (8), 5 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2023-04-01 06:14:07,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:14:07,524 INFO L93 Difference]: Finished difference Result 130 states and 175 transitions. [2023-04-01 06:14:07,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-04-01 06:14:07,542 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 6 states have call successors, (8), 5 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 30 [2023-04-01 06:14:07,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:14:07,548 INFO L225 Difference]: With dead ends: 130 [2023-04-01 06:14:07,548 INFO L226 Difference]: Without dead ends: 93 [2023-04-01 06:14:07,551 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=202, Invalid=554, Unknown=0, NotChecked=0, Total=756 [2023-04-01 06:14:07,554 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 248 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 06:14:07,555 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [251 Valid, 85 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 394 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 06:14:07,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2023-04-01 06:14:07,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 69. [2023-04-01 06:14:07,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 45 states have (on average 1.4444444444444444) internal successors, (65), 46 states have internal predecessors, (65), 12 states have call successors, (12), 12 states have call predecessors, (12), 11 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) [2023-04-01 06:14:07,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 89 transitions. [2023-04-01 06:14:07,607 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 89 transitions. Word has length 30 [2023-04-01 06:14:07,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:14:07,608 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 89 transitions. [2023-04-01 06:14:07,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 6 states have call successors, (8), 5 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2023-04-01 06:14:07,608 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 89 transitions. [2023-04-01 06:14:07,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-04-01 06:14:07,609 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:14:07,609 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] [2023-04-01 06:14:07,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 06:14:07,610 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:14:07,611 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:14:07,611 INFO L85 PathProgramCache]: Analyzing trace with hash -1380709792, now seen corresponding path program 1 times [2023-04-01 06:14:07,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:14:07,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939114515] [2023-04-01 06:14:07,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:14:07,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:14:07,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:14:08,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:14:08,616 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:14:08,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939114515] [2023-04-01 06:14:08,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939114515] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:14:08,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:14:08,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-01 06:14:08,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260724115] [2023-04-01 06:14:08,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:14:08,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 06:14:08,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:14:08,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 06:14:08,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-04-01 06:14:08,618 INFO L87 Difference]: Start difference. First operand 69 states and 89 transitions. Second operand has 9 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-04-01 06:14:08,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:14:08,915 INFO L93 Difference]: Finished difference Result 141 states and 181 transitions. [2023-04-01 06:14:08,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-01 06:14:08,916 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 31 [2023-04-01 06:14:08,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:14:08,917 INFO L225 Difference]: With dead ends: 141 [2023-04-01 06:14:08,917 INFO L226 Difference]: Without dead ends: 100 [2023-04-01 06:14:08,918 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2023-04-01 06:14:08,919 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 106 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 06:14:08,919 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 60 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 06:14:08,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2023-04-01 06:14:08,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 69. [2023-04-01 06:14:08,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 45 states have (on average 1.4222222222222223) internal successors, (64), 46 states have internal predecessors, (64), 12 states have call successors, (12), 12 states have call predecessors, (12), 11 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2023-04-01 06:14:08,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 87 transitions. [2023-04-01 06:14:08,931 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 87 transitions. Word has length 31 [2023-04-01 06:14:08,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:14:08,931 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 87 transitions. [2023-04-01 06:14:08,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-04-01 06:14:08,932 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 87 transitions. [2023-04-01 06:14:08,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-04-01 06:14:08,932 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:14:08,932 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] [2023-04-01 06:14:08,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 06:14:08,932 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:14:08,933 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:14:08,933 INFO L85 PathProgramCache]: Analyzing trace with hash -285906199, now seen corresponding path program 1 times [2023-04-01 06:14:08,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:14:08,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414294741] [2023-04-01 06:14:08,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:14:08,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:14:08,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:14:09,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:14:09,874 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:14:09,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414294741] [2023-04-01 06:14:09,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414294741] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:14:09,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:14:09,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-01 06:14:09,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295920698] [2023-04-01 06:14:09,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:14:09,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 06:14:09,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:14:09,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 06:14:09,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-04-01 06:14:09,877 INFO L87 Difference]: Start difference. First operand 69 states and 87 transitions. Second operand has 9 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2023-04-01 06:14:10,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:14:10,212 INFO L93 Difference]: Finished difference Result 135 states and 165 transitions. [2023-04-01 06:14:10,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-01 06:14:10,212 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 32 [2023-04-01 06:14:10,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:14:10,213 INFO L225 Difference]: With dead ends: 135 [2023-04-01 06:14:10,213 INFO L226 Difference]: Without dead ends: 99 [2023-04-01 06:14:10,214 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2023-04-01 06:14:10,214 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 168 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 344 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 06:14:10,215 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 63 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 344 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 06:14:10,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2023-04-01 06:14:10,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 69. [2023-04-01 06:14:10,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 45 states have (on average 1.4) internal successors, (63), 46 states have internal predecessors, (63), 12 states have call successors, (12), 12 states have call predecessors, (12), 11 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2023-04-01 06:14:10,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 86 transitions. [2023-04-01 06:14:10,230 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 86 transitions. Word has length 32 [2023-04-01 06:14:10,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:14:10,230 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 86 transitions. [2023-04-01 06:14:10,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2023-04-01 06:14:10,231 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 86 transitions. [2023-04-01 06:14:10,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-04-01 06:14:10,232 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:14:10,232 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] [2023-04-01 06:14:10,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 06:14:10,234 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:14:10,234 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:14:10,234 INFO L85 PathProgramCache]: Analyzing trace with hash 399978217, now seen corresponding path program 1 times [2023-04-01 06:14:10,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:14:10,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125315248] [2023-04-01 06:14:10,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:14:10,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:14:10,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:14:11,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:14:11,098 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:14:11,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125315248] [2023-04-01 06:14:11,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125315248] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:14:11,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:14:11,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-01 06:14:11,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613492628] [2023-04-01 06:14:11,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:14:11,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 06:14:11,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:14:11,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 06:14:11,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-04-01 06:14:11,100 INFO L87 Difference]: Start difference. First operand 69 states and 86 transitions. Second operand has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2023-04-01 06:14:11,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:14:11,429 INFO L93 Difference]: Finished difference Result 141 states and 170 transitions. [2023-04-01 06:14:11,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-01 06:14:11,430 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 33 [2023-04-01 06:14:11,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:14:11,431 INFO L225 Difference]: With dead ends: 141 [2023-04-01 06:14:11,431 INFO L226 Difference]: Without dead ends: 105 [2023-04-01 06:14:11,432 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2023-04-01 06:14:11,432 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 173 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 06:14:11,433 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 60 Invalid, 374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 334 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 06:14:11,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2023-04-01 06:14:11,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 69. [2023-04-01 06:14:11,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 45 states have (on average 1.3777777777777778) internal successors, (62), 46 states have internal predecessors, (62), 12 states have call successors, (12), 12 states have call predecessors, (12), 11 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2023-04-01 06:14:11,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 85 transitions. [2023-04-01 06:14:11,447 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 85 transitions. Word has length 33 [2023-04-01 06:14:11,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:14:11,447 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 85 transitions. [2023-04-01 06:14:11,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2023-04-01 06:14:11,447 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 85 transitions. [2023-04-01 06:14:11,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-04-01 06:14:11,448 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:14:11,448 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] [2023-04-01 06:14:11,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 06:14:11,448 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:14:11,448 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:14:11,448 INFO L85 PathProgramCache]: Analyzing trace with hash 1672778769, now seen corresponding path program 1 times [2023-04-01 06:14:11,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:14:11,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666695205] [2023-04-01 06:14:11,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:14:11,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:14:11,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:14:12,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:14:12,862 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:14:12,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666695205] [2023-04-01 06:14:12,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666695205] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:14:12,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:14:12,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2023-04-01 06:14:12,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543835527] [2023-04-01 06:14:12,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:14:12,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-04-01 06:14:12,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:14:12,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-04-01 06:14:12,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2023-04-01 06:14:12,869 INFO L87 Difference]: Start difference. First operand 69 states and 85 transitions. Second operand has 15 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 6 states have call successors, (8), 5 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2023-04-01 06:14:13,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:14:13,449 INFO L93 Difference]: Finished difference Result 142 states and 179 transitions. [2023-04-01 06:14:13,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-04-01 06:14:13,450 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 6 states have call successors, (8), 5 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 35 [2023-04-01 06:14:13,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:14:13,451 INFO L225 Difference]: With dead ends: 142 [2023-04-01 06:14:13,451 INFO L226 Difference]: Without dead ends: 103 [2023-04-01 06:14:13,451 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=202, Invalid=554, Unknown=0, NotChecked=0, Total=756 [2023-04-01 06:14:13,452 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 296 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 06:14:13,452 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [299 Valid, 88 Invalid, 534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 455 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 06:14:13,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2023-04-01 06:14:13,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 71. [2023-04-01 06:14:13,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 47 states have (on average 1.3404255319148937) internal successors, (63), 48 states have internal predecessors, (63), 12 states have call successors, (12), 12 states have call predecessors, (12), 11 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2023-04-01 06:14:13,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 86 transitions. [2023-04-01 06:14:13,472 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 86 transitions. Word has length 35 [2023-04-01 06:14:13,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:14:13,474 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 86 transitions. [2023-04-01 06:14:13,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 6 states have call successors, (8), 5 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2023-04-01 06:14:13,474 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 86 transitions. [2023-04-01 06:14:13,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-04-01 06:14:13,476 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:14:13,476 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] [2023-04-01 06:14:13,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 06:14:13,476 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:14:13,476 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:14:13,476 INFO L85 PathProgramCache]: Analyzing trace with hash 893989984, now seen corresponding path program 1 times [2023-04-01 06:14:13,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:14:13,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550241732] [2023-04-01 06:14:13,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:14:13,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:14:13,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:14:14,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:14:14,449 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:14:14,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550241732] [2023-04-01 06:14:14,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550241732] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:14:14,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:14:14,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-01 06:14:14,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440609934] [2023-04-01 06:14:14,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:14:14,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 06:14:14,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:14:14,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 06:14:14,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-04-01 06:14:14,451 INFO L87 Difference]: Start difference. First operand 71 states and 86 transitions. Second operand has 9 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-04-01 06:14:14,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:14:14,793 INFO L93 Difference]: Finished difference Result 155 states and 194 transitions. [2023-04-01 06:14:14,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-01 06:14:14,794 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 36 [2023-04-01 06:14:14,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:14:14,795 INFO L225 Difference]: With dead ends: 155 [2023-04-01 06:14:14,795 INFO L226 Difference]: Without dead ends: 112 [2023-04-01 06:14:14,795 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2023-04-01 06:14:14,796 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 106 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 06:14:14,796 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 64 Invalid, 371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 334 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 06:14:14,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2023-04-01 06:14:14,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 97. [2023-04-01 06:14:14,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 63 states have (on average 1.2380952380952381) internal successors, (78), 64 states have internal predecessors, (78), 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) [2023-04-01 06:14:14,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 112 transitions. [2023-04-01 06:14:14,817 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 112 transitions. Word has length 36 [2023-04-01 06:14:14,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:14:14,817 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 112 transitions. [2023-04-01 06:14:14,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-04-01 06:14:14,817 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 112 transitions. [2023-04-01 06:14:14,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-04-01 06:14:14,821 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:14:14,821 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] [2023-04-01 06:14:14,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-01 06:14:14,821 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:14:14,822 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:14:14,822 INFO L85 PathProgramCache]: Analyzing trace with hash -1451956474, now seen corresponding path program 1 times [2023-04-01 06:14:14,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:14:14,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787797305] [2023-04-01 06:14:14,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:14:14,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:14:14,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:14:17,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:14:17,521 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:14:17,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787797305] [2023-04-01 06:14:17,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787797305] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:14:17,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:14:17,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2023-04-01 06:14:17,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227307349] [2023-04-01 06:14:17,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:14:17,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-04-01 06:14:17,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:14:17,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-04-01 06:14:17,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2023-04-01 06:14:17,522 INFO L87 Difference]: Start difference. First operand 97 states and 112 transitions. Second operand has 17 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 7 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-01 06:14:19,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:14:19,153 INFO L93 Difference]: Finished difference Result 188 states and 219 transitions. [2023-04-01 06:14:19,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-04-01 06:14:19,153 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 7 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 38 [2023-04-01 06:14:19,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:14:19,154 INFO L225 Difference]: With dead ends: 188 [2023-04-01 06:14:19,154 INFO L226 Difference]: Without dead ends: 123 [2023-04-01 06:14:19,155 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=339, Invalid=1301, Unknown=0, NotChecked=0, Total=1640 [2023-04-01 06:14:19,155 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 257 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 567 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-01 06:14:19,156 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [263 Valid, 99 Invalid, 652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 567 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-01 06:14:19,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2023-04-01 06:14:19,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 97. [2023-04-01 06:14:19,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 63 states have (on average 1.2222222222222223) internal successors, (77), 64 states have internal predecessors, (77), 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) [2023-04-01 06:14:19,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 111 transitions. [2023-04-01 06:14:19,175 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 111 transitions. Word has length 38 [2023-04-01 06:14:19,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:14:19,175 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 111 transitions. [2023-04-01 06:14:19,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 7 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-01 06:14:19,175 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 111 transitions. [2023-04-01 06:14:19,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-04-01 06:14:19,175 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:14:19,176 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] [2023-04-01 06:14:19,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-01 06:14:19,176 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:14:19,176 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:14:19,176 INFO L85 PathProgramCache]: Analyzing trace with hash 1040206869, now seen corresponding path program 1 times [2023-04-01 06:14:19,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:14:19,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135697669] [2023-04-01 06:14:19,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:14:19,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:14:19,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:14:19,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:14:19,382 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:14:19,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135697669] [2023-04-01 06:14:19,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135697669] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:14:19,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:14:19,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-01 06:14:19,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543228063] [2023-04-01 06:14:19,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:14:19,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 06:14:19,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:14:19,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 06:14:19,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-04-01 06:14:19,386 INFO L87 Difference]: Start difference. First operand 97 states and 111 transitions. Second operand has 9 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2023-04-01 06:14:19,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:14:19,557 INFO L93 Difference]: Finished difference Result 130 states and 152 transitions. [2023-04-01 06:14:19,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 06:14:19,558 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 39 [2023-04-01 06:14:19,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:14:19,560 INFO L225 Difference]: With dead ends: 130 [2023-04-01 06:14:19,560 INFO L226 Difference]: Without dead ends: 128 [2023-04-01 06:14:19,560 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2023-04-01 06:14:19,561 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 33 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 399 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 06:14:19,561 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 399 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 06:14:19,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2023-04-01 06:14:19,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 105. [2023-04-01 06:14:19,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 68 states have (on average 1.2058823529411764) internal successors, (82), 70 states have internal predecessors, (82), 18 states have call successors, (18), 18 states have call predecessors, (18), 18 states have return successors, (19), 16 states have call predecessors, (19), 17 states have call successors, (19) [2023-04-01 06:14:19,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 119 transitions. [2023-04-01 06:14:19,589 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 119 transitions. Word has length 39 [2023-04-01 06:14:19,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:14:19,590 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 119 transitions. [2023-04-01 06:14:19,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2023-04-01 06:14:19,590 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 119 transitions. [2023-04-01 06:14:19,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-04-01 06:14:19,591 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:14:19,592 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-01 06:14:19,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-01 06:14:19,592 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:14:19,592 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:14:19,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1529896765, now seen corresponding path program 1 times [2023-04-01 06:14:19,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:14:19,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032319781] [2023-04-01 06:14:19,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:14:19,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:14:19,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:14:22,461 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 06:14:22,462 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:14:22,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032319781] [2023-04-01 06:14:22,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032319781] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 06:14:22,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808656808] [2023-04-01 06:14:22,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:14:22,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 06:14:22,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 06:14:22,465 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 06:14:22,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 06:14:22,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:14:22,680 INFO L262 TraceCheckSpWp]: Trace formula consists of 932 conjuncts, 80 conjunts are in the unsatisfiable core [2023-04-01 06:14:22,692 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 06:14:32,050 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:14:32,050 INFO L327 TraceCheckSpWp]: Computing backward predicates...