/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.2.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 06:34:33,081 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 06:34:33,083 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 06:34:33,107 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 06:34:33,107 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 06:34:33,108 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 06:34:33,112 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 06:34:33,114 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 06:34:33,115 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 06:34:33,120 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 06:34:33,121 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 06:34:33,122 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 06:34:33,122 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 06:34:33,126 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 06:34:33,126 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 06:34:33,128 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 06:34:33,129 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 06:34:33,130 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 06:34:33,132 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 06:34:33,135 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 06:34:33,136 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 06:34:33,137 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 06:34:33,138 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 06:34:33,138 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 06:34:33,140 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-01 06:34:33,142 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 06:34:33,142 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 06:34:33,143 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 06:34:33,143 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 06:34:33,143 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 06:34:33,144 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 06:34:33,144 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 06:34:33,144 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 06:34:33,144 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 06:34:33,145 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 06:34:33,145 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 06:34:33,148 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 06:34:33,176 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 06:34:33,176 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 06:34:33,176 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 06:34:33,176 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 06:34:33,177 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 06:34:33,177 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 06:34:33,177 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 06:34:33,177 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 06:34:33,177 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 06:34:33,177 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 06:34:33,178 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 06:34:33,178 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 06:34:33,178 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 06:34:33,178 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 06:34:33,178 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 06:34:33,178 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 06:34:33,178 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 06:34:33,179 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 06:34:33,179 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 06:34:33,179 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 06:34:33,179 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 06:34:33,179 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 06:34:33,179 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 06:34:33,179 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 06:34:33,180 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 06:34:33,180 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 06:34:33,180 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 06:34:33,180 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 06:34:33,180 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 06:34:33,180 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 06:34:33,181 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 06:34:33,181 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 06:34:33,181 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 06:34:33,181 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 06:34:33,181 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 06:34:33,181 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 06:34:33,181 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 06:34:33,181 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 06:34:33,181 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 06:34:33,181 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 06:34:33,181 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 06:34:33,182 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 06:34:33,360 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 06:34:33,373 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 06:34:33,374 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 06:34:33,375 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 06:34:33,375 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 06:34:33,376 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.2.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c [2023-04-01 06:34:34,294 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 06:34:34,497 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 06:34:34,498 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.2.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c [2023-04-01 06:34:34,507 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/581a33014/9f57716f16dc4ed38249600c9d519e0b/FLAGe042ea8ec [2023-04-01 06:34:34,516 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/581a33014/9f57716f16dc4ed38249600c9d519e0b [2023-04-01 06:34:34,517 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 06:34:34,518 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 06:34:34,519 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 06:34:34,519 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 06:34:34,521 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 06:34:34,521 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 06:34:34" (1/1) ... [2023-04-01 06:34:34,522 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3fc41824 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:34:34, skipping insertion in model container [2023-04-01 06:34:34,522 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 06:34:34" (1/1) ... [2023-04-01 06:34:34,526 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 06:34:34,577 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 06:34:34,801 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.2.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c[13215,13228] [2023-04-01 06:34:34,904 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 06:34:34,914 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 06:34:34,989 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.2.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c[13215,13228] [2023-04-01 06:34:35,018 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 06:34:35,031 INFO L208 MainTranslator]: Completed translation [2023-04-01 06:34:35,032 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:34:35 WrapperNode [2023-04-01 06:34:35,032 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 06:34:35,032 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 06:34:35,035 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 06:34:35,036 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 06:34:35,044 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:34:35" (1/1) ... [2023-04-01 06:34:35,044 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:34:35" (1/1) ... [2023-04-01 06:34:35,068 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:34:35" (1/1) ... [2023-04-01 06:34:35,068 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:34:35" (1/1) ... [2023-04-01 06:34:35,085 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:34:35" (1/1) ... [2023-04-01 06:34:35,107 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:34:35" (1/1) ... [2023-04-01 06:34:35,111 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:34:35" (1/1) ... [2023-04-01 06:34:35,114 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:34:35" (1/1) ... [2023-04-01 06:34:35,119 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 06:34:35,120 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 06:34:35,120 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 06:34:35,120 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 06:34:35,137 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:34:35" (1/1) ... [2023-04-01 06:34:35,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 06:34:35,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 06:34:35,182 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 06:34:35,218 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 06:34:35,241 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 06:34:35,241 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 06:34:35,241 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 06:34:35,241 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 06:34:35,241 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 06:34:35,241 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 06:34:35,241 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 06:34:35,242 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 06:34:35,242 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 06:34:35,242 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-01 06:34:35,242 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-01 06:34:35,242 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-01 06:34:35,242 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 06:34:35,242 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-01 06:34:35,242 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-01 06:34:35,242 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-01 06:34:35,243 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-01 06:34:35,243 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-01 06:34:35,243 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2023-04-01 06:34:35,243 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2023-04-01 06:34:35,243 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-01 06:34:35,243 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-01 06:34:35,243 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 06:34:35,243 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 06:34:35,243 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 06:34:35,243 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 06:34:35,243 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 06:34:35,243 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 06:34:35,243 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 06:34:35,348 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 06:34:35,350 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 06:34:36,155 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 06:34:36,366 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 06:34:36,367 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-01 06:34:36,369 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 06:34:36 BoogieIcfgContainer [2023-04-01 06:34:36,369 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 06:34:36,370 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 06:34:36,370 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 06:34:36,372 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 06:34:36,372 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 06:34:34" (1/3) ... [2023-04-01 06:34:36,373 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a8b6989 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 06:34:36, skipping insertion in model container [2023-04-01 06:34:36,373 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:34:35" (2/3) ... [2023-04-01 06:34:36,373 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a8b6989 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 06:34:36, skipping insertion in model container [2023-04-01 06:34:36,373 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 06:34:36" (3/3) ... [2023-04-01 06:34:36,374 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.5.2.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c [2023-04-01 06:34:36,385 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 06:34:36,385 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 06:34:36,417 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 06:34:36,421 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;@43fef2f7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 06:34:36,421 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 06:34:36,425 INFO L276 IsEmpty]: Start isEmpty. Operand has 324 states, 288 states have (on average 1.5902777777777777) internal successors, (458), 319 states have internal predecessors, (458), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 06:34:36,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-04-01 06:34:36,434 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:34:36,434 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:34:36,435 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:34:36,438 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:34:36,438 INFO L85 PathProgramCache]: Analyzing trace with hash -697847818, now seen corresponding path program 1 times [2023-04-01 06:34:36,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:34:36,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878158087] [2023-04-01 06:34:36,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:34:36,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:34:36,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:34:36,863 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 06:34:36,864 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:34:36,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878158087] [2023-04-01 06:34:36,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878158087] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:34:36,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:34:36,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 06:34:36,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354520074] [2023-04-01 06:34:36,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:34:36,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 06:34:36,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:34:36,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 06:34:36,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 06:34:36,888 INFO L87 Difference]: Start difference. First operand has 324 states, 288 states have (on average 1.5902777777777777) internal successors, (458), 319 states have internal predecessors, (458), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:34:37,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:34:37,010 INFO L93 Difference]: Finished difference Result 585 states and 859 transitions. [2023-04-01 06:34:37,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 06:34:37,012 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2023-04-01 06:34:37,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:34:37,018 INFO L225 Difference]: With dead ends: 585 [2023-04-01 06:34:37,018 INFO L226 Difference]: Without dead ends: 290 [2023-04-01 06:34:37,021 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-01 06:34:37,023 INFO L413 NwaCegarLoop]: 431 mSDtfsCounter, 100 mSDsluCounter, 731 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 1162 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 06:34:37,023 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 1162 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 06:34:37,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2023-04-01 06:34:37,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 290. [2023-04-01 06:34:37,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 286 states have (on average 1.451048951048951) internal successors, (415), 286 states have internal predecessors, (415), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:34:37,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 418 transitions. [2023-04-01 06:34:37,055 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 418 transitions. Word has length 58 [2023-04-01 06:34:37,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:34:37,055 INFO L495 AbstractCegarLoop]: Abstraction has 290 states and 418 transitions. [2023-04-01 06:34:37,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:34:37,055 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 418 transitions. [2023-04-01 06:34:37,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-04-01 06:34:37,057 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:34:37,057 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] [2023-04-01 06:34:37,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 06:34:37,058 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:34:37,058 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:34:37,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1078233500, now seen corresponding path program 1 times [2023-04-01 06:34:37,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:34:37,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377074751] [2023-04-01 06:34:37,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:34:37,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:34:37,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:34:37,166 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 06:34:37,166 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:34:37,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377074751] [2023-04-01 06:34:37,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377074751] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:34:37,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:34:37,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 06:34:37,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626206066] [2023-04-01 06:34:37,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:34:37,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:34:37,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:34:37,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:34:37,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:34:37,168 INFO L87 Difference]: Start difference. First operand 290 states and 418 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:34:37,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:34:37,250 INFO L93 Difference]: Finished difference Result 702 states and 1040 transitions. [2023-04-01 06:34:37,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 06:34:37,251 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 89 [2023-04-01 06:34:37,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:34:37,253 INFO L225 Difference]: With dead ends: 702 [2023-04-01 06:34:37,253 INFO L226 Difference]: Without dead ends: 459 [2023-04-01 06:34:37,254 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:34:37,255 INFO L413 NwaCegarLoop]: 470 mSDtfsCounter, 287 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 790 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 06:34:37,255 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [287 Valid, 790 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 06:34:37,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2023-04-01 06:34:37,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 457. [2023-04-01 06:34:37,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 457 states, 453 states have (on average 1.4701986754966887) internal successors, (666), 453 states have internal predecessors, (666), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:34:37,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 669 transitions. [2023-04-01 06:34:37,280 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 669 transitions. Word has length 89 [2023-04-01 06:34:37,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:34:37,280 INFO L495 AbstractCegarLoop]: Abstraction has 457 states and 669 transitions. [2023-04-01 06:34:37,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:34:37,281 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 669 transitions. [2023-04-01 06:34:37,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2023-04-01 06:34:37,283 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:34:37,283 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] [2023-04-01 06:34:37,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 06:34:37,283 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:34:37,284 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:34:37,284 INFO L85 PathProgramCache]: Analyzing trace with hash 695073986, now seen corresponding path program 1 times [2023-04-01 06:34:37,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:34:37,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701441641] [2023-04-01 06:34:37,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:34:37,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:34:37,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:34:37,362 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 06:34:37,363 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:34:37,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701441641] [2023-04-01 06:34:37,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701441641] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:34:37,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:34:37,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 06:34:37,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049116590] [2023-04-01 06:34:37,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:34:37,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:34:37,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:34:37,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:34:37,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:34:37,365 INFO L87 Difference]: Start difference. First operand 457 states and 669 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:34:37,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:34:37,487 INFO L93 Difference]: Finished difference Result 1132 states and 1685 transitions. [2023-04-01 06:34:37,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 06:34:37,488 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 93 [2023-04-01 06:34:37,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:34:37,490 INFO L225 Difference]: With dead ends: 1132 [2023-04-01 06:34:37,490 INFO L226 Difference]: Without dead ends: 735 [2023-04-01 06:34:37,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:34:37,492 INFO L413 NwaCegarLoop]: 390 mSDtfsCounter, 291 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 671 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 06:34:37,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [291 Valid, 671 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 06:34:37,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 735 states. [2023-04-01 06:34:37,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 735 to 733. [2023-04-01 06:34:37,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 733 states, 729 states have (on average 1.477366255144033) internal successors, (1077), 729 states have internal predecessors, (1077), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:34:37,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 733 states to 733 states and 1080 transitions. [2023-04-01 06:34:37,529 INFO L78 Accepts]: Start accepts. Automaton has 733 states and 1080 transitions. Word has length 93 [2023-04-01 06:34:37,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:34:37,529 INFO L495 AbstractCegarLoop]: Abstraction has 733 states and 1080 transitions. [2023-04-01 06:34:37,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:34:37,530 INFO L276 IsEmpty]: Start isEmpty. Operand 733 states and 1080 transitions. [2023-04-01 06:34:37,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2023-04-01 06:34:37,531 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:34:37,531 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] [2023-04-01 06:34:37,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 06:34:37,531 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:34:37,532 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:34:37,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1761421253, now seen corresponding path program 1 times [2023-04-01 06:34:37,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:34:37,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801694168] [2023-04-01 06:34:37,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:34:37,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:34:37,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:34:37,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:34:37,664 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:34:37,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801694168] [2023-04-01 06:34:37,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801694168] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:34:37,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:34:37,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 06:34:37,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264121109] [2023-04-01 06:34:37,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:34:37,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:34:37,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:34:37,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:34:37,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:34:37,666 INFO L87 Difference]: Start difference. First operand 733 states and 1080 transitions. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:34:37,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:34:37,794 INFO L93 Difference]: Finished difference Result 1851 states and 2752 transitions. [2023-04-01 06:34:37,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 06:34:37,795 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 99 [2023-04-01 06:34:37,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:34:37,800 INFO L225 Difference]: With dead ends: 1851 [2023-04-01 06:34:37,800 INFO L226 Difference]: Without dead ends: 1191 [2023-04-01 06:34:37,802 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:34:37,810 INFO L413 NwaCegarLoop]: 462 mSDtfsCounter, 284 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 728 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 06:34:37,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [284 Valid, 728 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 06:34:37,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1191 states. [2023-04-01 06:34:37,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1191 to 1189. [2023-04-01 06:34:37,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1189 states, 1185 states have (on average 1.4751054852320675) internal successors, (1748), 1185 states have internal predecessors, (1748), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:34:37,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1189 states to 1189 states and 1751 transitions. [2023-04-01 06:34:37,919 INFO L78 Accepts]: Start accepts. Automaton has 1189 states and 1751 transitions. Word has length 99 [2023-04-01 06:34:37,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:34:37,920 INFO L495 AbstractCegarLoop]: Abstraction has 1189 states and 1751 transitions. [2023-04-01 06:34:37,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:34:37,921 INFO L276 IsEmpty]: Start isEmpty. Operand 1189 states and 1751 transitions. [2023-04-01 06:34:37,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2023-04-01 06:34:37,926 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:34:37,927 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:34:37,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 06:34:37,927 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:34:37,927 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:34:37,927 INFO L85 PathProgramCache]: Analyzing trace with hash 1029130805, now seen corresponding path program 1 times [2023-04-01 06:34:37,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:34:37,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339199127] [2023-04-01 06:34:37,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:34:37,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:34:37,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:34:38,031 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 06:34:38,031 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:34:38,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339199127] [2023-04-01 06:34:38,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339199127] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:34:38,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:34:38,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 06:34:38,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223663215] [2023-04-01 06:34:38,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:34:38,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:34:38,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:34:38,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:34:38,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:34:38,036 INFO L87 Difference]: Start difference. First operand 1189 states and 1751 transitions. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:34:38,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:34:38,280 INFO L93 Difference]: Finished difference Result 3014 states and 4451 transitions. [2023-04-01 06:34:38,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 06:34:38,281 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 105 [2023-04-01 06:34:38,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:34:38,287 INFO L225 Difference]: With dead ends: 3014 [2023-04-01 06:34:38,287 INFO L226 Difference]: Without dead ends: 1911 [2023-04-01 06:34:38,289 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:34:38,292 INFO L413 NwaCegarLoop]: 390 mSDtfsCounter, 279 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 641 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 06:34:38,293 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [279 Valid, 641 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 06:34:38,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1911 states. [2023-04-01 06:34:38,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1911 to 1909. [2023-04-01 06:34:38,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1909 states, 1905 states have (on average 1.462992125984252) internal successors, (2787), 1905 states have internal predecessors, (2787), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:34:38,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1909 states to 1909 states and 2790 transitions. [2023-04-01 06:34:38,464 INFO L78 Accepts]: Start accepts. Automaton has 1909 states and 2790 transitions. Word has length 105 [2023-04-01 06:34:38,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:34:38,464 INFO L495 AbstractCegarLoop]: Abstraction has 1909 states and 2790 transitions. [2023-04-01 06:34:38,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:34:38,464 INFO L276 IsEmpty]: Start isEmpty. Operand 1909 states and 2790 transitions. [2023-04-01 06:34:38,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2023-04-01 06:34:38,467 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:34:38,467 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] [2023-04-01 06:34:38,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 06:34:38,467 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:34:38,468 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:34:38,468 INFO L85 PathProgramCache]: Analyzing trace with hash -469012728, now seen corresponding path program 1 times [2023-04-01 06:34:38,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:34:38,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105881958] [2023-04-01 06:34:38,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:34:38,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:34:38,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:34:38,556 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 06:34:38,557 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:34:38,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105881958] [2023-04-01 06:34:38,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105881958] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:34:38,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:34:38,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 06:34:38,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886703594] [2023-04-01 06:34:38,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:34:38,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:34:38,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:34:38,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:34:38,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:34:38,558 INFO L87 Difference]: Start difference. First operand 1909 states and 2790 transitions. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:34:38,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:34:38,867 INFO L93 Difference]: Finished difference Result 4777 states and 6958 transitions. [2023-04-01 06:34:38,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 06:34:38,868 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 111 [2023-04-01 06:34:38,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:34:38,876 INFO L225 Difference]: With dead ends: 4777 [2023-04-01 06:34:38,877 INFO L226 Difference]: Without dead ends: 2967 [2023-04-01 06:34:38,881 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:34:38,881 INFO L413 NwaCegarLoop]: 390 mSDtfsCounter, 273 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 626 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 06:34:38,882 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [273 Valid, 626 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 06:34:38,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2967 states. [2023-04-01 06:34:39,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2967 to 2965. [2023-04-01 06:34:39,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2965 states, 2961 states have (on average 1.4380276933468423) internal successors, (4258), 2961 states have internal predecessors, (4258), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:34:39,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2965 states to 2965 states and 4261 transitions. [2023-04-01 06:34:39,132 INFO L78 Accepts]: Start accepts. Automaton has 2965 states and 4261 transitions. Word has length 111 [2023-04-01 06:34:39,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:34:39,132 INFO L495 AbstractCegarLoop]: Abstraction has 2965 states and 4261 transitions. [2023-04-01 06:34:39,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:34:39,132 INFO L276 IsEmpty]: Start isEmpty. Operand 2965 states and 4261 transitions. [2023-04-01 06:34:39,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2023-04-01 06:34:39,136 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:34:39,137 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] [2023-04-01 06:34:39,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-01 06:34:39,138 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:34:39,138 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:34:39,138 INFO L85 PathProgramCache]: Analyzing trace with hash -1863714167, now seen corresponding path program 1 times [2023-04-01 06:34:39,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:34:39,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168350121] [2023-04-01 06:34:39,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:34:39,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:34:39,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:34:39,381 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 06:34:39,381 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:34:39,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168350121] [2023-04-01 06:34:39,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168350121] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:34:39,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:34:39,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-01 06:34:39,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004526794] [2023-04-01 06:34:39,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:34:39,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 06:34:39,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:34:39,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 06:34:39,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-04-01 06:34:39,383 INFO L87 Difference]: Start difference. First operand 2965 states and 4261 transitions. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:34:41,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:34:41,156 INFO L93 Difference]: Finished difference Result 14928 states and 21299 transitions. [2023-04-01 06:34:41,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 06:34:41,156 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 117 [2023-04-01 06:34:41,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:34:41,187 INFO L225 Difference]: With dead ends: 14928 [2023-04-01 06:34:41,187 INFO L226 Difference]: Without dead ends: 12056 [2023-04-01 06:34:41,192 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-04-01 06:34:41,193 INFO L413 NwaCegarLoop]: 778 mSDtfsCounter, 2043 mSDsluCounter, 1179 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2043 SdHoareTripleChecker+Valid, 1957 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 06:34:41,193 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2043 Valid, 1957 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 06:34:41,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12056 states. [2023-04-01 06:34:42,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12056 to 12048. [2023-04-01 06:34:42,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12048 states, 12044 states have (on average 1.4197110594486881) internal successors, (17099), 12044 states have internal predecessors, (17099), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:34:42,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12048 states to 12048 states and 17102 transitions. [2023-04-01 06:34:42,499 INFO L78 Accepts]: Start accepts. Automaton has 12048 states and 17102 transitions. Word has length 117 [2023-04-01 06:34:42,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:34:42,499 INFO L495 AbstractCegarLoop]: Abstraction has 12048 states and 17102 transitions. [2023-04-01 06:34:42,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:34:42,499 INFO L276 IsEmpty]: Start isEmpty. Operand 12048 states and 17102 transitions. [2023-04-01 06:34:42,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2023-04-01 06:34:42,517 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:34:42,517 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] [2023-04-01 06:34:42,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-01 06:34:42,518 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:34:42,518 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:34:42,518 INFO L85 PathProgramCache]: Analyzing trace with hash -156832073, now seen corresponding path program 1 times [2023-04-01 06:34:42,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:34:42,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463929389] [2023-04-01 06:34:42,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:34:42,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:34:42,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:34:42,652 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 06:34:42,652 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:34:42,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463929389] [2023-04-01 06:34:42,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463929389] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:34:42,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:34:42,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 06:34:42,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944902749] [2023-04-01 06:34:42,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:34:42,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 06:34:42,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:34:42,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 06:34:42,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 06:34:42,654 INFO L87 Difference]: Start difference. First operand 12048 states and 17102 transitions. Second operand has 5 states, 5 states have (on average 23.6) internal successors, (118), 4 states have internal predecessors, (118), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:34:45,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:34:45,041 INFO L93 Difference]: Finished difference Result 29252 states and 41698 transitions. [2023-04-01 06:34:45,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 06:34:45,041 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 23.6) internal successors, (118), 4 states have internal predecessors, (118), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 121 [2023-04-01 06:34:45,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:34:45,079 INFO L225 Difference]: With dead ends: 29252 [2023-04-01 06:34:45,079 INFO L226 Difference]: Without dead ends: 17266 [2023-04-01 06:34:45,096 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-01 06:34:45,097 INFO L413 NwaCegarLoop]: 337 mSDtfsCounter, 1154 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 447 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1154 SdHoareTripleChecker+Valid, 478 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 06:34:45,097 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1154 Valid, 478 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 447 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 06:34:45,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17266 states. [2023-04-01 06:34:47,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17266 to 17264. [2023-04-01 06:34:47,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17264 states, 17260 states have (on average 1.413209733487833) internal successors, (24392), 17260 states have internal predecessors, (24392), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:34:47,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17264 states to 17264 states and 24395 transitions. [2023-04-01 06:34:47,600 INFO L78 Accepts]: Start accepts. Automaton has 17264 states and 24395 transitions. Word has length 121 [2023-04-01 06:34:47,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:34:47,600 INFO L495 AbstractCegarLoop]: Abstraction has 17264 states and 24395 transitions. [2023-04-01 06:34:47,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.6) internal successors, (118), 4 states have internal predecessors, (118), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:34:47,601 INFO L276 IsEmpty]: Start isEmpty. Operand 17264 states and 24395 transitions. [2023-04-01 06:34:47,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2023-04-01 06:34:47,627 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:34:47,627 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:34:47,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-01 06:34:47,627 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:34:47,628 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:34:47,628 INFO L85 PathProgramCache]: Analyzing trace with hash -2092500494, now seen corresponding path program 1 times [2023-04-01 06:34:47,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:34:47,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107494602] [2023-04-01 06:34:47,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:34:47,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:34:47,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:34:47,933 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 06:34:47,933 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:34:47,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107494602] [2023-04-01 06:34:47,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107494602] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:34:47,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:34:47,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-01 06:34:47,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128527960] [2023-04-01 06:34:47,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:34:47,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 06:34:47,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:34:47,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 06:34:47,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-04-01 06:34:47,935 INFO L87 Difference]: Start difference. First operand 17264 states and 24395 transitions. Second operand has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 6 states have internal predecessors, (118), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:34:54,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:34:54,548 INFO L93 Difference]: Finished difference Result 66710 states and 94382 transitions. [2023-04-01 06:34:54,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 06:34:54,548 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 6 states have internal predecessors, (118), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 121 [2023-04-01 06:34:54,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:34:54,658 INFO L225 Difference]: With dead ends: 66710 [2023-04-01 06:34:54,658 INFO L226 Difference]: Without dead ends: 49521 [2023-04-01 06:34:54,692 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2023-04-01 06:34:54,693 INFO L413 NwaCegarLoop]: 213 mSDtfsCounter, 3421 mSDsluCounter, 634 mSDsCounter, 0 mSdLazyCounter, 801 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3421 SdHoareTripleChecker+Valid, 847 SdHoareTripleChecker+Invalid, 854 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 801 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-01 06:34:54,693 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3421 Valid, 847 Invalid, 854 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 801 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-01 06:34:54,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49521 states. [2023-04-01 06:34:58,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49521 to 27104. [2023-04-01 06:34:58,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27104 states, 27100 states have (on average 1.3950553505535055) internal successors, (37806), 27100 states have internal predecessors, (37806), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:34:58,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27104 states to 27104 states and 37809 transitions. [2023-04-01 06:34:58,730 INFO L78 Accepts]: Start accepts. Automaton has 27104 states and 37809 transitions. Word has length 121 [2023-04-01 06:34:58,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:34:58,731 INFO L495 AbstractCegarLoop]: Abstraction has 27104 states and 37809 transitions. [2023-04-01 06:34:58,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 6 states have internal predecessors, (118), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:34:58,731 INFO L276 IsEmpty]: Start isEmpty. Operand 27104 states and 37809 transitions. [2023-04-01 06:34:58,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2023-04-01 06:34:58,764 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:34:58,764 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] [2023-04-01 06:34:58,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-01 06:34:58,765 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:34:58,765 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:34:58,765 INFO L85 PathProgramCache]: Analyzing trace with hash 1632050221, now seen corresponding path program 1 times [2023-04-01 06:34:58,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:34:58,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61525615] [2023-04-01 06:34:58,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:34:58,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:34:58,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:35:01,236 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 06:35:01,236 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:35:01,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61525615] [2023-04-01 06:35:01,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61525615] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:35:01,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:35:01,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2023-04-01 06:35:01,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901353751] [2023-04-01 06:35:01,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:35:01,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-04-01 06:35:01,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:35:01,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-04-01 06:35:01,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2023-04-01 06:35:01,237 INFO L87 Difference]: Start difference. First operand 27104 states and 37809 transitions. Second operand has 25 states, 25 states have (on average 4.72) internal successors, (118), 25 states have internal predecessors, (118), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:35:23,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:35:23,506 INFO L93 Difference]: Finished difference Result 112021 states and 155796 transitions. [2023-04-01 06:35:23,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-04-01 06:35:23,507 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.72) internal successors, (118), 25 states have internal predecessors, (118), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 121 [2023-04-01 06:35:23,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:35:23,672 INFO L225 Difference]: With dead ends: 112021 [2023-04-01 06:35:23,673 INFO L226 Difference]: Without dead ends: 92693 [2023-04-01 06:35:23,721 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 904 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=765, Invalid=2895, Unknown=0, NotChecked=0, Total=3660 [2023-04-01 06:35:23,722 INFO L413 NwaCegarLoop]: 684 mSDtfsCounter, 10135 mSDsluCounter, 11066 mSDsCounter, 0 mSdLazyCounter, 9269 mSolverCounterSat, 348 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10135 SdHoareTripleChecker+Valid, 11750 SdHoareTripleChecker+Invalid, 9617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 348 IncrementalHoareTripleChecker+Valid, 9269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2023-04-01 06:35:23,722 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10135 Valid, 11750 Invalid, 9617 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [348 Valid, 9269 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2023-04-01 06:35:23,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92693 states. [2023-04-01 06:35:33,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92693 to 46388. [2023-04-01 06:35:33,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46388 states, 46384 states have (on average 1.3725206967919972) internal successors, (63663), 46384 states have internal predecessors, (63663), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:35:33,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46388 states to 46388 states and 63666 transitions. [2023-04-01 06:35:33,469 INFO L78 Accepts]: Start accepts. Automaton has 46388 states and 63666 transitions. Word has length 121 [2023-04-01 06:35:33,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:35:33,469 INFO L495 AbstractCegarLoop]: Abstraction has 46388 states and 63666 transitions. [2023-04-01 06:35:33,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.72) internal successors, (118), 25 states have internal predecessors, (118), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:35:33,469 INFO L276 IsEmpty]: Start isEmpty. Operand 46388 states and 63666 transitions. [2023-04-01 06:35:33,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2023-04-01 06:35:33,525 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:35:33,525 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] [2023-04-01 06:35:33,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-01 06:35:33,525 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:35:33,525 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:35:33,525 INFO L85 PathProgramCache]: Analyzing trace with hash -1159580691, now seen corresponding path program 1 times [2023-04-01 06:35:33,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:35:33,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338201556] [2023-04-01 06:35:33,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:35:33,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:35:33,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:35:33,593 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 06:35:33,593 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:35:33,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338201556] [2023-04-01 06:35:33,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338201556] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:35:33,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:35:33,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 06:35:33,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947514174] [2023-04-01 06:35:33,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:35:33,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:35:33,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:35:33,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:35:33,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:35:33,595 INFO L87 Difference]: Start difference. First operand 46388 states and 63666 transitions. Second operand has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)