/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_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-03 03:28:15,101 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-03 03:28:15,103 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-03 03:28:15,129 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-03 03:28:15,129 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-03 03:28:15,130 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-03 03:28:15,131 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-03 03:28:15,140 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-03 03:28:15,143 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-03 03:28:15,148 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-03 03:28:15,149 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-03 03:28:15,150 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-03 03:28:15,150 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-03 03:28:15,151 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-03 03:28:15,151 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-03 03:28:15,152 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-03 03:28:15,153 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-03 03:28:15,153 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-03 03:28:15,155 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-03 03:28:15,156 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-03 03:28:15,157 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-03 03:28:15,162 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-03 03:28:15,163 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-03 03:28:15,163 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-03 03:28:15,166 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-03 03:28:15,166 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-03 03:28:15,166 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-03 03:28:15,167 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-03 03:28:15,168 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-03 03:28:15,168 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-03 03:28:15,169 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-03 03:28:15,169 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-03 03:28:15,170 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-03 03:28:15,170 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-03 03:28:15,171 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-03 03:28:15,171 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-03 03:28:15,172 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-03 03:28:15,172 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-03 03:28:15,172 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-03 03:28:15,173 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-03 03:28:15,173 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-03 03:28:15,174 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-03 03:28:15,199 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-03 03:28:15,199 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-03 03:28:15,200 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-03 03:28:15,200 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-03 03:28:15,201 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-03 03:28:15,201 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-03 03:28:15,201 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-03 03:28:15,201 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-03 03:28:15,201 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-03 03:28:15,201 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-03 03:28:15,202 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-03 03:28:15,202 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-03 03:28:15,202 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-03 03:28:15,202 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-03 03:28:15,203 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-03 03:28:15,203 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-03 03:28:15,203 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-03 03:28:15,203 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-03 03:28:15,203 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-03 03:28:15,203 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-03 03:28:15,204 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-03 03:28:15,204 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-03 03:28:15,204 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-03 03:28:15,204 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-03 03:28:15,204 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-03 03:28:15,204 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-03 03:28:15,205 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-03 03:28:15,205 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-03 03:28:15,205 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-03 03:28:15,205 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-03 03:28:15,205 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-03 03:28:15,205 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-03 03:28:15,205 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 03:28:15,206 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-03 03:28:15,206 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-03 03:28:15,206 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-03 03:28:15,206 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-03 03:28:15,206 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-03 03:28:15,206 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-03 03:28:15,206 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-03 03:28:15,206 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-03 03:28:15,206 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-03 03:28:15,425 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-03 03:28:15,449 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-03 03:28:15,451 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-03 03:28:15,452 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-03 03:28:15,453 INFO L275 PluginConnector]: CDTParser initialized [2023-04-03 03:28:15,454 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2023-04-03 03:28:16,619 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-03 03:28:16,950 INFO L351 CDTParser]: Found 1 translation units. [2023-04-03 03:28:16,951 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2023-04-03 03:28:16,979 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c621a653f/26c0e20c85e84df1a1527338fc4dbbd5/FLAG438f243df [2023-04-03 03:28:16,991 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c621a653f/26c0e20c85e84df1a1527338fc4dbbd5 [2023-04-03 03:28:16,993 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-03 03:28:16,995 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-03 03:28:16,997 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-03 03:28:16,997 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-03 03:28:16,999 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-03 03:28:17,000 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 03:28:16" (1/1) ... [2023-04-03 03:28:17,001 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13d98227 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 03:28:17, skipping insertion in model container [2023-04-03 03:28:17,001 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 03:28:16" (1/1) ... [2023-04-03 03:28:17,007 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-03 03:28:17,104 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-03 03:28:17,644 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_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c[35225,35238] [2023-04-03 03:28:17,832 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 03:28:17,847 INFO L203 MainTranslator]: Completed pre-run [2023-04-03 03:28:18,073 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_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c[35225,35238] [2023-04-03 03:28:18,189 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 03:28:18,210 INFO L208 MainTranslator]: Completed translation [2023-04-03 03:28:18,212 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 03:28:18 WrapperNode [2023-04-03 03:28:18,213 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-03 03:28:18,214 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-03 03:28:18,214 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-03 03:28:18,214 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-03 03:28:18,225 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 03:28:18" (1/1) ... [2023-04-03 03:28:18,225 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 03:28:18" (1/1) ... [2023-04-03 03:28:18,259 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 03:28:18" (1/1) ... [2023-04-03 03:28:18,260 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 03:28:18" (1/1) ... [2023-04-03 03:28:18,317 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 03:28:18" (1/1) ... [2023-04-03 03:28:18,354 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 03:28:18" (1/1) ... [2023-04-03 03:28:18,388 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 03:28:18" (1/1) ... [2023-04-03 03:28:18,394 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 03:28:18" (1/1) ... [2023-04-03 03:28:18,408 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-03 03:28:18,409 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-03 03:28:18,409 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-03 03:28:18,409 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-03 03:28:18,410 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 03:28:18" (1/1) ... [2023-04-03 03:28:18,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 03:28:18,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 03:28:18,443 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-03 03:28:18,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-03 03:28:18,482 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-03 03:28:18,482 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-03 03:28:18,482 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-03 03:28:18,482 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-03 03:28:18,482 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-03 03:28:18,483 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-03 03:28:18,483 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-03 03:28:18,483 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-03 03:28:18,483 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-03 03:28:18,483 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-03 03:28:18,483 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-03 03:28:18,483 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-03 03:28:18,483 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-03 03:28:18,483 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-03 03:28:18,484 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-03 03:28:18,484 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-03 03:28:18,484 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-03 03:28:18,484 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-03 03:28:18,484 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2023-04-03 03:28:18,484 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-03 03:28:18,485 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-03 03:28:18,485 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-03 03:28:18,485 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-03 03:28:18,485 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-03 03:28:18,485 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-03 03:28:18,485 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-03 03:28:18,485 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-03 03:28:18,485 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-03 03:28:18,670 INFO L236 CfgBuilder]: Building ICFG [2023-04-03 03:28:18,672 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-03 03:28:20,422 INFO L277 CfgBuilder]: Performing block encoding [2023-04-03 03:28:21,086 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-03 03:28:21,087 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-03 03:28:21,091 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 03:28:21 BoogieIcfgContainer [2023-04-03 03:28:21,091 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-03 03:28:21,094 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-03 03:28:21,094 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-03 03:28:21,097 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-03 03:28:21,097 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.04 03:28:16" (1/3) ... [2023-04-03 03:28:21,097 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6af67531 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 03:28:21, skipping insertion in model container [2023-04-03 03:28:21,098 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 03:28:18" (2/3) ... [2023-04-03 03:28:21,098 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6af67531 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 03:28:21, skipping insertion in model container [2023-04-03 03:28:21,098 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 03:28:21" (3/3) ... [2023-04-03 03:28:21,099 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2023-04-03 03:28:21,116 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-03 03:28:21,116 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-03 03:28:21,186 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-03 03:28:21,192 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;@54384c1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-03 03:28:21,193 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-03 03:28:21,200 INFO L276 IsEmpty]: Start isEmpty. Operand has 645 states, 630 states have (on average 1.7285714285714286) internal successors, (1089), 640 states have internal predecessors, (1089), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-03 03:28:21,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2023-04-03 03:28:21,225 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:28:21,226 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 03:28:21,226 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:28:21,231 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:28:21,231 INFO L85 PathProgramCache]: Analyzing trace with hash 69923396, now seen corresponding path program 1 times [2023-04-03 03:28:21,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:28:21,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210061493] [2023-04-03 03:28:21,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:28:21,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:28:22,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:28:23,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 03:28:23,097 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:28:23,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210061493] [2023-04-03 03:28:23,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210061493] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:28:23,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:28:23,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-03 03:28:23,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002497993] [2023-04-03 03:28:23,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:28:23,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-03 03:28:23,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:28:23,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-03 03:28:23,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-03 03:28:23,146 INFO L87 Difference]: Start difference. First operand has 645 states, 630 states have (on average 1.7285714285714286) internal successors, (1089), 640 states have internal predecessors, (1089), 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 66.0) internal successors, (264), 4 states have internal predecessors, (264), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:28:23,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:28:23,676 INFO L93 Difference]: Finished difference Result 1891 states and 3212 transitions. [2023-04-03 03:28:23,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 03:28:23,678 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 66.0) internal successors, (264), 4 states have internal predecessors, (264), 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 267 [2023-04-03 03:28:23,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:28:23,694 INFO L225 Difference]: With dead ends: 1891 [2023-04-03 03:28:23,694 INFO L226 Difference]: Without dead ends: 1233 [2023-04-03 03:28:23,700 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 [2023-04-03 03:28:23,703 INFO L413 NwaCegarLoop]: 1559 mSDtfsCounter, 2531 mSDsluCounter, 989 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2531 SdHoareTripleChecker+Valid, 2548 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-03 03:28:23,703 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2531 Valid, 2548 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-03 03:28:23,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1233 states. [2023-04-03 03:28:23,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1233 to 1231. [2023-04-03 03:28:23,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1231 states, 1227 states have (on average 1.4360228198859006) internal successors, (1762), 1227 states have internal predecessors, (1762), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:28:23,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1231 states to 1231 states and 1765 transitions. [2023-04-03 03:28:23,824 INFO L78 Accepts]: Start accepts. Automaton has 1231 states and 1765 transitions. Word has length 267 [2023-04-03 03:28:23,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:28:23,826 INFO L495 AbstractCegarLoop]: Abstraction has 1231 states and 1765 transitions. [2023-04-03 03:28:23,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 66.0) internal successors, (264), 4 states have internal predecessors, (264), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:28:23,826 INFO L276 IsEmpty]: Start isEmpty. Operand 1231 states and 1765 transitions. [2023-04-03 03:28:23,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2023-04-03 03:28:23,835 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:28:23,835 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 03:28:23,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-03 03:28:23,836 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:28:23,836 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:28:23,837 INFO L85 PathProgramCache]: Analyzing trace with hash 1608591127, now seen corresponding path program 1 times [2023-04-03 03:28:23,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:28:23,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511476979] [2023-04-03 03:28:23,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:28:23,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:28:23,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:28:24,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 03:28:24,137 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:28:24,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511476979] [2023-04-03 03:28:24,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511476979] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:28:24,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:28:24,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 03:28:24,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746488454] [2023-04-03 03:28:24,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:28:24,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 03:28:24,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:28:24,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 03:28:24,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 03:28:24,142 INFO L87 Difference]: Start difference. First operand 1231 states and 1765 transitions. Second operand has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:28:24,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:28:24,455 INFO L93 Difference]: Finished difference Result 3516 states and 5021 transitions. [2023-04-03 03:28:24,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 03:28:24,457 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 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 269 [2023-04-03 03:28:24,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:28:24,468 INFO L225 Difference]: With dead ends: 3516 [2023-04-03 03:28:24,469 INFO L226 Difference]: Without dead ends: 2410 [2023-04-03 03:28:24,472 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 03:28:24,473 INFO L413 NwaCegarLoop]: 1675 mSDtfsCounter, 780 mSDsluCounter, 822 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 780 SdHoareTripleChecker+Valid, 2497 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-03 03:28:24,474 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [780 Valid, 2497 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-03 03:28:24,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2410 states. [2023-04-03 03:28:24,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2410 to 2408. [2023-04-03 03:28:24,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2408 states, 2404 states have (on average 1.4292845257903495) internal successors, (3436), 2404 states have internal predecessors, (3436), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:28:24,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2408 states to 2408 states and 3439 transitions. [2023-04-03 03:28:24,665 INFO L78 Accepts]: Start accepts. Automaton has 2408 states and 3439 transitions. Word has length 269 [2023-04-03 03:28:24,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:28:24,666 INFO L495 AbstractCegarLoop]: Abstraction has 2408 states and 3439 transitions. [2023-04-03 03:28:24,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:28:24,666 INFO L276 IsEmpty]: Start isEmpty. Operand 2408 states and 3439 transitions. [2023-04-03 03:28:24,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2023-04-03 03:28:24,673 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:28:24,673 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 03:28:24,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-03 03:28:24,673 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:28:24,674 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:28:24,674 INFO L85 PathProgramCache]: Analyzing trace with hash 446768398, now seen corresponding path program 1 times [2023-04-03 03:28:24,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:28:24,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249754003] [2023-04-03 03:28:24,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:28:24,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:28:24,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:28:24,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 03:28:24,876 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:28:24,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249754003] [2023-04-03 03:28:24,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249754003] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:28:24,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:28:24,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 03:28:24,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322067888] [2023-04-03 03:28:24,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:28:24,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 03:28:24,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:28:24,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 03:28:24,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 03:28:24,880 INFO L87 Difference]: Start difference. First operand 2408 states and 3439 transitions. Second operand has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:28:25,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:28:25,469 INFO L93 Difference]: Finished difference Result 7064 states and 10076 transitions. [2023-04-03 03:28:25,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 03:28:25,470 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 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 269 [2023-04-03 03:28:25,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:28:25,488 INFO L225 Difference]: With dead ends: 7064 [2023-04-03 03:28:25,488 INFO L226 Difference]: Without dead ends: 4792 [2023-04-03 03:28:25,496 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 03:28:25,498 INFO L413 NwaCegarLoop]: 1718 mSDtfsCounter, 897 mSDsluCounter, 858 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 897 SdHoareTripleChecker+Valid, 2576 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-03 03:28:25,499 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [897 Valid, 2576 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-03 03:28:25,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4792 states. [2023-04-03 03:28:25,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4792 to 2411. [2023-04-03 03:28:25,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2411 states, 2407 states have (on average 1.428749480681346) internal successors, (3439), 2407 states have internal predecessors, (3439), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:28:25,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2411 states to 2411 states and 3442 transitions. [2023-04-03 03:28:25,742 INFO L78 Accepts]: Start accepts. Automaton has 2411 states and 3442 transitions. Word has length 269 [2023-04-03 03:28:25,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:28:25,743 INFO L495 AbstractCegarLoop]: Abstraction has 2411 states and 3442 transitions. [2023-04-03 03:28:25,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:28:25,743 INFO L276 IsEmpty]: Start isEmpty. Operand 2411 states and 3442 transitions. [2023-04-03 03:28:25,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2023-04-03 03:28:25,749 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:28:25,750 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 03:28:25,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-03 03:28:25,751 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:28:25,752 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:28:25,752 INFO L85 PathProgramCache]: Analyzing trace with hash -208316402, now seen corresponding path program 1 times [2023-04-03 03:28:25,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:28:25,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816673200] [2023-04-03 03:28:25,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:28:25,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:28:26,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:28:26,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 03:28:26,676 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:28:26,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816673200] [2023-04-03 03:28:26,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816673200] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:28:26,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:28:26,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 03:28:26,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707005820] [2023-04-03 03:28:26,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:28:26,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 03:28:26,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:28:26,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 03:28:26,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-03 03:28:26,678 INFO L87 Difference]: Start difference. First operand 2411 states and 3442 transitions. Second operand has 5 states, 5 states have (on average 53.4) internal successors, (267), 5 states have internal predecessors, (267), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:28:27,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:28:27,303 INFO L93 Difference]: Finished difference Result 6991 states and 9957 transitions. [2023-04-03 03:28:27,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-03 03:28:27,305 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 53.4) internal successors, (267), 5 states have internal predecessors, (267), 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 270 [2023-04-03 03:28:27,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:28:27,320 INFO L225 Difference]: With dead ends: 6991 [2023-04-03 03:28:27,321 INFO L226 Difference]: Without dead ends: 4599 [2023-04-03 03:28:27,326 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-03 03:28:27,326 INFO L413 NwaCegarLoop]: 1291 mSDtfsCounter, 1745 mSDsluCounter, 1627 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1745 SdHoareTripleChecker+Valid, 2918 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-03 03:28:27,327 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1745 Valid, 2918 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-03 03:28:27,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4599 states. [2023-04-03 03:28:27,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4599 to 4597. [2023-04-03 03:28:27,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4597 states, 4593 states have (on average 1.41563248421511) internal successors, (6502), 4593 states have internal predecessors, (6502), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:28:27,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4597 states to 4597 states and 6505 transitions. [2023-04-03 03:28:27,776 INFO L78 Accepts]: Start accepts. Automaton has 4597 states and 6505 transitions. Word has length 270 [2023-04-03 03:28:27,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:28:27,777 INFO L495 AbstractCegarLoop]: Abstraction has 4597 states and 6505 transitions. [2023-04-03 03:28:27,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.4) internal successors, (267), 5 states have internal predecessors, (267), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:28:27,778 INFO L276 IsEmpty]: Start isEmpty. Operand 4597 states and 6505 transitions. [2023-04-03 03:28:27,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2023-04-03 03:28:27,788 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:28:27,788 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 03:28:27,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-03 03:28:27,788 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:28:27,789 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:28:27,789 INFO L85 PathProgramCache]: Analyzing trace with hash -1088429535, now seen corresponding path program 1 times [2023-04-03 03:28:27,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:28:27,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193751408] [2023-04-03 03:28:27,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:28:27,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:28:28,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:28:28,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 03:28:28,613 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:28:28,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193751408] [2023-04-03 03:28:28,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193751408] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:28:28,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:28:28,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-03 03:28:28,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682447734] [2023-04-03 03:28:28,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:28:28,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-03 03:28:28,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:28:28,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-03 03:28:28,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-03 03:28:28,618 INFO L87 Difference]: Start difference. First operand 4597 states and 6505 transitions. Second operand has 4 states, 4 states have (on average 67.0) internal successors, (268), 4 states have internal predecessors, (268), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:28:29,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:28:29,789 INFO L93 Difference]: Finished difference Result 13427 states and 18958 transitions. [2023-04-03 03:28:29,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-03 03:28:29,795 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 67.0) internal successors, (268), 4 states have internal predecessors, (268), 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 271 [2023-04-03 03:28:29,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:28:29,828 INFO L225 Difference]: With dead ends: 13427 [2023-04-03 03:28:29,828 INFO L226 Difference]: Without dead ends: 8972 [2023-04-03 03:28:29,838 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-03 03:28:29,840 INFO L413 NwaCegarLoop]: 1130 mSDtfsCounter, 2229 mSDsluCounter, 819 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2229 SdHoareTripleChecker+Valid, 1949 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-03 03:28:29,841 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2229 Valid, 1949 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-03 03:28:29,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8972 states. [2023-04-03 03:28:30,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8972 to 8970. [2023-04-03 03:28:30,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8970 states, 8966 states have (on average 1.4057550747267455) internal successors, (12604), 8966 states have internal predecessors, (12604), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:28:30,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8970 states to 8970 states and 12607 transitions. [2023-04-03 03:28:30,830 INFO L78 Accepts]: Start accepts. Automaton has 8970 states and 12607 transitions. Word has length 271 [2023-04-03 03:28:30,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:28:30,830 INFO L495 AbstractCegarLoop]: Abstraction has 8970 states and 12607 transitions. [2023-04-03 03:28:30,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 67.0) internal successors, (268), 4 states have internal predecessors, (268), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:28:30,830 INFO L276 IsEmpty]: Start isEmpty. Operand 8970 states and 12607 transitions. [2023-04-03 03:28:30,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2023-04-03 03:28:30,849 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:28:30,850 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 03:28:30,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-03 03:28:30,850 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:28:30,850 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:28:30,851 INFO L85 PathProgramCache]: Analyzing trace with hash -129889579, now seen corresponding path program 1 times [2023-04-03 03:28:30,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:28:30,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509531604] [2023-04-03 03:28:30,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:28:30,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:28:31,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:28:31,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 03:28:31,653 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:28:31,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509531604] [2023-04-03 03:28:31,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509531604] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:28:31,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:28:31,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-03 03:28:31,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796918136] [2023-04-03 03:28:31,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:28:31,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-03 03:28:31,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:28:31,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-03 03:28:31,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-03 03:28:31,656 INFO L87 Difference]: Start difference. First operand 8970 states and 12607 transitions. Second operand has 4 states, 4 states have (on average 67.5) internal successors, (270), 4 states have internal predecessors, (270), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:28:33,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:28:33,521 INFO L93 Difference]: Finished difference Result 26298 states and 36876 transitions. [2023-04-03 03:28:33,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-03 03:28:33,522 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 67.5) internal successors, (270), 4 states have internal predecessors, (270), 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 273 [2023-04-03 03:28:33,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:28:33,574 INFO L225 Difference]: With dead ends: 26298 [2023-04-03 03:28:33,574 INFO L226 Difference]: Without dead ends: 17474 [2023-04-03 03:28:33,597 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 [2023-04-03 03:28:33,598 INFO L413 NwaCegarLoop]: 1113 mSDtfsCounter, 2210 mSDsluCounter, 811 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2210 SdHoareTripleChecker+Valid, 1924 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-03 03:28:33,598 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2210 Valid, 1924 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-03 03:28:33,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17474 states. [2023-04-03 03:28:35,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17474 to 17472. [2023-04-03 03:28:35,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17472 states, 17468 states have (on average 1.3936913212731852) internal successors, (24345), 17468 states have internal predecessors, (24345), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:28:35,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17472 states to 17472 states and 24348 transitions. [2023-04-03 03:28:35,264 INFO L78 Accepts]: Start accepts. Automaton has 17472 states and 24348 transitions. Word has length 273 [2023-04-03 03:28:35,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:28:35,264 INFO L495 AbstractCegarLoop]: Abstraction has 17472 states and 24348 transitions. [2023-04-03 03:28:35,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 67.5) internal successors, (270), 4 states have internal predecessors, (270), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:28:35,265 INFO L276 IsEmpty]: Start isEmpty. Operand 17472 states and 24348 transitions. [2023-04-03 03:28:35,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2023-04-03 03:28:35,301 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:28:35,301 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 03:28:35,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-03 03:28:35,301 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:28:35,302 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:28:35,302 INFO L85 PathProgramCache]: Analyzing trace with hash 1672580703, now seen corresponding path program 1 times [2023-04-03 03:28:35,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:28:35,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115397619] [2023-04-03 03:28:35,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:28:35,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:28:35,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:28:35,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 03:28:35,539 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:28:35,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115397619] [2023-04-03 03:28:35,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115397619] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:28:35,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:28:35,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 03:28:35,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688376450] [2023-04-03 03:28:35,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:28:35,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 03:28:35,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:28:35,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 03:28:35,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 03:28:35,541 INFO L87 Difference]: Start difference. First operand 17472 states and 24348 transitions. Second operand has 3 states, 3 states have (on average 90.66666666666667) internal successors, (272), 3 states have internal predecessors, (272), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:28:38,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:28:38,523 INFO L93 Difference]: Finished difference Result 50075 states and 69429 transitions. [2023-04-03 03:28:38,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 03:28:38,524 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 90.66666666666667) internal successors, (272), 3 states have internal predecessors, (272), 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 275 [2023-04-03 03:28:38,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:28:38,610 INFO L225 Difference]: With dead ends: 50075 [2023-04-03 03:28:38,611 INFO L226 Difference]: Without dead ends: 34169 [2023-04-03 03:28:38,651 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 03:28:38,652 INFO L413 NwaCegarLoop]: 1654 mSDtfsCounter, 763 mSDsluCounter, 822 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 763 SdHoareTripleChecker+Valid, 2476 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-03 03:28:38,653 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [763 Valid, 2476 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-03 03:28:38,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34169 states. [2023-04-03 03:28:41,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34169 to 34167. [2023-04-03 03:28:41,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34167 states, 34163 states have (on average 1.3848900857653017) internal successors, (47312), 34163 states have internal predecessors, (47312), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:28:41,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34167 states to 34167 states and 47315 transitions. [2023-04-03 03:28:41,770 INFO L78 Accepts]: Start accepts. Automaton has 34167 states and 47315 transitions. Word has length 275 [2023-04-03 03:28:41,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:28:41,770 INFO L495 AbstractCegarLoop]: Abstraction has 34167 states and 47315 transitions. [2023-04-03 03:28:41,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 90.66666666666667) internal successors, (272), 3 states have internal predecessors, (272), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:28:41,771 INFO L276 IsEmpty]: Start isEmpty. Operand 34167 states and 47315 transitions. [2023-04-03 03:28:41,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2023-04-03 03:28:41,845 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:28:41,845 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 03:28:41,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-03 03:28:41,846 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:28:41,846 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:28:41,846 INFO L85 PathProgramCache]: Analyzing trace with hash 2103155419, now seen corresponding path program 1 times [2023-04-03 03:28:41,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:28:41,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459984322] [2023-04-03 03:28:41,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:28:41,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:28:41,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:28:42,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 03:28:42,113 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:28:42,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459984322] [2023-04-03 03:28:42,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459984322] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:28:42,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:28:42,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 03:28:42,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935247179] [2023-04-03 03:28:42,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:28:42,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 03:28:42,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:28:42,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 03:28:42,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 03:28:42,117 INFO L87 Difference]: Start difference. First operand 34167 states and 47315 transitions. Second operand has 3 states, 3 states have (on average 90.66666666666667) internal successors, (272), 3 states have internal predecessors, (272), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:28:47,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:28:47,331 INFO L93 Difference]: Finished difference Result 100558 states and 139055 transitions. [2023-04-03 03:28:47,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 03:28:47,332 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 90.66666666666667) internal successors, (272), 3 states have internal predecessors, (272), 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 275 [2023-04-03 03:28:47,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:28:47,514 INFO L225 Difference]: With dead ends: 100558 [2023-04-03 03:28:47,514 INFO L226 Difference]: Without dead ends: 68081 [2023-04-03 03:28:47,587 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 03:28:47,588 INFO L413 NwaCegarLoop]: 1697 mSDtfsCounter, 873 mSDsluCounter, 858 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 873 SdHoareTripleChecker+Valid, 2555 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-03 03:28:47,588 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [873 Valid, 2555 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-03 03:28:47,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68081 states. [2023-04-03 03:28:50,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68081 to 34200. [2023-04-03 03:28:50,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34200 states, 34196 states have (on average 1.3845186571528834) internal successors, (47345), 34196 states have internal predecessors, (47345), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:28:50,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34200 states to 34200 states and 47348 transitions. [2023-04-03 03:28:50,954 INFO L78 Accepts]: Start accepts. Automaton has 34200 states and 47348 transitions. Word has length 275 [2023-04-03 03:28:50,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:28:50,954 INFO L495 AbstractCegarLoop]: Abstraction has 34200 states and 47348 transitions. [2023-04-03 03:28:50,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 90.66666666666667) internal successors, (272), 3 states have internal predecessors, (272), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:28:50,954 INFO L276 IsEmpty]: Start isEmpty. Operand 34200 states and 47348 transitions. [2023-04-03 03:28:51,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2023-04-03 03:28:51,011 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:28:51,011 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 03:28:51,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-03 03:28:51,011 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:28:51,012 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:28:51,012 INFO L85 PathProgramCache]: Analyzing trace with hash 708723902, now seen corresponding path program 1 times [2023-04-03 03:28:51,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:28:51,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767837818] [2023-04-03 03:28:51,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:28:51,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:28:51,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:28:51,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 03:28:51,180 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:28:51,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767837818] [2023-04-03 03:28:51,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767837818] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:28:51,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:28:51,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 03:28:51,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772386844] [2023-04-03 03:28:51,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:28:51,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 03:28:51,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:28:51,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 03:28:51,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 03:28:51,183 INFO L87 Difference]: Start difference. First operand 34200 states and 47348 transitions. Second operand has 3 states, 3 states have (on average 91.0) internal successors, (273), 3 states have internal predecessors, (273), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:28:56,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:28:56,152 INFO L93 Difference]: Finished difference Result 70556 states and 99190 transitions. [2023-04-03 03:28:56,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 03:28:56,153 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 91.0) internal successors, (273), 3 states have internal predecessors, (273), 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 276 [2023-04-03 03:28:56,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:28:56,242 INFO L225 Difference]: With dead ends: 70556 [2023-04-03 03:28:56,242 INFO L226 Difference]: Without dead ends: 46554 [2023-04-03 03:28:56,291 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 03:28:56,292 INFO L413 NwaCegarLoop]: 1169 mSDtfsCounter, 503 mSDsluCounter, 643 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 503 SdHoareTripleChecker+Valid, 1812 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-03 03:28:56,293 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [503 Valid, 1812 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-03 03:28:56,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46554 states. [2023-04-03 03:29:00,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46554 to 39640. [2023-04-03 03:29:00,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39640 states, 39636 states have (on average 1.4011756988596227) internal successors, (55537), 39636 states have internal predecessors, (55537), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:29:00,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39640 states to 39640 states and 55540 transitions. [2023-04-03 03:29:00,270 INFO L78 Accepts]: Start accepts. Automaton has 39640 states and 55540 transitions. Word has length 276 [2023-04-03 03:29:00,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:29:00,271 INFO L495 AbstractCegarLoop]: Abstraction has 39640 states and 55540 transitions. [2023-04-03 03:29:00,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 91.0) internal successors, (273), 3 states have internal predecessors, (273), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:29:00,271 INFO L276 IsEmpty]: Start isEmpty. Operand 39640 states and 55540 transitions. [2023-04-03 03:29:00,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2023-04-03 03:29:00,315 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:29:00,315 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 03:29:00,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-03 03:29:00,315 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:29:00,315 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:29:00,316 INFO L85 PathProgramCache]: Analyzing trace with hash -630661435, now seen corresponding path program 1 times [2023-04-03 03:29:00,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:29:00,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114651082] [2023-04-03 03:29:00,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:29:00,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:29:00,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:29:01,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 03:29:01,050 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:29:01,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114651082] [2023-04-03 03:29:01,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114651082] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:29:01,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:29:01,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 03:29:01,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577979043] [2023-04-03 03:29:01,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:29:01,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 03:29:01,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:29:01,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 03:29:01,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-03 03:29:01,053 INFO L87 Difference]: Start difference. First operand 39640 states and 55540 transitions. Second operand has 5 states, 5 states have (on average 54.6) internal successors, (273), 5 states have internal predecessors, (273), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:29:08,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:29:08,216 INFO L93 Difference]: Finished difference Result 115435 states and 161443 transitions. [2023-04-03 03:29:08,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-03 03:29:08,217 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 54.6) internal successors, (273), 5 states have internal predecessors, (273), 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 276 [2023-04-03 03:29:08,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:29:08,364 INFO L225 Difference]: With dead ends: 115435 [2023-04-03 03:29:08,365 INFO L226 Difference]: Without dead ends: 75999 [2023-04-03 03:29:08,421 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-03 03:29:08,421 INFO L413 NwaCegarLoop]: 1419 mSDtfsCounter, 1718 mSDsluCounter, 1631 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1718 SdHoareTripleChecker+Valid, 3050 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-03 03:29:08,422 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1718 Valid, 3050 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-03 03:29:08,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75999 states. [2023-04-03 03:29:15,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75999 to 75997. [2023-04-03 03:29:15,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75997 states, 75993 states have (on average 1.3910754937954812) internal successors, (105712), 75993 states have internal predecessors, (105712), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:29:15,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75997 states to 75997 states and 105715 transitions. [2023-04-03 03:29:15,832 INFO L78 Accepts]: Start accepts. Automaton has 75997 states and 105715 transitions. Word has length 276 [2023-04-03 03:29:15,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:29:15,832 INFO L495 AbstractCegarLoop]: Abstraction has 75997 states and 105715 transitions. [2023-04-03 03:29:15,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 54.6) internal successors, (273), 5 states have internal predecessors, (273), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:29:15,832 INFO L276 IsEmpty]: Start isEmpty. Operand 75997 states and 105715 transitions. [2023-04-03 03:29:15,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2023-04-03 03:29:15,928 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:29:15,928 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 03:29:15,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-03 03:29:15,929 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:29:15,929 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:29:15,929 INFO L85 PathProgramCache]: Analyzing trace with hash -2039216179, now seen corresponding path program 1 times [2023-04-03 03:29:15,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:29:15,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533004564] [2023-04-03 03:29:15,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:29:15,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:29:16,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:29:16,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 03:29:16,767 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:29:16,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533004564] [2023-04-03 03:29:16,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533004564] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:29:16,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:29:16,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-03 03:29:16,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437337347] [2023-04-03 03:29:16,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:29:16,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-03 03:29:16,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:29:16,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-03 03:29:16,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-03 03:29:16,769 INFO L87 Difference]: Start difference. First operand 75997 states and 105715 transitions. Second operand has 4 states, 4 states have (on average 68.5) internal successors, (274), 4 states have internal predecessors, (274), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:29:32,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:29:32,546 INFO L93 Difference]: Finished difference Result 219887 states and 304931 transitions. [2023-04-03 03:29:32,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-03 03:29:32,546 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 68.5) internal successors, (274), 4 states have internal predecessors, (274), 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 277 [2023-04-03 03:29:32,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:29:32,820 INFO L225 Difference]: With dead ends: 219887 [2023-04-03 03:29:32,820 INFO L226 Difference]: Without dead ends: 146158 [2023-04-03 03:29:32,900 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-03 03:29:32,901 INFO L413 NwaCegarLoop]: 1417 mSDtfsCounter, 1901 mSDsluCounter, 821 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1901 SdHoareTripleChecker+Valid, 2238 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-03 03:29:32,902 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1901 Valid, 2238 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-03 03:29:33,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146158 states. [2023-04-03 03:29:48,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146158 to 146156. [2023-04-03 03:29:48,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146156 states, 146152 states have (on average 1.3798990092506431) internal successors, (201675), 146152 states have internal predecessors, (201675), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:29:49,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146156 states to 146156 states and 201678 transitions. [2023-04-03 03:29:49,182 INFO L78 Accepts]: Start accepts. Automaton has 146156 states and 201678 transitions. Word has length 277 [2023-04-03 03:29:49,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:29:49,182 INFO L495 AbstractCegarLoop]: Abstraction has 146156 states and 201678 transitions. [2023-04-03 03:29:49,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 68.5) internal successors, (274), 4 states have internal predecessors, (274), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:29:49,183 INFO L276 IsEmpty]: Start isEmpty. Operand 146156 states and 201678 transitions. [2023-04-03 03:29:49,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2023-04-03 03:29:49,648 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:29:49,648 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 03:29:49,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-04-03 03:29:49,649 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:29:49,649 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:29:49,649 INFO L85 PathProgramCache]: Analyzing trace with hash 1268015746, now seen corresponding path program 1 times [2023-04-03 03:29:49,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:29:49,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256477126] [2023-04-03 03:29:49,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:29:49,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:29:49,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:29:50,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 03:29:50,320 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:29:50,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256477126] [2023-04-03 03:29:50,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256477126] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:29:50,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:29:50,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-03 03:29:50,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665907094] [2023-04-03 03:29:50,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:29:50,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-03 03:29:50,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:29:50,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-03 03:29:50,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-03 03:29:50,322 INFO L87 Difference]: Start difference. First operand 146156 states and 201678 transitions. Second operand has 4 states, 4 states have (on average 69.0) internal successors, (276), 4 states have internal predecessors, (276), 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)