/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_floodmax.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 06:27:30,454 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 06:27:30,455 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 06:27:30,481 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 06:27:30,481 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 06:27:30,483 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 06:27:30,485 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 06:27:30,487 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 06:27:30,488 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 06:27:30,491 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 06:27:30,492 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 06:27:30,493 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 06:27:30,493 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 06:27:30,496 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 06:27:30,497 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 06:27:30,499 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 06:27:30,499 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 06:27:30,500 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 06:27:30,502 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 06:27:30,505 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 06:27:30,506 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 06:27:30,507 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 06:27:30,507 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 06:27:30,508 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 06:27:30,511 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 06:27:30,511 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 06:27:30,511 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 06:27:30,512 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 06:27:30,512 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 06:27:30,513 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 06:27:30,513 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 06:27:30,513 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 06:27:30,513 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 06:27:30,514 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 06:27:30,514 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 06:27:30,514 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 06:27:30,515 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 06:27:30,515 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 06:27:30,515 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 06:27:30,516 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 06:27:30,516 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 06:27:30,518 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 06:27:30,537 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 06:27:30,537 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 06:27:30,537 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 06:27:30,537 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 06:27:30,538 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 06:27:30,538 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 06:27:30,538 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 06:27:30,538 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 06:27:30,538 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 06:27:30,538 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 06:27:30,538 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 06:27:30,538 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 06:27:30,539 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 06:27:30,539 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 06:27:30,539 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 06:27:30,539 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 06:27:30,539 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 06:27:30,539 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 06:27:30,539 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 06:27:30,539 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 06:27:30,539 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 06:27:30,540 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 06:27:30,540 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 06:27:30,540 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 06:27:30,540 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 06:27:30,540 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 06:27:30,540 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 06:27:30,540 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 06:27:30,540 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 06:27:30,540 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 06:27:30,540 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 06:27:30,540 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 06:27:30,541 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 06:27:30,541 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 06:27:30,541 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 06:27:30,541 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 06:27:30,541 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 06:27:30,541 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 06:27:30,541 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 06:27:30,541 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 06:27:30,541 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 06:27:30,541 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 06:27:30,703 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 06:27:30,720 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 06:27:30,721 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 06:27:30,722 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 06:27:30,723 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 06:27:30,724 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-04-01 06:27:31,683 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 06:27:31,897 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 06:27:31,897 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-04-01 06:27:31,911 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/30714c1c0/e191d581b04c4ffc8c8ef80fb95725be/FLAG93037bcc7 [2023-04-01 06:27:31,922 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/30714c1c0/e191d581b04c4ffc8c8ef80fb95725be [2023-04-01 06:27:31,924 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 06:27:31,926 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 06:27:31,928 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 06:27:31,928 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 06:27:31,931 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 06:27:31,931 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 06:27:31" (1/1) ... [2023-04-01 06:27:31,932 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@757e4677 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:27:31, skipping insertion in model container [2023-04-01 06:27:31,932 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 06:27:31" (1/1) ... [2023-04-01 06:27:31,937 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 06:27:31,978 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 06:27:32,175 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_floodmax.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[12650,12663] [2023-04-01 06:27:32,224 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 06:27:32,248 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 06:27:32,300 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_floodmax.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[12650,12663] [2023-04-01 06:27:32,333 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 06:27:32,346 INFO L208 MainTranslator]: Completed translation [2023-04-01 06:27:32,346 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:27:32 WrapperNode [2023-04-01 06:27:32,346 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 06:27:32,347 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 06:27:32,347 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 06:27:32,347 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 06:27:32,355 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:27:32" (1/1) ... [2023-04-01 06:27:32,355 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:27:32" (1/1) ... [2023-04-01 06:27:32,370 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:27:32" (1/1) ... [2023-04-01 06:27:32,371 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:27:32" (1/1) ... [2023-04-01 06:27:32,390 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:27:32" (1/1) ... [2023-04-01 06:27:32,400 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:27:32" (1/1) ... [2023-04-01 06:27:32,407 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:27:32" (1/1) ... [2023-04-01 06:27:32,411 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:27:32" (1/1) ... [2023-04-01 06:27:32,417 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 06:27:32,418 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 06:27:32,418 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 06:27:32,418 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 06:27:32,418 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:27:32" (1/1) ... [2023-04-01 06:27:32,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 06:27:32,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 06:27:32,442 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 06:27:32,469 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 06:27:32,469 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 06:27:32,469 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 06:27:32,469 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 06:27:32,469 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 06:27:32,470 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 06:27:32,470 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 06:27:32,470 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 06:27:32,470 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 06:27:32,470 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-01 06:27:32,470 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2023-04-01 06:27:32,470 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-01 06:27:32,470 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-01 06:27:32,470 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 06:27:32,470 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-01 06:27:32,470 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-01 06:27:32,470 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-01 06:27:32,470 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-01 06:27:32,471 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-01 06:27:32,471 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2023-04-01 06:27:32,471 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-01 06:27:32,471 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-01 06:27:32,471 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 06:27:32,471 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 06:27:32,471 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 06:27:32,471 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 06:27:32,471 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 06:27:32,471 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 06:27:32,471 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 06:27:32,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 06:27:32,586 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 06:27:32,588 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 06:27:33,264 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 06:27:33,466 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 06:27:33,466 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-01 06:27:33,470 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 06:27:33 BoogieIcfgContainer [2023-04-01 06:27:33,470 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 06:27:33,472 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 06:27:33,472 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 06:27:33,474 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 06:27:33,475 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 06:27:31" (1/3) ... [2023-04-01 06:27:33,475 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b5dfdb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 06:27:33, skipping insertion in model container [2023-04-01 06:27:33,475 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:27:32" (2/3) ... [2023-04-01 06:27:33,476 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b5dfdb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 06:27:33, skipping insertion in model container [2023-04-01 06:27:33,476 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 06:27:33" (3/3) ... [2023-04-01 06:27:33,477 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_floodmax.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-04-01 06:27:33,489 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 06:27:33,489 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 06:27:33,537 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 06:27:33,542 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;@50dca23b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 06:27:33,543 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 06:27:33,547 INFO L276 IsEmpty]: Start isEmpty. Operand has 256 states, 243 states have (on average 1.662551440329218) internal successors, (404), 251 states have internal predecessors, (404), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 06:27:33,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2023-04-01 06:27:33,559 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:27:33,559 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:27:33,559 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:27:33,563 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:27:33,563 INFO L85 PathProgramCache]: Analyzing trace with hash 784566064, now seen corresponding path program 1 times [2023-04-01 06:27:33,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:27:33,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862109630] [2023-04-01 06:27:33,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:27:33,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:27:33,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:27:34,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:27:34,037 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:27:34,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862109630] [2023-04-01 06:27:34,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862109630] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:27:34,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:27:34,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 06:27:34,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496405994] [2023-04-01 06:27:34,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:27:34,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:27:34,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:27:34,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:27:34,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:27:34,084 INFO L87 Difference]: Start difference. First operand has 256 states, 243 states have (on average 1.662551440329218) internal successors, (404), 251 states have internal predecessors, (404), 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 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:27:34,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:27:34,252 INFO L93 Difference]: Finished difference Result 439 states and 679 transitions. [2023-04-01 06:27:34,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 06:27:34,254 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 93 [2023-04-01 06:27:34,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:27:34,262 INFO L225 Difference]: With dead ends: 439 [2023-04-01 06:27:34,262 INFO L226 Difference]: Without dead ends: 317 [2023-04-01 06:27:34,265 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:27:34,267 INFO L413 NwaCegarLoop]: 491 mSDtfsCounter, 152 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 827 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 06:27:34,268 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 827 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 06:27:34,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2023-04-01 06:27:34,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 315. [2023-04-01 06:27:34,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 311 states have (on average 1.517684887459807) internal successors, (472), 311 states have internal predecessors, (472), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:27:34,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 475 transitions. [2023-04-01 06:27:34,346 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 475 transitions. Word has length 93 [2023-04-01 06:27:34,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:27:34,346 INFO L495 AbstractCegarLoop]: Abstraction has 315 states and 475 transitions. [2023-04-01 06:27:34,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:27:34,347 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 475 transitions. [2023-04-01 06:27:34,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-04-01 06:27:34,349 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:27:34,349 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] [2023-04-01 06:27:34,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 06:27:34,349 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:27:34,350 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:27:34,350 INFO L85 PathProgramCache]: Analyzing trace with hash -2104765826, now seen corresponding path program 1 times [2023-04-01 06:27:34,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:27:34,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840394431] [2023-04-01 06:27:34,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:27:34,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:27:34,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:27:34,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:27:34,513 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:27:34,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840394431] [2023-04-01 06:27:34,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840394431] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:27:34,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:27:34,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 06:27:34,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324185267] [2023-04-01 06:27:34,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:27:34,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:27:34,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:27:34,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:27:34,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:27:34,516 INFO L87 Difference]: Start difference. First operand 315 states and 475 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:27:34,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:27:34,640 INFO L93 Difference]: Finished difference Result 563 states and 860 transitions. [2023-04-01 06:27:34,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 06:27:34,643 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 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 95 [2023-04-01 06:27:34,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:27:34,650 INFO L225 Difference]: With dead ends: 563 [2023-04-01 06:27:34,650 INFO L226 Difference]: Without dead ends: 404 [2023-04-01 06:27:34,652 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:27:34,653 INFO L413 NwaCegarLoop]: 332 mSDtfsCounter, 133 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 636 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 06:27:34,654 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 636 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 06:27:34,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2023-04-01 06:27:34,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 402. [2023-04-01 06:27:34,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 398 states have (on average 1.520100502512563) internal successors, (605), 398 states have internal predecessors, (605), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:27:34,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 608 transitions. [2023-04-01 06:27:34,679 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 608 transitions. Word has length 95 [2023-04-01 06:27:34,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:27:34,680 INFO L495 AbstractCegarLoop]: Abstraction has 402 states and 608 transitions. [2023-04-01 06:27:34,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:27:34,680 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 608 transitions. [2023-04-01 06:27:34,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2023-04-01 06:27:34,687 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:27:34,688 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:27:34,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 06:27:34,688 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:27:34,688 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:27:34,689 INFO L85 PathProgramCache]: Analyzing trace with hash -819118258, now seen corresponding path program 1 times [2023-04-01 06:27:34,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:27:34,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597471644] [2023-04-01 06:27:34,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:27:34,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:27:34,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:27:34,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:27:34,852 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:27:34,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597471644] [2023-04-01 06:27:34,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597471644] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:27:34,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:27:34,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 06:27:34,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151980740] [2023-04-01 06:27:34,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:27:34,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:27:34,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:27:34,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:27:34,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:27:34,854 INFO L87 Difference]: Start difference. First operand 402 states and 608 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:27:34,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:27:34,962 INFO L93 Difference]: Finished difference Result 841 states and 1285 transitions. [2023-04-01 06:27:34,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 06:27:34,963 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 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 98 [2023-04-01 06:27:34,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:27:34,967 INFO L225 Difference]: With dead ends: 841 [2023-04-01 06:27:34,967 INFO L226 Difference]: Without dead ends: 596 [2023-04-01 06:27:34,971 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:27:34,973 INFO L413 NwaCegarLoop]: 410 mSDtfsCounter, 132 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 712 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 06:27:34,975 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 712 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 06:27:34,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2023-04-01 06:27:35,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 594. [2023-04-01 06:27:35,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 594 states, 590 states have (on average 1.523728813559322) internal successors, (899), 590 states have internal predecessors, (899), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:27:35,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 594 states to 594 states and 902 transitions. [2023-04-01 06:27:35,016 INFO L78 Accepts]: Start accepts. Automaton has 594 states and 902 transitions. Word has length 98 [2023-04-01 06:27:35,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:27:35,016 INFO L495 AbstractCegarLoop]: Abstraction has 594 states and 902 transitions. [2023-04-01 06:27:35,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:27:35,016 INFO L276 IsEmpty]: Start isEmpty. Operand 594 states and 902 transitions. [2023-04-01 06:27:35,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-04-01 06:27:35,021 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:27:35,021 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] [2023-04-01 06:27:35,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 06:27:35,021 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:27:35,022 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:27:35,023 INFO L85 PathProgramCache]: Analyzing trace with hash -1386439012, now seen corresponding path program 1 times [2023-04-01 06:27:35,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:27:35,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897861779] [2023-04-01 06:27:35,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:27:35,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:27:35,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:27:35,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:27:35,155 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:27:35,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897861779] [2023-04-01 06:27:35,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897861779] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:27:35,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:27:35,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 06:27:35,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901580868] [2023-04-01 06:27:35,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:27:35,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:27:35,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:27:35,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:27:35,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:27:35,158 INFO L87 Difference]: Start difference. First operand 594 states and 902 transitions. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:27:35,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:27:35,280 INFO L93 Difference]: Finished difference Result 1294 states and 1981 transitions. [2023-04-01 06:27:35,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 06:27:35,281 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 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 100 [2023-04-01 06:27:35,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:27:35,285 INFO L225 Difference]: With dead ends: 1294 [2023-04-01 06:27:35,286 INFO L226 Difference]: Without dead ends: 857 [2023-04-01 06:27:35,286 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:27:35,294 INFO L413 NwaCegarLoop]: 341 mSDtfsCounter, 131 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 653 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 06:27:35,295 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 653 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 06:27:35,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 857 states. [2023-04-01 06:27:35,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 857 to 855. [2023-04-01 06:27:35,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 855 states, 851 states have (on average 1.5287896592244419) internal successors, (1301), 851 states have internal predecessors, (1301), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:27:35,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 855 states to 855 states and 1304 transitions. [2023-04-01 06:27:35,337 INFO L78 Accepts]: Start accepts. Automaton has 855 states and 1304 transitions. Word has length 100 [2023-04-01 06:27:35,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:27:35,338 INFO L495 AbstractCegarLoop]: Abstraction has 855 states and 1304 transitions. [2023-04-01 06:27:35,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:27:35,338 INFO L276 IsEmpty]: Start isEmpty. Operand 855 states and 1304 transitions. [2023-04-01 06:27:35,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-04-01 06:27:35,339 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:27:35,339 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] [2023-04-01 06:27:35,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 06:27:35,339 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:27:35,339 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:27:35,339 INFO L85 PathProgramCache]: Analyzing trace with hash 1932221872, now seen corresponding path program 1 times [2023-04-01 06:27:35,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:27:35,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442646279] [2023-04-01 06:27:35,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:27:35,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:27:35,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:27:35,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:27:35,434 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:27:35,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442646279] [2023-04-01 06:27:35,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442646279] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:27:35,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:27:35,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 06:27:35,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513929493] [2023-04-01 06:27:35,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:27:35,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:27:35,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:27:35,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:27:35,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:27:35,438 INFO L87 Difference]: Start difference. First operand 855 states and 1304 transitions. Second operand has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:27:35,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:27:35,592 INFO L93 Difference]: Finished difference Result 2062 states and 3157 transitions. [2023-04-01 06:27:35,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 06:27:35,592 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 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 103 [2023-04-01 06:27:35,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:27:35,597 INFO L225 Difference]: With dead ends: 2062 [2023-04-01 06:27:35,597 INFO L226 Difference]: Without dead ends: 1382 [2023-04-01 06:27:35,598 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:27:35,598 INFO L413 NwaCegarLoop]: 382 mSDtfsCounter, 126 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 685 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 06:27:35,599 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 685 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 06:27:35,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1382 states. [2023-04-01 06:27:35,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1382 to 1380. [2023-04-01 06:27:35,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1380 states, 1376 states have (on average 1.5232558139534884) internal successors, (2096), 1376 states have internal predecessors, (2096), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:27:35,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1380 states to 1380 states and 2099 transitions. [2023-04-01 06:27:35,696 INFO L78 Accepts]: Start accepts. Automaton has 1380 states and 2099 transitions. Word has length 103 [2023-04-01 06:27:35,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:27:35,696 INFO L495 AbstractCegarLoop]: Abstraction has 1380 states and 2099 transitions. [2023-04-01 06:27:35,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:27:35,696 INFO L276 IsEmpty]: Start isEmpty. Operand 1380 states and 2099 transitions. [2023-04-01 06:27:35,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2023-04-01 06:27:35,697 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:27:35,697 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:27:35,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 06:27:35,697 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:27:35,698 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:27:35,698 INFO L85 PathProgramCache]: Analyzing trace with hash -2033101313, now seen corresponding path program 1 times [2023-04-01 06:27:35,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:27:35,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443221770] [2023-04-01 06:27:35,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:27:35,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:27:35,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:27:35,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:27:35,796 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:27:35,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443221770] [2023-04-01 06:27:35,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443221770] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:27:35,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:27:35,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 06:27:35,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742205738] [2023-04-01 06:27:35,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:27:35,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:27:35,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:27:35,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:27:35,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:27:35,797 INFO L87 Difference]: Start difference. First operand 1380 states and 2099 transitions. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:27:35,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:27:35,990 INFO L93 Difference]: Finished difference Result 3283 states and 5017 transitions. [2023-04-01 06:27:35,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 06:27:35,991 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 105 [2023-04-01 06:27:35,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:27:35,996 INFO L225 Difference]: With dead ends: 3283 [2023-04-01 06:27:35,996 INFO L226 Difference]: Without dead ends: 2078 [2023-04-01 06:27:35,998 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:27:35,999 INFO L413 NwaCegarLoop]: 342 mSDtfsCounter, 125 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 655 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 06:27:35,999 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 655 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 06:27:36,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2078 states. [2023-04-01 06:27:36,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2078 to 2076. [2023-04-01 06:27:36,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2076 states, 2072 states have (on average 1.5255791505791505) internal successors, (3161), 2072 states have internal predecessors, (3161), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:27:36,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2076 states to 2076 states and 3164 transitions. [2023-04-01 06:27:36,139 INFO L78 Accepts]: Start accepts. Automaton has 2076 states and 3164 transitions. Word has length 105 [2023-04-01 06:27:36,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:27:36,139 INFO L495 AbstractCegarLoop]: Abstraction has 2076 states and 3164 transitions. [2023-04-01 06:27:36,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:27:36,139 INFO L276 IsEmpty]: Start isEmpty. Operand 2076 states and 3164 transitions. [2023-04-01 06:27:36,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-04-01 06:27:36,140 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:27:36,140 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] [2023-04-01 06:27:36,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-01 06:27:36,140 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:27:36,141 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:27:36,141 INFO L85 PathProgramCache]: Analyzing trace with hash -57185017, now seen corresponding path program 1 times [2023-04-01 06:27:36,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:27:36,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558625326] [2023-04-01 06:27:36,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:27:36,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:27:36,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:27:36,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:27:36,241 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:27:36,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558625326] [2023-04-01 06:27:36,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558625326] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:27:36,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:27:36,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 06:27:36,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984017540] [2023-04-01 06:27:36,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:27:36,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:27:36,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:27:36,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:27:36,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:27:36,242 INFO L87 Difference]: Start difference. First operand 2076 states and 3164 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:27:36,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:27:36,601 INFO L93 Difference]: Finished difference Result 5383 states and 8197 transitions. [2023-04-01 06:27:36,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 06:27:36,602 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 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 108 [2023-04-01 06:27:36,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:27:36,612 INFO L225 Difference]: With dead ends: 5383 [2023-04-01 06:27:36,613 INFO L226 Difference]: Without dead ends: 3500 [2023-04-01 06:27:36,618 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:27:36,619 INFO L413 NwaCegarLoop]: 354 mSDtfsCounter, 120 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 658 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 06:27:36,619 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 658 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 06:27:36,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3500 states. [2023-04-01 06:27:36,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3500 to 3498. [2023-04-01 06:27:36,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3498 states, 3494 states have (on average 1.5125930165998855) internal successors, (5285), 3494 states have internal predecessors, (5285), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:27:36,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3498 states to 3498 states and 5288 transitions. [2023-04-01 06:27:36,948 INFO L78 Accepts]: Start accepts. Automaton has 3498 states and 5288 transitions. Word has length 108 [2023-04-01 06:27:36,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:27:36,949 INFO L495 AbstractCegarLoop]: Abstraction has 3498 states and 5288 transitions. [2023-04-01 06:27:36,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:27:36,949 INFO L276 IsEmpty]: Start isEmpty. Operand 3498 states and 5288 transitions. [2023-04-01 06:27:36,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2023-04-01 06:27:36,950 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:27:36,950 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] [2023-04-01 06:27:36,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-01 06:27:36,950 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:27:36,950 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:27:36,950 INFO L85 PathProgramCache]: Analyzing trace with hash 646881863, now seen corresponding path program 1 times [2023-04-01 06:27:36,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:27:36,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173306468] [2023-04-01 06:27:36,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:27:36,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:27:36,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:27:37,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:27:37,070 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:27:37,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173306468] [2023-04-01 06:27:37,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173306468] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:27:37,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:27:37,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 06:27:37,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332039040] [2023-04-01 06:27:37,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:27:37,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:27:37,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:27:37,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:27:37,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:27:37,072 INFO L87 Difference]: Start difference. First operand 3498 states and 5288 transitions. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:27:37,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:27:37,511 INFO L93 Difference]: Finished difference Result 8704 states and 13201 transitions. [2023-04-01 06:27:37,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 06:27:37,512 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 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 110 [2023-04-01 06:27:37,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:27:37,529 INFO L225 Difference]: With dead ends: 8704 [2023-04-01 06:27:37,530 INFO L226 Difference]: Without dead ends: 5399 [2023-04-01 06:27:37,535 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:27:37,536 INFO L413 NwaCegarLoop]: 343 mSDtfsCounter, 119 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 657 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 06:27:37,536 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 657 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 06:27:37,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5399 states. [2023-04-01 06:27:37,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5399 to 5397. [2023-04-01 06:27:37,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5397 states, 5393 states have (on average 1.5139996291488966) internal successors, (8165), 5393 states have internal predecessors, (8165), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:27:37,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5397 states to 5397 states and 8168 transitions. [2023-04-01 06:27:37,961 INFO L78 Accepts]: Start accepts. Automaton has 5397 states and 8168 transitions. Word has length 110 [2023-04-01 06:27:37,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:27:37,961 INFO L495 AbstractCegarLoop]: Abstraction has 5397 states and 8168 transitions. [2023-04-01 06:27:37,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:27:37,961 INFO L276 IsEmpty]: Start isEmpty. Operand 5397 states and 8168 transitions. [2023-04-01 06:27:37,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2023-04-01 06:27:37,962 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:27:37,962 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] [2023-04-01 06:27:37,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-01 06:27:37,962 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:27:37,963 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:27:37,963 INFO L85 PathProgramCache]: Analyzing trace with hash 592151331, now seen corresponding path program 1 times [2023-04-01 06:27:37,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:27:37,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448196714] [2023-04-01 06:27:37,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:27:37,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:27:37,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:27:38,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:27:38,157 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:27:38,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448196714] [2023-04-01 06:27:38,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448196714] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:27:38,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:27:38,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 06:27:38,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274463008] [2023-04-01 06:27:38,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:27:38,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 06:27:38,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:27:38,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 06:27:38,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-01 06:27:38,160 INFO L87 Difference]: Start difference. First operand 5397 states and 8168 transitions. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:27:39,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:27:39,136 INFO L93 Difference]: Finished difference Result 13480 states and 20467 transitions. [2023-04-01 06:27:39,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 06:27:39,137 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 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 113 [2023-04-01 06:27:39,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:27:39,163 INFO L225 Difference]: With dead ends: 13480 [2023-04-01 06:27:39,163 INFO L226 Difference]: Without dead ends: 8240 [2023-04-01 06:27:39,170 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-04-01 06:27:39,171 INFO L413 NwaCegarLoop]: 349 mSDtfsCounter, 1005 mSDsluCounter, 2693 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1005 SdHoareTripleChecker+Valid, 3042 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 06:27:39,172 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1005 Valid, 3042 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 06:27:39,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8240 states. [2023-04-01 06:27:39,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8240 to 8183. [2023-04-01 06:27:39,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8183 states, 8179 states have (on average 1.5199902188531604) internal successors, (12432), 8179 states have internal predecessors, (12432), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:27:39,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8183 states to 8183 states and 12435 transitions. [2023-04-01 06:27:39,895 INFO L78 Accepts]: Start accepts. Automaton has 8183 states and 12435 transitions. Word has length 113 [2023-04-01 06:27:39,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:27:39,895 INFO L495 AbstractCegarLoop]: Abstraction has 8183 states and 12435 transitions. [2023-04-01 06:27:39,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:27:39,896 INFO L276 IsEmpty]: Start isEmpty. Operand 8183 states and 12435 transitions. [2023-04-01 06:27:39,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2023-04-01 06:27:39,897 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:27:39,897 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] [2023-04-01 06:27:39,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-01 06:27:39,897 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:27:39,897 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:27:39,898 INFO L85 PathProgramCache]: Analyzing trace with hash 1110653765, now seen corresponding path program 1 times [2023-04-01 06:27:39,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:27:39,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219384988] [2023-04-01 06:27:39,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:27:39,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:27:39,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:27:40,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:27:40,008 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:27:40,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219384988] [2023-04-01 06:27:40,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219384988] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:27:40,008 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:27:40,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 06:27:40,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907973848] [2023-04-01 06:27:40,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:27:40,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 06:27:40,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:27:40,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 06:27:40,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 06:27:40,019 INFO L87 Difference]: Start difference. First operand 8183 states and 12435 transitions. Second operand has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:27:40,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:27:40,681 INFO L93 Difference]: Finished difference Result 16157 states and 24561 transitions. [2023-04-01 06:27:40,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 06:27:40,682 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 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 114 [2023-04-01 06:27:40,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:27:40,711 INFO L225 Difference]: With dead ends: 16157 [2023-04-01 06:27:40,711 INFO L226 Difference]: Without dead ends: 8185 [2023-04-01 06:27:40,727 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 [2023-04-01 06:27:40,727 INFO L413 NwaCegarLoop]: 336 mSDtfsCounter, 245 mSDsluCounter, 632 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 968 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 06:27:40,728 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [245 Valid, 968 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 06:27:40,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8185 states. [2023-04-01 06:27:41,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8185 to 8176. [2023-04-01 06:27:41,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8176 states, 8172 states have (on average 1.5162750856583456) internal successors, (12391), 8172 states have internal predecessors, (12391), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:27:41,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8176 states to 8176 states and 12394 transitions. [2023-04-01 06:27:41,264 INFO L78 Accepts]: Start accepts. Automaton has 8176 states and 12394 transitions. Word has length 114 [2023-04-01 06:27:41,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:27:41,265 INFO L495 AbstractCegarLoop]: Abstraction has 8176 states and 12394 transitions. [2023-04-01 06:27:41,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:27:41,265 INFO L276 IsEmpty]: Start isEmpty. Operand 8176 states and 12394 transitions. [2023-04-01 06:27:41,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-04-01 06:27:41,266 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:27:41,266 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] [2023-04-01 06:27:41,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-01 06:27:41,266 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:27:41,266 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:27:41,266 INFO L85 PathProgramCache]: Analyzing trace with hash -733054658, now seen corresponding path program 1 times [2023-04-01 06:27:41,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:27:41,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859799591] [2023-04-01 06:27:41,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:27:41,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:27:41,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:27:41,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:27:41,573 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:27:41,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859799591] [2023-04-01 06:27:41,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859799591] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:27:41,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:27:41,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 06:27:41,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487031377] [2023-04-01 06:27:41,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:27:41,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 06:27:41,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:27:41,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 06:27:41,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 06:27:41,574 INFO L87 Difference]: Start difference. First operand 8176 states and 12394 transitions. Second operand has 5 states, 5 states have (on average 24.0) internal successors, (120), 5 states have internal predecessors, (120), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:27:42,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:27:42,720 INFO L93 Difference]: Finished difference Result 13202 states and 19788 transitions. [2023-04-01 06:27:42,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 06:27:42,721 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 24.0) internal successors, (120), 5 states have internal predecessors, (120), 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 123 [2023-04-01 06:27:42,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:27:42,753 INFO L225 Difference]: With dead ends: 13202 [2023-04-01 06:27:42,753 INFO L226 Difference]: Without dead ends: 13200 [2023-04-01 06:27:42,759 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 06:27:42,759 INFO L413 NwaCegarLoop]: 459 mSDtfsCounter, 253 mSDsluCounter, 1131 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 1590 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 06:27:42,759 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [253 Valid, 1590 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 06:27:42,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13200 states. [2023-04-01 06:27:43,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13200 to 8300. [2023-04-01 06:27:43,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8300 states, 8296 states have (on average 1.4997589199614272) internal successors, (12442), 8296 states have internal predecessors, (12442), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:27:43,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8300 states to 8300 states and 12445 transitions. [2023-04-01 06:27:43,550 INFO L78 Accepts]: Start accepts. Automaton has 8300 states and 12445 transitions. Word has length 123 [2023-04-01 06:27:43,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:27:43,551 INFO L495 AbstractCegarLoop]: Abstraction has 8300 states and 12445 transitions. [2023-04-01 06:27:43,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.0) internal successors, (120), 5 states have internal predecessors, (120), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:27:43,551 INFO L276 IsEmpty]: Start isEmpty. Operand 8300 states and 12445 transitions. [2023-04-01 06:27:43,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2023-04-01 06:27:43,552 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:27:43,552 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:27:43,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-04-01 06:27:43,552 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:27:43,552 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:27:43,553 INFO L85 PathProgramCache]: Analyzing trace with hash 1621457837, now seen corresponding path program 1 times [2023-04-01 06:27:43,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:27:43,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719146723] [2023-04-01 06:27:43,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:27:43,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:27:43,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:27:45,434 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:27:45,435 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:27:45,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719146723] [2023-04-01 06:27:45,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719146723] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 06:27:45,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680599857] [2023-04-01 06:27:45,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:27:45,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 06:27:45,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 06:27:45,437 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 06:27:45,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 06:27:45,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:27:45,683 INFO L262 TraceCheckSpWp]: Trace formula consists of 1313 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 06:27:45,690 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 06:27:45,838 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 06:27:45,839 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 06:27:45,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680599857] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:27:45,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 06:27:45,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [17] total 19 [2023-04-01 06:27:45,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459059989] [2023-04-01 06:27:45,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:27:45,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 06:27:45,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:27:45,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 06:27:45,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2023-04-01 06:27:45,840 INFO L87 Difference]: Start difference. First operand 8300 states and 12445 transitions. Second operand has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:27:47,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:27:47,216 INFO L93 Difference]: Finished difference Result 24499 states and 36733 transitions. [2023-04-01 06:27:47,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 06:27:47,217 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 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 131 [2023-04-01 06:27:47,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:27:47,252 INFO L225 Difference]: With dead ends: 24499 [2023-04-01 06:27:47,252 INFO L226 Difference]: Without dead ends: 16222 [2023-04-01 06:27:47,267 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=96, Invalid=284, Unknown=0, NotChecked=0, Total=380 [2023-04-01 06:27:47,267 INFO L413 NwaCegarLoop]: 427 mSDtfsCounter, 830 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 830 SdHoareTripleChecker+Valid, 748 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 06:27:47,268 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [830 Valid, 748 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 06:27:47,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16222 states. [2023-04-01 06:27:48,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16222 to 16220. [2023-04-01 06:27:48,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16220 states, 16216 states have (on average 1.4939565860878146) internal successors, (24226), 16216 states have internal predecessors, (24226), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:27:48,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16220 states to 16220 states and 24229 transitions. [2023-04-01 06:27:48,843 INFO L78 Accepts]: Start accepts. Automaton has 16220 states and 24229 transitions. Word has length 131 [2023-04-01 06:27:48,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:27:48,844 INFO L495 AbstractCegarLoop]: Abstraction has 16220 states and 24229 transitions. [2023-04-01 06:27:48,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:27:48,844 INFO L276 IsEmpty]: Start isEmpty. Operand 16220 states and 24229 transitions. [2023-04-01 06:27:48,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2023-04-01 06:27:48,845 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:27:48,845 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:27:48,855 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-01 06:27:49,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-04-01 06:27:49,053 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:27:49,053 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:27:49,053 INFO L85 PathProgramCache]: Analyzing trace with hash 899894629, now seen corresponding path program 1 times [2023-04-01 06:27:49,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:27:49,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445468053] [2023-04-01 06:27:49,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:27:49,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:27:49,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:27:49,151 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-01 06:27:49,151 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:27:49,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445468053] [2023-04-01 06:27:49,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445468053] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:27:49,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:27:49,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 06:27:49,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042814125] [2023-04-01 06:27:49,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:27:49,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:27:49,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:27:49,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:27:49,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:27:49,153 INFO L87 Difference]: Start difference. First operand 16220 states and 24229 transitions. Second operand has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:27:51,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:27:51,953 INFO L93 Difference]: Finished difference Result 47602 states and 71091 transitions. [2023-04-01 06:27:51,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 06:27:51,955 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 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 133 [2023-04-01 06:27:51,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:27:52,017 INFO L225 Difference]: With dead ends: 47602 [2023-04-01 06:27:52,018 INFO L226 Difference]: Without dead ends: 31501 [2023-04-01 06:27:52,045 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:27:52,046 INFO L413 NwaCegarLoop]: 621 mSDtfsCounter, 241 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 941 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 06:27:52,046 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 941 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 06:27:52,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31501 states. [2023-04-01 06:27:55,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31501 to 31499. [2023-04-01 06:27:55,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31499 states, 31495 states have (on average 1.4866486743927607) internal successors, (46822), 31495 states have internal predecessors, (46822), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:27:55,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31499 states to 31499 states and 46825 transitions. [2023-04-01 06:27:55,334 INFO L78 Accepts]: Start accepts. Automaton has 31499 states and 46825 transitions. Word has length 133 [2023-04-01 06:27:55,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:27:55,335 INFO L495 AbstractCegarLoop]: Abstraction has 31499 states and 46825 transitions. [2023-04-01 06:27:55,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:27:55,335 INFO L276 IsEmpty]: Start isEmpty. Operand 31499 states and 46825 transitions. [2023-04-01 06:27:55,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2023-04-01 06:27:55,345 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:27:55,345 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:27:55,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-04-01 06:27:55,345 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:27:55,345 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:27:55,345 INFO L85 PathProgramCache]: Analyzing trace with hash -1644769300, now seen corresponding path program 1 times [2023-04-01 06:27:55,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:27:55,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659170367] [2023-04-01 06:27:55,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:27:55,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:27:55,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:27:55,415 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-01 06:27:55,415 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:27:55,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659170367] [2023-04-01 06:27:55,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659170367] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:27:55,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:27:55,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 06:27:55,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401155018] [2023-04-01 06:27:55,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:27:55,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:27:55,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:27:55,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:27:55,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:27:55,419 INFO L87 Difference]: Start difference. First operand 31499 states and 46825 transitions. Second operand has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:28:02,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:28:02,074 INFO L93 Difference]: Finished difference Result 94379 states and 140293 transitions. [2023-04-01 06:28:02,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 06:28:02,075 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 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 133 [2023-04-01 06:28:02,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:28:02,198 INFO L225 Difference]: With dead ends: 94379 [2023-04-01 06:28:02,198 INFO L226 Difference]: Without dead ends: 62927 [2023-04-01 06:28:02,249 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:28:02,250 INFO L413 NwaCegarLoop]: 335 mSDtfsCounter, 326 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 661 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 06:28:02,250 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [326 Valid, 661 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 06:28:02,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62927 states. [2023-04-01 06:28:06,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62927 to 31511. [2023-04-01 06:28:06,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31511 states, 31507 states have (on average 1.4865268035674613) internal successors, (46836), 31507 states have internal predecessors, (46836), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:28:06,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31511 states to 31511 states and 46839 transitions. [2023-04-01 06:28:06,315 INFO L78 Accepts]: Start accepts. Automaton has 31511 states and 46839 transitions. Word has length 133 [2023-04-01 06:28:06,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:28:06,315 INFO L495 AbstractCegarLoop]: Abstraction has 31511 states and 46839 transitions. [2023-04-01 06:28:06,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:28:06,315 INFO L276 IsEmpty]: Start isEmpty. Operand 31511 states and 46839 transitions. [2023-04-01 06:28:06,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2023-04-01 06:28:06,318 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:28:06,318 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:28:06,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-04-01 06:28:06,319 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:28:06,319 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:28:06,319 INFO L85 PathProgramCache]: Analyzing trace with hash -1793172859, now seen corresponding path program 1 times [2023-04-01 06:28:06,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:28:06,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190221866] [2023-04-01 06:28:06,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:28:06,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:28:06,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:28:07,622 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 06:28:07,622 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:28:07,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190221866] [2023-04-01 06:28:07,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190221866] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 06:28:07,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939318285] [2023-04-01 06:28:07,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:28:07,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 06:28:07,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 06:28:07,624 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 06:28:07,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 06:28:07,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:28:07,882 INFO L262 TraceCheckSpWp]: Trace formula consists of 1319 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 06:28:07,895 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 06:28:08,055 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 06:28:08,055 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 06:28:08,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939318285] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:28:08,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 06:28:08,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [13] total 15 [2023-04-01 06:28:08,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970613677] [2023-04-01 06:28:08,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:28:08,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 06:28:08,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:28:08,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 06:28:08,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2023-04-01 06:28:08,057 INFO L87 Difference]: Start difference. First operand 31511 states and 46839 transitions. Second operand has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:28:15,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:28:15,848 INFO L93 Difference]: Finished difference Result 93119 states and 138395 transitions. [2023-04-01 06:28:15,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 06:28:15,849 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 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 134 [2023-04-01 06:28:15,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:28:15,981 INFO L225 Difference]: With dead ends: 93119 [2023-04-01 06:28:15,981 INFO L226 Difference]: Without dead ends: 61695 [2023-04-01 06:28:16,024 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2023-04-01 06:28:16,025 INFO L413 NwaCegarLoop]: 404 mSDtfsCounter, 798 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 798 SdHoareTripleChecker+Valid, 721 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 06:28:16,025 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [798 Valid, 721 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 06:28:16,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61695 states. [2023-04-01 06:28:24,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61695 to 61693. [2023-04-01 06:28:24,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61693 states, 61689 states have (on average 1.480960949277829) internal successors, (91359), 61689 states have internal predecessors, (91359), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:28:24,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61693 states to 61693 states and 91362 transitions. [2023-04-01 06:28:24,358 INFO L78 Accepts]: Start accepts. Automaton has 61693 states and 91362 transitions. Word has length 134 [2023-04-01 06:28:24,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:28:24,358 INFO L495 AbstractCegarLoop]: Abstraction has 61693 states and 91362 transitions. [2023-04-01 06:28:24,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:28:24,358 INFO L276 IsEmpty]: Start isEmpty. Operand 61693 states and 91362 transitions. [2023-04-01 06:28:24,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2023-04-01 06:28:24,362 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:28:24,362 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:28:24,374 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 06:28:24,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-04-01 06:28:24,569 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:28:24,569 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:28:24,569 INFO L85 PathProgramCache]: Analyzing trace with hash 1635113363, now seen corresponding path program 1 times [2023-04-01 06:28:24,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:28:24,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383452001] [2023-04-01 06:28:24,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:28:24,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:28:24,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:28:24,665 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 06:28:24,665 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:28:24,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383452001] [2023-04-01 06:28:24,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383452001] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:28:24,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:28:24,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 06:28:24,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866762466] [2023-04-01 06:28:24,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:28:24,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:28:24,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:28:24,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:28:24,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:28:24,667 INFO L87 Difference]: Start difference. First operand 61693 states and 91362 transitions. Second operand has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 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)