/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.1.ufo.BOUNDED-12.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-03 02:51:55,347 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-03 02:51:55,348 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-03 02:51:55,376 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-03 02:51:55,377 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-03 02:51:55,379 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-03 02:51:55,382 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-03 02:51:55,384 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-03 02:51:55,385 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-03 02:51:55,389 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-03 02:51:55,391 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-03 02:51:55,392 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-03 02:51:55,392 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-03 02:51:55,393 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-03 02:51:55,394 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-03 02:51:55,394 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-03 02:51:55,395 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-03 02:51:55,396 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-03 02:51:55,397 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-03 02:51:55,398 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-03 02:51:55,399 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-03 02:51:55,400 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-03 02:51:55,401 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-03 02:51:55,401 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-03 02:51:55,404 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-03 02:51:55,404 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-03 02:51:55,404 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-03 02:51:55,405 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-03 02:51:55,405 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-03 02:51:55,406 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-03 02:51:55,406 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-03 02:51:55,407 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-03 02:51:55,407 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-03 02:51:55,408 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-03 02:51:55,411 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-03 02:51:55,412 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-03 02:51:55,413 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-03 02:51:55,413 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-03 02:51:55,413 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-03 02:51:55,415 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-03 02:51:55,416 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-03 02:51:55,417 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-03 02:51:55,447 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-03 02:51:55,447 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-03 02:51:55,448 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-03 02:51:55,448 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-03 02:51:55,448 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-03 02:51:55,449 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-03 02:51:55,449 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-03 02:51:55,449 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-03 02:51:55,449 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-03 02:51:55,449 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-03 02:51:55,450 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-03 02:51:55,450 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-03 02:51:55,450 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-03 02:51:55,450 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-03 02:51:55,450 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-03 02:51:55,450 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-03 02:51:55,450 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-03 02:51:55,451 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-03 02:51:55,451 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-03 02:51:55,451 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-03 02:51:55,451 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-03 02:51:55,451 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-03 02:51:55,452 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-03 02:51:55,452 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-03 02:51:55,452 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-03 02:51:55,452 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-03 02:51:55,452 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-03 02:51:55,452 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-03 02:51:55,452 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-03 02:51:55,452 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-03 02:51:55,453 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-03 02:51:55,453 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-03 02:51:55,453 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 02:51:55,453 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-03 02:51:55,453 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-03 02:51:55,454 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-03 02:51:55,454 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-03 02:51:55,454 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-03 02:51:55,454 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-03 02:51:55,454 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-03 02:51:55,454 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-03 02:51:55,454 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-03 02:51:55,655 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-03 02:51:55,676 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-03 02:51:55,680 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-03 02:51:55,681 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-03 02:51:55,681 INFO L275 PluginConnector]: CDTParser initialized [2023-04-03 02:51:55,682 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.1.ufo.BOUNDED-12.pals.c.v+nlh-reducer.c [2023-04-03 02:51:56,799 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-03 02:51:57,074 INFO L351 CDTParser]: Found 1 translation units. [2023-04-03 02:51:57,075 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.1.ufo.BOUNDED-12.pals.c.v+nlh-reducer.c [2023-04-03 02:51:57,085 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/56789cfa5/90418996190c498cb8c8f8a61c00bb4b/FLAGc92f1c446 [2023-04-03 02:51:57,098 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/56789cfa5/90418996190c498cb8c8f8a61c00bb4b [2023-04-03 02:51:57,100 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-03 02:51:57,102 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-03 02:51:57,103 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-03 02:51:57,103 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-03 02:51:57,106 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-03 02:51:57,106 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 02:51:57" (1/1) ... [2023-04-03 02:51:57,107 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68f5280f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:51:57, skipping insertion in model container [2023-04-03 02:51:57,107 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 02:51:57" (1/1) ... [2023-04-03 02:51:57,113 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-03 02:51:57,161 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-03 02:51:57,347 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.1.ufo.BOUNDED-12.pals.c.v+nlh-reducer.c[10021,10034] [2023-04-03 02:51:57,438 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 02:51:57,452 INFO L203 MainTranslator]: Completed pre-run [2023-04-03 02:51:57,512 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.1.ufo.BOUNDED-12.pals.c.v+nlh-reducer.c[10021,10034] [2023-04-03 02:51:57,551 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 02:51:57,574 INFO L208 MainTranslator]: Completed translation [2023-04-03 02:51:57,574 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:51:57 WrapperNode [2023-04-03 02:51:57,574 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-03 02:51:57,575 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-03 02:51:57,575 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-03 02:51:57,575 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-03 02:51:57,592 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:51:57" (1/1) ... [2023-04-03 02:51:57,592 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:51:57" (1/1) ... [2023-04-03 02:51:57,610 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:51:57" (1/1) ... [2023-04-03 02:51:57,610 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:51:57" (1/1) ... [2023-04-03 02:51:57,629 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:51:57" (1/1) ... [2023-04-03 02:51:57,640 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:51:57" (1/1) ... [2023-04-03 02:51:57,650 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:51:57" (1/1) ... [2023-04-03 02:51:57,654 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:51:57" (1/1) ... [2023-04-03 02:51:57,659 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-03 02:51:57,660 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-03 02:51:57,660 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-03 02:51:57,661 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-03 02:51:57,661 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:51:57" (1/1) ... [2023-04-03 02:51:57,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 02:51:57,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 02:51:57,704 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-03 02:51:57,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-03 02:51:57,740 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-03 02:51:57,740 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-03 02:51:57,740 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-03 02:51:57,740 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-03 02:51:57,740 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-03 02:51:57,740 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-03 02:51:57,741 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-03 02:51:57,741 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-03 02:51:57,741 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-03 02:51:57,741 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-03 02:51:57,741 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-03 02:51:57,741 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-03 02:51:57,741 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-03 02:51:57,741 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-03 02:51:57,742 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-03 02:51:57,742 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-03 02:51:57,742 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-03 02:51:57,742 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-03 02:51:57,742 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2023-04-03 02:51:57,742 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2023-04-03 02:51:57,742 INFO L130 BoogieDeclarations]: Found specification of procedure node6 [2023-04-03 02:51:57,742 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-03 02:51:57,742 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-03 02:51:57,743 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-03 02:51:57,743 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-03 02:51:57,743 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-03 02:51:57,743 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-03 02:51:57,743 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-03 02:51:57,743 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-03 02:51:57,743 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-03 02:51:57,908 INFO L236 CfgBuilder]: Building ICFG [2023-04-03 02:51:57,909 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-03 02:51:58,717 INFO L277 CfgBuilder]: Performing block encoding [2023-04-03 02:51:58,918 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-03 02:51:58,918 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-03 02:51:58,921 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 02:51:58 BoogieIcfgContainer [2023-04-03 02:51:58,921 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-03 02:51:58,923 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-03 02:51:58,923 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-03 02:51:58,926 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-03 02:51:58,926 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.04 02:51:57" (1/3) ... [2023-04-03 02:51:58,927 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58c6ab08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 02:51:58, skipping insertion in model container [2023-04-03 02:51:58,927 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:51:57" (2/3) ... [2023-04-03 02:51:58,927 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58c6ab08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 02:51:58, skipping insertion in model container [2023-04-03 02:51:58,927 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 02:51:58" (3/3) ... [2023-04-03 02:51:58,931 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.6.1.ufo.BOUNDED-12.pals.c.v+nlh-reducer.c [2023-04-03 02:51:58,947 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-03 02:51:58,947 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-03 02:51:59,009 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-03 02:51:59,015 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;@503e2ead, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-03 02:51:59,016 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-03 02:51:59,022 INFO L276 IsEmpty]: Start isEmpty. Operand has 204 states, 198 states have (on average 1.702020202020202) internal successors, (337), 199 states have internal predecessors, (337), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-03 02:51:59,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-04-03 02:51:59,032 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:51:59,033 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] [2023-04-03 02:51:59,033 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:51:59,037 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:51:59,038 INFO L85 PathProgramCache]: Analyzing trace with hash 1590931645, now seen corresponding path program 1 times [2023-04-03 02:51:59,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:51:59,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251465312] [2023-04-03 02:51:59,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:51:59,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:51:59,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:52:00,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:52:00,015 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:52:00,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251465312] [2023-04-03 02:52:00,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251465312] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:52:00,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:52:00,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-04-03 02:52:00,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923711850] [2023-04-03 02:52:00,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:52:00,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-03 02:52:00,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:52:00,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-03 02:52:00,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2023-04-03 02:52:00,067 INFO L87 Difference]: Start difference. First operand has 204 states, 198 states have (on average 1.702020202020202) internal successors, (337), 199 states have internal predecessors, (337), 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 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:52:00,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:52:00,583 INFO L93 Difference]: Finished difference Result 805 states and 1280 transitions. [2023-04-03 02:52:00,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-03 02:52:00,586 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 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 86 [2023-04-03 02:52:00,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:52:00,605 INFO L225 Difference]: With dead ends: 805 [2023-04-03 02:52:00,606 INFO L226 Difference]: Without dead ends: 676 [2023-04-03 02:52:00,610 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2023-04-03 02:52:00,613 INFO L413 NwaCegarLoop]: 456 mSDtfsCounter, 1386 mSDsluCounter, 1054 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1386 SdHoareTripleChecker+Valid, 1510 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-03 02:52:00,615 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1386 Valid, 1510 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-03 02:52:00,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2023-04-03 02:52:00,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 666. [2023-04-03 02:52:00,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 666 states, 662 states have (on average 1.4154078549848943) internal successors, (937), 662 states have internal predecessors, (937), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:52:00,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 666 states to 666 states and 940 transitions. [2023-04-03 02:52:00,785 INFO L78 Accepts]: Start accepts. Automaton has 666 states and 940 transitions. Word has length 86 [2023-04-03 02:52:00,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:52:00,786 INFO L495 AbstractCegarLoop]: Abstraction has 666 states and 940 transitions. [2023-04-03 02:52:00,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:52:00,787 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states and 940 transitions. [2023-04-03 02:52:00,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-04-03 02:52:00,794 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:52:00,794 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] [2023-04-03 02:52:00,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-03 02:52:00,795 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:52:00,795 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:52:00,796 INFO L85 PathProgramCache]: Analyzing trace with hash 2028045280, now seen corresponding path program 1 times [2023-04-03 02:52:00,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:52:00,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726053269] [2023-04-03 02:52:00,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:52:00,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:52:00,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:52:01,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:52:01,033 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:52:01,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726053269] [2023-04-03 02:52:01,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726053269] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:52:01,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:52:01,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 02:52:01,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020898384] [2023-04-03 02:52:01,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:52:01,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:52:01,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:52:01,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:52:01,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:52:01,037 INFO L87 Difference]: Start difference. First operand 666 states and 940 transitions. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 4 states have internal predecessors, (84), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:52:01,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:52:01,458 INFO L93 Difference]: Finished difference Result 1659 states and 2404 transitions. [2023-04-03 02:52:01,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 02:52:01,461 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 4 states have internal predecessors, (84), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 87 [2023-04-03 02:52:01,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:52:01,470 INFO L225 Difference]: With dead ends: 1659 [2023-04-03 02:52:01,470 INFO L226 Difference]: Without dead ends: 1064 [2023-04-03 02:52:01,478 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-03 02:52:01,480 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 708 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 708 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-03 02:52:01,480 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [708 Valid, 284 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-03 02:52:01,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1064 states. [2023-04-03 02:52:01,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1064 to 1062. [2023-04-03 02:52:01,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1062 states, 1058 states have (on average 1.445179584120983) internal successors, (1529), 1058 states have internal predecessors, (1529), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:52:01,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1062 states to 1062 states and 1532 transitions. [2023-04-03 02:52:01,675 INFO L78 Accepts]: Start accepts. Automaton has 1062 states and 1532 transitions. Word has length 87 [2023-04-03 02:52:01,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:52:01,675 INFO L495 AbstractCegarLoop]: Abstraction has 1062 states and 1532 transitions. [2023-04-03 02:52:01,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 4 states have internal predecessors, (84), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:52:01,675 INFO L276 IsEmpty]: Start isEmpty. Operand 1062 states and 1532 transitions. [2023-04-03 02:52:01,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-04-03 02:52:01,677 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:52:01,677 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] [2023-04-03 02:52:01,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-03 02:52:01,677 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:52:01,678 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:52:01,678 INFO L85 PathProgramCache]: Analyzing trace with hash -1595627740, now seen corresponding path program 1 times [2023-04-03 02:52:01,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:52:01,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319326680] [2023-04-03 02:52:01,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:52:01,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:52:01,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:52:01,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:52:01,849 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:52:01,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319326680] [2023-04-03 02:52:01,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319326680] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:52:01,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:52:01,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 02:52:01,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625320808] [2023-04-03 02:52:01,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:52:01,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:52:01,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:52:01,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:52:01,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:52:01,851 INFO L87 Difference]: Start difference. First operand 1062 states and 1532 transitions. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 4 states have internal predecessors, (84), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:52:02,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:52:02,368 INFO L93 Difference]: Finished difference Result 2716 states and 4000 transitions. [2023-04-03 02:52:02,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 02:52:02,369 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 4 states have internal predecessors, (84), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 87 [2023-04-03 02:52:02,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:52:02,376 INFO L225 Difference]: With dead ends: 2716 [2023-04-03 02:52:02,377 INFO L226 Difference]: Without dead ends: 1856 [2023-04-03 02:52:02,379 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-03 02:52:02,380 INFO L413 NwaCegarLoop]: 198 mSDtfsCounter, 693 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 693 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-03 02:52:02,380 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [693 Valid, 309 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-03 02:52:02,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1856 states. [2023-04-03 02:52:02,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1856 to 1854. [2023-04-03 02:52:02,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1854 states, 1850 states have (on average 1.4654054054054053) internal successors, (2711), 1850 states have internal predecessors, (2711), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:52:02,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1854 states to 1854 states and 2714 transitions. [2023-04-03 02:52:02,662 INFO L78 Accepts]: Start accepts. Automaton has 1854 states and 2714 transitions. Word has length 87 [2023-04-03 02:52:02,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:52:02,663 INFO L495 AbstractCegarLoop]: Abstraction has 1854 states and 2714 transitions. [2023-04-03 02:52:02,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 4 states have internal predecessors, (84), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:52:02,663 INFO L276 IsEmpty]: Start isEmpty. Operand 1854 states and 2714 transitions. [2023-04-03 02:52:02,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-04-03 02:52:02,664 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:52:02,664 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:52:02,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-03 02:52:02,665 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:52:02,665 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:52:02,665 INFO L85 PathProgramCache]: Analyzing trace with hash -248730541, now seen corresponding path program 1 times [2023-04-03 02:52:02,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:52:02,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176894945] [2023-04-03 02:52:02,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:52:02,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:52:02,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:52:02,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:52:02,811 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:52:02,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176894945] [2023-04-03 02:52:02,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176894945] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:52:02,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:52:02,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 02:52:02,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812873676] [2023-04-03 02:52:02,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:52:02,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:52:02,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:52:02,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:52:02,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:52:02,814 INFO L87 Difference]: Start difference. First operand 1854 states and 2714 transitions. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 4 states have internal predecessors, (84), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:52:03,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:52:03,581 INFO L93 Difference]: Finished difference Result 5133 states and 7609 transitions. [2023-04-03 02:52:03,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 02:52:03,582 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 4 states have internal predecessors, (84), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 87 [2023-04-03 02:52:03,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:52:03,596 INFO L225 Difference]: With dead ends: 5133 [2023-04-03 02:52:03,596 INFO L226 Difference]: Without dead ends: 3440 [2023-04-03 02:52:03,601 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-03 02:52:03,602 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 663 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 663 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-03 02:52:03,602 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [663 Valid, 308 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-03 02:52:03,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3440 states. [2023-04-03 02:52:04,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3440 to 3438. [2023-04-03 02:52:04,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3438 states, 3434 states have (on average 1.474956319161328) internal successors, (5065), 3434 states have internal predecessors, (5065), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:52:04,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3438 states to 3438 states and 5068 transitions. [2023-04-03 02:52:04,072 INFO L78 Accepts]: Start accepts. Automaton has 3438 states and 5068 transitions. Word has length 87 [2023-04-03 02:52:04,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:52:04,073 INFO L495 AbstractCegarLoop]: Abstraction has 3438 states and 5068 transitions. [2023-04-03 02:52:04,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 4 states have internal predecessors, (84), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:52:04,073 INFO L276 IsEmpty]: Start isEmpty. Operand 3438 states and 5068 transitions. [2023-04-03 02:52:04,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-04-03 02:52:04,074 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:52:04,074 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] [2023-04-03 02:52:04,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-03 02:52:04,075 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:52:04,075 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:52:04,075 INFO L85 PathProgramCache]: Analyzing trace with hash 1111752066, now seen corresponding path program 1 times [2023-04-03 02:52:04,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:52:04,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091491965] [2023-04-03 02:52:04,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:52:04,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:52:04,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:52:04,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:52:04,261 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:52:04,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091491965] [2023-04-03 02:52:04,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091491965] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:52:04,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:52:04,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 02:52:04,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975215136] [2023-04-03 02:52:04,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:52:04,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:52:04,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:52:04,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:52:04,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:52:04,268 INFO L87 Difference]: Start difference. First operand 3438 states and 5068 transitions. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 4 states have internal predecessors, (84), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:52:05,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:52:05,403 INFO L93 Difference]: Finished difference Result 9922 states and 14730 transitions. [2023-04-03 02:52:05,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 02:52:05,404 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 4 states have internal predecessors, (84), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 87 [2023-04-03 02:52:05,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:52:05,431 INFO L225 Difference]: With dead ends: 9922 [2023-04-03 02:52:05,432 INFO L226 Difference]: Without dead ends: 6608 [2023-04-03 02:52:05,440 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-03 02:52:05,441 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 668 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 668 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-03 02:52:05,442 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [668 Valid, 300 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-03 02:52:05,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6608 states. [2023-04-03 02:52:06,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6608 to 6606. [2023-04-03 02:52:06,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6606 states, 6602 states have (on average 1.4759163889730385) internal successors, (9744), 6602 states have internal predecessors, (9744), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:52:06,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6606 states to 6606 states and 9747 transitions. [2023-04-03 02:52:06,388 INFO L78 Accepts]: Start accepts. Automaton has 6606 states and 9747 transitions. Word has length 87 [2023-04-03 02:52:06,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:52:06,389 INFO L495 AbstractCegarLoop]: Abstraction has 6606 states and 9747 transitions. [2023-04-03 02:52:06,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 4 states have internal predecessors, (84), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:52:06,390 INFO L276 IsEmpty]: Start isEmpty. Operand 6606 states and 9747 transitions. [2023-04-03 02:52:06,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-04-03 02:52:06,391 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:52:06,391 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] [2023-04-03 02:52:06,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-03 02:52:06,391 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:52:06,392 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:52:06,392 INFO L85 PathProgramCache]: Analyzing trace with hash -159720783, now seen corresponding path program 1 times [2023-04-03 02:52:06,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:52:06,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451332053] [2023-04-03 02:52:06,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:52:06,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:52:06,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:52:06,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:52:06,547 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:52:06,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451332053] [2023-04-03 02:52:06,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451332053] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:52:06,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:52:06,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 02:52:06,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251493611] [2023-04-03 02:52:06,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:52:06,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:52:06,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:52:06,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:52:06,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:52:06,548 INFO L87 Difference]: Start difference. First operand 6606 states and 9747 transitions. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 4 states have internal predecessors, (84), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:52:08,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:52:08,272 INFO L93 Difference]: Finished difference Result 19456 states and 28815 transitions. [2023-04-03 02:52:08,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 02:52:08,273 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 4 states have internal predecessors, (84), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 87 [2023-04-03 02:52:08,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:52:08,330 INFO L225 Difference]: With dead ends: 19456 [2023-04-03 02:52:08,331 INFO L226 Difference]: Without dead ends: 12944 [2023-04-03 02:52:08,347 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-03 02:52:08,349 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 673 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 673 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-03 02:52:08,351 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [673 Valid, 292 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-03 02:52:08,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12944 states. [2023-04-03 02:52:09,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12944 to 12942. [2023-04-03 02:52:09,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12942 states, 12938 states have (on average 1.470706446127686) internal successors, (19028), 12938 states have internal predecessors, (19028), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:52:09,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12942 states to 12942 states and 19031 transitions. [2023-04-03 02:52:09,985 INFO L78 Accepts]: Start accepts. Automaton has 12942 states and 19031 transitions. Word has length 87 [2023-04-03 02:52:09,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:52:09,985 INFO L495 AbstractCegarLoop]: Abstraction has 12942 states and 19031 transitions. [2023-04-03 02:52:09,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 4 states have internal predecessors, (84), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:52:09,985 INFO L276 IsEmpty]: Start isEmpty. Operand 12942 states and 19031 transitions. [2023-04-03 02:52:09,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-04-03 02:52:09,986 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:52:09,987 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] [2023-04-03 02:52:09,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-03 02:52:09,987 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:52:09,987 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:52:09,987 INFO L85 PathProgramCache]: Analyzing trace with hash 1833449743, now seen corresponding path program 1 times [2023-04-03 02:52:09,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:52:09,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587915357] [2023-04-03 02:52:09,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:52:09,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:52:10,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:52:10,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:52:10,137 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:52:10,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587915357] [2023-04-03 02:52:10,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587915357] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:52:10,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:52:10,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 02:52:10,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273180865] [2023-04-03 02:52:10,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:52:10,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:52:10,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:52:10,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:52:10,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:52:10,139 INFO L87 Difference]: Start difference. First operand 12942 states and 19031 transitions. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 4 states have internal predecessors, (84), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:52:12,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:52:12,760 INFO L93 Difference]: Finished difference Result 36711 states and 54052 transitions. [2023-04-03 02:52:12,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 02:52:12,760 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 4 states have internal predecessors, (84), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 87 [2023-04-03 02:52:12,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:52:12,823 INFO L225 Difference]: With dead ends: 36711 [2023-04-03 02:52:12,823 INFO L226 Difference]: Without dead ends: 23824 [2023-04-03 02:52:12,851 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-03 02:52:12,852 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 689 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 689 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-03 02:52:12,852 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [689 Valid, 276 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-03 02:52:12,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23824 states. [2023-04-03 02:52:15,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23824 to 23822. [2023-04-03 02:52:15,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23822 states, 23818 states have (on average 1.4591485431186497) internal successors, (34754), 23818 states have internal predecessors, (34754), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:52:15,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23822 states to 23822 states and 34757 transitions. [2023-04-03 02:52:15,489 INFO L78 Accepts]: Start accepts. Automaton has 23822 states and 34757 transitions. Word has length 87 [2023-04-03 02:52:15,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:52:15,489 INFO L495 AbstractCegarLoop]: Abstraction has 23822 states and 34757 transitions. [2023-04-03 02:52:15,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 4 states have internal predecessors, (84), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:52:15,490 INFO L276 IsEmpty]: Start isEmpty. Operand 23822 states and 34757 transitions. [2023-04-03 02:52:15,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-04-03 02:52:15,491 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:52:15,491 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] [2023-04-03 02:52:15,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-03 02:52:15,492 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:52:15,492 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:52:15,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1347900984, now seen corresponding path program 1 times [2023-04-03 02:52:15,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:52:15,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099121137] [2023-04-03 02:52:15,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:52:15,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:52:15,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:52:17,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:52:17,880 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:52:17,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099121137] [2023-04-03 02:52:17,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099121137] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:52:17,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:52:17,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2023-04-03 02:52:17,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155316591] [2023-04-03 02:52:17,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:52:17,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-04-03 02:52:17,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:52:17,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-04-03 02:52:17,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2023-04-03 02:52:17,882 INFO L87 Difference]: Start difference. First operand 23822 states and 34757 transitions. Second operand has 20 states, 20 states have (on average 4.25) internal successors, (85), 20 states have internal predecessors, (85), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:52:25,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:52:25,812 INFO L93 Difference]: Finished difference Result 56495 states and 82238 transitions. [2023-04-03 02:52:25,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-04-03 02:52:25,813 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.25) internal successors, (85), 20 states have internal predecessors, (85), 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 88 [2023-04-03 02:52:25,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:52:25,957 INFO L225 Difference]: With dead ends: 56495 [2023-04-03 02:52:25,957 INFO L226 Difference]: Without dead ends: 56493 [2023-04-03 02:52:25,979 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=291, Invalid=831, Unknown=0, NotChecked=0, Total=1122 [2023-04-03 02:52:25,981 INFO L413 NwaCegarLoop]: 311 mSDtfsCounter, 1647 mSDsluCounter, 2097 mSDsCounter, 0 mSdLazyCounter, 973 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1647 SdHoareTripleChecker+Valid, 2408 SdHoareTripleChecker+Invalid, 1008 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 973 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-03 02:52:25,981 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1647 Valid, 2408 Invalid, 1008 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 973 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-03 02:52:26,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56493 states. [2023-04-03 02:52:31,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56493 to 43696. [2023-04-03 02:52:31,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43696 states, 43692 states have (on average 1.4526686807653575) internal successors, (63470), 43692 states have internal predecessors, (63470), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:52:31,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43696 states to 43696 states and 63473 transitions. [2023-04-03 02:52:31,980 INFO L78 Accepts]: Start accepts. Automaton has 43696 states and 63473 transitions. Word has length 88 [2023-04-03 02:52:31,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:52:31,980 INFO L495 AbstractCegarLoop]: Abstraction has 43696 states and 63473 transitions. [2023-04-03 02:52:31,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.25) internal successors, (85), 20 states have internal predecessors, (85), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:52:31,980 INFO L276 IsEmpty]: Start isEmpty. Operand 43696 states and 63473 transitions. [2023-04-03 02:52:31,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-04-03 02:52:31,982 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:52:31,982 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] [2023-04-03 02:52:31,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-03 02:52:31,982 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:52:31,982 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:52:31,983 INFO L85 PathProgramCache]: Analyzing trace with hash -2106996664, now seen corresponding path program 1 times [2023-04-03 02:52:31,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:52:31,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347397567] [2023-04-03 02:52:31,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:52:31,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:52:32,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:52:34,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:52:34,531 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:52:34,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347397567] [2023-04-03 02:52:34,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347397567] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:52:34,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:52:34,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2023-04-03 02:52:34,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024265125] [2023-04-03 02:52:34,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:52:34,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-04-03 02:52:34,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:52:34,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-04-03 02:52:34,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2023-04-03 02:52:34,534 INFO L87 Difference]: Start difference. First operand 43696 states and 63473 transitions. Second operand has 26 states, 26 states have (on average 3.269230769230769) internal successors, (85), 25 states have internal predecessors, (85), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:52:47,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:52:47,456 INFO L93 Difference]: Finished difference Result 76530 states and 111168 transitions. [2023-04-03 02:52:47,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-04-03 02:52:47,457 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.269230769230769) internal successors, (85), 25 states have internal predecessors, (85), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 88 [2023-04-03 02:52:47,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:52:47,667 INFO L225 Difference]: With dead ends: 76530 [2023-04-03 02:52:47,668 INFO L226 Difference]: Without dead ends: 76528 [2023-04-03 02:52:47,698 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=500, Invalid=1570, Unknown=0, NotChecked=0, Total=2070 [2023-04-03 02:52:47,699 INFO L413 NwaCegarLoop]: 324 mSDtfsCounter, 2168 mSDsluCounter, 2637 mSDsCounter, 0 mSdLazyCounter, 3456 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2168 SdHoareTripleChecker+Valid, 2961 SdHoareTripleChecker+Invalid, 3495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 3456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-04-03 02:52:47,699 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2168 Valid, 2961 Invalid, 3495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 3456 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-04-03 02:52:47,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76528 states. [2023-04-03 02:52:54,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76528 to 43727. [2023-04-03 02:52:54,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43727 states, 43723 states have (on average 1.4525307046634495) internal successors, (63509), 43723 states have internal predecessors, (63509), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:52:54,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43727 states to 43727 states and 63512 transitions. [2023-04-03 02:52:54,836 INFO L78 Accepts]: Start accepts. Automaton has 43727 states and 63512 transitions. Word has length 88 [2023-04-03 02:52:54,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:52:54,836 INFO L495 AbstractCegarLoop]: Abstraction has 43727 states and 63512 transitions. [2023-04-03 02:52:54,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.269230769230769) internal successors, (85), 25 states have internal predecessors, (85), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:52:54,836 INFO L276 IsEmpty]: Start isEmpty. Operand 43727 states and 63512 transitions. [2023-04-03 02:52:54,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-04-03 02:52:54,838 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:52:54,838 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] [2023-04-03 02:52:54,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-03 02:52:54,838 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:52:54,838 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:52:54,839 INFO L85 PathProgramCache]: Analyzing trace with hash 337584296, now seen corresponding path program 1 times [2023-04-03 02:52:54,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:52:54,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381082554] [2023-04-03 02:52:54,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:52:54,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:52:54,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:52:57,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:52:57,334 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:52:57,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381082554] [2023-04-03 02:52:57,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381082554] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:52:57,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:52:57,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2023-04-03 02:52:57,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413667709] [2023-04-03 02:52:57,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:52:57,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-04-03 02:52:57,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:52:57,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-04-03 02:52:57,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2023-04-03 02:52:57,336 INFO L87 Difference]: Start difference. First operand 43727 states and 63512 transitions. Second operand has 26 states, 26 states have (on average 3.269230769230769) internal successors, (85), 25 states have internal predecessors, (85), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:53:07,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:53:07,397 INFO L93 Difference]: Finished difference Result 60464 states and 87617 transitions. [2023-04-03 02:53:07,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-04-03 02:53:07,397 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.269230769230769) internal successors, (85), 25 states have internal predecessors, (85), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 88 [2023-04-03 02:53:07,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:53:07,516 INFO L225 Difference]: With dead ends: 60464 [2023-04-03 02:53:07,516 INFO L226 Difference]: Without dead ends: 55598 [2023-04-03 02:53:07,545 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=412, Invalid=1480, Unknown=0, NotChecked=0, Total=1892 [2023-04-03 02:53:07,546 INFO L413 NwaCegarLoop]: 262 mSDtfsCounter, 1746 mSDsluCounter, 1577 mSDsCounter, 0 mSdLazyCounter, 2099 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1746 SdHoareTripleChecker+Valid, 1839 SdHoareTripleChecker+Invalid, 2138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 2099 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:53:07,546 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1746 Valid, 1839 Invalid, 2138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 2099 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-04-03 02:53:07,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55598 states. [2023-04-03 02:53:14,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55598 to 43747. [2023-04-03 02:53:14,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43747 states, 43743 states have (on average 1.452392382781245) internal successors, (63532), 43743 states have internal predecessors, (63532), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:53:14,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43747 states to 43747 states and 63535 transitions. [2023-04-03 02:53:14,394 INFO L78 Accepts]: Start accepts. Automaton has 43747 states and 63535 transitions. Word has length 88 [2023-04-03 02:53:14,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:53:14,394 INFO L495 AbstractCegarLoop]: Abstraction has 43747 states and 63535 transitions. [2023-04-03 02:53:14,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.269230769230769) internal successors, (85), 25 states have internal predecessors, (85), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:53:14,394 INFO L276 IsEmpty]: Start isEmpty. Operand 43747 states and 63535 transitions. [2023-04-03 02:53:14,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-04-03 02:53:14,395 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:53:14,395 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] [2023-04-03 02:53:14,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-03 02:53:14,395 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:53:14,396 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:53:14,396 INFO L85 PathProgramCache]: Analyzing trace with hash 421574920, now seen corresponding path program 1 times [2023-04-03 02:53:14,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:53:14,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073999159] [2023-04-03 02:53:14,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:53:14,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:53:14,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:53:15,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:53:15,896 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:53:15,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073999159] [2023-04-03 02:53:15,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073999159] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:53:15,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:53:15,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2023-04-03 02:53:15,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837488974] [2023-04-03 02:53:15,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:53:15,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-04-03 02:53:15,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:53:15,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-04-03 02:53:15,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2023-04-03 02:53:15,898 INFO L87 Difference]: Start difference. First operand 43747 states and 63535 transitions. Second operand has 21 states, 21 states have (on average 4.0476190476190474) internal successors, (85), 21 states have internal predecessors, (85), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:53:26,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:53:26,048 INFO L93 Difference]: Finished difference Result 65845 states and 95509 transitions. [2023-04-03 02:53:26,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-04-03 02:53:26,049 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.0476190476190474) internal successors, (85), 21 states have internal predecessors, (85), 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 88 [2023-04-03 02:53:26,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:53:26,168 INFO L225 Difference]: With dead ends: 65845 [2023-04-03 02:53:26,168 INFO L226 Difference]: Without dead ends: 56307 [2023-04-03 02:53:26,199 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=296, Invalid=894, Unknown=0, NotChecked=0, Total=1190 [2023-04-03 02:53:26,199 INFO L413 NwaCegarLoop]: 419 mSDtfsCounter, 1262 mSDsluCounter, 3869 mSDsCounter, 0 mSdLazyCounter, 1552 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1262 SdHoareTripleChecker+Valid, 4288 SdHoareTripleChecker+Invalid, 1594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 1552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-04-03 02:53:26,199 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1262 Valid, 4288 Invalid, 1594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 1552 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-04-03 02:53:26,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56307 states. [2023-04-03 02:53:34,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56307 to 50347. [2023-04-03 02:53:34,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50347 states, 50343 states have (on average 1.448781359871283) internal successors, (72936), 50343 states have internal predecessors, (72936), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:53:34,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50347 states to 50347 states and 72939 transitions. [2023-04-03 02:53:34,274 INFO L78 Accepts]: Start accepts. Automaton has 50347 states and 72939 transitions. Word has length 88 [2023-04-03 02:53:34,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:53:34,275 INFO L495 AbstractCegarLoop]: Abstraction has 50347 states and 72939 transitions. [2023-04-03 02:53:34,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.0476190476190474) internal successors, (85), 21 states have internal predecessors, (85), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:53:34,275 INFO L276 IsEmpty]: Start isEmpty. Operand 50347 states and 72939 transitions. [2023-04-03 02:53:34,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-04-03 02:53:34,278 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:53:34,278 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] [2023-04-03 02:53:34,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-04-03 02:53:34,278 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:53:34,278 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:53:34,279 INFO L85 PathProgramCache]: Analyzing trace with hash -334065304, now seen corresponding path program 1 times [2023-04-03 02:53:34,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:53:34,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098493442] [2023-04-03 02:53:34,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:53:34,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:53:34,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:53:35,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:53:35,756 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:53:35,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098493442] [2023-04-03 02:53:35,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098493442] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:53:35,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:53:35,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2023-04-03 02:53:35,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087219189] [2023-04-03 02:53:35,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:53:35,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-04-03 02:53:35,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:53:35,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-04-03 02:53:35,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2023-04-03 02:53:35,759 INFO L87 Difference]: Start difference. First operand 50347 states and 72939 transitions. Second operand has 21 states, 21 states have (on average 4.0476190476190474) internal successors, (85), 21 states have internal predecessors, (85), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:53:48,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:53:48,883 INFO L93 Difference]: Finished difference Result 85612 states and 123860 transitions. [2023-04-03 02:53:48,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-04-03 02:53:48,883 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.0476190476190474) internal successors, (85), 21 states have internal predecessors, (85), 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 88 [2023-04-03 02:53:48,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:53:49,030 INFO L225 Difference]: With dead ends: 85612 [2023-04-03 02:53:49,030 INFO L226 Difference]: Without dead ends: 75754 [2023-04-03 02:53:49,058 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=273, Invalid=849, Unknown=0, NotChecked=0, Total=1122 [2023-04-03 02:53:49,058 INFO L413 NwaCegarLoop]: 423 mSDtfsCounter, 1237 mSDsluCounter, 2299 mSDsCounter, 0 mSdLazyCounter, 894 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1237 SdHoareTripleChecker+Valid, 2722 SdHoareTripleChecker+Invalid, 928 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 894 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-03 02:53:49,059 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1237 Valid, 2722 Invalid, 928 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 894 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-03 02:53:49,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75754 states. [2023-04-03 02:53:59,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75754 to 63630. [2023-04-03 02:53:59,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63630 states, 63626 states have (on average 1.4454939804482445) internal successors, (91971), 63626 states have internal predecessors, (91971), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:53:59,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63630 states to 63630 states and 91974 transitions. [2023-04-03 02:53:59,410 INFO L78 Accepts]: Start accepts. Automaton has 63630 states and 91974 transitions. Word has length 88 [2023-04-03 02:53:59,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:53:59,410 INFO L495 AbstractCegarLoop]: Abstraction has 63630 states and 91974 transitions. [2023-04-03 02:53:59,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.0476190476190474) internal successors, (85), 21 states have internal predecessors, (85), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:53:59,410 INFO L276 IsEmpty]: Start isEmpty. Operand 63630 states and 91974 transitions. [2023-04-03 02:53:59,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-04-03 02:53:59,412 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:53:59,412 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] [2023-04-03 02:53:59,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-04-03 02:53:59,412 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:53:59,412 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:53:59,412 INFO L85 PathProgramCache]: Analyzing trace with hash 1316946472, now seen corresponding path program 1 times [2023-04-03 02:53:59,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:53:59,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140452389] [2023-04-03 02:53:59,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:53:59,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:53:59,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:54:00,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:54:00,947 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:54:00,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140452389] [2023-04-03 02:54:00,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140452389] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:54:00,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:54:00,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2023-04-03 02:54:00,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260320425] [2023-04-03 02:54:00,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:54:00,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-04-03 02:54:00,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:54:00,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-04-03 02:54:00,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2023-04-03 02:54:00,948 INFO L87 Difference]: Start difference. First operand 63630 states and 91974 transitions. Second operand has 21 states, 21 states have (on average 4.0476190476190474) internal successors, (85), 21 states have internal predecessors, (85), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:54:18,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:54:18,833 INFO L93 Difference]: Finished difference Result 108615 states and 157344 transitions. [2023-04-03 02:54:18,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-04-03 02:54:18,834 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.0476190476190474) internal successors, (85), 21 states have internal predecessors, (85), 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 88 [2023-04-03 02:54:18,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:54:19,073 INFO L225 Difference]: With dead ends: 108615 [2023-04-03 02:54:19,074 INFO L226 Difference]: Without dead ends: 103685 [2023-04-03 02:54:19,112 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=273, Invalid=849, Unknown=0, NotChecked=0, Total=1122 [2023-04-03 02:54:19,112 INFO L413 NwaCegarLoop]: 423 mSDtfsCounter, 1405 mSDsluCounter, 1253 mSDsCounter, 0 mSdLazyCounter, 604 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1405 SdHoareTripleChecker+Valid, 1676 SdHoareTripleChecker+Invalid, 642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-03 02:54:19,112 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1405 Valid, 1676 Invalid, 642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 604 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-03 02:54:19,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103685 states. [2023-04-03 02:54:31,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103685 to 71343. [2023-04-03 02:54:31,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71343 states, 71339 states have (on average 1.4450160501268592) internal successors, (103086), 71339 states have internal predecessors, (103086), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:54:31,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71343 states to 71343 states and 103089 transitions. [2023-04-03 02:54:31,930 INFO L78 Accepts]: Start accepts. Automaton has 71343 states and 103089 transitions. Word has length 88 [2023-04-03 02:54:31,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:54:31,930 INFO L495 AbstractCegarLoop]: Abstraction has 71343 states and 103089 transitions. [2023-04-03 02:54:31,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.0476190476190474) internal successors, (85), 21 states have internal predecessors, (85), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:54:31,931 INFO L276 IsEmpty]: Start isEmpty. Operand 71343 states and 103089 transitions. [2023-04-03 02:54:31,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-04-03 02:54:31,933 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:54:31,933 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] [2023-04-03 02:54:31,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-04-03 02:54:31,933 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:54:31,933 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:54:31,933 INFO L85 PathProgramCache]: Analyzing trace with hash -236672365, now seen corresponding path program 1 times [2023-04-03 02:54:31,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:54:31,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43714016] [2023-04-03 02:54:31,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:54:31,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:54:31,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:54:34,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:54:34,024 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:54:34,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43714016] [2023-04-03 02:54:34,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43714016] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:54:34,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:54:34,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2023-04-03 02:54:34,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384606279] [2023-04-03 02:54:34,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:54:34,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-04-03 02:54:34,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:54:34,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-04-03 02:54:34,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=596, Unknown=0, NotChecked=0, Total=702 [2023-04-03 02:54:34,026 INFO L87 Difference]: Start difference. First operand 71343 states and 103089 transitions. Second operand has 27 states, 27 states have (on average 3.2222222222222223) internal successors, (87), 26 states have internal predecessors, (87), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:54:54,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:54:54,611 INFO L93 Difference]: Finished difference Result 108860 states and 157483 transitions. [2023-04-03 02:54:54,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-04-03 02:54:54,612 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.2222222222222223) internal successors, (87), 26 states have internal predecessors, (87), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 90 [2023-04-03 02:54:54,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:54:54,857 INFO L225 Difference]: With dead ends: 108860 [2023-04-03 02:54:54,857 INFO L226 Difference]: Without dead ends: 108858 [2023-04-03 02:54:54,887 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=473, Invalid=1597, Unknown=0, NotChecked=0, Total=2070 [2023-04-03 02:54:54,887 INFO L413 NwaCegarLoop]: 222 mSDtfsCounter, 2914 mSDsluCounter, 2006 mSDsCounter, 0 mSdLazyCounter, 2556 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2914 SdHoareTripleChecker+Valid, 2228 SdHoareTripleChecker+Invalid, 2602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 2556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-04-03 02:54:54,888 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2914 Valid, 2228 Invalid, 2602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 2556 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-04-03 02:54:54,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108858 states. [2023-04-03 02:55:08,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108858 to 71346. [2023-04-03 02:55:08,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71346 states, 71342 states have (on average 1.4449973367721678) internal successors, (103089), 71342 states have internal predecessors, (103089), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:55:08,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71346 states to 71346 states and 103092 transitions. [2023-04-03 02:55:08,484 INFO L78 Accepts]: Start accepts. Automaton has 71346 states and 103092 transitions. Word has length 90 [2023-04-03 02:55:08,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:55:08,484 INFO L495 AbstractCegarLoop]: Abstraction has 71346 states and 103092 transitions. [2023-04-03 02:55:08,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.2222222222222223) internal successors, (87), 26 states have internal predecessors, (87), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:55:08,484 INFO L276 IsEmpty]: Start isEmpty. Operand 71346 states and 103092 transitions. [2023-04-03 02:55:08,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-04-03 02:55:08,486 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:55:08,486 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] [2023-04-03 02:55:08,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-04-03 02:55:08,486 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:55:08,486 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:55:08,486 INFO L85 PathProgramCache]: Analyzing trace with hash -2087058701, now seen corresponding path program 1 times [2023-04-03 02:55:08,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:55:08,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483882257] [2023-04-03 02:55:08,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:55:08,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:55:08,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:55:09,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:55:09,880 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:55:09,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483882257] [2023-04-03 02:55:09,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483882257] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:55:09,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:55:09,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2023-04-03 02:55:09,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955193803] [2023-04-03 02:55:09,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:55:09,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-04-03 02:55:09,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:55:09,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-04-03 02:55:09,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2023-04-03 02:55:09,881 INFO L87 Difference]: Start difference. First operand 71346 states and 103092 transitions. Second operand has 21 states, 21 states have (on average 4.142857142857143) internal successors, (87), 21 states have internal predecessors, (87), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:55:33,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:55:33,363 INFO L93 Difference]: Finished difference Result 130537 states and 188737 transitions. [2023-04-03 02:55:33,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-04-03 02:55:33,364 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.142857142857143) internal successors, (87), 21 states have internal predecessors, (87), 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 90 [2023-04-03 02:55:33,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:55:33,650 INFO L225 Difference]: With dead ends: 130537 [2023-04-03 02:55:33,650 INFO L226 Difference]: Without dead ends: 120679 [2023-04-03 02:55:33,694 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=273, Invalid=849, Unknown=0, NotChecked=0, Total=1122 [2023-04-03 02:55:33,694 INFO L413 NwaCegarLoop]: 305 mSDtfsCounter, 1462 mSDsluCounter, 2208 mSDsCounter, 0 mSdLazyCounter, 856 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1462 SdHoareTripleChecker+Valid, 2513 SdHoareTripleChecker+Invalid, 898 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 856 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-03 02:55:33,695 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1462 Valid, 2513 Invalid, 898 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 856 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-03 02:55:33,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120679 states. [2023-04-03 02:55:47,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120679 to 71366. [2023-04-03 02:55:47,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71366 states, 71362 states have (on average 1.4449006474033799) internal successors, (103111), 71362 states have internal predecessors, (103111), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:55:47,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71366 states to 71366 states and 103114 transitions. [2023-04-03 02:55:47,801 INFO L78 Accepts]: Start accepts. Automaton has 71366 states and 103114 transitions. Word has length 90 [2023-04-03 02:55:47,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:55:47,801 INFO L495 AbstractCegarLoop]: Abstraction has 71366 states and 103114 transitions. [2023-04-03 02:55:47,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.142857142857143) internal successors, (87), 21 states have internal predecessors, (87), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:55:47,801 INFO L276 IsEmpty]: Start isEmpty. Operand 71366 states and 103114 transitions. [2023-04-03 02:55:47,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-04-03 02:55:47,803 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:55:47,803 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] [2023-04-03 02:55:47,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-04-03 02:55:47,803 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:55:47,803 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:55:47,804 INFO L85 PathProgramCache]: Analyzing trace with hash -2003068077, now seen corresponding path program 1 times [2023-04-03 02:55:47,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:55:47,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722393737] [2023-04-03 02:55:47,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:55:47,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:55:47,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:55:49,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:55:49,122 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:55:49,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722393737] [2023-04-03 02:55:49,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722393737] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:55:49,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:55:49,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2023-04-03 02:55:49,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045695547] [2023-04-03 02:55:49,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:55:49,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-04-03 02:55:49,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:55:49,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-04-03 02:55:49,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2023-04-03 02:55:49,124 INFO L87 Difference]: Start difference. First operand 71366 states and 103114 transitions. Second operand has 22 states, 22 states have (on average 3.9545454545454546) internal successors, (87), 22 states have internal predecessors, (87), 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)