/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/seq-mthreaded/pals_floodmax.4.4.ufo.BOUNDED-8.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 06:14:57,677 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 06:14:57,678 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 06:14:57,699 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 06:14:57,700 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 06:14:57,700 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 06:14:57,701 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 06:14:57,702 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 06:14:57,703 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 06:14:57,704 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 06:14:57,706 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 06:14:57,709 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 06:14:57,709 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 06:14:57,715 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 06:14:57,717 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 06:14:57,719 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 06:14:57,719 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 06:14:57,720 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 06:14:57,720 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 06:14:57,721 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 06:14:57,722 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 06:14:57,725 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 06:14:57,725 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 06:14:57,726 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 06:14:57,728 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 06:14:57,728 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 06:14:57,728 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 06:14:57,728 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 06:14:57,728 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 06:14:57,729 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 06:14:57,729 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 06:14:57,730 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 06:14:57,730 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 06:14:57,730 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 06:14:57,731 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 06:14:57,731 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 06:14:57,731 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 06:14:57,731 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 06:14:57,732 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 06:14:57,732 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 06:14:57,732 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 06:14:57,738 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 06:14:57,758 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 06:14:57,758 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 06:14:57,758 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 06:14:57,758 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 06:14:57,759 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 06:14:57,759 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 06:14:57,759 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 06:14:57,759 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 06:14:57,759 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 06:14:57,759 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 06:14:57,759 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 06:14:57,759 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 06:14:57,759 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 06:14:57,759 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 06:14:57,760 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 06:14:57,760 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 06:14:57,760 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 06:14:57,760 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 06:14:57,760 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 06:14:57,760 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 06:14:57,760 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 06:14:57,761 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 06:14:57,761 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 06:14:57,761 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 06:14:57,761 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 06:14:57,761 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 06:14:57,761 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 06:14:57,761 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 06:14:57,761 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 06:14:57,761 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 06:14:57,761 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 06:14:57,761 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 06:14:57,761 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 06:14:57,762 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 06:14:57,762 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 06:14:57,762 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 06:14:57,762 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 06:14:57,762 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 06:14:57,762 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 06:14:57,762 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 06:14:57,762 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 06:14:57,762 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 06:14:57,896 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 06:14:57,909 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 06:14:57,910 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 06:14:57,911 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 06:14:57,911 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 06:14:57,912 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_floodmax.4.4.ufo.BOUNDED-8.pals.c [2023-04-01 06:14:58,812 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 06:14:59,034 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 06:14:59,034 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_floodmax.4.4.ufo.BOUNDED-8.pals.c [2023-04-01 06:14:59,049 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/37354f9e1/6f8cb5918b2643a7bba84c9856cb2f67/FLAG8a1f42a02 [2023-04-01 06:14:59,058 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/37354f9e1/6f8cb5918b2643a7bba84c9856cb2f67 [2023-04-01 06:14:59,060 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 06:14:59,061 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 06:14:59,062 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 06:14:59,062 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 06:14:59,064 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 06:14:59,064 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 06:14:59" (1/1) ... [2023-04-01 06:14:59,065 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@278118d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:14:59, skipping insertion in model container [2023-04-01 06:14:59,065 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 06:14:59" (1/1) ... [2023-04-01 06:14:59,070 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 06:14:59,090 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 06:14:59,268 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_floodmax.4.4.ufo.BOUNDED-8.pals.c[28194,28207] [2023-04-01 06:14:59,271 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 06:14:59,285 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 06:14:59,363 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_floodmax.4.4.ufo.BOUNDED-8.pals.c[28194,28207] [2023-04-01 06:14:59,363 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 06:14:59,375 INFO L208 MainTranslator]: Completed translation [2023-04-01 06:14:59,375 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:14:59 WrapperNode [2023-04-01 06:14:59,375 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 06:14:59,376 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 06:14:59,376 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 06:14:59,376 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 06:14:59,384 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:14:59" (1/1) ... [2023-04-01 06:14:59,384 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:14:59" (1/1) ... [2023-04-01 06:14:59,395 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:14:59" (1/1) ... [2023-04-01 06:14:59,396 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:14:59" (1/1) ... [2023-04-01 06:14:59,415 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:14:59" (1/1) ... [2023-04-01 06:14:59,426 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:14:59" (1/1) ... [2023-04-01 06:14:59,428 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:14:59" (1/1) ... [2023-04-01 06:14:59,431 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:14:59" (1/1) ... [2023-04-01 06:14:59,435 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 06:14:59,435 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 06:14:59,436 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 06:14:59,436 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 06:14:59,436 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:14:59" (1/1) ... [2023-04-01 06:14:59,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 06:14:59,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 06:14:59,458 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 06:14:59,466 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 06:14:59,505 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 06:14:59,506 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 06:14:59,506 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 06:14:59,506 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 06:14:59,506 INFO L138 BoogieDeclarations]: Found implementation of procedure node1 [2023-04-01 06:14:59,506 INFO L138 BoogieDeclarations]: Found implementation of procedure node2 [2023-04-01 06:14:59,506 INFO L138 BoogieDeclarations]: Found implementation of procedure node3 [2023-04-01 06:14:59,506 INFO L138 BoogieDeclarations]: Found implementation of procedure node4 [2023-04-01 06:14:59,506 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2023-04-01 06:14:59,506 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2023-04-01 06:14:59,506 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 06:14:59,506 INFO L138 BoogieDeclarations]: Found implementation of procedure assert [2023-04-01 06:14:59,506 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 06:14:59,506 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 06:14:59,507 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 06:14:59,507 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 06:14:59,507 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-01 06:14:59,507 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-01 06:14:59,507 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-01 06:14:59,507 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 06:14:59,507 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-01 06:14:59,507 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-01 06:14:59,507 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-01 06:14:59,507 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-01 06:14:59,507 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-01 06:14:59,507 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2023-04-01 06:14:59,507 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-01 06:14:59,508 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-01 06:14:59,508 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 06:14:59,508 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 06:14:59,508 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 06:14:59,508 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 06:14:59,508 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 06:14:59,508 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 06:14:59,508 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 06:14:59,668 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 06:14:59,670 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 06:15:00,348 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 06:15:00,852 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 06:15:00,852 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 06:15:00,854 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 06:15:00 BoogieIcfgContainer [2023-04-01 06:15:00,855 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 06:15:00,856 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 06:15:00,856 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 06:15:00,858 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 06:15:00,858 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 06:14:59" (1/3) ... [2023-04-01 06:15:00,859 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@229ec894 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 06:15:00, skipping insertion in model container [2023-04-01 06:15:00,859 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:14:59" (2/3) ... [2023-04-01 06:15:00,859 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@229ec894 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 06:15:00, skipping insertion in model container [2023-04-01 06:15:00,859 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 06:15:00" (3/3) ... [2023-04-01 06:15:00,860 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_floodmax.4.4.ufo.BOUNDED-8.pals.c [2023-04-01 06:15:00,873 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 06:15:00,873 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 06:15:00,906 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 06:15:00,910 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;@19720c5e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 06:15:00,911 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 06:15:00,915 INFO L276 IsEmpty]: Start isEmpty. Operand has 175 states, 153 states have (on average 1.5620915032679739) internal successors, (239), 154 states have internal predecessors, (239), 10 states have call successors, (10), 10 states have call predecessors, (10), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-04-01 06:15:00,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-04-01 06:15:00,926 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:15:00,927 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:15:00,928 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:15:00,933 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:15:00,933 INFO L85 PathProgramCache]: Analyzing trace with hash 2104542807, now seen corresponding path program 1 times [2023-04-01 06:15:00,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:15:00,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325311470] [2023-04-01 06:15:00,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:15:00,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:15:01,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:15:05,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:15:05,423 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:15:05,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325311470] [2023-04-01 06:15:05,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325311470] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:15:05,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:15:05,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2023-04-01 06:15:05,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611119711] [2023-04-01 06:15:05,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:15:05,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-04-01 06:15:05,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:15:05,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-04-01 06:15:05,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2023-04-01 06:15:05,472 INFO L87 Difference]: Start difference. First operand has 175 states, 153 states have (on average 1.5620915032679739) internal successors, (239), 154 states have internal predecessors, (239), 10 states have call successors, (10), 10 states have call predecessors, (10), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 20 states, 10 states have (on average 6.7) internal successors, (67), 12 states have internal predecessors, (67), 8 states have call successors, (10), 6 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2023-04-01 06:15:07,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:15:07,186 INFO L93 Difference]: Finished difference Result 282 states and 398 transitions. [2023-04-01 06:15:07,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-04-01 06:15:07,189 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 10 states have (on average 6.7) internal successors, (67), 12 states have internal predecessors, (67), 8 states have call successors, (10), 6 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) Word has length 85 [2023-04-01 06:15:07,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:15:07,196 INFO L225 Difference]: With dead ends: 282 [2023-04-01 06:15:07,196 INFO L226 Difference]: Without dead ends: 228 [2023-04-01 06:15:07,199 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=320, Invalid=1012, Unknown=0, NotChecked=0, Total=1332 [2023-04-01 06:15:07,201 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 1937 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 2136 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1940 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 2307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 2136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-04-01 06:15:07,202 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1940 Valid, 165 Invalid, 2307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 2136 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-04-01 06:15:07,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2023-04-01 06:15:07,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 202. [2023-04-01 06:15:07,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 172 states have (on average 1.5465116279069768) internal successors, (266), 173 states have internal predecessors, (266), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (15), 13 states have call predecessors, (15), 14 states have call successors, (15) [2023-04-01 06:15:07,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 296 transitions. [2023-04-01 06:15:07,262 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 296 transitions. Word has length 85 [2023-04-01 06:15:07,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:15:07,262 INFO L495 AbstractCegarLoop]: Abstraction has 202 states and 296 transitions. [2023-04-01 06:15:07,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 10 states have (on average 6.7) internal successors, (67), 12 states have internal predecessors, (67), 8 states have call successors, (10), 6 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2023-04-01 06:15:07,263 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 296 transitions. [2023-04-01 06:15:07,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-04-01 06:15:07,265 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:15:07,265 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] [2023-04-01 06:15:07,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 06:15:07,266 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:15:07,266 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:15:07,266 INFO L85 PathProgramCache]: Analyzing trace with hash 1205989878, now seen corresponding path program 1 times [2023-04-01 06:15:07,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:15:07,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336448542] [2023-04-01 06:15:07,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:15:07,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:15:07,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:15:09,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:15:09,284 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:15:09,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336448542] [2023-04-01 06:15:09,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336448542] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:15:09,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:15:09,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-01 06:15:09,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731625214] [2023-04-01 06:15:09,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:15:09,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 06:15:09,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:15:09,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 06:15:09,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-04-01 06:15:09,287 INFO L87 Difference]: Start difference. First operand 202 states and 296 transitions. Second operand has 11 states, 7 states have (on average 9.714285714285714) internal successors, (68), 9 states have internal predecessors, (68), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-01 06:15:10,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:15:10,193 INFO L93 Difference]: Finished difference Result 281 states and 396 transitions. [2023-04-01 06:15:10,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 06:15:10,194 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 9.714285714285714) internal successors, (68), 9 states have internal predecessors, (68), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 86 [2023-04-01 06:15:10,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:15:10,196 INFO L225 Difference]: With dead ends: 281 [2023-04-01 06:15:10,196 INFO L226 Difference]: Without dead ends: 235 [2023-04-01 06:15:10,197 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2023-04-01 06:15:10,197 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 311 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 1794 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 1830 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1794 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-04-01 06:15:10,198 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [314 Valid, 106 Invalid, 1830 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1794 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-04-01 06:15:10,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2023-04-01 06:15:10,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 202. [2023-04-01 06:15:10,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 172 states have (on average 1.5406976744186047) internal successors, (265), 173 states have internal predecessors, (265), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2023-04-01 06:15:10,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 294 transitions. [2023-04-01 06:15:10,223 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 294 transitions. Word has length 86 [2023-04-01 06:15:10,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:15:10,224 INFO L495 AbstractCegarLoop]: Abstraction has 202 states and 294 transitions. [2023-04-01 06:15:10,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 9.714285714285714) internal successors, (68), 9 states have internal predecessors, (68), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-01 06:15:10,224 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 294 transitions. [2023-04-01 06:15:10,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-04-01 06:15:10,231 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:15:10,231 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] [2023-04-01 06:15:10,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 06:15:10,231 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:15:10,232 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:15:10,232 INFO L85 PathProgramCache]: Analyzing trace with hash 227364256, now seen corresponding path program 1 times [2023-04-01 06:15:10,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:15:10,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029923535] [2023-04-01 06:15:10,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:15:10,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:15:10,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:15:12,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:15:12,008 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:15:12,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029923535] [2023-04-01 06:15:12,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029923535] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:15:12,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:15:12,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-01 06:15:12,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140811241] [2023-04-01 06:15:12,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:15:12,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 06:15:12,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:15:12,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 06:15:12,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-04-01 06:15:12,012 INFO L87 Difference]: Start difference. First operand 202 states and 294 transitions. Second operand has 11 states, 7 states have (on average 9.857142857142858) internal successors, (69), 9 states have internal predecessors, (69), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-01 06:15:12,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:15:12,893 INFO L93 Difference]: Finished difference Result 275 states and 380 transitions. [2023-04-01 06:15:12,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 06:15:12,894 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 9.857142857142858) internal successors, (69), 9 states have internal predecessors, (69), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 87 [2023-04-01 06:15:12,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:15:12,895 INFO L225 Difference]: With dead ends: 275 [2023-04-01 06:15:12,895 INFO L226 Difference]: Without dead ends: 234 [2023-04-01 06:15:12,896 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2023-04-01 06:15:12,896 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 315 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 1855 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 1881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 1855 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-04-01 06:15:12,897 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [320 Valid, 112 Invalid, 1881 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 1855 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-04-01 06:15:12,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2023-04-01 06:15:12,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 202. [2023-04-01 06:15:12,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 172 states have (on average 1.5348837209302326) internal successors, (264), 173 states have internal predecessors, (264), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2023-04-01 06:15:12,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 293 transitions. [2023-04-01 06:15:12,911 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 293 transitions. Word has length 87 [2023-04-01 06:15:12,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:15:12,913 INFO L495 AbstractCegarLoop]: Abstraction has 202 states and 293 transitions. [2023-04-01 06:15:12,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 9.857142857142858) internal successors, (69), 9 states have internal predecessors, (69), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-01 06:15:12,913 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 293 transitions. [2023-04-01 06:15:12,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-04-01 06:15:12,915 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:15:12,915 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] [2023-04-01 06:15:12,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 06:15:12,916 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:15:12,919 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:15:12,919 INFO L85 PathProgramCache]: Analyzing trace with hash 1061452447, now seen corresponding path program 1 times [2023-04-01 06:15:12,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:15:12,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464869432] [2023-04-01 06:15:12,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:15:12,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:15:12,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:15:14,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:15:14,602 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:15:14,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464869432] [2023-04-01 06:15:14,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464869432] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:15:14,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:15:14,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-01 06:15:14,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541785639] [2023-04-01 06:15:14,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:15:14,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 06:15:14,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:15:14,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 06:15:14,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-04-01 06:15:14,603 INFO L87 Difference]: Start difference. First operand 202 states and 293 transitions. Second operand has 11 states, 7 states have (on average 10.0) internal successors, (70), 9 states have internal predecessors, (70), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-01 06:15:15,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:15:15,507 INFO L93 Difference]: Finished difference Result 281 states and 385 transitions. [2023-04-01 06:15:15,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 06:15:15,509 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 10.0) internal successors, (70), 9 states have internal predecessors, (70), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 88 [2023-04-01 06:15:15,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:15:15,510 INFO L225 Difference]: With dead ends: 281 [2023-04-01 06:15:15,510 INFO L226 Difference]: Without dead ends: 240 [2023-04-01 06:15:15,511 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2023-04-01 06:15:15,511 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 581 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 1813 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 588 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 1871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 1813 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-04-01 06:15:15,512 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [588 Valid, 102 Invalid, 1871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 1813 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-04-01 06:15:15,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2023-04-01 06:15:15,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 202. [2023-04-01 06:15:15,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 172 states have (on average 1.5290697674418605) internal successors, (263), 173 states have internal predecessors, (263), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2023-04-01 06:15:15,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 292 transitions. [2023-04-01 06:15:15,526 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 292 transitions. Word has length 88 [2023-04-01 06:15:15,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:15:15,527 INFO L495 AbstractCegarLoop]: Abstraction has 202 states and 292 transitions. [2023-04-01 06:15:15,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 10.0) internal successors, (70), 9 states have internal predecessors, (70), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-01 06:15:15,527 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 292 transitions. [2023-04-01 06:15:15,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-04-01 06:15:15,527 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:15:15,528 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:15:15,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 06:15:15,528 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:15:15,528 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:15:15,528 INFO L85 PathProgramCache]: Analyzing trace with hash -2039873303, now seen corresponding path program 1 times [2023-04-01 06:15:15,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:15:15,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825106432] [2023-04-01 06:15:15,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:15:15,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:15:15,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:15:17,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:15:17,071 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:15:17,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825106432] [2023-04-01 06:15:17,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825106432] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:15:17,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:15:17,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-01 06:15:17,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916861175] [2023-04-01 06:15:17,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:15:17,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 06:15:17,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:15:17,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 06:15:17,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-04-01 06:15:17,073 INFO L87 Difference]: Start difference. First operand 202 states and 292 transitions. Second operand has 11 states, 7 states have (on average 10.142857142857142) internal successors, (71), 9 states have internal predecessors, (71), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-01 06:15:17,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:15:17,960 INFO L93 Difference]: Finished difference Result 287 states and 390 transitions. [2023-04-01 06:15:17,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 06:15:17,960 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 10.142857142857142) internal successors, (71), 9 states have internal predecessors, (71), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 89 [2023-04-01 06:15:17,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:15:17,961 INFO L225 Difference]: With dead ends: 287 [2023-04-01 06:15:17,961 INFO L226 Difference]: Without dead ends: 246 [2023-04-01 06:15:17,962 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2023-04-01 06:15:17,963 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 587 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 1830 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 596 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 1893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 1830 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-04-01 06:15:17,963 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [596 Valid, 104 Invalid, 1893 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 1830 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-04-01 06:15:17,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2023-04-01 06:15:17,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 202. [2023-04-01 06:15:17,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 172 states have (on average 1.5232558139534884) internal successors, (262), 173 states have internal predecessors, (262), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2023-04-01 06:15:17,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 291 transitions. [2023-04-01 06:15:17,985 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 291 transitions. Word has length 89 [2023-04-01 06:15:17,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:15:17,986 INFO L495 AbstractCegarLoop]: Abstraction has 202 states and 291 transitions. [2023-04-01 06:15:17,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 10.142857142857142) internal successors, (71), 9 states have internal predecessors, (71), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-01 06:15:17,986 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 291 transitions. [2023-04-01 06:15:17,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2023-04-01 06:15:17,986 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:15:17,987 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, 1, 1, 1, 1] [2023-04-01 06:15:17,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 06:15:17,987 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:15:17,987 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:15:17,987 INFO L85 PathProgramCache]: Analyzing trace with hash 416826577, now seen corresponding path program 1 times [2023-04-01 06:15:17,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:15:17,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536933216] [2023-04-01 06:15:17,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:15:17,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:15:18,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:15:20,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:15:20,558 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:15:20,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536933216] [2023-04-01 06:15:20,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536933216] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:15:20,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:15:20,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2023-04-01 06:15:20,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051894000] [2023-04-01 06:15:20,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:15:20,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-04-01 06:15:20,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:15:20,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-04-01 06:15:20,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2023-04-01 06:15:20,560 INFO L87 Difference]: Start difference. First operand 202 states and 291 transitions. Second operand has 21 states, 11 states have (on average 6.636363636363637) internal successors, (73), 13 states have internal predecessors, (73), 8 states have call successors, (10), 6 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2023-04-01 06:15:22,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:15:22,251 INFO L93 Difference]: Finished difference Result 378 states and 508 transitions. [2023-04-01 06:15:22,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-04-01 06:15:22,251 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 11 states have (on average 6.636363636363637) internal successors, (73), 13 states have internal predecessors, (73), 8 states have call successors, (10), 6 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) Word has length 91 [2023-04-01 06:15:22,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:15:22,253 INFO L225 Difference]: With dead ends: 378 [2023-04-01 06:15:22,253 INFO L226 Difference]: Without dead ends: 334 [2023-04-01 06:15:22,254 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=435, Invalid=1457, Unknown=0, NotChecked=0, Total=1892 [2023-04-01 06:15:22,255 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 1445 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 2278 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1450 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 2423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 2278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-04-01 06:15:22,255 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1450 Valid, 265 Invalid, 2423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 2278 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-04-01 06:15:22,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2023-04-01 06:15:22,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 256. [2023-04-01 06:15:22,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 211 states have (on average 1.5023696682464456) internal successors, (317), 215 states have internal predecessors, (317), 21 states have call successors, (21), 21 states have call predecessors, (21), 23 states have return successors, (24), 19 states have call predecessors, (24), 20 states have call successors, (24) [2023-04-01 06:15:22,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 362 transitions. [2023-04-01 06:15:22,288 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 362 transitions. Word has length 91 [2023-04-01 06:15:22,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:15:22,288 INFO L495 AbstractCegarLoop]: Abstraction has 256 states and 362 transitions. [2023-04-01 06:15:22,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 11 states have (on average 6.636363636363637) internal successors, (73), 13 states have internal predecessors, (73), 8 states have call successors, (10), 6 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2023-04-01 06:15:22,288 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 362 transitions. [2023-04-01 06:15:22,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-04-01 06:15:22,289 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:15:22,289 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:15:22,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-01 06:15:22,290 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:15:22,290 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:15:22,290 INFO L85 PathProgramCache]: Analyzing trace with hash -644118890, now seen corresponding path program 1 times [2023-04-01 06:15:22,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:15:22,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139556540] [2023-04-01 06:15:22,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:15:22,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:15:22,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:15:23,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:15:23,062 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:15:23,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139556540] [2023-04-01 06:15:23,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139556540] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:15:23,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:15:23,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-01 06:15:23,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011844239] [2023-04-01 06:15:23,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:15:23,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 06:15:23,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:15:23,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 06:15:23,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2023-04-01 06:15:23,064 INFO L87 Difference]: Start difference. First operand 256 states and 362 transitions. Second operand has 11 states, 7 states have (on average 10.571428571428571) internal successors, (74), 9 states have internal predecessors, (74), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-01 06:15:23,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:15:23,843 INFO L93 Difference]: Finished difference Result 335 states and 459 transitions. [2023-04-01 06:15:23,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 06:15:23,843 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 10.571428571428571) internal successors, (74), 9 states have internal predecessors, (74), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 92 [2023-04-01 06:15:23,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:15:23,847 INFO L225 Difference]: With dead ends: 335 [2023-04-01 06:15:23,847 INFO L226 Difference]: Without dead ends: 236 [2023-04-01 06:15:23,850 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2023-04-01 06:15:23,851 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 299 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 1792 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 1836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1792 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-01 06:15:23,853 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [302 Valid, 105 Invalid, 1836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1792 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-01 06:15:23,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2023-04-01 06:15:23,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 204. [2023-04-01 06:15:23,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 174 states have (on average 1.4885057471264367) internal successors, (259), 175 states have internal predecessors, (259), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2023-04-01 06:15:23,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 288 transitions. [2023-04-01 06:15:23,873 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 288 transitions. Word has length 92 [2023-04-01 06:15:23,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:15:23,874 INFO L495 AbstractCegarLoop]: Abstraction has 204 states and 288 transitions. [2023-04-01 06:15:23,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 10.571428571428571) internal successors, (74), 9 states have internal predecessors, (74), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-01 06:15:23,874 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 288 transitions. [2023-04-01 06:15:23,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-04-01 06:15:23,874 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:15:23,875 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:15:23,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-01 06:15:23,875 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:15:23,875 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:15:23,875 INFO L85 PathProgramCache]: Analyzing trace with hash 578347644, now seen corresponding path program 1 times [2023-04-01 06:15:23,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:15:23,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60100914] [2023-04-01 06:15:23,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:15:23,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:15:24,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:15:26,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:15:26,431 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:15:26,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60100914] [2023-04-01 06:15:26,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60100914] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:15:26,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:15:26,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2023-04-01 06:15:26,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363526070] [2023-04-01 06:15:26,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:15:26,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-04-01 06:15:26,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:15:26,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-04-01 06:15:26,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2023-04-01 06:15:26,434 INFO L87 Difference]: Start difference. First operand 204 states and 288 transitions. Second operand has 21 states, 11 states have (on average 6.909090909090909) internal successors, (76), 13 states have internal predecessors, (76), 8 states have call successors, (10), 6 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2023-04-01 06:15:28,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:15:28,195 INFO L93 Difference]: Finished difference Result 295 states and 393 transitions. [2023-04-01 06:15:28,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-04-01 06:15:28,196 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 11 states have (on average 6.909090909090909) internal successors, (76), 13 states have internal predecessors, (76), 8 states have call successors, (10), 6 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) Word has length 94 [2023-04-01 06:15:28,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:15:28,197 INFO L225 Difference]: With dead ends: 295 [2023-04-01 06:15:28,197 INFO L226 Difference]: Without dead ends: 251 [2023-04-01 06:15:28,198 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=435, Invalid=1457, Unknown=0, NotChecked=0, Total=1892 [2023-04-01 06:15:28,198 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 1312 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 2683 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1315 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 2802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 2683 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-04-01 06:15:28,202 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1315 Valid, 191 Invalid, 2802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 2683 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-04-01 06:15:28,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2023-04-01 06:15:28,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 204. [2023-04-01 06:15:28,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 174 states have (on average 1.4827586206896552) internal successors, (258), 175 states have internal predecessors, (258), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2023-04-01 06:15:28,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 287 transitions. [2023-04-01 06:15:28,220 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 287 transitions. Word has length 94 [2023-04-01 06:15:28,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:15:28,220 INFO L495 AbstractCegarLoop]: Abstraction has 204 states and 287 transitions. [2023-04-01 06:15:28,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 11 states have (on average 6.909090909090909) internal successors, (76), 13 states have internal predecessors, (76), 8 states have call successors, (10), 6 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2023-04-01 06:15:28,221 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 287 transitions. [2023-04-01 06:15:28,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-04-01 06:15:28,221 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:15:28,221 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:15:28,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-01 06:15:28,221 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:15:28,222 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:15:28,222 INFO L85 PathProgramCache]: Analyzing trace with hash -1956576838, now seen corresponding path program 1 times [2023-04-01 06:15:28,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:15:28,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758105050] [2023-04-01 06:15:28,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:15:28,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:15:28,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:15:29,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:15:29,538 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:15:29,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758105050] [2023-04-01 06:15:29,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758105050] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:15:29,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:15:29,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-04-01 06:15:29,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210356437] [2023-04-01 06:15:29,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:15:29,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-01 06:15:29,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:15:29,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-01 06:15:29,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2023-04-01 06:15:29,539 INFO L87 Difference]: Start difference. First operand 204 states and 287 transitions. Second operand has 13 states, 8 states have (on average 9.625) internal successors, (77), 10 states have internal predecessors, (77), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2023-04-01 06:15:29,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:15:29,913 INFO L93 Difference]: Finished difference Result 282 states and 388 transitions. [2023-04-01 06:15:29,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-04-01 06:15:29,913 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 8 states have (on average 9.625) internal successors, (77), 10 states have internal predecessors, (77), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 95 [2023-04-01 06:15:29,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:15:29,914 INFO L225 Difference]: With dead ends: 282 [2023-04-01 06:15:29,914 INFO L226 Difference]: Without dead ends: 240 [2023-04-01 06:15:29,914 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2023-04-01 06:15:29,916 INFO L413 NwaCegarLoop]: 230 mSDtfsCounter, 40 mSDsluCounter, 2466 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 2696 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 06:15:29,916 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 2696 Invalid, 584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 572 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 06:15:29,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2023-04-01 06:15:29,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 212. [2023-04-01 06:15:29,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 179 states have (on average 1.458100558659218) internal successors, (261), 181 states have internal predecessors, (261), 16 states have call successors, (16), 16 states have call predecessors, (16), 16 states have return successors, (16), 14 states have call predecessors, (16), 15 states have call successors, (16) [2023-04-01 06:15:29,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 293 transitions. [2023-04-01 06:15:29,945 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 293 transitions. Word has length 95 [2023-04-01 06:15:29,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:15:29,946 INFO L495 AbstractCegarLoop]: Abstraction has 212 states and 293 transitions. [2023-04-01 06:15:29,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 8 states have (on average 9.625) internal successors, (77), 10 states have internal predecessors, (77), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2023-04-01 06:15:29,946 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 293 transitions. [2023-04-01 06:15:29,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2023-04-01 06:15:29,947 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:15:29,947 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:15:29,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-01 06:15:29,947 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:15:29,948 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:15:29,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1979843270, now seen corresponding path program 1 times [2023-04-01 06:15:29,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:15:29,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116412625] [2023-04-01 06:15:29,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:15:29,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:15:30,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:15:34,539 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 06:15:34,539 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:15:34,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116412625] [2023-04-01 06:15:34,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116412625] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 06:15:34,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667998360] [2023-04-01 06:15:34,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:15:34,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 06:15:34,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 06:15:34,541 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 06:15:34,542 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 06:15:34,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:15:34,853 INFO L262 TraceCheckSpWp]: Trace formula consists of 1584 conjuncts, 98 conjunts are in the unsatisfiable core [2023-04-01 06:15:34,900 INFO L285 TraceCheckSpWp]: Computing forward predicates...