/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 IntervalDomain -i ../sv-benchmarks/c/seq-mthreaded/pals_floodmax.4.ufo.UNBOUNDED.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 00:11:21,602 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 00:11:21,603 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 00:11:21,625 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 00:11:21,626 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 00:11:21,627 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 00:11:21,628 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 00:11:21,629 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 00:11:21,630 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 00:11:21,631 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 00:11:21,632 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 00:11:21,633 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 00:11:21,633 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 00:11:21,634 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 00:11:21,634 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 00:11:21,635 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 00:11:21,636 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 00:11:21,636 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 00:11:21,637 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 00:11:21,639 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 00:11:21,640 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 00:11:21,644 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 00:11:21,644 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 00:11:21,645 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 00:11:21,648 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 00:11:21,648 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 00:11:21,648 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 00:11:21,649 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 00:11:21,649 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 00:11:21,650 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 00:11:21,650 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 00:11:21,651 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 00:11:21,652 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 00:11:21,652 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 00:11:21,653 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 00:11:21,653 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 00:11:21,663 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 00:11:21,663 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 00:11:21,664 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 00:11:21,667 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 00:11:21,668 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 00:11:21,669 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 00:11:21,709 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 00:11:21,710 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 00:11:21,710 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 00:11:21,710 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 00:11:21,711 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 00:11:21,711 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 00:11:21,712 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 00:11:21,712 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 00:11:21,712 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 00:11:21,712 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 00:11:21,713 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 00:11:21,713 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 00:11:21,713 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 00:11:21,713 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 00:11:21,713 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 00:11:21,713 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 00:11:21,713 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 00:11:21,713 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 00:11:21,714 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 00:11:21,715 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 00:11:21,715 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 00:11:21,715 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 00:11:21,715 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 00:11:21,715 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 00:11:21,715 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 00:11:21,715 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 00:11:21,715 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 00:11:21,716 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 00:11:21,716 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 00:11:21,716 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 00:11:21,716 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 00:11:21,716 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 00:11:21,716 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 00:11:21,717 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 00:11:21,717 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 00:11:21,717 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 00:11:21,717 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 00:11:21,717 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 00:11:21,717 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 00:11:21,717 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 00:11:21,717 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 00:11:21,718 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-04-01 00:11:21,997 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 00:11:22,025 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 00:11:22,027 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 00:11:22,028 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 00:11:22,030 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 00:11:22,031 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_floodmax.4.ufo.UNBOUNDED.pals.c [2023-04-01 00:11:23,367 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 00:11:23,637 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 00:11:23,637 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_floodmax.4.ufo.UNBOUNDED.pals.c [2023-04-01 00:11:23,658 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0d2099bd3/aa46b6f7a58d44a18411bd15066f0443/FLAG3998ff1dc [2023-04-01 00:11:23,683 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0d2099bd3/aa46b6f7a58d44a18411bd15066f0443 [2023-04-01 00:11:23,686 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 00:11:23,688 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 00:11:23,693 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 00:11:23,693 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 00:11:23,696 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 00:11:23,697 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:11:23" (1/1) ... [2023-04-01 00:11:23,699 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38d9a4ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:11:23, skipping insertion in model container [2023-04-01 00:11:23,699 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:11:23" (1/1) ... [2023-04-01 00:11:23,705 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 00:11:23,758 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 00:11:24,020 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.ufo.UNBOUNDED.pals.c[28366,28379] [2023-04-01 00:11:24,038 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 00:11:24,052 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 00:11:24,140 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.ufo.UNBOUNDED.pals.c[28366,28379] [2023-04-01 00:11:24,141 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 00:11:24,156 INFO L208 MainTranslator]: Completed translation [2023-04-01 00:11:24,156 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:11:24 WrapperNode [2023-04-01 00:11:24,157 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 00:11:24,158 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 00:11:24,158 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 00:11:24,158 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 00:11:24,177 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:11:24" (1/1) ... [2023-04-01 00:11:24,189 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:11:24" (1/1) ... [2023-04-01 00:11:24,204 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:11:24" (1/1) ... [2023-04-01 00:11:24,204 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:11:24" (1/1) ... [2023-04-01 00:11:24,226 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:11:24" (1/1) ... [2023-04-01 00:11:24,242 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:11:24" (1/1) ... [2023-04-01 00:11:24,246 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:11:24" (1/1) ... [2023-04-01 00:11:24,250 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:11:24" (1/1) ... [2023-04-01 00:11:24,257 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 00:11:24,258 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 00:11:24,258 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 00:11:24,258 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 00:11:24,259 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:11:24" (1/1) ... [2023-04-01 00:11:24,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 00:11:24,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 00:11:24,300 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 00:11:24,315 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 00:11:24,352 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 00:11:24,352 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 00:11:24,352 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 00:11:24,354 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 00:11:24,354 INFO L138 BoogieDeclarations]: Found implementation of procedure node1 [2023-04-01 00:11:24,354 INFO L138 BoogieDeclarations]: Found implementation of procedure node2 [2023-04-01 00:11:24,354 INFO L138 BoogieDeclarations]: Found implementation of procedure node3 [2023-04-01 00:11:24,354 INFO L138 BoogieDeclarations]: Found implementation of procedure node4 [2023-04-01 00:11:24,354 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2023-04-01 00:11:24,355 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2023-04-01 00:11:24,355 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 00:11:24,355 INFO L138 BoogieDeclarations]: Found implementation of procedure assert [2023-04-01 00:11:24,355 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 00:11:24,355 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 00:11:24,355 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 00:11:24,355 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 00:11:24,356 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-01 00:11:24,356 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2023-04-01 00:11:24,356 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-01 00:11:24,356 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-01 00:11:24,357 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 00:11:24,357 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-01 00:11:24,357 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-01 00:11:24,357 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-01 00:11:24,357 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-01 00:11:24,357 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-01 00:11:24,357 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2023-04-01 00:11:24,357 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-01 00:11:24,357 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-01 00:11:24,357 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 00:11:24,357 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 00:11:24,358 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 00:11:24,358 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 00:11:24,358 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 00:11:24,358 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 00:11:24,358 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 00:11:24,572 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 00:11:24,574 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 00:11:25,418 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 00:11:26,061 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 00:11:26,061 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 00:11:26,064 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:11:26 BoogieIcfgContainer [2023-04-01 00:11:26,064 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 00:11:26,066 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 00:11:26,066 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 00:11:26,069 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 00:11:26,069 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 12:11:23" (1/3) ... [2023-04-01 00:11:26,070 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34606d57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:11:26, skipping insertion in model container [2023-04-01 00:11:26,070 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:11:24" (2/3) ... [2023-04-01 00:11:26,070 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34606d57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:11:26, skipping insertion in model container [2023-04-01 00:11:26,070 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:11:26" (3/3) ... [2023-04-01 00:11:26,072 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_floodmax.4.ufo.UNBOUNDED.pals.c [2023-04-01 00:11:26,089 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 00:11:26,089 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 00:11:26,138 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 00:11:26,144 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;@706d968a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 00:11:26,145 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 00:11:26,151 INFO L276 IsEmpty]: Start isEmpty. Operand has 174 states, 152 states have (on average 1.5657894736842106) internal successors, (238), 154 states have internal predecessors, (238), 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 00:11:26,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-04-01 00:11:26,167 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:11:26,169 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 00:11:26,170 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:11:26,176 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:11:26,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1613895835, now seen corresponding path program 1 times [2023-04-01 00:11:26,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:11:26,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900614696] [2023-04-01 00:11:26,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:11:26,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:11:27,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:11:33,273 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 00:11:33,274 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:11:33,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900614696] [2023-04-01 00:11:33,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900614696] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:11:33,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:11:33,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2023-04-01 00:11:33,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090742102] [2023-04-01 00:11:33,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:11:33,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-04-01 00:11:33,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:11:33,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-04-01 00:11:33,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2023-04-01 00:11:33,328 INFO L87 Difference]: Start difference. First operand has 174 states, 152 states have (on average 1.5657894736842106) internal successors, (238), 154 states have internal predecessors, (238), 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 00:11:35,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:11:35,794 INFO L93 Difference]: Finished difference Result 266 states and 386 transitions. [2023-04-01 00:11:35,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-04-01 00:11:35,796 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 00:11:35,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:11:35,807 INFO L225 Difference]: With dead ends: 266 [2023-04-01 00:11:35,807 INFO L226 Difference]: Without dead ends: 225 [2023-04-01 00:11:35,813 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=320, Invalid=1012, Unknown=0, NotChecked=0, Total=1332 [2023-04-01 00:11:35,816 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 1380 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 2372 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1383 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 2481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 2372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-04-01 00:11:35,817 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1383 Valid, 138 Invalid, 2481 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [109 Valid, 2372 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-04-01 00:11:35,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2023-04-01 00:11:35,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 201. [2023-04-01 00:11:35,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 171 states have (on average 1.5497076023391814) internal successors, (265), 172 states have internal predecessors, (265), 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 00:11:35,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 295 transitions. [2023-04-01 00:11:35,898 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 295 transitions. Word has length 85 [2023-04-01 00:11:35,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:11:35,899 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 295 transitions. [2023-04-01 00:11:35,899 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 00:11:35,899 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 295 transitions. [2023-04-01 00:11:35,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-04-01 00:11:35,921 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:11:35,921 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 00:11:35,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 00:11:35,922 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:11:35,922 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:11:35,922 INFO L85 PathProgramCache]: Analyzing trace with hash 1092511881, now seen corresponding path program 1 times [2023-04-01 00:11:35,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:11:35,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758931188] [2023-04-01 00:11:35,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:11:35,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:11:35,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:11:38,560 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 00:11:38,561 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:11:38,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758931188] [2023-04-01 00:11:38,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758931188] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:11:38,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:11:38,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-01 00:11:38,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530392491] [2023-04-01 00:11:38,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:11:38,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 00:11:38,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:11:38,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 00:11:38,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-04-01 00:11:38,572 INFO L87 Difference]: Start difference. First operand 201 states and 295 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 00:11:39,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:11:39,697 INFO L93 Difference]: Finished difference Result 277 states and 392 transitions. [2023-04-01 00:11:39,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 00:11:39,697 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 00:11:39,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:11:39,706 INFO L225 Difference]: With dead ends: 277 [2023-04-01 00:11:39,707 INFO L226 Difference]: Without dead ends: 232 [2023-04-01 00:11:39,710 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2023-04-01 00:11:39,711 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 567 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 1775 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 570 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 1819 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1775 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-04-01 00:11:39,711 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [570 Valid, 87 Invalid, 1819 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1775 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-04-01 00:11:39,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2023-04-01 00:11:39,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 201. [2023-04-01 00:11:39,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 171 states have (on average 1.543859649122807) internal successors, (264), 172 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 00:11:39,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 293 transitions. [2023-04-01 00:11:39,736 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 293 transitions. Word has length 86 [2023-04-01 00:11:39,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:11:39,737 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 293 transitions. [2023-04-01 00:11:39,737 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 00:11:39,737 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 293 transitions. [2023-04-01 00:11:39,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-04-01 00:11:39,738 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:11:39,738 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 00:11:39,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 00:11:39,738 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:11:39,738 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:11:39,739 INFO L85 PathProgramCache]: Analyzing trace with hash 198516558, now seen corresponding path program 1 times [2023-04-01 00:11:39,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:11:39,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558985939] [2023-04-01 00:11:39,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:11:39,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:11:39,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:11:41,862 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 00:11:41,863 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:11:41,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558985939] [2023-04-01 00:11:41,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558985939] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:11:41,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:11:41,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-01 00:11:41,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404401397] [2023-04-01 00:11:41,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:11:41,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 00:11:41,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:11:41,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 00:11:41,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-04-01 00:11:41,865 INFO L87 Difference]: Start difference. First operand 201 states and 293 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 00:11:42,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:11:42,879 INFO L93 Difference]: Finished difference Result 271 states and 376 transitions. [2023-04-01 00:11:42,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 00:11:42,880 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 00:11:42,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:11:42,881 INFO L225 Difference]: With dead ends: 271 [2023-04-01 00:11:42,881 INFO L226 Difference]: Without dead ends: 231 [2023-04-01 00:11:42,882 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 00:11:42,883 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 570 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 2051 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 575 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 2089 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 2051 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-04-01 00:11:42,883 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [575 Valid, 96 Invalid, 2089 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 2051 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-04-01 00:11:42,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2023-04-01 00:11:42,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 201. [2023-04-01 00:11:42,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 171 states have (on average 1.5380116959064327) internal successors, (263), 172 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 00:11:42,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 292 transitions. [2023-04-01 00:11:42,901 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 292 transitions. Word has length 87 [2023-04-01 00:11:42,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:11:42,901 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 292 transitions. [2023-04-01 00:11:42,902 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 00:11:42,902 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 292 transitions. [2023-04-01 00:11:42,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-04-01 00:11:42,902 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:11:42,902 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 00:11:42,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 00:11:42,903 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:11:42,903 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:11:42,903 INFO L85 PathProgramCache]: Analyzing trace with hash -638823278, now seen corresponding path program 1 times [2023-04-01 00:11:42,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:11:42,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772128634] [2023-04-01 00:11:42,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:11:42,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:11:42,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:11:44,693 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 00:11:44,693 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:11:44,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772128634] [2023-04-01 00:11:44,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772128634] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:11:44,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:11:44,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-01 00:11:44,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569776746] [2023-04-01 00:11:44,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:11:44,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 00:11:44,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:11:44,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 00:11:44,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-04-01 00:11:44,695 INFO L87 Difference]: Start difference. First operand 201 states and 292 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 00:11:45,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:11:45,688 INFO L93 Difference]: Finished difference Result 277 states and 381 transitions. [2023-04-01 00:11:45,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 00:11:45,688 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 00:11:45,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:11:45,690 INFO L225 Difference]: With dead ends: 277 [2023-04-01 00:11:45,690 INFO L226 Difference]: Without dead ends: 237 [2023-04-01 00:11:45,691 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 00:11:45,696 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 317 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 1827 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 1855 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1827 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-04-01 00:11:45,697 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [324 Valid, 97 Invalid, 1855 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1827 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-04-01 00:11:45,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2023-04-01 00:11:45,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 201. [2023-04-01 00:11:45,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 171 states have (on average 1.5321637426900585) internal successors, (262), 172 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 00:11:45,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 291 transitions. [2023-04-01 00:11:45,716 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 291 transitions. Word has length 88 [2023-04-01 00:11:45,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:11:45,717 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 291 transitions. [2023-04-01 00:11:45,717 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 00:11:45,717 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 291 transitions. [2023-04-01 00:11:45,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-04-01 00:11:45,720 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:11:45,721 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 00:11:45,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 00:11:45,721 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:11:45,721 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:11:45,721 INFO L85 PathProgramCache]: Analyzing trace with hash 280156983, now seen corresponding path program 1 times [2023-04-01 00:11:45,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:11:45,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814416914] [2023-04-01 00:11:45,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:11:45,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:11:45,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:11:47,437 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 00:11:47,438 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:11:47,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814416914] [2023-04-01 00:11:47,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814416914] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:11:47,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:11:47,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-01 00:11:47,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524369775] [2023-04-01 00:11:47,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:11:47,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 00:11:47,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:11:47,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 00:11:47,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-04-01 00:11:47,445 INFO L87 Difference]: Start difference. First operand 201 states and 291 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 00:11:48,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:11:48,511 INFO L93 Difference]: Finished difference Result 283 states and 386 transitions. [2023-04-01 00:11:48,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 00:11:48,511 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 00:11:48,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:11:48,513 INFO L225 Difference]: With dead ends: 283 [2023-04-01 00:11:48,513 INFO L226 Difference]: Without dead ends: 243 [2023-04-01 00:11:48,513 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 00:11:48,514 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 576 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 2091 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 585 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 2133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 2091 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-04-01 00:11:48,514 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [585 Valid, 100 Invalid, 2133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 2091 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-04-01 00:11:48,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2023-04-01 00:11:48,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 201. [2023-04-01 00:11:48,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 171 states have (on average 1.5263157894736843) internal successors, (261), 172 states have internal predecessors, (261), 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 00:11:48,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 290 transitions. [2023-04-01 00:11:48,533 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 290 transitions. Word has length 89 [2023-04-01 00:11:48,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:11:48,534 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 290 transitions. [2023-04-01 00:11:48,534 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 00:11:48,534 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 290 transitions. [2023-04-01 00:11:48,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2023-04-01 00:11:48,536 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:11:48,536 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 00:11:48,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 00:11:48,536 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:11:48,536 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:11:48,537 INFO L85 PathProgramCache]: Analyzing trace with hash 855801791, now seen corresponding path program 1 times [2023-04-01 00:11:48,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:11:48,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140971089] [2023-04-01 00:11:48,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:11:48,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:11:48,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:11:52,221 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 00:11:52,221 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:11:52,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140971089] [2023-04-01 00:11:52,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140971089] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:11:52,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:11:52,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2023-04-01 00:11:52,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030243021] [2023-04-01 00:11:52,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:11:52,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-04-01 00:11:52,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:11:52,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-04-01 00:11:52,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2023-04-01 00:11:52,223 INFO L87 Difference]: Start difference. First operand 201 states and 290 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 00:11:54,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:11:54,667 INFO L93 Difference]: Finished difference Result 295 states and 406 transitions. [2023-04-01 00:11:54,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-04-01 00:11:54,668 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 00:11:54,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:11:54,670 INFO L225 Difference]: With dead ends: 295 [2023-04-01 00:11:54,670 INFO L226 Difference]: Without dead ends: 251 [2023-04-01 00:11:54,671 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=435, Invalid=1457, Unknown=0, NotChecked=0, Total=1892 [2023-04-01 00:11:54,672 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 1790 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 2441 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1793 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 2604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 2441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-04-01 00:11:54,672 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1793 Valid, 155 Invalid, 2604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 2441 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-04-01 00:11:54,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2023-04-01 00:11:54,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 205. [2023-04-01 00:11:54,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 175 states have (on average 1.5085714285714287) internal successors, (264), 176 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 00:11:54,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 293 transitions. [2023-04-01 00:11:54,703 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 293 transitions. Word has length 91 [2023-04-01 00:11:54,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:11:54,703 INFO L495 AbstractCegarLoop]: Abstraction has 205 states and 293 transitions. [2023-04-01 00:11:54,703 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 00:11:54,703 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 293 transitions. [2023-04-01 00:11:54,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-04-01 00:11:54,704 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:11:54,704 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 00:11:54,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-01 00:11:54,704 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:11:54,705 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:11:54,705 INFO L85 PathProgramCache]: Analyzing trace with hash -726786231, now seen corresponding path program 1 times [2023-04-01 00:11:54,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:11:54,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535024735] [2023-04-01 00:11:54,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:11:54,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:11:54,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:11:56,105 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 00:11:56,105 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:11:56,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535024735] [2023-04-01 00:11:56,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535024735] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:11:56,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:11:56,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-01 00:11:56,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340709621] [2023-04-01 00:11:56,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:11:56,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 00:11:56,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:11:56,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 00:11:56,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-04-01 00:11:56,110 INFO L87 Difference]: Start difference. First operand 205 states and 293 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 00:11:57,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:11:57,337 INFO L93 Difference]: Finished difference Result 296 states and 406 transitions. [2023-04-01 00:11:57,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 00:11:57,338 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 00:11:57,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:11:57,340 INFO L225 Difference]: With dead ends: 296 [2023-04-01 00:11:57,340 INFO L226 Difference]: Without dead ends: 248 [2023-04-01 00:11:57,341 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2023-04-01 00:11:57,342 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 555 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 1889 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 561 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 1953 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1889 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-04-01 00:11:57,342 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [561 Valid, 101 Invalid, 1953 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1889 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-04-01 00:11:57,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2023-04-01 00:11:57,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 233. [2023-04-01 00:11:57,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 191 states have (on average 1.4659685863874345) internal successors, (280), 192 states have internal predecessors, (280), 21 states have call successors, (21), 21 states have call predecessors, (21), 20 states have return successors, (21), 19 states have call predecessors, (21), 20 states have call successors, (21) [2023-04-01 00:11:57,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 322 transitions. [2023-04-01 00:11:57,380 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 322 transitions. Word has length 92 [2023-04-01 00:11:57,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:11:57,380 INFO L495 AbstractCegarLoop]: Abstraction has 233 states and 322 transitions. [2023-04-01 00:11:57,380 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 00:11:57,380 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 322 transitions. [2023-04-01 00:11:57,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-04-01 00:11:57,382 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:11:57,382 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 00:11:57,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-01 00:11:57,382 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:11:57,383 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:11:57,383 INFO L85 PathProgramCache]: Analyzing trace with hash -1577658737, now seen corresponding path program 1 times [2023-04-01 00:11:57,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:11:57,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588493709] [2023-04-01 00:11:57,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:11:57,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:11:57,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:12:02,678 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 00:12:02,678 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:12:02,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588493709] [2023-04-01 00:12:02,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588493709] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:12:02,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:12:02,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2023-04-01 00:12:02,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162210884] [2023-04-01 00:12:02,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:12:02,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-04-01 00:12:02,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:12:02,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-04-01 00:12:02,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=576, Unknown=0, NotChecked=0, Total=650 [2023-04-01 00:12:02,680 INFO L87 Difference]: Start difference. First operand 233 states and 322 transitions. Second operand has 26 states, 16 states have (on average 4.75) internal successors, (76), 17 states have internal predecessors, (76), 9 states have call successors, (10), 7 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-04-01 00:12:07,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:12:07,253 INFO L93 Difference]: Finished difference Result 866 states and 1210 transitions. [2023-04-01 00:12:07,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-04-01 00:12:07,254 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 16 states have (on average 4.75) internal successors, (76), 17 states have internal predecessors, (76), 9 states have call successors, (10), 7 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 94 [2023-04-01 00:12:07,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:12:07,261 INFO L225 Difference]: With dead ends: 866 [2023-04-01 00:12:07,261 INFO L226 Difference]: Without dead ends: 668 [2023-04-01 00:12:07,267 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1173 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=847, Invalid=3983, Unknown=0, NotChecked=0, Total=4830 [2023-04-01 00:12:07,271 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 6427 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 3734 mSolverCounterSat, 244 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6440 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 3978 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 244 IncrementalHoareTripleChecker+Valid, 3734 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-04-01 00:12:07,271 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6440 Valid, 204 Invalid, 3978 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [244 Valid, 3734 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-04-01 00:12:07,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2023-04-01 00:12:07,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 477. [2023-04-01 00:12:07,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 422 states have (on average 1.4881516587677726) internal successors, (628), 424 states have internal predecessors, (628), 27 states have call successors, (27), 27 states have call predecessors, (27), 27 states have return successors, (28), 25 states have call predecessors, (28), 26 states have call successors, (28) [2023-04-01 00:12:07,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 683 transitions. [2023-04-01 00:12:07,374 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 683 transitions. Word has length 94 [2023-04-01 00:12:07,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:12:07,374 INFO L495 AbstractCegarLoop]: Abstraction has 477 states and 683 transitions. [2023-04-01 00:12:07,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 16 states have (on average 4.75) internal successors, (76), 17 states have internal predecessors, (76), 9 states have call successors, (10), 7 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-04-01 00:12:07,375 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 683 transitions. [2023-04-01 00:12:07,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-04-01 00:12:07,376 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:12:07,376 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 00:12:07,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-01 00:12:07,376 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:12:07,377 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:12:07,377 INFO L85 PathProgramCache]: Analyzing trace with hash -1192173294, now seen corresponding path program 1 times [2023-04-01 00:12:07,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:12:07,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895754600] [2023-04-01 00:12:07,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:12:07,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:12:07,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:12:09,477 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 00:12:09,477 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:12:09,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895754600] [2023-04-01 00:12:09,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895754600] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:12:09,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:12:09,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-04-01 00:12:09,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129053068] [2023-04-01 00:12:09,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:12:09,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-01 00:12:09,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:12:09,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-01 00:12:09,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2023-04-01 00:12:09,481 INFO L87 Difference]: Start difference. First operand 477 states and 683 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 00:12:10,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:12:10,020 INFO L93 Difference]: Finished difference Result 513 states and 728 transitions. [2023-04-01 00:12:10,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-04-01 00:12:10,021 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 00:12:10,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:12:10,024 INFO L225 Difference]: With dead ends: 513 [2023-04-01 00:12:10,024 INFO L226 Difference]: Without dead ends: 511 [2023-04-01 00:12:10,025 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2023-04-01 00:12:10,025 INFO L413 NwaCegarLoop]: 229 mSDtfsCounter, 35 mSDsluCounter, 2438 mSDsCounter, 0 mSdLazyCounter, 543 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 2667 SdHoareTripleChecker+Invalid, 560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 00:12:10,025 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 2667 Invalid, 560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 543 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 00:12:10,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2023-04-01 00:12:10,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 487. [2023-04-01 00:12:10,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 487 states, 428 states have (on average 1.4813084112149533) internal successors, (634), 432 states have internal predecessors, (634), 28 states have call successors, (28), 28 states have call predecessors, (28), 30 states have return successors, (31), 26 states have call predecessors, (31), 27 states have call successors, (31) [2023-04-01 00:12:10,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 693 transitions. [2023-04-01 00:12:10,106 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 693 transitions. Word has length 95 [2023-04-01 00:12:10,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:12:10,107 INFO L495 AbstractCegarLoop]: Abstraction has 487 states and 693 transitions. [2023-04-01 00:12:10,107 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 00:12:10,107 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 693 transitions. [2023-04-01 00:12:10,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-04-01 00:12:10,108 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:12:10,108 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 00:12:10,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-01 00:12:10,109 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:12:10,109 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:12:10,109 INFO L85 PathProgramCache]: Analyzing trace with hash 1069738731, now seen corresponding path program 1 times [2023-04-01 00:12:10,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:12:10,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554016547] [2023-04-01 00:12:10,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:12:10,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:12:10,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:12:10,194 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 00:12:10,194 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:12:10,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554016547] [2023-04-01 00:12:10,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554016547] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:12:10,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:12:10,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 00:12:10,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720989505] [2023-04-01 00:12:10,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:12:10,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 00:12:10,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:12:10,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 00:12:10,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 00:12:10,196 INFO L87 Difference]: Start difference. First operand 487 states and 693 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-04-01 00:12:10,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:12:10,404 INFO L93 Difference]: Finished difference Result 1160 states and 1678 transitions. [2023-04-01 00:12:10,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 00:12:10,405 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 96 [2023-04-01 00:12:10,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:12:10,408 INFO L225 Difference]: With dead ends: 1160 [2023-04-01 00:12:10,409 INFO L226 Difference]: Without dead ends: 751 [2023-04-01 00:12:10,410 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 00:12:10,413 INFO L413 NwaCegarLoop]: 219 mSDtfsCounter, 131 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 00:12:10,413 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 429 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 00:12:10,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states.