/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.4.2.ufo.BOUNDED-8.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-03 02:01:48,666 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-03 02:01:48,668 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-03 02:01:48,711 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-03 02:01:48,711 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-03 02:01:48,714 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-03 02:01:48,717 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-03 02:01:48,719 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-03 02:01:48,721 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-03 02:01:48,725 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-03 02:01:48,727 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-03 02:01:48,729 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-03 02:01:48,729 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-03 02:01:48,734 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-03 02:01:48,735 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-03 02:01:48,737 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-03 02:01:48,737 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-03 02:01:48,738 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-03 02:01:48,740 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-03 02:01:48,746 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-03 02:01:48,747 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-03 02:01:48,748 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-03 02:01:48,749 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-03 02:01:48,750 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-03 02:01:48,758 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-03 02:01:48,758 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-03 02:01:48,759 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-03 02:01:48,760 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-03 02:01:48,760 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-03 02:01:48,761 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-03 02:01:48,761 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-03 02:01:48,762 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-03 02:01:48,762 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-03 02:01:48,763 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-03 02:01:48,763 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-03 02:01:48,764 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-03 02:01:48,764 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-03 02:01:48,764 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-03 02:01:48,764 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-03 02:01:48,765 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-03 02:01:48,765 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-03 02:01:48,767 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-03 02:01:48,797 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-03 02:01:48,797 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-03 02:01:48,797 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-03 02:01:48,797 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-03 02:01:48,798 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-03 02:01:48,798 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-03 02:01:48,798 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-03 02:01:48,799 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-03 02:01:48,799 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-03 02:01:48,799 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-03 02:01:48,799 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-03 02:01:48,800 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-03 02:01:48,800 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-03 02:01:48,800 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-03 02:01:48,800 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-03 02:01:48,800 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-03 02:01:48,800 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-03 02:01:48,800 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-03 02:01:48,801 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-03 02:01:48,801 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-03 02:01:48,801 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-03 02:01:48,801 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-03 02:01:48,801 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-03 02:01:48,801 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-03 02:01:48,802 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-03 02:01:48,802 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-03 02:01:48,802 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-03 02:01:48,802 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-03 02:01:48,802 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-03 02:01:48,802 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-03 02:01:48,802 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-03 02:01:48,803 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-03 02:01:48,803 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 02:01:48,803 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-03 02:01:48,803 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-03 02:01:48,803 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-03 02:01:48,803 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-03 02:01:48,803 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-03 02:01:48,804 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-03 02:01:48,804 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-03 02:01:48,804 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-03 02:01:48,804 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-03 02:01:49,054 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-03 02:01:49,084 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-03 02:01:49,086 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-03 02:01:49,088 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-03 02:01:49,088 INFO L275 PluginConnector]: CDTParser initialized [2023-04-03 02:01:49,089 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.4.2.ufo.BOUNDED-8.pals.c [2023-04-03 02:01:50,231 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-03 02:01:50,520 INFO L351 CDTParser]: Found 1 translation units. [2023-04-03 02:01:50,520 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.4.2.ufo.BOUNDED-8.pals.c [2023-04-03 02:01:50,529 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/33d0f4d14/d4b0bf9b00d7450d90d8d0a40be946dc/FLAGada8d673b [2023-04-03 02:01:50,542 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/33d0f4d14/d4b0bf9b00d7450d90d8d0a40be946dc [2023-04-03 02:01:50,544 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-03 02:01:50,545 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-03 02:01:50,546 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-03 02:01:50,546 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-03 02:01:50,552 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-03 02:01:50,553 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 02:01:50" (1/1) ... [2023-04-03 02:01:50,553 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@505aabf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:01:50, skipping insertion in model container [2023-04-03 02:01:50,554 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 02:01:50" (1/1) ... [2023-04-03 02:01:50,559 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-03 02:01:50,602 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-03 02:01:50,836 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_opt-floodmax.4.2.ufo.BOUNDED-8.pals.c[30998,31011] [2023-04-03 02:01:50,840 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 02:01:50,851 INFO L203 MainTranslator]: Completed pre-run [2023-04-03 02:01:50,920 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_opt-floodmax.4.2.ufo.BOUNDED-8.pals.c[30998,31011] [2023-04-03 02:01:50,921 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 02:01:50,934 INFO L208 MainTranslator]: Completed translation [2023-04-03 02:01:50,934 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:01:50 WrapperNode [2023-04-03 02:01:50,934 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-03 02:01:50,935 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-03 02:01:50,935 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-03 02:01:50,935 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-03 02:01:50,948 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:01:50" (1/1) ... [2023-04-03 02:01:50,948 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:01:50" (1/1) ... [2023-04-03 02:01:50,965 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:01:50" (1/1) ... [2023-04-03 02:01:50,965 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:01:50" (1/1) ... [2023-04-03 02:01:50,987 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:01:50" (1/1) ... [2023-04-03 02:01:51,004 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:01:50" (1/1) ... [2023-04-03 02:01:51,019 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:01:50" (1/1) ... [2023-04-03 02:01:51,023 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:01:50" (1/1) ... [2023-04-03 02:01:51,038 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-03 02:01:51,039 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-03 02:01:51,039 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-03 02:01:51,039 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-03 02:01:51,039 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:01:50" (1/1) ... [2023-04-03 02:01:51,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 02:01:51,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 02:01:51,076 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-03 02:01:51,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-03 02:01:51,109 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-03 02:01:51,109 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-03 02:01:51,109 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-03 02:01:51,114 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-03 02:01:51,114 INFO L138 BoogieDeclarations]: Found implementation of procedure node1 [2023-04-03 02:01:51,114 INFO L138 BoogieDeclarations]: Found implementation of procedure node2 [2023-04-03 02:01:51,115 INFO L138 BoogieDeclarations]: Found implementation of procedure node3 [2023-04-03 02:01:51,115 INFO L138 BoogieDeclarations]: Found implementation of procedure node4 [2023-04-03 02:01:51,115 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2023-04-03 02:01:51,115 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2023-04-03 02:01:51,115 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-03 02:01:51,115 INFO L138 BoogieDeclarations]: Found implementation of procedure assert [2023-04-03 02:01:51,115 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-03 02:01:51,115 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-03 02:01:51,116 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-03 02:01:51,116 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-03 02:01:51,116 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-03 02:01:51,116 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-03 02:01:51,116 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-03 02:01:51,116 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-03 02:01:51,116 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-03 02:01:51,117 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-03 02:01:51,117 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-03 02:01:51,117 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-03 02:01:51,117 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-03 02:01:51,117 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2023-04-03 02:01:51,117 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-03 02:01:51,117 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-03 02:01:51,117 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-03 02:01:51,117 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-03 02:01:51,118 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-03 02:01:51,118 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-03 02:01:51,118 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-03 02:01:51,118 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-03 02:01:51,118 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-03 02:01:51,327 INFO L236 CfgBuilder]: Building ICFG [2023-04-03 02:01:51,329 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-03 02:01:52,231 INFO L277 CfgBuilder]: Performing block encoding [2023-04-03 02:01:53,092 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-03 02:01:53,093 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-03 02:01:53,096 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 02:01:53 BoogieIcfgContainer [2023-04-03 02:01:53,096 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-03 02:01:53,099 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-03 02:01:53,099 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-03 02:01:53,102 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-03 02:01:53,102 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.04 02:01:50" (1/3) ... [2023-04-03 02:01:53,103 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55f804a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 02:01:53, skipping insertion in model container [2023-04-03 02:01:53,103 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:01:50" (2/3) ... [2023-04-03 02:01:53,103 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55f804a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 02:01:53, skipping insertion in model container [2023-04-03 02:01:53,103 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 02:01:53" (3/3) ... [2023-04-03 02:01:53,106 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.2.ufo.BOUNDED-8.pals.c [2023-04-03 02:01:53,123 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-03 02:01:53,123 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-03 02:01:53,182 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-03 02:01:53,189 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;@2595148e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-03 02:01:53,189 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-03 02:01:53,196 INFO L276 IsEmpty]: Start isEmpty. Operand has 175 states, 153 states have (on average 1.5620915032679739) internal successors, (239), 154 states have internal predecessors, (239), 10 states have call successors, (10), 10 states have call predecessors, (10), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-04-03 02:01:53,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-04-03 02:01:53,209 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:01:53,211 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] [2023-04-03 02:01:53,212 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:01:53,218 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:01:53,219 INFO L85 PathProgramCache]: Analyzing trace with hash -968827168, now seen corresponding path program 1 times [2023-04-03 02:01:53,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:01:53,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839695789] [2023-04-03 02:01:53,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:01:53,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:01:53,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:01:59,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:01:59,662 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:01:59,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839695789] [2023-04-03 02:01:59,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839695789] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:01:59,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:01:59,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2023-04-03 02:01:59,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076761589] [2023-04-03 02:01:59,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:01:59,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-04-03 02:01:59,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:01:59,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-04-03 02:01:59,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2023-04-03 02:01:59,720 INFO L87 Difference]: Start difference. First operand has 175 states, 153 states have (on average 1.5620915032679739) internal successors, (239), 154 states have internal predecessors, (239), 10 states have call successors, (10), 10 states have call predecessors, (10), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 20 states, 10 states have (on average 6.7) internal successors, (67), 12 states have internal predecessors, (67), 8 states have call successors, (10), 6 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2023-04-03 02:02:01,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:02:01,882 INFO L93 Difference]: Finished difference Result 282 states and 398 transitions. [2023-04-03 02:02:01,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-04-03 02:02:01,884 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 [2023-04-03 02:02:01,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:02:01,894 INFO L225 Difference]: With dead ends: 282 [2023-04-03 02:02:01,894 INFO L226 Difference]: Without dead ends: 228 [2023-04-03 02:02:01,897 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 [2023-04-03 02:02:01,900 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 1937 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 2136 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1940 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 2307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 2136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-04-03 02:02:01,901 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1940 Valid, 165 Invalid, 2307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 2136 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-04-03 02:02:01,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2023-04-03 02:02:01,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 202. [2023-04-03 02:02:01,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 172 states have (on average 1.5465116279069768) internal successors, (266), 173 states have internal predecessors, (266), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (15), 13 states have call predecessors, (15), 14 states have call successors, (15) [2023-04-03 02:02:01,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 296 transitions. [2023-04-03 02:02:01,972 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 296 transitions. Word has length 85 [2023-04-03 02:02:01,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:02:01,973 INFO L495 AbstractCegarLoop]: Abstraction has 202 states and 296 transitions. [2023-04-03 02:02:01,974 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) [2023-04-03 02:02:01,974 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 296 transitions. [2023-04-03 02:02:01,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-04-03 02:02:01,983 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:02:01,984 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:02:01,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-03 02:02:01,984 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:02:01,984 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:02:01,985 INFO L85 PathProgramCache]: Analyzing trace with hash 651378341, now seen corresponding path program 1 times [2023-04-03 02:02:01,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:02:01,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796447386] [2023-04-03 02:02:01,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:02:01,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:02:02,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:02:04,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:02:04,780 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:02:04,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796447386] [2023-04-03 02:02:04,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796447386] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:02:04,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:02:04,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-03 02:02:04,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929018966] [2023-04-03 02:02:04,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:02:04,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-03 02:02:04,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:02:04,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-03 02:02:04,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-04-03 02:02:04,789 INFO L87 Difference]: Start difference. First operand 202 states and 296 transitions. Second operand has 11 states, 7 states have (on average 9.714285714285714) internal successors, (68), 9 states have internal predecessors, (68), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-03 02:02:05,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:02:05,939 INFO L93 Difference]: Finished difference Result 281 states and 396 transitions. [2023-04-03 02:02:05,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-03 02:02:05,940 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 [2023-04-03 02:02:05,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:02:05,942 INFO L225 Difference]: With dead ends: 281 [2023-04-03 02:02:05,943 INFO L226 Difference]: Without dead ends: 235 [2023-04-03 02:02:05,943 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2023-04-03 02:02:05,944 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 311 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 1794 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 1830 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1794 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:02:05,945 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [314 Valid, 106 Invalid, 1830 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1794 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-04-03 02:02:05,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2023-04-03 02:02:05,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 202. [2023-04-03 02:02:05,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 172 states have (on average 1.5406976744186047) internal successors, (265), 173 states have internal predecessors, (265), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2023-04-03 02:02:05,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 294 transitions. [2023-04-03 02:02:05,989 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 294 transitions. Word has length 86 [2023-04-03 02:02:05,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:02:05,991 INFO L495 AbstractCegarLoop]: Abstraction has 202 states and 294 transitions. [2023-04-03 02:02:05,991 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) [2023-04-03 02:02:05,991 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 294 transitions. [2023-04-03 02:02:05,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-04-03 02:02:05,994 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:02:05,994 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:02:05,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-03 02:02:05,994 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:02:05,995 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:02:05,995 INFO L85 PathProgramCache]: Analyzing trace with hash 444852969, now seen corresponding path program 1 times [2023-04-03 02:02:05,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:02:05,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202494909] [2023-04-03 02:02:05,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:02:05,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:02:06,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:02:08,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:02:08,725 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:02:08,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202494909] [2023-04-03 02:02:08,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202494909] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:02:08,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:02:08,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-03 02:02:08,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108858351] [2023-04-03 02:02:08,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:02:08,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-03 02:02:08,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:02:08,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-03 02:02:08,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-04-03 02:02:08,729 INFO L87 Difference]: Start difference. First operand 202 states and 294 transitions. Second operand has 11 states, 7 states have (on average 9.857142857142858) internal successors, (69), 9 states have internal predecessors, (69), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-03 02:02:09,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:02:09,919 INFO L93 Difference]: Finished difference Result 275 states and 380 transitions. [2023-04-03 02:02:09,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-03 02:02:09,919 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 [2023-04-03 02:02:09,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:02:09,921 INFO L225 Difference]: With dead ends: 275 [2023-04-03 02:02:09,921 INFO L226 Difference]: Without dead ends: 234 [2023-04-03 02:02:09,922 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 [2023-04-03 02:02:09,923 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 315 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 1855 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 1881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 1855 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:02:09,923 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [320 Valid, 112 Invalid, 1881 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 1855 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-04-03 02:02:09,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2023-04-03 02:02:09,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 202. [2023-04-03 02:02:09,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 172 states have (on average 1.5348837209302326) internal successors, (264), 173 states have internal predecessors, (264), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2023-04-03 02:02:09,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 293 transitions. [2023-04-03 02:02:09,949 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 293 transitions. Word has length 87 [2023-04-03 02:02:09,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:02:09,951 INFO L495 AbstractCegarLoop]: Abstraction has 202 states and 293 transitions. [2023-04-03 02:02:09,952 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) [2023-04-03 02:02:09,952 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 293 transitions. [2023-04-03 02:02:09,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-04-03 02:02:09,954 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:02:09,954 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:02:09,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-03 02:02:09,954 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:02:09,955 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:02:09,955 INFO L85 PathProgramCache]: Analyzing trace with hash -555754866, now seen corresponding path program 1 times [2023-04-03 02:02:09,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:02:09,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519779891] [2023-04-03 02:02:09,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:02:09,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:02:10,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:02:12,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:02:12,386 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:02:12,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519779891] [2023-04-03 02:02:12,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519779891] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:02:12,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:02:12,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-03 02:02:12,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817705497] [2023-04-03 02:02:12,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:02:12,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-03 02:02:12,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:02:12,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-03 02:02:12,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-04-03 02:02:12,389 INFO L87 Difference]: Start difference. First operand 202 states and 293 transitions. Second operand has 11 states, 7 states have (on average 10.0) internal successors, (70), 9 states have internal predecessors, (70), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-03 02:02:13,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:02:13,509 INFO L93 Difference]: Finished difference Result 281 states and 385 transitions. [2023-04-03 02:02:13,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-03 02:02:13,510 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 [2023-04-03 02:02:13,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:02:13,511 INFO L225 Difference]: With dead ends: 281 [2023-04-03 02:02:13,511 INFO L226 Difference]: Without dead ends: 240 [2023-04-03 02:02:13,512 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 [2023-04-03 02:02:13,513 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 581 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 1813 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 588 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 1871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 1813 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:02:13,514 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [588 Valid, 102 Invalid, 1871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 1813 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-04-03 02:02:13,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2023-04-03 02:02:13,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 202. [2023-04-03 02:02:13,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 172 states have (on average 1.5290697674418605) internal successors, (263), 173 states have internal predecessors, (263), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2023-04-03 02:02:13,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 292 transitions. [2023-04-03 02:02:13,559 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 292 transitions. Word has length 88 [2023-04-03 02:02:13,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:02:13,559 INFO L495 AbstractCegarLoop]: Abstraction has 202 states and 292 transitions. [2023-04-03 02:02:13,559 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) [2023-04-03 02:02:13,559 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 292 transitions. [2023-04-03 02:02:13,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-04-03 02:02:13,560 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:02:13,560 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] [2023-04-03 02:02:13,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-03 02:02:13,560 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:02:13,561 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:02:13,561 INFO L85 PathProgramCache]: Analyzing trace with hash -403115278, now seen corresponding path program 1 times [2023-04-03 02:02:13,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:02:13,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039355788] [2023-04-03 02:02:13,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:02:13,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:02:13,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:02:15,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:02:15,859 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:02:15,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039355788] [2023-04-03 02:02:15,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039355788] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:02:15,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:02:15,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-03 02:02:15,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58847857] [2023-04-03 02:02:15,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:02:15,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-03 02:02:15,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:02:15,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-03 02:02:15,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-04-03 02:02:15,866 INFO L87 Difference]: Start difference. First operand 202 states and 292 transitions. Second operand has 11 states, 7 states have (on average 10.142857142857142) internal successors, (71), 9 states have internal predecessors, (71), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-03 02:02:17,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:02:17,097 INFO L93 Difference]: Finished difference Result 287 states and 390 transitions. [2023-04-03 02:02:17,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-03 02:02:17,098 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 [2023-04-03 02:02:17,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:02:17,099 INFO L225 Difference]: With dead ends: 287 [2023-04-03 02:02:17,099 INFO L226 Difference]: Without dead ends: 246 [2023-04-03 02:02:17,100 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 [2023-04-03 02:02:17,101 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 587 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 1830 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 596 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 1893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 1830 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:02:17,101 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [596 Valid, 104 Invalid, 1893 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 1830 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-04-03 02:02:17,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2023-04-03 02:02:17,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 202. [2023-04-03 02:02:17,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 172 states have (on average 1.5232558139534884) internal successors, (262), 173 states have internal predecessors, (262), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2023-04-03 02:02:17,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 291 transitions. [2023-04-03 02:02:17,125 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 291 transitions. Word has length 89 [2023-04-03 02:02:17,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:02:17,125 INFO L495 AbstractCegarLoop]: Abstraction has 202 states and 291 transitions. [2023-04-03 02:02:17,125 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) [2023-04-03 02:02:17,126 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 291 transitions. [2023-04-03 02:02:17,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2023-04-03 02:02:17,126 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:02:17,126 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] [2023-04-03 02:02:17,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-03 02:02:17,127 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:02:17,127 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:02:17,127 INFO L85 PathProgramCache]: Analyzing trace with hash 171793306, now seen corresponding path program 1 times [2023-04-03 02:02:17,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:02:17,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118212389] [2023-04-03 02:02:17,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:02:17,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:02:17,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:02:21,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:02:21,340 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:02:21,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118212389] [2023-04-03 02:02:21,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118212389] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:02:21,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:02:21,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2023-04-03 02:02:21,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720855471] [2023-04-03 02:02:21,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:02:21,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-04-03 02:02:21,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:02:21,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-04-03 02:02:21,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2023-04-03 02:02:21,343 INFO L87 Difference]: Start difference. First operand 202 states and 291 transitions. Second operand has 20 states, 10 states have (on average 7.3) internal successors, (73), 12 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) [2023-04-03 02:02:23,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:02:23,224 INFO L93 Difference]: Finished difference Result 282 states and 393 transitions. [2023-04-03 02:02:23,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-04-03 02:02:23,225 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 10 states have (on average 7.3) internal successors, (73), 12 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 [2023-04-03 02:02:23,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:02:23,226 INFO L225 Difference]: With dead ends: 282 [2023-04-03 02:02:23,227 INFO L226 Difference]: Without dead ends: 238 [2023-04-03 02:02:23,228 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=304, Invalid=956, Unknown=0, NotChecked=0, Total=1260 [2023-04-03 02:02:23,228 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 1353 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 1960 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1356 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 2083 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 1960 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-04-03 02:02:23,229 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1356 Valid, 149 Invalid, 2083 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 1960 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-04-03 02:02:23,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2023-04-03 02:02:23,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 204. [2023-04-03 02:02:23,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 174 states have (on average 1.5114942528735633) internal successors, (263), 175 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) [2023-04-03 02:02:23,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 292 transitions. [2023-04-03 02:02:23,260 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 292 transitions. Word has length 91 [2023-04-03 02:02:23,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:02:23,260 INFO L495 AbstractCegarLoop]: Abstraction has 204 states and 292 transitions. [2023-04-03 02:02:23,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 10 states have (on average 7.3) internal successors, (73), 12 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) [2023-04-03 02:02:23,261 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 292 transitions. [2023-04-03 02:02:23,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-04-03 02:02:23,262 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:02:23,262 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] [2023-04-03 02:02:23,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-03 02:02:23,262 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:02:23,262 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:02:23,262 INFO L85 PathProgramCache]: Analyzing trace with hash 580361477, now seen corresponding path program 1 times [2023-04-03 02:02:23,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:02:23,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975085790] [2023-04-03 02:02:23,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:02:23,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:02:23,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:02:24,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:02:24,365 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:02:24,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975085790] [2023-04-03 02:02:24,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975085790] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:02:24,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:02:24,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-03 02:02:24,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845943277] [2023-04-03 02:02:24,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:02:24,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-03 02:02:24,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:02:24,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-03 02:02:24,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2023-04-03 02:02:24,367 INFO L87 Difference]: Start difference. First operand 204 states and 292 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) [2023-04-03 02:02:25,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:02:25,372 INFO L93 Difference]: Finished difference Result 279 states and 386 transitions. [2023-04-03 02:02:25,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-03 02:02:25,372 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 [2023-04-03 02:02:25,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:02:25,374 INFO L225 Difference]: With dead ends: 279 [2023-04-03 02:02:25,374 INFO L226 Difference]: Without dead ends: 231 [2023-04-03 02:02:25,374 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2023-04-03 02:02:25,375 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 297 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 1798 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 1832 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1798 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-04-03 02:02:25,375 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [300 Valid, 105 Invalid, 1832 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1798 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-04-03 02:02:25,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2023-04-03 02:02:25,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 204. [2023-04-03 02:02:25,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 174 states have (on average 1.4885057471264367) internal successors, (259), 175 states have internal predecessors, (259), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2023-04-03 02:02:25,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 288 transitions. [2023-04-03 02:02:25,419 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 288 transitions. Word has length 92 [2023-04-03 02:02:25,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:02:25,419 INFO L495 AbstractCegarLoop]: Abstraction has 204 states and 288 transitions. [2023-04-03 02:02:25,419 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) [2023-04-03 02:02:25,419 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 288 transitions. [2023-04-03 02:02:25,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-04-03 02:02:25,421 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:02:25,421 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] [2023-04-03 02:02:25,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-03 02:02:25,421 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:02:25,421 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:02:25,421 INFO L85 PathProgramCache]: Analyzing trace with hash -728523733, now seen corresponding path program 1 times [2023-04-03 02:02:25,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:02:25,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645020447] [2023-04-03 02:02:25,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:02:25,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:02:25,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:02:28,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:02:28,591 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:02:28,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645020447] [2023-04-03 02:02:28,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645020447] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:02:28,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:02:28,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2023-04-03 02:02:28,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896130740] [2023-04-03 02:02:28,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:02:28,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-04-03 02:02:28,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:02:28,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-04-03 02:02:28,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2023-04-03 02:02:28,593 INFO L87 Difference]: Start difference. First operand 204 states and 288 transitions. Second operand has 20 states, 10 states have (on average 7.6) internal successors, (76), 12 states have internal predecessors, (76), 8 states have call successors, (10), 6 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2023-04-03 02:02:30,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:02:30,444 INFO L93 Difference]: Finished difference Result 277 states and 374 transitions. [2023-04-03 02:02:30,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-04-03 02:02:30,445 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 10 states have (on average 7.6) internal successors, (76), 12 states have internal predecessors, (76), 8 states have call successors, (10), 6 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) Word has length 94 [2023-04-03 02:02:30,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:02:30,446 INFO L225 Difference]: With dead ends: 277 [2023-04-03 02:02:30,447 INFO L226 Difference]: Without dead ends: 233 [2023-04-03 02:02:30,447 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=320, Invalid=1012, Unknown=0, NotChecked=0, Total=1332 [2023-04-03 02:02:30,448 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 1781 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 2351 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1784 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 2486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 2351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-04-03 02:02:30,448 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1784 Valid, 153 Invalid, 2486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 2351 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-04-03 02:02:30,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2023-04-03 02:02:30,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 204. [2023-04-03 02:02:30,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 174 states have (on average 1.4827586206896552) internal successors, (258), 175 states have internal predecessors, (258), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2023-04-03 02:02:30,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 287 transitions. [2023-04-03 02:02:30,484 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 287 transitions. Word has length 94 [2023-04-03 02:02:30,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:02:30,484 INFO L495 AbstractCegarLoop]: Abstraction has 204 states and 287 transitions. [2023-04-03 02:02:30,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 10 states have (on average 7.6) internal successors, (76), 12 states have internal predecessors, (76), 8 states have call successors, (10), 6 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2023-04-03 02:02:30,484 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 287 transitions. [2023-04-03 02:02:30,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-04-03 02:02:30,487 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:02:30,488 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] [2023-04-03 02:02:30,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-03 02:02:30,488 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:02:30,488 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:02:30,488 INFO L85 PathProgramCache]: Analyzing trace with hash -729613776, now seen corresponding path program 1 times [2023-04-03 02:02:30,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:02:30,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805185449] [2023-04-03 02:02:30,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:02:30,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:02:30,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:02:32,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:02:32,268 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:02:32,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805185449] [2023-04-03 02:02:32,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805185449] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:02:32,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:02:32,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-04-03 02:02:32,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483315735] [2023-04-03 02:02:32,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:02:32,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-03 02:02:32,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:02:32,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-03 02:02:32,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2023-04-03 02:02:32,270 INFO L87 Difference]: Start difference. First operand 204 states and 287 transitions. Second operand has 13 states, 8 states have (on average 9.625) internal successors, (77), 10 states have internal predecessors, (77), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2023-04-03 02:02:32,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:02:32,746 INFO L93 Difference]: Finished difference Result 282 states and 388 transitions. [2023-04-03 02:02:32,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-04-03 02:02:32,746 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 [2023-04-03 02:02:32,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:02:32,748 INFO L225 Difference]: With dead ends: 282 [2023-04-03 02:02:32,748 INFO L226 Difference]: Without dead ends: 240 [2023-04-03 02:02:32,749 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2023-04-03 02:02:32,751 INFO L413 NwaCegarLoop]: 230 mSDtfsCounter, 40 mSDsluCounter, 2466 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 2696 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-03 02:02:32,751 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 2696 Invalid, 584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 572 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-03 02:02:32,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2023-04-03 02:02:32,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 212. [2023-04-03 02:02:32,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 179 states have (on average 1.458100558659218) internal successors, (261), 181 states have internal predecessors, (261), 16 states have call successors, (16), 16 states have call predecessors, (16), 16 states have return successors, (16), 14 states have call predecessors, (16), 15 states have call successors, (16) [2023-04-03 02:02:32,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 293 transitions. [2023-04-03 02:02:32,795 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 293 transitions. Word has length 95 [2023-04-03 02:02:32,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:02:32,795 INFO L495 AbstractCegarLoop]: Abstraction has 212 states and 293 transitions. [2023-04-03 02:02:32,795 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) [2023-04-03 02:02:32,795 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 293 transitions. [2023-04-03 02:02:32,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2023-04-03 02:02:32,796 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:02:32,796 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:02:32,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-03 02:02:32,797 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:02:32,797 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:02:32,797 INFO L85 PathProgramCache]: Analyzing trace with hash 1321743943, now seen corresponding path program 1 times [2023-04-03 02:02:32,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:02:32,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599291900] [2023-04-03 02:02:32,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:02:32,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:02:33,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:02:38,959 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-03 02:02:38,960 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:02:38,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599291900] [2023-04-03 02:02:38,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599291900] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 02:02:38,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416067157] [2023-04-03 02:02:38,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:02:38,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 02:02:38,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 02:02:38,967 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 02:02:38,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-03 02:02:39,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:02:39,365 INFO L262 TraceCheckSpWp]: Trace formula consists of 1656 conjuncts, 100 conjunts are in the unsatisfiable core [2023-04-03 02:02:39,419 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 02:03:03,008 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:03:03,009 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-03 02:03:03,695 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 19399 disjunctions. This might take some time... [2023-04-03 02:03:22,623 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 19399 disjunctions.