/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/eca-rers2012/Problem03_label20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 16:35:46,974 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 16:35:46,975 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 16:35:47,008 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 16:35:47,008 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 16:35:47,010 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 16:35:47,014 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 16:35:47,018 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 16:35:47,020 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 16:35:47,024 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 16:35:47,025 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 16:35:47,027 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 16:35:47,027 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 16:35:47,030 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 16:35:47,030 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 16:35:47,031 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 16:35:47,032 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 16:35:47,033 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 16:35:47,035 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 16:35:47,039 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 16:35:47,040 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 16:35:47,041 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 16:35:47,042 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 16:35:47,044 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 16:35:47,051 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-02 16:35:47,051 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-02 16:35:47,052 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-02 16:35:47,053 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-02 16:35:47,053 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-02 16:35:47,054 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-02 16:35:47,054 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 16:35:47,055 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 16:35:47,056 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 16:35:47,057 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 16:35:47,058 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 16:35:47,058 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 16:35:47,058 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 16:35:47,059 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 16:35:47,059 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 16:35:47,059 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 16:35:47,060 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 16:35:47,061 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 [2023-04-02 16:35:47,096 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 16:35:47,096 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 16:35:47,097 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 16:35:47,097 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 16:35:47,097 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 16:35:47,098 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 16:35:47,098 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 16:35:47,098 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 16:35:47,098 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 16:35:47,098 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 16:35:47,099 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 16:35:47,099 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 16:35:47,099 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 16:35:47,099 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 16:35:47,099 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 16:35:47,099 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 16:35:47,100 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 16:35:47,100 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 16:35:47,100 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 16:35:47,101 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 16:35:47,101 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 16:35:47,101 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 16:35:47,101 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 16:35:47,101 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 16:35:47,101 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 16:35:47,101 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 16:35:47,102 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 16:35:47,102 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 16:35:47,102 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 16:35:47,102 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 16:35:47,102 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 16:35:47,102 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 16:35:47,102 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 16:35:47,103 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 16:35:47,103 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 16:35:47,103 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 16:35:47,103 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 16:35:47,103 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 16:35:47,103 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 16:35:47,103 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 16:35:47,103 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 16:35:47,104 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 16:35:47,366 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 16:35:47,394 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 16:35:47,396 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 16:35:47,398 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 16:35:47,398 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 16:35:47,400 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem03_label20.c [2023-04-02 16:35:48,593 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 16:35:48,897 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 16:35:48,897 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label20.c [2023-04-02 16:35:48,915 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8d4e4c089/bcbd00206ff041189a0ce916b3b43c05/FLAG247c79337 [2023-04-02 16:35:48,932 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8d4e4c089/bcbd00206ff041189a0ce916b3b43c05 [2023-04-02 16:35:48,934 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 16:35:48,936 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 16:35:48,937 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 16:35:48,938 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 16:35:48,940 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 16:35:48,941 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 04:35:48" (1/1) ... [2023-04-02 16:35:48,942 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6476f975 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:35:48, skipping insertion in model container [2023-04-02 16:35:48,943 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 04:35:48" (1/1) ... [2023-04-02 16:35:48,949 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 16:35:49,025 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 16:35:49,548 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/eca-rers2012/Problem03_label20.c[60555,60568] [2023-04-02 16:35:49,571 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 16:35:49,582 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 16:35:49,838 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/eca-rers2012/Problem03_label20.c[60555,60568] [2023-04-02 16:35:49,845 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 16:35:49,861 INFO L208 MainTranslator]: Completed translation [2023-04-02 16:35:49,861 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:35:49 WrapperNode [2023-04-02 16:35:49,861 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 16:35:49,862 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 16:35:49,862 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 16:35:49,863 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 16:35:49,873 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:35:49" (1/1) ... [2023-04-02 16:35:49,873 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:35:49" (1/1) ... [2023-04-02 16:35:49,903 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:35:49" (1/1) ... [2023-04-02 16:35:49,903 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:35:49" (1/1) ... [2023-04-02 16:35:49,972 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:35:49" (1/1) ... [2023-04-02 16:35:49,981 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:35:49" (1/1) ... [2023-04-02 16:35:49,990 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:35:49" (1/1) ... [2023-04-02 16:35:50,004 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:35:49" (1/1) ... [2023-04-02 16:35:50,019 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 16:35:50,020 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 16:35:50,020 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 16:35:50,021 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 16:35:50,022 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:35:49" (1/1) ... [2023-04-02 16:35:50,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 16:35:50,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 16:35:50,058 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) [2023-04-02 16:35:50,090 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 [2023-04-02 16:35:50,105 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 16:35:50,105 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 16:35:50,105 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 16:35:50,105 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-02 16:35:50,106 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 16:35:50,106 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-02 16:35:50,106 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 16:35:50,106 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 16:35:50,106 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 16:35:50,106 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 16:35:50,106 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-02 16:35:50,106 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-02 16:35:50,106 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 16:35:50,106 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 16:35:50,107 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 16:35:50,107 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 16:35:50,107 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 16:35:50,107 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 16:35:50,107 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 16:35:50,206 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 16:35:50,208 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 16:35:51,741 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 16:35:52,050 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 16:35:52,051 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-02 16:35:52,053 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 04:35:52 BoogieIcfgContainer [2023-04-02 16:35:52,054 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 16:35:52,056 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 16:35:52,056 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 16:35:52,058 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 16:35:52,059 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 04:35:48" (1/3) ... [2023-04-02 16:35:52,059 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47bd56f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 04:35:52, skipping insertion in model container [2023-04-02 16:35:52,059 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:35:49" (2/3) ... [2023-04-02 16:35:52,059 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47bd56f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 04:35:52, skipping insertion in model container [2023-04-02 16:35:52,060 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 04:35:52" (3/3) ... [2023-04-02 16:35:52,061 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label20.c [2023-04-02 16:35:52,077 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 16:35:52,077 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 16:35:52,119 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 16:35:52,125 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;@1a599fac, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 16:35:52,125 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 16:35:52,131 INFO L276 IsEmpty]: Start isEmpty. Operand has 158 states, 150 states have (on average 1.9466666666666668) internal successors, (292), 151 states have internal predecessors, (292), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 16:35:52,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2023-04-02 16:35:52,142 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 16:35:52,143 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 16:35:52,143 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 16:35:52,147 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 16:35:52,148 INFO L85 PathProgramCache]: Analyzing trace with hash 597542646, now seen corresponding path program 1 times [2023-04-02 16:35:52,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 16:35:52,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561707701] [2023-04-02 16:35:52,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 16:35:52,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 16:35:52,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 16:35:53,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 16:35:53,359 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 16:35:53,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561707701] [2023-04-02 16:35:53,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561707701] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 16:35:53,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 16:35:53,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 16:35:53,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465573493] [2023-04-02 16:35:53,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 16:35:53,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 16:35:53,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 16:35:53,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 16:35:53,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 16:35:53,408 INFO L87 Difference]: Start difference. First operand has 158 states, 150 states have (on average 1.9466666666666668) internal successors, (292), 151 states have internal predecessors, (292), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 2 states have internal predecessors, (145), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 16:35:54,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 16:35:54,184 INFO L93 Difference]: Finished difference Result 462 states and 886 transitions. [2023-04-02 16:35:54,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 16:35:54,190 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 2 states have internal predecessors, (145), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 149 [2023-04-02 16:35:54,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 16:35:54,210 INFO L225 Difference]: With dead ends: 462 [2023-04-02 16:35:54,210 INFO L226 Difference]: Without dead ends: 301 [2023-04-02 16:35:54,214 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 16:35:54,217 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 55 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-02 16:35:54,218 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 36 Invalid, 588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 489 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-02 16:35:54,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2023-04-02 16:35:54,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 301. [2023-04-02 16:35:54,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 293 states have (on average 1.89419795221843) internal successors, (555), 293 states have internal predecessors, (555), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-04-02 16:35:54,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 564 transitions. [2023-04-02 16:35:54,279 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 564 transitions. Word has length 149 [2023-04-02 16:35:54,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 16:35:54,280 INFO L495 AbstractCegarLoop]: Abstraction has 301 states and 564 transitions. [2023-04-02 16:35:54,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 2 states have internal predecessors, (145), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 16:35:54,280 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 564 transitions. [2023-04-02 16:35:54,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2023-04-02 16:35:54,284 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 16:35:54,285 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 16:35:54,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 16:35:54,285 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 16:35:54,286 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 16:35:54,286 INFO L85 PathProgramCache]: Analyzing trace with hash 15717296, now seen corresponding path program 1 times [2023-04-02 16:35:54,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 16:35:54,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602703137] [2023-04-02 16:35:54,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 16:35:54,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 16:35:54,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 16:35:54,848 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 16:35:54,848 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 16:35:54,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602703137] [2023-04-02 16:35:54,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602703137] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 16:35:54,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 16:35:54,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 16:35:54,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194333827] [2023-04-02 16:35:54,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 16:35:54,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 16:35:54,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 16:35:54,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 16:35:54,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 16:35:54,854 INFO L87 Difference]: Start difference. First operand 301 states and 564 transitions. Second operand has 5 states, 5 states have (on average 30.4) internal successors, (152), 4 states have internal predecessors, (152), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 16:35:55,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 16:35:55,334 INFO L93 Difference]: Finished difference Result 913 states and 1729 transitions. [2023-04-02 16:35:55,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 16:35:55,336 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.4) internal successors, (152), 4 states have internal predecessors, (152), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 158 [2023-04-02 16:35:55,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 16:35:55,341 INFO L225 Difference]: With dead ends: 913 [2023-04-02 16:35:55,341 INFO L226 Difference]: Without dead ends: 617 [2023-04-02 16:35:55,343 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-04-02 16:35:55,344 INFO L413 NwaCegarLoop]: 181 mSDtfsCounter, 773 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 773 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 16:35:55,344 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [773 Valid, 529 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 338 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 16:35:55,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2023-04-02 16:35:55,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 603. [2023-04-02 16:35:55,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 603 states, 587 states have (on average 1.8824531516183987) internal successors, (1105), 591 states have internal predecessors, (1105), 6 states have call successors, (6), 6 states have call predecessors, (6), 9 states have return successors, (23), 5 states have call predecessors, (23), 5 states have call successors, (23) [2023-04-02 16:35:55,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 1134 transitions. [2023-04-02 16:35:55,383 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 1134 transitions. Word has length 158 [2023-04-02 16:35:55,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 16:35:55,384 INFO L495 AbstractCegarLoop]: Abstraction has 603 states and 1134 transitions. [2023-04-02 16:35:55,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.4) internal successors, (152), 4 states have internal predecessors, (152), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 16:35:55,384 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 1134 transitions. [2023-04-02 16:35:55,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2023-04-02 16:35:55,389 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 16:35:55,389 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 16:35:55,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-02 16:35:55,390 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 16:35:55,390 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 16:35:55,390 INFO L85 PathProgramCache]: Analyzing trace with hash -848539947, now seen corresponding path program 1 times [2023-04-02 16:35:55,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 16:35:55,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3001697] [2023-04-02 16:35:55,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 16:35:55,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 16:35:55,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 16:35:55,754 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 16:35:55,755 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 16:35:55,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3001697] [2023-04-02 16:35:55,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3001697] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 16:35:55,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 16:35:55,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 16:35:55,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213352971] [2023-04-02 16:35:55,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 16:35:55,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 16:35:55,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 16:35:55,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 16:35:55,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 16:35:55,760 INFO L87 Difference]: Start difference. First operand 603 states and 1134 transitions. Second operand has 5 states, 5 states have (on average 31.0) internal successors, (155), 4 states have internal predecessors, (155), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 16:35:56,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 16:35:56,646 INFO L93 Difference]: Finished difference Result 1861 states and 3585 transitions. [2023-04-02 16:35:56,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-02 16:35:56,648 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.0) internal successors, (155), 4 states have internal predecessors, (155), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 161 [2023-04-02 16:35:56,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 16:35:56,656 INFO L225 Difference]: With dead ends: 1861 [2023-04-02 16:35:56,656 INFO L226 Difference]: Without dead ends: 1263 [2023-04-02 16:35:56,658 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-04-02 16:35:56,659 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 493 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 872 mSolverCounterSat, 255 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 493 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 1127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 255 IncrementalHoareTripleChecker+Valid, 872 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-04-02 16:35:56,659 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [493 Valid, 44 Invalid, 1127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [255 Valid, 872 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-04-02 16:35:56,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1263 states. [2023-04-02 16:35:56,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1263 to 1231. [2023-04-02 16:35:56,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1231 states, 1187 states have (on average 1.818871103622578) internal successors, (2159), 1211 states have internal predecessors, (2159), 10 states have call successors, (10), 10 states have call predecessors, (10), 33 states have return successors, (115), 9 states have call predecessors, (115), 9 states have call successors, (115) [2023-04-02 16:35:56,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1231 states to 1231 states and 2284 transitions. [2023-04-02 16:35:56,729 INFO L78 Accepts]: Start accepts. Automaton has 1231 states and 2284 transitions. Word has length 161 [2023-04-02 16:35:56,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 16:35:56,730 INFO L495 AbstractCegarLoop]: Abstraction has 1231 states and 2284 transitions. [2023-04-02 16:35:56,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.0) internal successors, (155), 4 states have internal predecessors, (155), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 16:35:56,730 INFO L276 IsEmpty]: Start isEmpty. Operand 1231 states and 2284 transitions. [2023-04-02 16:35:56,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2023-04-02 16:35:56,739 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 16:35:56,739 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 16:35:56,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-02 16:35:56,739 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 16:35:56,741 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 16:35:56,741 INFO L85 PathProgramCache]: Analyzing trace with hash 973406440, now seen corresponding path program 1 times [2023-04-02 16:35:56,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 16:35:56,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514811876] [2023-04-02 16:35:56,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 16:35:56,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 16:35:56,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 16:35:57,177 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 16:35:57,178 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 16:35:57,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514811876] [2023-04-02 16:35:57,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514811876] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 16:35:57,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 16:35:57,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 16:35:57,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488823744] [2023-04-02 16:35:57,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 16:35:57,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 16:35:57,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 16:35:57,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 16:35:57,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 16:35:57,180 INFO L87 Difference]: Start difference. First operand 1231 states and 2284 transitions. Second operand has 5 states, 5 states have (on average 31.2) internal successors, (156), 4 states have internal predecessors, (156), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 16:35:58,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 16:35:58,048 INFO L93 Difference]: Finished difference Result 3841 states and 7497 transitions. [2023-04-02 16:35:58,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-02 16:35:58,049 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.2) internal successors, (156), 4 states have internal predecessors, (156), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 162 [2023-04-02 16:35:58,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 16:35:58,063 INFO L225 Difference]: With dead ends: 3841 [2023-04-02 16:35:58,063 INFO L226 Difference]: Without dead ends: 2615 [2023-04-02 16:35:58,068 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-04-02 16:35:58,069 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 558 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 867 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 558 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 992 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 867 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-04-02 16:35:58,069 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [558 Valid, 44 Invalid, 992 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 867 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-04-02 16:35:58,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2615 states. [2023-04-02 16:35:58,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2615 to 2565. [2023-04-02 16:35:58,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2565 states, 2426 states have (on average 1.6760098928276999) internal successors, (4066), 2529 states have internal predecessors, (4066), 18 states have call successors, (18), 18 states have call predecessors, (18), 120 states have return successors, (438), 17 states have call predecessors, (438), 17 states have call successors, (438) [2023-04-02 16:35:58,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2565 states to 2565 states and 4522 transitions. [2023-04-02 16:35:58,190 INFO L78 Accepts]: Start accepts. Automaton has 2565 states and 4522 transitions. Word has length 162 [2023-04-02 16:35:58,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 16:35:58,191 INFO L495 AbstractCegarLoop]: Abstraction has 2565 states and 4522 transitions. [2023-04-02 16:35:58,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.2) internal successors, (156), 4 states have internal predecessors, (156), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 16:35:58,191 INFO L276 IsEmpty]: Start isEmpty. Operand 2565 states and 4522 transitions. [2023-04-02 16:35:58,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2023-04-02 16:35:58,199 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 16:35:58,199 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 16:35:58,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-02 16:35:58,200 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 16:35:58,201 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 16:35:58,201 INFO L85 PathProgramCache]: Analyzing trace with hash 1089874609, now seen corresponding path program 1 times [2023-04-02 16:35:58,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 16:35:58,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397625061] [2023-04-02 16:35:58,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 16:35:58,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 16:35:58,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 16:35:58,939 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 16:35:58,939 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 16:35:58,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397625061] [2023-04-02 16:35:58,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397625061] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 16:35:58,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 16:35:58,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 16:35:58,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995322507] [2023-04-02 16:35:58,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 16:35:58,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 16:35:58,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 16:35:58,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 16:35:58,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 16:35:58,944 INFO L87 Difference]: Start difference. First operand 2565 states and 4522 transitions. Second operand has 5 states, 5 states have (on average 31.4) internal successors, (157), 4 states have internal predecessors, (157), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 16:35:59,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 16:35:59,860 INFO L93 Difference]: Finished difference Result 6549 states and 11823 transitions. [2023-04-02 16:35:59,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-02 16:35:59,861 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 4 states have internal predecessors, (157), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 163 [2023-04-02 16:35:59,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 16:35:59,883 INFO L225 Difference]: With dead ends: 6549 [2023-04-02 16:35:59,884 INFO L226 Difference]: Without dead ends: 3989 [2023-04-02 16:35:59,891 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-04-02 16:35:59,892 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 489 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 866 mSolverCounterSat, 249 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 489 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 1115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 249 IncrementalHoareTripleChecker+Valid, 866 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-04-02 16:35:59,893 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [489 Valid, 46 Invalid, 1115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [249 Valid, 866 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-04-02 16:35:59,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3989 states. [2023-04-02 16:36:00,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3989 to 3891. [2023-04-02 16:36:00,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3891 states, 3661 states have (on average 1.6293362469270691) internal successors, (5965), 3839 states have internal predecessors, (5965), 26 states have call successors, (26), 26 states have call predecessors, (26), 203 states have return successors, (770), 25 states have call predecessors, (770), 25 states have call successors, (770) [2023-04-02 16:36:00,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3891 states to 3891 states and 6761 transitions. [2023-04-02 16:36:00,046 INFO L78 Accepts]: Start accepts. Automaton has 3891 states and 6761 transitions. Word has length 163 [2023-04-02 16:36:00,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 16:36:00,047 INFO L495 AbstractCegarLoop]: Abstraction has 3891 states and 6761 transitions. [2023-04-02 16:36:00,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 4 states have internal predecessors, (157), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 16:36:00,048 INFO L276 IsEmpty]: Start isEmpty. Operand 3891 states and 6761 transitions. [2023-04-02 16:36:00,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2023-04-02 16:36:00,059 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 16:36:00,059 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 16:36:00,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-02 16:36:00,060 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 16:36:00,061 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 16:36:00,061 INFO L85 PathProgramCache]: Analyzing trace with hash 153697112, now seen corresponding path program 1 times [2023-04-02 16:36:00,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 16:36:00,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388297539] [2023-04-02 16:36:00,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 16:36:00,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 16:36:00,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 16:36:01,720 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 16:36:01,721 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 16:36:01,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388297539] [2023-04-02 16:36:01,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388297539] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 16:36:01,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046745558] [2023-04-02 16:36:01,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 16:36:01,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 16:36:01,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 16:36:01,729 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) [2023-04-02 16:36:01,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-02 16:36:01,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 16:36:01,982 INFO L262 TraceCheckSpWp]: Trace formula consists of 911 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-02 16:36:01,993 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 16:36:02,196 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 16:36:02,196 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 16:36:02,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046745558] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 16:36:02,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 16:36:02,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-04-02 16:36:02,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827619292] [2023-04-02 16:36:02,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 16:36:02,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 16:36:02,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 16:36:02,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 16:36:02,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-04-02 16:36:02,199 INFO L87 Difference]: Start difference. First operand 3891 states and 6761 transitions. Second operand has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-02 16:36:03,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 16:36:03,067 INFO L93 Difference]: Finished difference Result 11008 states and 19852 transitions. [2023-04-02 16:36:03,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 16:36:03,068 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 170 [2023-04-02 16:36:03,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 16:36:03,113 INFO L225 Difference]: With dead ends: 11008 [2023-04-02 16:36:03,113 INFO L226 Difference]: Without dead ends: 7122 [2023-04-02 16:36:03,126 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-04-02 16:36:03,128 INFO L413 NwaCegarLoop]: 273 mSDtfsCounter, 14 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 483 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-02 16:36:03,129 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 286 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 483 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-02 16:36:03,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7122 states. [2023-04-02 16:36:03,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7122 to 7114. [2023-04-02 16:36:03,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7114 states, 6774 states have (on average 1.5490109241216417) internal successors, (10493), 7020 states have internal predecessors, (10493), 47 states have call successors, (47), 47 states have call predecessors, (47), 292 states have return successors, (1610), 46 states have call predecessors, (1610), 46 states have call successors, (1610) [2023-04-02 16:36:03,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7114 states to 7114 states and 12150 transitions. [2023-04-02 16:36:03,380 INFO L78 Accepts]: Start accepts. Automaton has 7114 states and 12150 transitions. Word has length 170 [2023-04-02 16:36:03,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 16:36:03,381 INFO L495 AbstractCegarLoop]: Abstraction has 7114 states and 12150 transitions. [2023-04-02 16:36:03,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-02 16:36:03,382 INFO L276 IsEmpty]: Start isEmpty. Operand 7114 states and 12150 transitions. [2023-04-02 16:36:03,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2023-04-02 16:36:03,400 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 16:36:03,400 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 16:36:03,412 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-02 16:36:03,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-04-02 16:36:03,610 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 16:36:03,610 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 16:36:03,611 INFO L85 PathProgramCache]: Analyzing trace with hash -165278106, now seen corresponding path program 1 times [2023-04-02 16:36:03,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 16:36:03,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135923102] [2023-04-02 16:36:03,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 16:36:03,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 16:36:03,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 16:36:04,278 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 16:36:04,279 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 16:36:04,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135923102] [2023-04-02 16:36:04,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135923102] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 16:36:04,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 16:36:04,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 16:36:04,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683965924] [2023-04-02 16:36:04,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 16:36:04,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 16:36:04,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 16:36:04,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 16:36:04,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 16:36:04,281 INFO L87 Difference]: Start difference. First operand 7114 states and 12150 transitions. Second operand has 5 states, 5 states have (on average 35.0) internal successors, (175), 4 states have internal predecessors, (175), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 16:36:05,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 16:36:05,435 INFO L93 Difference]: Finished difference Result 16768 states and 28701 transitions. [2023-04-02 16:36:05,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-02 16:36:05,436 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 35.0) internal successors, (175), 4 states have internal predecessors, (175), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 181 [2023-04-02 16:36:05,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 16:36:05,497 INFO L225 Difference]: With dead ends: 16768 [2023-04-02 16:36:05,497 INFO L226 Difference]: Without dead ends: 9659 [2023-04-02 16:36:05,518 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-04-02 16:36:05,520 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 437 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 986 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 437 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 1179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 986 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-04-02 16:36:05,520 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [437 Valid, 46 Invalid, 1179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 986 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-04-02 16:36:05,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9659 states. [2023-04-02 16:36:05,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9659 to 9589. [2023-04-02 16:36:05,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9589 states, 9084 states have (on average 1.5308234258036106) internal successors, (13906), 9465 states have internal predecessors, (13906), 62 states have call successors, (62), 62 states have call predecessors, (62), 442 states have return successors, (2271), 61 states have call predecessors, (2271), 61 states have call successors, (2271) [2023-04-02 16:36:05,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9589 states to 9589 states and 16239 transitions. [2023-04-02 16:36:05,845 INFO L78 Accepts]: Start accepts. Automaton has 9589 states and 16239 transitions. Word has length 181 [2023-04-02 16:36:05,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 16:36:05,845 INFO L495 AbstractCegarLoop]: Abstraction has 9589 states and 16239 transitions. [2023-04-02 16:36:05,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 35.0) internal successors, (175), 4 states have internal predecessors, (175), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 16:36:05,846 INFO L276 IsEmpty]: Start isEmpty. Operand 9589 states and 16239 transitions. [2023-04-02 16:36:05,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2023-04-02 16:36:05,871 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 16:36:05,871 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 16:36:05,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-02 16:36:05,872 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 16:36:05,872 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 16:36:05,872 INFO L85 PathProgramCache]: Analyzing trace with hash 271444280, now seen corresponding path program 1 times [2023-04-02 16:36:05,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 16:36:05,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423503385] [2023-04-02 16:36:05,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 16:36:05,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 16:36:05,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 16:36:06,298 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 16:36:06,299 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 16:36:06,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423503385] [2023-04-02 16:36:06,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423503385] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 16:36:06,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 16:36:06,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 16:36:06,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285515668] [2023-04-02 16:36:06,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 16:36:06,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 16:36:06,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 16:36:06,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 16:36:06,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 16:36:06,306 INFO L87 Difference]: Start difference. First operand 9589 states and 16239 transitions. Second operand has 5 states, 5 states have (on average 36.0) internal successors, (180), 4 states have internal predecessors, (180), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 16:36:07,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 16:36:07,398 INFO L93 Difference]: Finished difference Result 24677 states and 44903 transitions. [2023-04-02 16:36:07,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-02 16:36:07,399 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 36.0) internal successors, (180), 4 states have internal predecessors, (180), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 186 [2023-04-02 16:36:07,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 16:36:07,481 INFO L225 Difference]: With dead ends: 24677 [2023-04-02 16:36:07,482 INFO L226 Difference]: Without dead ends: 15093 [2023-04-02 16:36:07,513 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-04-02 16:36:07,514 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 509 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 875 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 509 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 1026 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 875 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-04-02 16:36:07,514 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [509 Valid, 45 Invalid, 1026 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 875 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-04-02 16:36:07,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15093 states. [2023-04-02 16:36:08,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15093 to 14867. [2023-04-02 16:36:08,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14867 states, 14011 states have (on average 1.4963956891014203) internal successors, (20966), 14679 states have internal predecessors, (20966), 94 states have call successors, (94), 94 states have call predecessors, (94), 761 states have return successors, (4005), 93 states have call predecessors, (4005), 93 states have call successors, (4005) [2023-04-02 16:36:08,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14867 states to 14867 states and 25065 transitions. [2023-04-02 16:36:08,180 INFO L78 Accepts]: Start accepts. Automaton has 14867 states and 25065 transitions. Word has length 186 [2023-04-02 16:36:08,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 16:36:08,181 INFO L495 AbstractCegarLoop]: Abstraction has 14867 states and 25065 transitions. [2023-04-02 16:36:08,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 36.0) internal successors, (180), 4 states have internal predecessors, (180), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 16:36:08,181 INFO L276 IsEmpty]: Start isEmpty. Operand 14867 states and 25065 transitions. [2023-04-02 16:36:08,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2023-04-02 16:36:08,216 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 16:36:08,217 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 16:36:08,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-02 16:36:08,217 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 16:36:08,218 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 16:36:08,218 INFO L85 PathProgramCache]: Analyzing trace with hash 1096271292, now seen corresponding path program 1 times [2023-04-02 16:36:08,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 16:36:08,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870538197] [2023-04-02 16:36:08,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 16:36:08,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 16:36:08,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 16:36:09,293 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 38 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 16:36:09,293 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 16:36:09,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870538197] [2023-04-02 16:36:09,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870538197] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 16:36:09,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419233690] [2023-04-02 16:36:09,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 16:36:09,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 16:36:09,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 16:36:09,295 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 16:36:09,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-02 16:36:09,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 16:36:09,552 INFO L262 TraceCheckSpWp]: Trace formula consists of 1072 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-02 16:36:09,559 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 16:36:09,718 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-02 16:36:09,718 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 16:36:09,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419233690] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 16:36:09,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 16:36:09,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2023-04-02 16:36:09,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141895812] [2023-04-02 16:36:09,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 16:36:09,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 16:36:09,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 16:36:09,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 16:36:09,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-04-02 16:36:09,721 INFO L87 Difference]: Start difference. First operand 14867 states and 25065 transitions. Second operand has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 3 states have internal predecessors, (178), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-02 16:36:10,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 16:36:10,603 INFO L93 Difference]: Finished difference Result 41881 states and 73384 transitions. [2023-04-02 16:36:10,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 16:36:10,603 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 3 states have internal predecessors, (178), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 192 [2023-04-02 16:36:10,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 16:36:10,729 INFO L225 Difference]: With dead ends: 41881 [2023-04-02 16:36:10,729 INFO L226 Difference]: Without dead ends: 27019 [2023-04-02 16:36:10,779 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-04-02 16:36:10,781 INFO L413 NwaCegarLoop]: 257 mSDtfsCounter, 9 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-02 16:36:10,782 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 282 Invalid, 586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 432 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-02 16:36:10,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27019 states. [2023-04-02 16:36:11,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27019 to 27019. [2023-04-02 16:36:11,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27019 states, 25807 states have (on average 1.4691362808540318) internal successors, (37914), 26671 states have internal predecessors, (37914), 174 states have call successors, (174), 174 states have call predecessors, (174), 1037 states have return successors, (8580), 173 states have call predecessors, (8580), 173 states have call successors, (8580) [2023-04-02 16:36:11,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27019 states to 27019 states and 46668 transitions. [2023-04-02 16:36:11,604 INFO L78 Accepts]: Start accepts. Automaton has 27019 states and 46668 transitions. Word has length 192 [2023-04-02 16:36:11,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 16:36:11,605 INFO L495 AbstractCegarLoop]: Abstraction has 27019 states and 46668 transitions. [2023-04-02 16:36:11,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 3 states have internal predecessors, (178), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-02 16:36:11,605 INFO L276 IsEmpty]: Start isEmpty. Operand 27019 states and 46668 transitions. [2023-04-02 16:36:11,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2023-04-02 16:36:11,676 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 16:36:11,676 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 16:36:11,688 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-02 16:36:11,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-04-02 16:36:11,886 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 16:36:11,886 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 16:36:11,887 INFO L85 PathProgramCache]: Analyzing trace with hash -1857450131, now seen corresponding path program 1 times [2023-04-02 16:36:11,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 16:36:11,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362418016] [2023-04-02 16:36:11,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 16:36:11,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 16:36:11,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 16:36:12,685 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 92 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 16:36:12,685 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 16:36:12,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362418016] [2023-04-02 16:36:12,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362418016] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 16:36:12,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404732163] [2023-04-02 16:36:12,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 16:36:12,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 16:36:12,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 16:36:12,687 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 16:36:12,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-02 16:36:12,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 16:36:12,926 INFO L262 TraceCheckSpWp]: Trace formula consists of 1123 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-02 16:36:12,931 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 16:36:13,104 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 76 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-04-02 16:36:13,105 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 16:36:13,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404732163] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 16:36:13,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 16:36:13,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2023-04-02 16:36:13,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355328272] [2023-04-02 16:36:13,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 16:36:13,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 16:36:13,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 16:36:13,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 16:36:13,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-04-02 16:36:13,107 INFO L87 Difference]: Start difference. First operand 27019 states and 46668 transitions. Second operand has 3 states, 3 states have (on average 68.0) internal successors, (204), 3 states have internal predecessors, (204), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-02 16:36:14,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 16:36:14,141 INFO L93 Difference]: Finished difference Result 73172 states and 128194 transitions. [2023-04-02 16:36:14,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 16:36:14,142 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.0) internal successors, (204), 3 states have internal predecessors, (204), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 228 [2023-04-02 16:36:14,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 16:36:14,363 INFO L225 Difference]: With dead ends: 73172 [2023-04-02 16:36:14,363 INFO L226 Difference]: Without dead ends: 46158 [2023-04-02 16:36:14,584 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 229 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-04-02 16:36:14,584 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 29 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-02 16:36:14,585 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 91 Invalid, 598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 508 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-02 16:36:14,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46158 states. [2023-04-02 16:36:15,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46158 to 46158. [2023-04-02 16:36:15,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46158 states, 44457 states have (on average 1.4091819061115234) internal successors, (62648), 45556 states have internal predecessors, (62648), 301 states have call successors, (301), 301 states have call predecessors, (301), 1399 states have return successors, (13825), 300 states have call predecessors, (13825), 300 states have call successors, (13825) [2023-04-02 16:36:15,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46158 states to 46158 states and 76774 transitions. [2023-04-02 16:36:15,974 INFO L78 Accepts]: Start accepts. Automaton has 46158 states and 76774 transitions. Word has length 228 [2023-04-02 16:36:15,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 16:36:15,975 INFO L495 AbstractCegarLoop]: Abstraction has 46158 states and 76774 transitions. [2023-04-02 16:36:15,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.0) internal successors, (204), 3 states have internal predecessors, (204), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-02 16:36:15,976 INFO L276 IsEmpty]: Start isEmpty. Operand 46158 states and 76774 transitions. [2023-04-02 16:36:16,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2023-04-02 16:36:16,068 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 16:36:16,068 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-04-02 16:36:16,077 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-02 16:36:16,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 16:36:16,278 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 16:36:16,278 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 16:36:16,279 INFO L85 PathProgramCache]: Analyzing trace with hash 2019942451, now seen corresponding path program 1 times [2023-04-02 16:36:16,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 16:36:16,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473151163] [2023-04-02 16:36:16,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 16:36:16,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 16:36:16,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 16:36:17,528 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 16:36:17,528 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 16:36:17,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473151163] [2023-04-02 16:36:17,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473151163] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 16:36:17,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 16:36:17,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 16:36:17,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12295765] [2023-04-02 16:36:17,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 16:36:17,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 16:36:17,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 16:36:17,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 16:36:17,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 16:36:17,530 INFO L87 Difference]: Start difference. First operand 46158 states and 76774 transitions. Second operand has 5 states, 5 states have (on average 45.8) internal successors, (229), 4 states have internal predecessors, (229), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 16:36:18,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 16:36:18,705 INFO L93 Difference]: Finished difference Result 94623 states and 157850 transitions. [2023-04-02 16:36:18,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 16:36:18,707 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 45.8) internal successors, (229), 4 states have internal predecessors, (229), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 235 [2023-04-02 16:36:18,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 16:36:19,139 INFO L225 Difference]: With dead ends: 94623 [2023-04-02 16:36:19,140 INFO L226 Difference]: Without dead ends: 48470 [2023-04-02 16:36:19,200 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-02 16:36:19,201 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 287 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 1131 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 1204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 1131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-02 16:36:19,201 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [287 Valid, 45 Invalid, 1204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 1131 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-02 16:36:19,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48470 states. [2023-04-02 16:36:20,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48470 to 48446. [2023-04-02 16:36:20,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48446 states, 46602 states have (on average 1.4013561649714605) internal successors, (65306), 47816 states have internal predecessors, (65306), 315 states have call successors, (315), 315 states have call predecessors, (315), 1528 states have return successors, (14879), 314 states have call predecessors, (14879), 314 states have call successors, (14879) [2023-04-02 16:36:20,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48446 states to 48446 states and 80500 transitions. [2023-04-02 16:36:20,472 INFO L78 Accepts]: Start accepts. Automaton has 48446 states and 80500 transitions. Word has length 235 [2023-04-02 16:36:20,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 16:36:20,473 INFO L495 AbstractCegarLoop]: Abstraction has 48446 states and 80500 transitions. [2023-04-02 16:36:20,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 45.8) internal successors, (229), 4 states have internal predecessors, (229), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 16:36:20,473 INFO L276 IsEmpty]: Start isEmpty. Operand 48446 states and 80500 transitions. [2023-04-02 16:36:20,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2023-04-02 16:36:20,895 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 16:36:20,895 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-04-02 16:36:20,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-04-02 16:36:20,895 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 16:36:20,896 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 16:36:20,896 INFO L85 PathProgramCache]: Analyzing trace with hash 1899273, now seen corresponding path program 1 times [2023-04-02 16:36:20,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 16:36:20,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012463601] [2023-04-02 16:36:20,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 16:36:20,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 16:36:20,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 16:36:21,823 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 92 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 16:36:21,823 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 16:36:21,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012463601] [2023-04-02 16:36:21,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012463601] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 16:36:21,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169463222] [2023-04-02 16:36:21,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 16:36:21,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 16:36:21,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 16:36:21,829 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 16:36:21,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-02 16:36:22,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 16:36:22,070 INFO L262 TraceCheckSpWp]: Trace formula consists of 1132 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-02 16:36:22,075 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 16:36:22,206 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 100 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 16:36:22,206 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 16:36:22,491 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 100 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 16:36:22,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169463222] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 16:36:22,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [242749078] [2023-04-02 16:36:22,517 INFO L159 IcfgInterpreter]: Started Sifa with 153 locations of interest [2023-04-02 16:36:22,517 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 16:36:22,520 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 16:36:22,525 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 16:36:22,525 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 16:36:23,353 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 162 for LOIs [2023-04-02 16:36:32,360 WARN L223 SmtUtils]: Spent 7.79s on a formula simplification that was a NOOP. DAG size: 962 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2023-04-02 16:37:18,852 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 24864 conjuctions. This might take some time... [2023-04-02 16:37:46,911 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 24864 conjuctions.