/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/Problem15_label23.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 19:59:15,007 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 19:59:15,009 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 19:59:15,031 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 19:59:15,032 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 19:59:15,033 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 19:59:15,036 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 19:59:15,038 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 19:59:15,039 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 19:59:15,042 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 19:59:15,044 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 19:59:15,045 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 19:59:15,045 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 19:59:15,048 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 19:59:15,049 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 19:59:15,050 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 19:59:15,050 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 19:59:15,051 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 19:59:15,053 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 19:59:15,056 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 19:59:15,057 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 19:59:15,058 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 19:59:15,059 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 19:59:15,060 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 19:59:15,066 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-02 19:59:15,066 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-02 19:59:15,066 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-02 19:59:15,067 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-02 19:59:15,067 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-02 19:59:15,068 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-02 19:59:15,068 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 19:59:15,069 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 19:59:15,070 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 19:59:15,070 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 19:59:15,071 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 19:59:15,071 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 19:59:15,071 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 19:59:15,072 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 19:59:15,072 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 19:59:15,072 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 19:59:15,073 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 19:59:15,074 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 19:59:15,102 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 19:59:15,103 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 19:59:15,103 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 19:59:15,103 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 19:59:15,104 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 19:59:15,104 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 19:59:15,104 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 19:59:15,104 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 19:59:15,104 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 19:59:15,104 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 19:59:15,105 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 19:59:15,105 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 19:59:15,105 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 19:59:15,105 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 19:59:15,105 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 19:59:15,105 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 19:59:15,106 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 19:59:15,106 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 19:59:15,106 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 19:59:15,107 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 19:59:15,107 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 19:59:15,107 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 19:59:15,107 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 19:59:15,107 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 19:59:15,107 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 19:59:15,107 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 19:59:15,107 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 19:59:15,108 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 19:59:15,108 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 19:59:15,108 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 19:59:15,108 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 19:59:15,108 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 19:59:15,108 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 19:59:15,108 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 19:59:15,108 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 19:59:15,109 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 19:59:15,109 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 19:59:15,109 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 19:59:15,109 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 19:59:15,109 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 19:59:15,109 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 19:59:15,109 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 19:59:15,293 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 19:59:15,331 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 19:59:15,333 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 19:59:15,334 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 19:59:15,334 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 19:59:15,335 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem15_label23.c [2023-04-02 19:59:16,384 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 19:59:16,653 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 19:59:16,654 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem15_label23.c [2023-04-02 19:59:16,666 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1905f2f7c/656acca205fb4a51b6d413cf251fa040/FLAG51f402e1c [2023-04-02 19:59:16,676 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1905f2f7c/656acca205fb4a51b6d413cf251fa040 [2023-04-02 19:59:16,678 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 19:59:16,679 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 19:59:16,682 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 19:59:16,682 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 19:59:16,684 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 19:59:16,684 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 07:59:16" (1/1) ... [2023-04-02 19:59:16,686 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@228a11f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:59:16, skipping insertion in model container [2023-04-02 19:59:16,686 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 07:59:16" (1/1) ... [2023-04-02 19:59:16,690 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 19:59:16,757 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 19:59:16,922 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/Problem15_label23.c[2237,2250] [2023-04-02 19:59:17,232 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 19:59:17,241 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 19:59:17,262 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/Problem15_label23.c[2237,2250] [2023-04-02 19:59:17,423 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 19:59:17,435 INFO L208 MainTranslator]: Completed translation [2023-04-02 19:59:17,435 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:59:17 WrapperNode [2023-04-02 19:59:17,435 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 19:59:17,436 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 19:59:17,437 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 19:59:17,437 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 19:59:17,445 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:59:17" (1/1) ... [2023-04-02 19:59:17,445 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:59:17" (1/1) ... [2023-04-02 19:59:17,474 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:59:17" (1/1) ... [2023-04-02 19:59:17,475 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:59:17" (1/1) ... [2023-04-02 19:59:17,514 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:59:17" (1/1) ... [2023-04-02 19:59:17,522 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:59:17" (1/1) ... [2023-04-02 19:59:17,541 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:59:17" (1/1) ... [2023-04-02 19:59:17,557 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:59:17" (1/1) ... [2023-04-02 19:59:17,568 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 19:59:17,569 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 19:59:17,570 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 19:59:17,570 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 19:59:17,571 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:59:17" (1/1) ... [2023-04-02 19:59:17,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 19:59:17,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 19:59:17,594 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 19:59:17,614 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 19:59:17,628 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 19:59:17,628 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 19:59:17,628 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 19:59:17,629 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-02 19:59:17,629 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-02 19:59:17,629 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 19:59:17,629 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-02 19:59:17,629 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-02 19:59:17,629 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 19:59:17,629 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 19:59:17,629 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 19:59:17,629 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 19:59:17,629 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-02 19:59:17,630 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-02 19:59:17,630 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 19:59:17,630 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 19:59:17,630 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 19:59:17,630 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 19:59:17,630 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 19:59:17,630 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 19:59:17,630 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 19:59:17,700 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 19:59:17,702 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 19:59:19,512 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 19:59:20,027 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 19:59:20,028 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-02 19:59:20,031 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 07:59:20 BoogieIcfgContainer [2023-04-02 19:59:20,031 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 19:59:20,033 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 19:59:20,034 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 19:59:20,036 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 19:59:20,036 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 07:59:16" (1/3) ... [2023-04-02 19:59:20,037 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@555218e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 07:59:20, skipping insertion in model container [2023-04-02 19:59:20,037 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:59:17" (2/3) ... [2023-04-02 19:59:20,037 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@555218e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 07:59:20, skipping insertion in model container [2023-04-02 19:59:20,037 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 07:59:20" (3/3) ... [2023-04-02 19:59:20,038 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem15_label23.c [2023-04-02 19:59:20,053 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 19:59:20,053 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 19:59:20,103 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 19:59:20,108 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;@2a2b240e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 19:59:20,109 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 19:59:20,113 INFO L276 IsEmpty]: Start isEmpty. Operand has 244 states, 234 states have (on average 1.9572649572649572) internal successors, (458), 235 states have internal predecessors, (458), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-02 19:59:20,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-02 19:59:20,118 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 19:59:20,118 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 19:59:20,119 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 19:59:20,123 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 19:59:20,123 INFO L85 PathProgramCache]: Analyzing trace with hash 468026020, now seen corresponding path program 1 times [2023-04-02 19:59:20,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 19:59:20,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377977426] [2023-04-02 19:59:20,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 19:59:20,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 19:59:20,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 19:59:20,381 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 19:59:20,382 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 19:59:20,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377977426] [2023-04-02 19:59:20,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377977426] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 19:59:20,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 19:59:20,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 19:59:20,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596190368] [2023-04-02 19:59:20,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 19:59:20,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 19:59:20,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 19:59:20,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 19:59:20,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 19:59:20,416 INFO L87 Difference]: Start difference. First operand has 244 states, 234 states have (on average 1.9572649572649572) internal successors, (458), 235 states have internal predecessors, (458), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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 19:59:21,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 19:59:21,885 INFO L93 Difference]: Finished difference Result 718 states and 1389 transitions. [2023-04-02 19:59:21,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 19:59:21,887 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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 11 [2023-04-02 19:59:21,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 19:59:21,896 INFO L225 Difference]: With dead ends: 718 [2023-04-02 19:59:21,897 INFO L226 Difference]: Without dead ends: 471 [2023-04-02 19:59:21,900 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 19:59:21,902 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 240 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 774 mSolverCounterSat, 221 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 995 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 221 IncrementalHoareTripleChecker+Valid, 774 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-04-02 19:59:21,903 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [240 Valid, 48 Invalid, 995 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [221 Valid, 774 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-04-02 19:59:21,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2023-04-02 19:59:21,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 442. [2023-04-02 19:59:21,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 432 states have (on average 1.9305555555555556) internal successors, (834), 432 states have internal predecessors, (834), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-04-02 19:59:21,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 845 transitions. [2023-04-02 19:59:21,947 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 845 transitions. Word has length 11 [2023-04-02 19:59:21,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 19:59:21,947 INFO L495 AbstractCegarLoop]: Abstraction has 442 states and 845 transitions. [2023-04-02 19:59:21,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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 19:59:21,947 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 845 transitions. [2023-04-02 19:59:21,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-02 19:59:21,948 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 19:59:21,948 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 19:59:21,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 19:59:21,949 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 19:59:21,949 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 19:59:21,949 INFO L85 PathProgramCache]: Analyzing trace with hash -1975944626, now seen corresponding path program 1 times [2023-04-02 19:59:21,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 19:59:21,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430759496] [2023-04-02 19:59:21,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 19:59:21,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 19:59:21,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 19:59:22,064 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 19:59:22,064 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 19:59:22,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430759496] [2023-04-02 19:59:22,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430759496] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 19:59:22,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 19:59:22,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 19:59:22,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701825893] [2023-04-02 19:59:22,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 19:59:22,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 19:59:22,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 19:59:22,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 19:59:22,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 19:59:22,067 INFO L87 Difference]: Start difference. First operand 442 states and 845 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 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 19:59:23,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 19:59:23,205 INFO L93 Difference]: Finished difference Result 1314 states and 2536 transitions. [2023-04-02 19:59:23,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 19:59:23,206 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 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 21 [2023-04-02 19:59:23,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 19:59:23,210 INFO L225 Difference]: With dead ends: 1314 [2023-04-02 19:59:23,210 INFO L226 Difference]: Without dead ends: 877 [2023-04-02 19:59:23,211 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 19:59:23,212 INFO L413 NwaCegarLoop]: 158 mSDtfsCounter, 243 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 265 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 927 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 265 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-04-02 19:59:23,212 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [243 Valid, 169 Invalid, 927 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [265 Valid, 662 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-04-02 19:59:23,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 877 states. [2023-04-02 19:59:23,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 877 to 842. [2023-04-02 19:59:23,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 826 states have (on average 1.6004842615012107) internal successors, (1322), 826 states have internal predecessors, (1322), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (19), 7 states have call predecessors, (19), 7 states have call successors, (19) [2023-04-02 19:59:23,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 1349 transitions. [2023-04-02 19:59:23,238 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 1349 transitions. Word has length 21 [2023-04-02 19:59:23,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 19:59:23,238 INFO L495 AbstractCegarLoop]: Abstraction has 842 states and 1349 transitions. [2023-04-02 19:59:23,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 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 19:59:23,239 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 1349 transitions. [2023-04-02 19:59:23,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-04-02 19:59:23,240 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 19:59:23,240 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-02 19:59:23,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-02 19:59:23,240 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 19:59:23,240 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 19:59:23,243 INFO L85 PathProgramCache]: Analyzing trace with hash 147059302, now seen corresponding path program 1 times [2023-04-02 19:59:23,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 19:59:23,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479037220] [2023-04-02 19:59:23,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 19:59:23,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 19:59:23,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 19:59:23,386 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 19:59:23,387 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 19:59:23,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479037220] [2023-04-02 19:59:23,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479037220] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 19:59:23,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 19:59:23,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 19:59:23,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619284802] [2023-04-02 19:59:23,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 19:59:23,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 19:59:23,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 19:59:23,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 19:59:23,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 19:59:23,388 INFO L87 Difference]: Start difference. First operand 842 states and 1349 transitions. Second operand has 5 states, 5 states have (on average 6.4) internal successors, (32), 4 states have internal predecessors, (32), 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 19:59:25,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 19:59:25,137 INFO L93 Difference]: Finished difference Result 2560 states and 4171 transitions. [2023-04-02 19:59:25,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-02 19:59:25,138 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 4 states have internal predecessors, (32), 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 38 [2023-04-02 19:59:25,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 19:59:25,147 INFO L225 Difference]: With dead ends: 2560 [2023-04-02 19:59:25,147 INFO L226 Difference]: Without dead ends: 1723 [2023-04-02 19:59:25,151 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 19:59:25,153 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 814 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 1205 mSolverCounterSat, 469 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 814 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 1674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 469 IncrementalHoareTripleChecker+Valid, 1205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-04-02 19:59:25,155 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [814 Valid, 47 Invalid, 1674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [469 Valid, 1205 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-04-02 19:59:25,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1723 states. [2023-04-02 19:59:25,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1723 to 1380. [2023-04-02 19:59:25,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1380 states, 1344 states have (on average 1.4308035714285714) internal successors, (1923), 1354 states have internal predecessors, (1923), 13 states have call successors, (13), 13 states have call predecessors, (13), 22 states have return successors, (65), 12 states have call predecessors, (65), 12 states have call successors, (65) [2023-04-02 19:59:25,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1380 states to 1380 states and 2001 transitions. [2023-04-02 19:59:25,198 INFO L78 Accepts]: Start accepts. Automaton has 1380 states and 2001 transitions. Word has length 38 [2023-04-02 19:59:25,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 19:59:25,199 INFO L495 AbstractCegarLoop]: Abstraction has 1380 states and 2001 transitions. [2023-04-02 19:59:25,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 4 states have internal predecessors, (32), 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 19:59:25,199 INFO L276 IsEmpty]: Start isEmpty. Operand 1380 states and 2001 transitions. [2023-04-02 19:59:25,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2023-04-02 19:59:25,208 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 19:59:25,209 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:59:25,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-02 19:59:25,209 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 19:59:25,209 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 19:59:25,210 INFO L85 PathProgramCache]: Analyzing trace with hash -1485567112, now seen corresponding path program 1 times [2023-04-02 19:59:25,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 19:59:25,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037911103] [2023-04-02 19:59:25,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 19:59:25,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 19:59:25,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 19:59:25,538 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 39 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 19:59:25,538 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 19:59:25,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037911103] [2023-04-02 19:59:25,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037911103] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 19:59:25,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127717832] [2023-04-02 19:59:25,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 19:59:25,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 19:59:25,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 19:59:25,543 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 19:59:25,544 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 19:59:25,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 19:59:25,656 INFO L262 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-02 19:59:25,661 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 19:59:25,783 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 39 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 19:59:25,784 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 19:59:25,918 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 39 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 19:59:25,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127717832] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 19:59:25,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [784609223] [2023-04-02 19:59:25,936 INFO L159 IcfgInterpreter]: Started Sifa with 148 locations of interest [2023-04-02 19:59:25,937 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 19:59:25,940 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 19:59:25,943 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 19:59:25,944 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 19:59:26,077 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 51 for LOIs [2023-04-02 19:59:26,315 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 11 [2023-04-02 19:59:31,060 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 50