/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/Problem12_label33.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 19:21:28,994 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 19:21:28,996 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 19:21:29,033 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 19:21:29,033 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 19:21:29,035 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 19:21:29,037 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 19:21:29,039 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 19:21:29,040 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 19:21:29,053 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 19:21:29,054 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 19:21:29,055 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 19:21:29,055 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 19:21:29,055 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 19:21:29,056 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 19:21:29,056 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 19:21:29,057 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 19:21:29,057 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 19:21:29,058 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 19:21:29,059 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 19:21:29,060 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 19:21:29,061 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 19:21:29,061 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 19:21:29,062 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 19:21:29,064 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-02 19:21:29,066 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 19:21:29,066 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 19:21:29,066 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 19:21:29,067 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 19:21:29,067 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 19:21:29,067 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 19:21:29,068 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 19:21:29,068 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 19:21:29,068 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 19:21:29,069 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 19:21:29,069 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 19:21:29,073 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 19:21:29,099 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 19:21:29,100 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 19:21:29,100 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 19:21:29,100 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 19:21:29,101 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 19:21:29,101 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 19:21:29,101 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 19:21:29,101 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 19:21:29,101 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 19:21:29,101 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 19:21:29,102 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 19:21:29,102 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 19:21:29,102 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 19:21:29,102 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 19:21:29,102 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 19:21:29,102 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 19:21:29,103 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 19:21:29,103 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 19:21:29,103 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 19:21:29,103 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 19:21:29,103 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 19:21:29,103 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 19:21:29,104 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 19:21:29,104 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 19:21:29,104 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 19:21:29,104 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 19:21:29,104 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 19:21:29,104 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 19:21:29,104 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 19:21:29,104 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 19:21:29,104 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 19:21:29,105 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 19:21:29,105 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 19:21:29,105 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 19:21:29,105 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 19:21:29,105 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 19:21:29,105 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 19:21:29,105 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 19:21:29,105 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 19:21:29,105 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 19:21:29,105 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 19:21:29,105 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 19:21:29,291 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 19:21:29,310 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 19:21:29,311 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 19:21:29,312 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 19:21:29,312 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 19:21:29,313 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem12_label33.c [2023-04-02 19:21:30,282 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 19:21:30,663 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 19:21:30,663 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label33.c [2023-04-02 19:21:30,690 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/635b3bb41/15109a60cb4a410cbe00e0578229431e/FLAGce05883c5 [2023-04-02 19:21:30,705 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/635b3bb41/15109a60cb4a410cbe00e0578229431e [2023-04-02 19:21:30,707 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 19:21:30,709 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 19:21:30,711 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 19:21:30,711 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 19:21:30,713 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 19:21:30,714 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 07:21:30" (1/1) ... [2023-04-02 19:21:30,714 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b045cc3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:21:30, skipping insertion in model container [2023-04-02 19:21:30,715 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 07:21:30" (1/1) ... [2023-04-02 19:21:30,719 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 19:21:30,803 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 19:21:31,019 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/Problem12_label33.c[6146,6159] [2023-04-02 19:21:31,578 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 19:21:31,587 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 19:21:31,610 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/Problem12_label33.c[6146,6159] [2023-04-02 19:21:31,893 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 19:21:31,911 INFO L208 MainTranslator]: Completed translation [2023-04-02 19:21:31,912 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:21:31 WrapperNode [2023-04-02 19:21:31,912 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 19:21:31,913 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 19:21:31,913 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 19:21:31,913 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 19:21:31,922 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:21:31" (1/1) ... [2023-04-02 19:21:31,922 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:21:31" (1/1) ... [2023-04-02 19:21:31,965 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:21:31" (1/1) ... [2023-04-02 19:21:31,965 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:21:31" (1/1) ... [2023-04-02 19:21:32,069 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:21:31" (1/1) ... [2023-04-02 19:21:32,089 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:21:31" (1/1) ... [2023-04-02 19:21:32,104 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:21:31" (1/1) ... [2023-04-02 19:21:32,115 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:21:31" (1/1) ... [2023-04-02 19:21:32,138 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 19:21:32,139 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 19:21:32,139 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 19:21:32,140 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 19:21:32,141 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:21:31" (1/1) ... [2023-04-02 19:21:32,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 19:21:32,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 19:21:32,164 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 19:21:32,183 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 19:21:32,206 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 19:21:32,206 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 19:21:32,206 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 19:21:32,206 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-02 19:21:32,206 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-02 19:21:32,207 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-04-02 19:21:32,207 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-04-02 19:21:32,207 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 19:21:32,207 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-02 19:21:32,207 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-02 19:21:32,207 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-04-02 19:21:32,207 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-04-02 19:21:32,207 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 19:21:32,207 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 19:21:32,207 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 19:21:32,207 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 19:21:32,207 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-02 19:21:32,208 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-02 19:21:32,208 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 19:21:32,208 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 19:21:32,208 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 19:21:32,208 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 19:21:32,208 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 19:21:32,208 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 19:21:32,208 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 19:21:32,286 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 19:21:32,288 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 19:21:35,225 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 19:21:35,701 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 19:21:35,701 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-02 19:21:35,706 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 07:21:35 BoogieIcfgContainer [2023-04-02 19:21:35,706 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 19:21:35,708 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 19:21:35,708 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 19:21:35,711 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 19:21:35,711 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 07:21:30" (1/3) ... [2023-04-02 19:21:35,711 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1259487e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 07:21:35, skipping insertion in model container [2023-04-02 19:21:35,711 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:21:31" (2/3) ... [2023-04-02 19:21:35,711 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1259487e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 07:21:35, skipping insertion in model container [2023-04-02 19:21:35,711 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 07:21:35" (3/3) ... [2023-04-02 19:21:35,712 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem12_label33.c [2023-04-02 19:21:35,725 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 19:21:35,726 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 19:21:35,778 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 19:21:35,783 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;@606ae153, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 19:21:35,783 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 19:21:35,790 INFO L276 IsEmpty]: Start isEmpty. Operand has 694 states, 680 states have (on average 1.9764705882352942) internal successors, (1344), 681 states have internal predecessors, (1344), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-02 19:21:35,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-02 19:21:35,795 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 19:21:35,795 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 19:21:35,796 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 19:21:35,800 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 19:21:35,800 INFO L85 PathProgramCache]: Analyzing trace with hash 636344577, now seen corresponding path program 1 times [2023-04-02 19:21:35,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 19:21:35,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536637940] [2023-04-02 19:21:35,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 19:21:35,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 19:21:35,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 19:21:36,110 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 19:21:36,111 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 19:21:36,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536637940] [2023-04-02 19:21:36,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536637940] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 19:21:36,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 19:21:36,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 19:21:36,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353961933] [2023-04-02 19:21:36,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 19:21:36,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 19:21:36,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 19:21:36,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 19:21:36,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 19:21:36,148 INFO L87 Difference]: Start difference. First operand has 694 states, 680 states have (on average 1.9764705882352942) internal successors, (1344), 681 states have internal predecessors, (1344), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) 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 19:21:38,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 19:21:38,993 INFO L93 Difference]: Finished difference Result 2068 states and 4065 transitions. [2023-04-02 19:21:39,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 19:21:39,010 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 19:21:39,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 19:21:39,039 INFO L225 Difference]: With dead ends: 2068 [2023-04-02 19:21:39,040 INFO L226 Difference]: Without dead ends: 1371 [2023-04-02 19:21:39,045 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 19:21:39,047 INFO L413 NwaCegarLoop]: 473 mSDtfsCounter, 725 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 2073 mSolverCounterSat, 632 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 725 SdHoareTripleChecker+Valid, 498 SdHoareTripleChecker+Invalid, 2705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 632 IncrementalHoareTripleChecker+Valid, 2073 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-04-02 19:21:39,048 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [725 Valid, 498 Invalid, 2705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [632 Valid, 2073 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2023-04-02 19:21:39,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1371 states. [2023-04-02 19:21:39,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1371 to 1368. [2023-04-02 19:21:39,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1368 states, 1350 states have (on average 1.6511111111111112) internal successors, (2229), 1350 states have internal predecessors, (2229), 9 states have call successors, (9), 9 states have call predecessors, (9), 8 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2023-04-02 19:21:39,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1368 states to 1368 states and 2252 transitions. [2023-04-02 19:21:39,201 INFO L78 Accepts]: Start accepts. Automaton has 1368 states and 2252 transitions. Word has length 11 [2023-04-02 19:21:39,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 19:21:39,202 INFO L495 AbstractCegarLoop]: Abstraction has 1368 states and 2252 transitions. [2023-04-02 19:21:39,202 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 19:21:39,202 INFO L276 IsEmpty]: Start isEmpty. Operand 1368 states and 2252 transitions. [2023-04-02 19:21:39,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-04-02 19:21:39,203 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 19:21:39,204 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] [2023-04-02 19:21:39,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 19:21:39,204 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 19:21:39,204 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 19:21:39,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1596164048, now seen corresponding path program 1 times [2023-04-02 19:21:39,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 19:21:39,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346037258] [2023-04-02 19:21:39,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 19:21:39,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 19:21:39,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 19:21:39,384 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 19:21:39,385 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 19:21:39,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346037258] [2023-04-02 19:21:39,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346037258] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 19:21:39,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 19:21:39,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 19:21:39,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087538495] [2023-04-02 19:21:39,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 19:21:39,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 19:21:39,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 19:21:39,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 19:21:39,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-02 19:21:39,388 INFO L87 Difference]: Start difference. First operand 1368 states and 2252 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 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 19:21:43,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 19:21:43,004 INFO L93 Difference]: Finished difference Result 4148 states and 6855 transitions. [2023-04-02 19:21:43,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 19:21:43,004 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 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 31 [2023-04-02 19:21:43,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 19:21:43,014 INFO L225 Difference]: With dead ends: 4148 [2023-04-02 19:21:43,015 INFO L226 Difference]: Without dead ends: 2785 [2023-04-02 19:21:43,017 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-04-02 19:21:43,018 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 2645 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 4201 mSolverCounterSat, 670 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2645 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 4871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 670 IncrementalHoareTripleChecker+Valid, 4201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2023-04-02 19:21:43,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2645 Valid, 89 Invalid, 4871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [670 Valid, 4201 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2023-04-02 19:21:43,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2785 states. [2023-04-02 19:21:43,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2785 to 2756. [2023-04-02 19:21:43,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2756 states, 2714 states have (on average 1.4896831245394253) internal successors, (4043), 2718 states have internal predecessors, (4043), 15 states have call successors, (15), 15 states have call predecessors, (15), 26 states have return successors, (62), 22 states have call predecessors, (62), 14 states have call successors, (62) [2023-04-02 19:21:43,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2756 states to 2756 states and 4120 transitions. [2023-04-02 19:21:43,087 INFO L78 Accepts]: Start accepts. Automaton has 2756 states and 4120 transitions. Word has length 31 [2023-04-02 19:21:43,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 19:21:43,087 INFO L495 AbstractCegarLoop]: Abstraction has 2756 states and 4120 transitions. [2023-04-02 19:21:43,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 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 19:21:43,088 INFO L276 IsEmpty]: Start isEmpty. Operand 2756 states and 4120 transitions. [2023-04-02 19:21:43,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-04-02 19:21:43,089 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 19:21:43,089 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, 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 19:21:43,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-02 19:21:43,089 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 19:21:43,090 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 19:21:43,090 INFO L85 PathProgramCache]: Analyzing trace with hash 460180737, now seen corresponding path program 1 times [2023-04-02 19:21:43,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 19:21:43,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720647852] [2023-04-02 19:21:43,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 19:21:43,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 19:21:43,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 19:21:43,263 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 19:21:43,263 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 19:21:43,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720647852] [2023-04-02 19:21:43,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720647852] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 19:21:43,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 19:21:43,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 19:21:43,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113953784] [2023-04-02 19:21:43,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 19:21:43,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 19:21:43,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 19:21:43,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 19:21:43,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 19:21:43,267 INFO L87 Difference]: Start difference. First operand 2756 states and 4120 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 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 19:21:46,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 19:21:46,641 INFO L93 Difference]: Finished difference Result 8417 states and 12813 transitions. [2023-04-02 19:21:46,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 19:21:46,646 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 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 60 [2023-04-02 19:21:46,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 19:21:46,745 INFO L225 Difference]: With dead ends: 8417 [2023-04-02 19:21:46,745 INFO L226 Difference]: Without dead ends: 5666 [2023-04-02 19:21:46,750 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 19:21:46,752 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 2402 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 3760 mSolverCounterSat, 1285 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2402 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 5045 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1285 IncrementalHoareTripleChecker+Valid, 3760 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2023-04-02 19:21:46,752 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2402 Valid, 100 Invalid, 5045 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1285 Valid, 3760 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2023-04-02 19:21:46,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5666 states. [2023-04-02 19:21:46,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5666 to 5604. [2023-04-02 19:21:46,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5604 states, 5486 states have (on average 1.4279985417426175) internal successors, (7834), 5509 states have internal predecessors, (7834), 28 states have call successors, (28), 28 states have call predecessors, (28), 89 states have return successors, (297), 66 states have call predecessors, (297), 27 states have call successors, (297) [2023-04-02 19:21:46,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5604 states to 5604 states and 8159 transitions. [2023-04-02 19:21:46,861 INFO L78 Accepts]: Start accepts. Automaton has 5604 states and 8159 transitions. Word has length 60 [2023-04-02 19:21:46,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 19:21:46,861 INFO L495 AbstractCegarLoop]: Abstraction has 5604 states and 8159 transitions. [2023-04-02 19:21:46,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 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 19:21:46,861 INFO L276 IsEmpty]: Start isEmpty. Operand 5604 states and 8159 transitions. [2023-04-02 19:21:46,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-04-02 19:21:46,863 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 19:21:46,863 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2023-04-02 19:21:46,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-02 19:21:46,863 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 19:21:46,863 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 19:21:46,863 INFO L85 PathProgramCache]: Analyzing trace with hash 2099020188, now seen corresponding path program 1 times [2023-04-02 19:21:46,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 19:21:46,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846288800] [2023-04-02 19:21:46,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 19:21:46,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 19:21:46,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 19:21:47,088 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 19:21:47,088 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 19:21:47,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846288800] [2023-04-02 19:21:47,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846288800] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 19:21:47,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566303984] [2023-04-02 19:21:47,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 19:21:47,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 19:21:47,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 19:21:47,092 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 19:21:47,093 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 19:21:47,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 19:21:47,192 INFO L262 TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-02 19:21:47,198 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 19:21:47,291 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-02 19:21:47,291 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 19:21:47,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566303984] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 19:21:47,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 19:21:47,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-04-02 19:21:47,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521742805] [2023-04-02 19:21:47,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 19:21:47,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 19:21:47,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 19:21:47,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 19:21:47,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-04-02 19:21:47,294 INFO L87 Difference]: Start difference. First operand 5604 states and 8159 transitions. Second operand has 5 states, 5 states have (on average 12.4) internal successors, (62), 4 states have internal predecessors, (62), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 19:21:50,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 19:21:50,801 INFO L93 Difference]: Finished difference Result 17003 states and 25456 transitions. [2023-04-02 19:21:50,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 19:21:50,802 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 4 states have internal predecessors, (62), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 74 [2023-04-02 19:21:50,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 19:21:50,838 INFO L225 Difference]: With dead ends: 17003 [2023-04-02 19:21:50,839 INFO L226 Difference]: Without dead ends: 11404 [2023-04-02 19:21:50,848 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-04-02 19:21:50,849 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 2206 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 4595 mSolverCounterSat, 980 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2206 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 5575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 980 IncrementalHoareTripleChecker+Valid, 4595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2023-04-02 19:21:50,849 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2206 Valid, 92 Invalid, 5575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [980 Valid, 4595 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2023-04-02 19:21:50,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11404 states. [2023-04-02 19:21:51,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11404 to 11316. [2023-04-02 19:21:51,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11316 states, 11031 states have (on average 1.3054120206690236) internal successors, (14400), 11099 states have internal predecessors, (14400), 52 states have call successors, (52), 52 states have call predecessors, (52), 232 states have return successors, (1084), 164 states have call predecessors, (1084), 51 states have call successors, (1084) [2023-04-02 19:21:51,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11316 states to 11316 states and 15536 transitions. [2023-04-02 19:21:51,056 INFO L78 Accepts]: Start accepts. Automaton has 11316 states and 15536 transitions. Word has length 74 [2023-04-02 19:21:51,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 19:21:51,057 INFO L495 AbstractCegarLoop]: Abstraction has 11316 states and 15536 transitions. [2023-04-02 19:21:51,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 4 states have internal predecessors, (62), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 19:21:51,057 INFO L276 IsEmpty]: Start isEmpty. Operand 11316 states and 15536 transitions. [2023-04-02 19:21:51,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-04-02 19:21:51,063 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 19:21:51,063 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-04-02 19:21:51,071 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-02 19:21:51,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 19:21:51,269 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 19:21:51,269 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 19:21:51,269 INFO L85 PathProgramCache]: Analyzing trace with hash -508329275, now seen corresponding path program 1 times [2023-04-02 19:21:51,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 19:21:51,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35603198] [2023-04-02 19:21:51,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 19:21:51,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 19:21:51,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 19:21:51,439 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 33 proven. 20 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-04-02 19:21:51,439 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 19:21:51,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35603198] [2023-04-02 19:21:51,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35603198] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 19:21:51,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720427583] [2023-04-02 19:21:51,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 19:21:51,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 19:21:51,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 19:21:51,443 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 19:21:51,448 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 19:21:51,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 19:21:51,554 INFO L262 TraceCheckSpWp]: Trace formula consists of 592 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-02 19:21:51,558 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 19:21:51,619 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 59 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-02 19:21:51,619 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 19:21:51,753 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 33 proven. 20 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-04-02 19:21:51,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720427583] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 19:21:51,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [581191990] [2023-04-02 19:21:51,773 INFO L159 IcfgInterpreter]: Started Sifa with 50 locations of interest [2023-04-02 19:21:51,774 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 19:21:51,776 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 19:21:51,779 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 19:21:51,779 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 19:21:51,883 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 52 for LOIs [2023-04-02 19:21:52,086 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 43 [2023-04-02 19:21:55,746 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 78543 conjuctions. This might take some time... [2023-04-02 19:22:02,331 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 481 conjuctions. [2023-04-02 19:22:20,934 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 18