/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_label38.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 20:01:17,208 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 20:01:17,210 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 20:01:17,241 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 20:01:17,242 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 20:01:17,244 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 20:01:17,248 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 20:01:17,250 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 20:01:17,251 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 20:01:17,255 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 20:01:17,256 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 20:01:17,258 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 20:01:17,258 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 20:01:17,260 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 20:01:17,262 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 20:01:17,263 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 20:01:17,264 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 20:01:17,265 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 20:01:17,267 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 20:01:17,271 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 20:01:17,272 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 20:01:17,273 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 20:01:17,274 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 20:01:17,275 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 20:01:17,283 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-02 20:01:17,283 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-02 20:01:17,283 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-02 20:01:17,284 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-02 20:01:17,284 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-02 20:01:17,285 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-02 20:01:17,286 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 20:01:17,286 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 20:01:17,287 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 20:01:17,288 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 20:01:17,288 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 20:01:17,289 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 20:01:17,289 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 20:01:17,289 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 20:01:17,289 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 20:01:17,290 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 20:01:17,291 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 20:01:17,291 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 20:01:17,325 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 20:01:17,326 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 20:01:17,326 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 20:01:17,326 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 20:01:17,327 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 20:01:17,327 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 20:01:17,327 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 20:01:17,327 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 20:01:17,328 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 20:01:17,328 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 20:01:17,328 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 20:01:17,329 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 20:01:17,329 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 20:01:17,329 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 20:01:17,329 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 20:01:17,329 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 20:01:17,329 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 20:01:17,329 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 20:01:17,330 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 20:01:17,330 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 20:01:17,330 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 20:01:17,330 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 20:01:17,330 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 20:01:17,330 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 20:01:17,330 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 20:01:17,331 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 20:01:17,331 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 20:01:17,331 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 20:01:17,331 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 20:01:17,331 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 20:01:17,331 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 20:01:17,332 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 20:01:17,332 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 20:01:17,332 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 20:01:17,332 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 20:01:17,332 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 20:01:17,332 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 20:01:17,332 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 20:01:17,332 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 20:01:17,333 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 20:01:17,333 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 20:01:17,333 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 20:01:17,550 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 20:01:17,567 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 20:01:17,569 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 20:01:17,570 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 20:01:17,573 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 20:01:17,574 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem15_label38.c [2023-04-02 20:01:18,752 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 20:01:19,052 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 20:01:19,053 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem15_label38.c [2023-04-02 20:01:19,070 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bacce116e/a982130b83274d52a057fb2b7a4c8dcf/FLAG628092f0e [2023-04-02 20:01:19,085 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bacce116e/a982130b83274d52a057fb2b7a4c8dcf [2023-04-02 20:01:19,087 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 20:01:19,089 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 20:01:19,091 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 20:01:19,091 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 20:01:19,094 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 20:01:19,095 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 08:01:19" (1/1) ... [2023-04-02 20:01:19,096 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21c6fa89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:01:19, skipping insertion in model container [2023-04-02 20:01:19,096 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 08:01:19" (1/1) ... [2023-04-02 20:01:19,101 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 20:01:19,164 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 20:01:19,334 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_label38.c[3800,3813] [2023-04-02 20:01:19,722 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 20:01:19,732 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 20:01:19,757 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_label38.c[3800,3813] [2023-04-02 20:01:19,923 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 20:01:19,938 INFO L208 MainTranslator]: Completed translation [2023-04-02 20:01:19,939 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:01:19 WrapperNode [2023-04-02 20:01:19,939 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 20:01:19,940 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 20:01:19,940 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 20:01:19,940 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 20:01:19,950 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:01:19" (1/1) ... [2023-04-02 20:01:19,950 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:01:19" (1/1) ... [2023-04-02 20:01:19,993 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:01:19" (1/1) ... [2023-04-02 20:01:19,993 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:01:19" (1/1) ... [2023-04-02 20:01:20,041 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:01:19" (1/1) ... [2023-04-02 20:01:20,056 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:01:19" (1/1) ... [2023-04-02 20:01:20,087 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:01:19" (1/1) ... [2023-04-02 20:01:20,094 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:01:19" (1/1) ... [2023-04-02 20:01:20,114 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 20:01:20,115 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 20:01:20,115 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 20:01:20,116 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 20:01:20,117 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:01:19" (1/1) ... [2023-04-02 20:01:20,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 20:01:20,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 20:01:20,178 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 20:01:20,192 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 20:01:20,218 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 20:01:20,218 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 20:01:20,218 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 20:01:20,218 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-02 20:01:20,218 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-02 20:01:20,218 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 20:01:20,219 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-02 20:01:20,219 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-02 20:01:20,219 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 20:01:20,219 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 20:01:20,219 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 20:01:20,219 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 20:01:20,219 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-02 20:01:20,219 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-02 20:01:20,219 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 20:01:20,220 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 20:01:20,220 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 20:01:20,220 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 20:01:20,220 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 20:01:20,220 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 20:01:20,220 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 20:01:20,303 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 20:01:20,305 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 20:01:22,594 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 20:01:23,326 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 20:01:23,327 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-02 20:01:23,331 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 08:01:23 BoogieIcfgContainer [2023-04-02 20:01:23,331 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 20:01:23,334 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 20:01:23,334 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 20:01:23,336 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 20:01:23,336 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 08:01:19" (1/3) ... [2023-04-02 20:01:23,337 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51d22232 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 08:01:23, skipping insertion in model container [2023-04-02 20:01:23,337 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:01:19" (2/3) ... [2023-04-02 20:01:23,337 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51d22232 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 08:01:23, skipping insertion in model container [2023-04-02 20:01:23,337 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 08:01:23" (3/3) ... [2023-04-02 20:01:23,338 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem15_label38.c [2023-04-02 20:01:23,354 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 20:01:23,354 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 20:01:23,413 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 20:01:23,419 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;@b37d0cd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 20:01:23,420 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 20:01:23,426 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 20:01:23,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-02 20:01:23,431 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 20:01:23,432 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 20:01:23,433 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 20:01:23,437 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 20:01:23,438 INFO L85 PathProgramCache]: Analyzing trace with hash 468029348, now seen corresponding path program 1 times [2023-04-02 20:01:23,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 20:01:23,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078025684] [2023-04-02 20:01:23,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 20:01:23,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 20:01:23,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 20:01:23,782 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 20:01:23,783 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 20:01:23,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078025684] [2023-04-02 20:01:23,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078025684] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 20:01:23,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 20:01:23,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 20:01:23,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199713418] [2023-04-02 20:01:23,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 20:01:23,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 20:01:23,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 20:01:23,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 20:01:23,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 20:01:23,833 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 20:01:25,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 20:01:25,446 INFO L93 Difference]: Finished difference Result 720 states and 1390 transitions. [2023-04-02 20:01:25,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 20:01:25,451 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 20:01:25,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 20:01:25,463 INFO L225 Difference]: With dead ends: 720 [2023-04-02 20:01:25,464 INFO L226 Difference]: Without dead ends: 473 [2023-04-02 20:01:25,469 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 20:01:25,472 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 248 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 267 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 267 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-04-02 20:01:25,473 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [248 Valid, 177 Invalid, 929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [267 Valid, 662 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-04-02 20:01:25,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2023-04-02 20:01:25,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 473. [2023-04-02 20:01:25,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 461 states have (on average 1.596529284164859) internal successors, (736), 461 states have internal predecessors, (736), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2023-04-02 20:01:25,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 749 transitions. [2023-04-02 20:01:25,533 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 749 transitions. Word has length 11 [2023-04-02 20:01:25,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 20:01:25,533 INFO L495 AbstractCegarLoop]: Abstraction has 473 states and 749 transitions. [2023-04-02 20:01:25,534 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 20:01:25,534 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 749 transitions. [2023-04-02 20:01:25,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-04-02 20:01:25,535 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 20:01:25,535 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 20:01:25,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 20:01:25,536 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 20:01:25,536 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 20:01:25,536 INFO L85 PathProgramCache]: Analyzing trace with hash 30062859, now seen corresponding path program 1 times [2023-04-02 20:01:25,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 20:01:25,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892368324] [2023-04-02 20:01:25,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 20:01:25,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 20:01:25,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 20:01:25,770 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 20:01:25,770 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 20:01:25,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892368324] [2023-04-02 20:01:25,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892368324] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 20:01:25,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 20:01:25,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 20:01:25,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422551508] [2023-04-02 20:01:25,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 20:01:25,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 20:01:25,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 20:01:25,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 20:01:25,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 20:01:25,774 INFO L87 Difference]: Start difference. First operand 473 states and 749 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 20:01:28,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 20:01:28,378 INFO L93 Difference]: Finished difference Result 1426 states and 2281 transitions. [2023-04-02 20:01:28,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-02 20:01:28,379 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 20:01:28,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 20:01:28,384 INFO L225 Difference]: With dead ends: 1426 [2023-04-02 20:01:28,384 INFO L226 Difference]: Without dead ends: 958 [2023-04-02 20:01:28,386 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 20:01:28,387 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 670 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 1783 mSolverCounterSat, 229 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 670 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 2012 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 229 IncrementalHoareTripleChecker+Valid, 1783 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-04-02 20:01:28,388 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [670 Valid, 55 Invalid, 2012 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [229 Valid, 1783 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-04-02 20:01:28,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 958 states. [2023-04-02 20:01:28,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 958 to 940. [2023-04-02 20:01:28,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 940 states, 916 states have (on average 1.490174672489083) internal successors, (1365), 924 states have internal predecessors, (1365), 8 states have call successors, (8), 8 states have call predecessors, (8), 15 states have return successors, (32), 7 states have call predecessors, (32), 7 states have call successors, (32) [2023-04-02 20:01:28,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 940 states to 940 states and 1405 transitions. [2023-04-02 20:01:28,436 INFO L78 Accepts]: Start accepts. Automaton has 940 states and 1405 transitions. Word has length 31 [2023-04-02 20:01:28,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 20:01:28,436 INFO L495 AbstractCegarLoop]: Abstraction has 940 states and 1405 transitions. [2023-04-02 20:01:28,436 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 20:01:28,436 INFO L276 IsEmpty]: Start isEmpty. Operand 940 states and 1405 transitions. [2023-04-02 20:01:28,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-04-02 20:01:28,437 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 20:01:28,438 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] [2023-04-02 20:01:28,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-02 20:01:28,438 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 20:01:28,438 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 20:01:28,438 INFO L85 PathProgramCache]: Analyzing trace with hash -1450305661, now seen corresponding path program 1 times [2023-04-02 20:01:28,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 20:01:28,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990464494] [2023-04-02 20:01:28,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 20:01:28,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 20:01:28,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 20:01:28,663 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 20:01:28,663 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 20:01:28,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990464494] [2023-04-02 20:01:28,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990464494] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 20:01:28,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 20:01:28,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 20:01:28,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821981826] [2023-04-02 20:01:28,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 20:01:28,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 20:01:28,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 20:01:28,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 20:01:28,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 20:01:28,669 INFO L87 Difference]: Start difference. First operand 940 states and 1405 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 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 20:01:30,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 20:01:30,801 INFO L93 Difference]: Finished difference Result 2858 states and 4365 transitions. [2023-04-02 20:01:30,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-02 20:01:30,803 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 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 35 [2023-04-02 20:01:30,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 20:01:30,815 INFO L225 Difference]: With dead ends: 2858 [2023-04-02 20:01:30,815 INFO L226 Difference]: Without dead ends: 1923 [2023-04-02 20:01:30,822 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 20:01:30,824 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 820 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 1205 mSolverCounterSat, 469 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 820 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, 2.0s IncrementalHoareTripleChecker+Time [2023-04-02 20:01:30,826 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [820 Valid, 47 Invalid, 1674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [469 Valid, 1205 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-04-02 20:01:30,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1923 states. [2023-04-02 20:01:30,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1923 to 1666. [2023-04-02 20:01:30,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1666 states, 1616 states have (on average 1.3409653465346534) internal successors, (2167), 1640 states have internal predecessors, (2167), 13 states have call successors, (13), 13 states have call predecessors, (13), 36 states have return successors, (82), 12 states have call predecessors, (82), 12 states have call successors, (82) [2023-04-02 20:01:30,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1666 states to 1666 states and 2262 transitions. [2023-04-02 20:01:30,897 INFO L78 Accepts]: Start accepts. Automaton has 1666 states and 2262 transitions. Word has length 35 [2023-04-02 20:01:30,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 20:01:30,898 INFO L495 AbstractCegarLoop]: Abstraction has 1666 states and 2262 transitions. [2023-04-02 20:01:30,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 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 20:01:30,898 INFO L276 IsEmpty]: Start isEmpty. Operand 1666 states and 2262 transitions. [2023-04-02 20:01:30,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2023-04-02 20:01:30,911 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 20:01:30,912 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:01:30,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-02 20:01:30,913 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 20:01:30,913 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 20:01:30,913 INFO L85 PathProgramCache]: Analyzing trace with hash 1985579922, now seen corresponding path program 1 times [2023-04-02 20:01:30,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 20:01:30,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359240949] [2023-04-02 20:01:30,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 20:01:30,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 20:01:30,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 20:01:31,269 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 20:01:31,269 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 20:01:31,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359240949] [2023-04-02 20:01:31,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359240949] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 20:01:31,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 20:01:31,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 20:01:31,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314856945] [2023-04-02 20:01:31,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 20:01:31,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 20:01:31,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 20:01:31,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 20:01:31,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 20:01:31,272 INFO L87 Difference]: Start difference. First operand 1666 states and 2262 transitions. Second operand has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 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 20:01:32,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 20:01:32,709 INFO L93 Difference]: Finished difference Result 4256 states and 5993 transitions. [2023-04-02 20:01:32,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 20:01:32,710 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 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 152 [2023-04-02 20:01:32,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 20:01:32,721 INFO L225 Difference]: With dead ends: 4256 [2023-04-02 20:01:32,722 INFO L226 Difference]: Without dead ends: 2595 [2023-04-02 20:01:32,726 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 20:01:32,734 INFO L413 NwaCegarLoop]: 400 mSDtfsCounter, 225 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 706 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 416 SdHoareTripleChecker+Invalid, 917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 706 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-04-02 20:01:32,735 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [225 Valid, 416 Invalid, 917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 706 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-04-02 20:01:32,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2595 states. [2023-04-02 20:01:32,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2595 to 2513. [2023-04-02 20:01:32,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2513 states, 2451 states have (on average 1.266829865361077) internal successors, (3105), 2479 states have internal predecessors, (3105), 17 states have call successors, (17), 17 states have call predecessors, (17), 44 states have return successors, (142), 16 states have call predecessors, (142), 16 states have call successors, (142) [2023-04-02 20:01:32,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2513 states to 2513 states and 3264 transitions. [2023-04-02 20:01:32,810 INFO L78 Accepts]: Start accepts. Automaton has 2513 states and 3264 transitions. Word has length 152 [2023-04-02 20:01:32,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 20:01:32,813 INFO L495 AbstractCegarLoop]: Abstraction has 2513 states and 3264 transitions. [2023-04-02 20:01:32,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 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 20:01:32,813 INFO L276 IsEmpty]: Start isEmpty. Operand 2513 states and 3264 transitions. [2023-04-02 20:01:32,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2023-04-02 20:01:32,821 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 20:01:32,821 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:01:32,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-02 20:01:32,822 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 20:01:32,822 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 20:01:32,822 INFO L85 PathProgramCache]: Analyzing trace with hash 124691796, now seen corresponding path program 1 times [2023-04-02 20:01:32,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 20:01:32,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012501436] [2023-04-02 20:01:32,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 20:01:32,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 20:01:32,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 20:01:33,300 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 74 proven. 2 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-04-02 20:01:33,300 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 20:01:33,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012501436] [2023-04-02 20:01:33,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012501436] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 20:01:33,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455221262] [2023-04-02 20:01:33,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 20:01:33,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 20:01:33,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 20:01:33,304 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 20:01:33,306 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 20:01:33,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 20:01:33,553 INFO L262 TraceCheckSpWp]: Trace formula consists of 769 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-02 20:01:33,566 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 20:01:33,720 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 74 proven. 2 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-04-02 20:01:33,720 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 20:01:33,868 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 74 proven. 2 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-04-02 20:01:33,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455221262] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 20:01:33,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [942261676] [2023-04-02 20:01:33,894 INFO L159 IcfgInterpreter]: Started Sifa with 148 locations of interest [2023-04-02 20:01:33,895 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 20:01:33,901 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 20:01:33,906 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 20:01:33,912 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 20:01:34,046 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 51 for LOIs [2023-04-02 20:01:34,370 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 24 [2023-04-02 20:01:34,817 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 28500 conjuctions. This might take some time... [2023-04-02 20:01:37,017 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 805 conjuctions. [2023-04-02 20:01:46,231 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 37