/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/Problem02_label03.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 03:14:35,327 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 03:14:35,328 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 03:14:35,359 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 03:14:35,359 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 03:14:35,360 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 03:14:35,367 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 03:14:35,369 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 03:14:35,370 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 03:14:35,375 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 03:14:35,376 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 03:14:35,378 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 03:14:35,378 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 03:14:35,382 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 03:14:35,383 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 03:14:35,383 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 03:14:35,384 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 03:14:35,384 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 03:14:35,385 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 03:14:35,386 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 03:14:35,387 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 03:14:35,388 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 03:14:35,389 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 03:14:35,390 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 03:14:35,397 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 03:14:35,397 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 03:14:35,397 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 03:14:35,398 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 03:14:35,399 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 03:14:35,399 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 03:14:35,399 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 03:14:35,400 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 03:14:35,401 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 03:14:35,401 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 03:14:35,402 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 03:14:35,402 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 03:14:35,402 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 03:14:35,402 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 03:14:35,403 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 03:14:35,403 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 03:14:35,403 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 03:14:35,405 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 [2023-04-01 03:14:35,432 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 03:14:35,433 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 03:14:35,433 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 03:14:35,433 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 03:14:35,434 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 03:14:35,434 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 03:14:35,434 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 03:14:35,434 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 03:14:35,434 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 03:14:35,434 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 03:14:35,435 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 03:14:35,435 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 03:14:35,435 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 03:14:35,435 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 03:14:35,435 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 03:14:35,435 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 03:14:35,436 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 03:14:35,436 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 03:14:35,436 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 03:14:35,436 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 03:14:35,436 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 03:14:35,436 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 03:14:35,436 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 03:14:35,436 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 03:14:35,437 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 03:14:35,437 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 03:14:35,437 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 03:14:35,437 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 03:14:35,437 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 03:14:35,437 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 03:14:35,437 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 03:14:35,437 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 03:14:35,437 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 03:14:35,438 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 03:14:35,438 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 03:14:35,438 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 03:14:35,438 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 03:14:35,438 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 03:14:35,438 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 03:14:35,438 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 03:14:35,438 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 03:14:35,438 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 03:14:35,644 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 03:14:35,669 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 03:14:35,671 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 03:14:35,672 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 03:14:35,673 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 03:14:35,674 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem02_label03.c [2023-04-01 03:14:36,970 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 03:14:37,270 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 03:14:37,271 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem02_label03.c [2023-04-01 03:14:37,298 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d82bbcd2d/c231c5208be549f0b10b00bf4720be90/FLAGb87cf6640 [2023-04-01 03:14:37,551 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d82bbcd2d/c231c5208be549f0b10b00bf4720be90 [2023-04-01 03:14:37,555 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 03:14:37,556 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 03:14:37,557 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 03:14:37,557 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 03:14:37,559 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 03:14:37,560 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 03:14:37" (1/1) ... [2023-04-01 03:14:37,561 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b40dfa7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:14:37, skipping insertion in model container [2023-04-01 03:14:37,561 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 03:14:37" (1/1) ... [2023-04-01 03:14:37,566 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 03:14:37,609 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 03:14:37,859 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/Problem02_label03.c[20079,20092] [2023-04-01 03:14:37,910 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 03:14:37,918 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 03:14:37,976 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/Problem02_label03.c[20079,20092] [2023-04-01 03:14:37,982 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 03:14:37,994 INFO L208 MainTranslator]: Completed translation [2023-04-01 03:14:37,994 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:14:37 WrapperNode [2023-04-01 03:14:37,994 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 03:14:37,995 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 03:14:37,995 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 03:14:37,995 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 03:14:38,009 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:14:37" (1/1) ... [2023-04-01 03:14:38,009 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:14:37" (1/1) ... [2023-04-01 03:14:38,026 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:14:37" (1/1) ... [2023-04-01 03:14:38,027 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:14:37" (1/1) ... [2023-04-01 03:14:38,046 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:14:37" (1/1) ... [2023-04-01 03:14:38,053 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:14:37" (1/1) ... [2023-04-01 03:14:38,056 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:14:37" (1/1) ... [2023-04-01 03:14:38,059 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:14:37" (1/1) ... [2023-04-01 03:14:38,062 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 03:14:38,063 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 03:14:38,063 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 03:14:38,063 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 03:14:38,064 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:14:37" (1/1) ... [2023-04-01 03:14:38,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 03:14:38,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:14:38,122 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) [2023-04-01 03:14:38,124 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 [2023-04-01 03:14:38,170 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 03:14:38,170 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 03:14:38,170 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 03:14:38,178 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 03:14:38,178 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 03:14:38,178 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 03:14:38,178 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 03:14:38,178 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 03:14:38,178 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 03:14:38,178 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 03:14:38,179 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 03:14:38,179 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 03:14:38,179 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 03:14:38,179 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 03:14:38,179 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 03:14:38,179 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 03:14:38,179 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 03:14:38,179 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 03:14:38,179 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 03:14:38,269 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 03:14:38,271 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 03:14:39,269 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 03:14:39,427 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 03:14:39,427 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 03:14:39,430 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 03:14:39 BoogieIcfgContainer [2023-04-01 03:14:39,430 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 03:14:39,431 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 03:14:39,431 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 03:14:39,434 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 03:14:39,434 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 03:14:37" (1/3) ... [2023-04-01 03:14:39,434 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6aa069cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 03:14:39, skipping insertion in model container [2023-04-01 03:14:39,434 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:14:37" (2/3) ... [2023-04-01 03:14:39,434 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6aa069cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 03:14:39, skipping insertion in model container [2023-04-01 03:14:39,435 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 03:14:39" (3/3) ... [2023-04-01 03:14:39,435 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem02_label03.c [2023-04-01 03:14:39,448 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 03:14:39,448 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 03:14:39,481 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 03:14:39,486 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;@4c954245, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 03:14:39,486 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 03:14:39,489 INFO L276 IsEmpty]: Start isEmpty. Operand has 95 states, 87 states have (on average 1.9080459770114941) internal successors, (166), 88 states have internal predecessors, (166), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 03:14:39,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-04-01 03:14:39,496 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:14:39,496 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:14:39,497 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:14:39,500 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:14:39,500 INFO L85 PathProgramCache]: Analyzing trace with hash -2027404584, now seen corresponding path program 1 times [2023-04-01 03:14:39,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:14:39,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637077895] [2023-04-01 03:14:39,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:14:39,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:14:39,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:14:40,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:14:40,021 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:14:40,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637077895] [2023-04-01 03:14:40,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637077895] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 03:14:40,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 03:14:40,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 03:14:40,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884336057] [2023-04-01 03:14:40,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 03:14:40,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 03:14:40,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:14:40,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 03:14:40,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 03:14:40,048 INFO L87 Difference]: Start difference. First operand has 95 states, 87 states have (on average 1.9080459770114941) internal successors, (166), 88 states have internal predecessors, (166), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 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) [2023-04-01 03:14:40,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:14:40,396 INFO L93 Difference]: Finished difference Result 273 states and 508 transitions. [2023-04-01 03:14:40,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 03:14:40,398 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 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 86 [2023-04-01 03:14:40,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:14:40,406 INFO L225 Difference]: With dead ends: 273 [2023-04-01 03:14:40,406 INFO L226 Difference]: Without dead ends: 175 [2023-04-01 03:14:40,408 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 [2023-04-01 03:14:40,411 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 25 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 03:14:40,411 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 76 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 03:14:40,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2023-04-01 03:14:40,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2023-04-01 03:14:40,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 167 states have (on average 1.81437125748503) internal successors, (303), 167 states have internal predecessors, (303), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-04-01 03:14:40,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 312 transitions. [2023-04-01 03:14:40,459 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 312 transitions. Word has length 86 [2023-04-01 03:14:40,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:14:40,460 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 312 transitions. [2023-04-01 03:14:40,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 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) [2023-04-01 03:14:40,460 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 312 transitions. [2023-04-01 03:14:40,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-04-01 03:14:40,464 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:14:40,464 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] [2023-04-01 03:14:40,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 03:14:40,464 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:14:40,465 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:14:40,465 INFO L85 PathProgramCache]: Analyzing trace with hash -78194012, now seen corresponding path program 1 times [2023-04-01 03:14:40,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:14:40,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434524104] [2023-04-01 03:14:40,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:14:40,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:14:40,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:14:41,173 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:14:41,174 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:14:41,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434524104] [2023-04-01 03:14:41,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434524104] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 03:14:41,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 03:14:41,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 03:14:41,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909129085] [2023-04-01 03:14:41,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 03:14:41,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 03:14:41,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:14:41,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 03:14:41,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 03:14:41,179 INFO L87 Difference]: Start difference. First operand 175 states and 312 transitions. Second operand has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 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) [2023-04-01 03:14:41,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:14:41,656 INFO L93 Difference]: Finished difference Result 535 states and 970 transitions. [2023-04-01 03:14:41,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 03:14:41,657 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 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 94 [2023-04-01 03:14:41,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:14:41,668 INFO L225 Difference]: With dead ends: 535 [2023-04-01 03:14:41,668 INFO L226 Difference]: Without dead ends: 365 [2023-04-01 03:14:41,674 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 [2023-04-01 03:14:41,677 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 268 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 03:14:41,678 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [268 Valid, 47 Invalid, 594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 491 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 03:14:41,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2023-04-01 03:14:41,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 359. [2023-04-01 03:14:41,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 339 states have (on average 1.640117994100295) internal successors, (556), 347 states have internal predecessors, (556), 6 states have call successors, (6), 6 states have call predecessors, (6), 13 states have return successors, (29), 5 states have call predecessors, (29), 5 states have call successors, (29) [2023-04-01 03:14:41,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 591 transitions. [2023-04-01 03:14:41,739 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 591 transitions. Word has length 94 [2023-04-01 03:14:41,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:14:41,743 INFO L495 AbstractCegarLoop]: Abstraction has 359 states and 591 transitions. [2023-04-01 03:14:41,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 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) [2023-04-01 03:14:41,743 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 591 transitions. [2023-04-01 03:14:41,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2023-04-01 03:14:41,746 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:14:41,747 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-01 03:14:41,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 03:14:41,747 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:14:41,747 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:14:41,747 INFO L85 PathProgramCache]: Analyzing trace with hash -1643545994, now seen corresponding path program 1 times [2023-04-01 03:14:41,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:14:41,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48655134] [2023-04-01 03:14:41,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:14:41,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:14:41,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:14:41,965 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:14:41,965 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:14:41,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48655134] [2023-04-01 03:14:41,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48655134] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 03:14:41,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 03:14:41,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 03:14:41,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260909264] [2023-04-01 03:14:41,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 03:14:41,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 03:14:41,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:14:41,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 03:14:41,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 03:14:41,969 INFO L87 Difference]: Start difference. First operand 359 states and 591 transitions. Second operand has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 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) [2023-04-01 03:14:42,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:14:42,385 INFO L93 Difference]: Finished difference Result 1107 states and 1947 transitions. [2023-04-01 03:14:42,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 03:14:42,386 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 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 97 [2023-04-01 03:14:42,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:14:42,393 INFO L225 Difference]: With dead ends: 1107 [2023-04-01 03:14:42,393 INFO L226 Difference]: Without dead ends: 753 [2023-04-01 03:14:42,397 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 [2023-04-01 03:14:42,401 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 288 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 03:14:42,402 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [288 Valid, 44 Invalid, 588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 453 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 03:14:42,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 753 states. [2023-04-01 03:14:42,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 753 to 725. [2023-04-01 03:14:42,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 725 states, 682 states have (on average 1.5601173020527859) internal successors, (1064), 705 states have internal predecessors, (1064), 10 states have call successors, (10), 10 states have call predecessors, (10), 32 states have return successors, (109), 9 states have call predecessors, (109), 9 states have call successors, (109) [2023-04-01 03:14:42,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 725 states to 725 states and 1183 transitions. [2023-04-01 03:14:42,456 INFO L78 Accepts]: Start accepts. Automaton has 725 states and 1183 transitions. Word has length 97 [2023-04-01 03:14:42,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:14:42,458 INFO L495 AbstractCegarLoop]: Abstraction has 725 states and 1183 transitions. [2023-04-01 03:14:42,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 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) [2023-04-01 03:14:42,458 INFO L276 IsEmpty]: Start isEmpty. Operand 725 states and 1183 transitions. [2023-04-01 03:14:42,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2023-04-01 03:14:42,469 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:14:42,470 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2023-04-01 03:14:42,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 03:14:42,470 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:14:42,470 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:14:42,470 INFO L85 PathProgramCache]: Analyzing trace with hash 1893838328, now seen corresponding path program 1 times [2023-04-01 03:14:42,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:14:42,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858848409] [2023-04-01 03:14:42,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:14:42,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:14:42,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:14:42,619 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 03:14:42,619 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:14:42,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858848409] [2023-04-01 03:14:42,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858848409] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 03:14:42,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44994836] [2023-04-01 03:14:42,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:14:42,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:14:42,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:14:42,623 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) [2023-04-01 03:14:42,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 03:14:42,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:14:42,751 INFO L262 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 03:14:42,757 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:14:42,843 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 03:14:42,843 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 03:14:42,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44994836] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 03:14:42,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 03:14:42,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-04-01 03:14:42,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524087635] [2023-04-01 03:14:42,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 03:14:42,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 03:14:42,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:14:42,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 03:14:42,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-01 03:14:42,846 INFO L87 Difference]: Start difference. First operand 725 states and 1183 transitions. Second operand has 5 states, 5 states have (on average 18.8) internal successors, (94), 4 states have internal predecessors, (94), 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) [2023-04-01 03:14:43,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:14:43,274 INFO L93 Difference]: Finished difference Result 1833 states and 3080 transitions. [2023-04-01 03:14:43,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 03:14:43,275 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 4 states have internal predecessors, (94), 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 106 [2023-04-01 03:14:43,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:14:43,282 INFO L225 Difference]: With dead ends: 1833 [2023-04-01 03:14:43,282 INFO L226 Difference]: Without dead ends: 1113 [2023-04-01 03:14:43,284 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-04-01 03:14:43,286 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 256 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 442 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 03:14:43,286 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [256 Valid, 40 Invalid, 556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 442 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 03:14:43,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1113 states. [2023-04-01 03:14:43,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1113 to 1091. [2023-04-01 03:14:43,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1091 states, 1025 states have (on average 1.431219512195122) internal successors, (1467), 1063 states have internal predecessors, (1467), 14 states have call successors, (14), 14 states have call predecessors, (14), 51 states have return successors, (202), 13 states have call predecessors, (202), 13 states have call successors, (202) [2023-04-01 03:14:43,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1091 states to 1091 states and 1683 transitions. [2023-04-01 03:14:43,320 INFO L78 Accepts]: Start accepts. Automaton has 1091 states and 1683 transitions. Word has length 106 [2023-04-01 03:14:43,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:14:43,321 INFO L495 AbstractCegarLoop]: Abstraction has 1091 states and 1683 transitions. [2023-04-01 03:14:43,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 4 states have internal predecessors, (94), 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) [2023-04-01 03:14:43,321 INFO L276 IsEmpty]: Start isEmpty. Operand 1091 states and 1683 transitions. [2023-04-01 03:14:43,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2023-04-01 03:14:43,324 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:14:43,324 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:14:43,339 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 03:14:43,532 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 [2023-04-01 03:14:43,532 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:14:43,533 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:14:43,533 INFO L85 PathProgramCache]: Analyzing trace with hash -1602339578, now seen corresponding path program 1 times [2023-04-01 03:14:43,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:14:43,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934698106] [2023-04-01 03:14:43,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:14:43,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:14:43,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:14:43,725 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:14:43,726 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:14:43,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934698106] [2023-04-01 03:14:43,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934698106] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 03:14:43,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475059380] [2023-04-01 03:14:43,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:14:43,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:14:43,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:14:43,732 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) [2023-04-01 03:14:43,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 03:14:43,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:14:43,831 INFO L262 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 03:14:43,841 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:14:43,992 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 03:14:43,992 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 03:14:43,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475059380] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 03:14:43,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 03:14:43,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-04-01 03:14:43,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986598882] [2023-04-01 03:14:43,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 03:14:43,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 03:14:43,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:14:43,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 03:14:43,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-01 03:14:43,996 INFO L87 Difference]: Start difference. First operand 1091 states and 1683 transitions. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 03:14:44,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:14:44,301 INFO L93 Difference]: Finished difference Result 1531 states and 2474 transitions. [2023-04-01 03:14:44,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 03:14:44,302 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 107 [2023-04-01 03:14:44,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:14:44,313 INFO L225 Difference]: With dead ends: 1531 [2023-04-01 03:14:44,313 INFO L226 Difference]: Without dead ends: 1529 [2023-04-01 03:14:44,314 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-01 03:14:44,314 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 57 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 03:14:44,314 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 22 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 03:14:44,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1529 states. [2023-04-01 03:14:44,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1529 to 1181. [2023-04-01 03:14:44,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1181 states, 1110 states have (on average 1.4333333333333333) internal successors, (1591), 1151 states have internal predecessors, (1591), 15 states have call successors, (15), 15 states have call predecessors, (15), 55 states have return successors, (233), 14 states have call predecessors, (233), 14 states have call successors, (233) [2023-04-01 03:14:44,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1181 states to 1181 states and 1839 transitions. [2023-04-01 03:14:44,411 INFO L78 Accepts]: Start accepts. Automaton has 1181 states and 1839 transitions. Word has length 107 [2023-04-01 03:14:44,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:14:44,412 INFO L495 AbstractCegarLoop]: Abstraction has 1181 states and 1839 transitions. [2023-04-01 03:14:44,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 03:14:44,412 INFO L276 IsEmpty]: Start isEmpty. Operand 1181 states and 1839 transitions. [2023-04-01 03:14:44,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2023-04-01 03:14:44,415 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:14:44,415 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:14:44,423 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 03:14:44,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:14:44,623 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:14:44,624 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:14:44,624 INFO L85 PathProgramCache]: Analyzing trace with hash -1555866555, now seen corresponding path program 1 times [2023-04-01 03:14:44,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:14:44,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082289940] [2023-04-01 03:14:44,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:14:44,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:14:44,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:14:44,841 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 52 proven. 8 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-04-01 03:14:44,842 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:14:44,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082289940] [2023-04-01 03:14:44,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082289940] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 03:14:44,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821381272] [2023-04-01 03:14:44,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:14:44,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:14:44,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:14:44,843 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 03:14:44,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 03:14:44,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:14:44,975 INFO L262 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-01 03:14:44,984 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:14:45,039 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 64 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 03:14:45,039 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 03:14:45,155 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 64 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 03:14:45,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821381272] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 03:14:45,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [657513130] [2023-04-01 03:14:45,183 INFO L159 IcfgInterpreter]: Started Sifa with 90 locations of interest [2023-04-01 03:14:45,183 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 03:14:45,186 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 03:14:45,190 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 03:14:45,190 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 03:14:45,471 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 65 for LOIs [2023-04-01 03:14:51,058 WARN L223 SmtUtils]: Spent 5.05s on a formula simplification. DAG size of input: 488 DAG size of output: 489 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm)