/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/Problem16_label08.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 04:16:58,166 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 04:16:58,169 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 04:16:58,205 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 04:16:58,206 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 04:16:58,208 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 04:16:58,211 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 04:16:58,214 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 04:16:58,215 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 04:16:58,220 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 04:16:58,222 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 04:16:58,223 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 04:16:58,224 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 04:16:58,227 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 04:16:58,229 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 04:16:58,230 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 04:16:58,230 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 04:16:58,231 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 04:16:58,234 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 04:16:58,239 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 04:16:58,240 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 04:16:58,241 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 04:16:58,241 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 04:16:58,242 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 04:16:58,250 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 04:16:58,250 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 04:16:58,251 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 04:16:58,252 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 04:16:58,253 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 04:16:58,254 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 04:16:58,254 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 04:16:58,254 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 04:16:58,256 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 04:16:58,256 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 04:16:58,257 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 04:16:58,257 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 04:16:58,257 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 04:16:58,258 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 04:16:58,258 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 04:16:58,258 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 04:16:58,259 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 04:16:58,260 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 04:16:58,285 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 04:16:58,285 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 04:16:58,286 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 04:16:58,286 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 04:16:58,286 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 04:16:58,287 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 04:16:58,287 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 04:16:58,287 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 04:16:58,287 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 04:16:58,287 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 04:16:58,287 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 04:16:58,287 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 04:16:58,287 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 04:16:58,288 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 04:16:58,288 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 04:16:58,288 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 04:16:58,288 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 04:16:58,288 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 04:16:58,289 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 04:16:58,289 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 04:16:58,289 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 04:16:58,289 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 04:16:58,289 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 04:16:58,289 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 04:16:58,289 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 04:16:58,290 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 04:16:58,290 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 04:16:58,290 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 04:16:58,290 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 04:16:58,290 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 04:16:58,290 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 04:16:58,290 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 04:16:58,291 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:16:58,291 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 04:16:58,291 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 04:16:58,291 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 04:16:58,291 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 04:16:58,291 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 04:16:58,291 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 04:16:58,291 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 04:16:58,292 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 04:16:58,292 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 04:16:58,538 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 04:16:58,558 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 04:16:58,560 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 04:16:58,561 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 04:16:58,562 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 04:16:58,564 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem16_label08.c [2023-04-01 04:16:59,761 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 04:17:00,122 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 04:17:00,123 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem16_label08.c [2023-04-01 04:17:00,142 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2cb531f25/a7d239aad9c74c1ebe1c914097123acc/FLAG06d1294bd [2023-04-01 04:17:00,349 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2cb531f25/a7d239aad9c74c1ebe1c914097123acc [2023-04-01 04:17:00,351 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 04:17:00,353 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 04:17:00,354 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 04:17:00,354 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 04:17:00,363 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 04:17:00,364 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:17:00" (1/1) ... [2023-04-01 04:17:00,366 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45c919f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:17:00, skipping insertion in model container [2023-04-01 04:17:00,366 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:17:00" (1/1) ... [2023-04-01 04:17:00,372 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 04:17:00,444 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 04:17:00,627 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/Problem16_label08.c[2006,2019] [2023-04-01 04:17:00,948 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:17:00,959 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 04:17:00,982 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/Problem16_label08.c[2006,2019] [2023-04-01 04:17:01,142 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:17:01,159 INFO L208 MainTranslator]: Completed translation [2023-04-01 04:17:01,159 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:17:01 WrapperNode [2023-04-01 04:17:01,160 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 04:17:01,161 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 04:17:01,161 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 04:17:01,161 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 04:17:01,172 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:17:01" (1/1) ... [2023-04-01 04:17:01,173 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:17:01" (1/1) ... [2023-04-01 04:17:01,205 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:17:01" (1/1) ... [2023-04-01 04:17:01,206 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:17:01" (1/1) ... [2023-04-01 04:17:01,263 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:17:01" (1/1) ... [2023-04-01 04:17:01,274 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:17:01" (1/1) ... [2023-04-01 04:17:01,303 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:17:01" (1/1) ... [2023-04-01 04:17:01,310 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:17:01" (1/1) ... [2023-04-01 04:17:01,328 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 04:17:01,329 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 04:17:01,329 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 04:17:01,330 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 04:17:01,331 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:17:01" (1/1) ... [2023-04-01 04:17:01,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:17:01,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:17:01,364 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 04:17:01,387 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 04:17:01,404 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 04:17:01,404 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 04:17:01,404 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 04:17:01,405 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 04:17:01,405 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 04:17:01,405 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 04:17:01,405 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 04:17:01,405 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 04:17:01,406 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 04:17:01,406 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 04:17:01,406 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 04:17:01,406 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 04:17:01,406 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 04:17:01,406 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 04:17:01,406 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 04:17:01,406 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 04:17:01,406 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 04:17:01,407 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 04:17:01,407 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 04:17:01,407 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 04:17:01,407 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 04:17:01,491 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 04:17:01,493 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 04:17:03,436 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 04:17:04,447 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 04:17:04,447 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 04:17:04,452 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:17:04 BoogieIcfgContainer [2023-04-01 04:17:04,453 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 04:17:04,456 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 04:17:04,456 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 04:17:04,459 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 04:17:04,459 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 04:17:00" (1/3) ... [2023-04-01 04:17:04,460 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ddfab90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:17:04, skipping insertion in model container [2023-04-01 04:17:04,460 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:17:01" (2/3) ... [2023-04-01 04:17:04,460 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ddfab90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:17:04, skipping insertion in model container [2023-04-01 04:17:04,460 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:17:04" (3/3) ... [2023-04-01 04:17:04,462 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem16_label08.c [2023-04-01 04:17:04,479 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 04:17:04,479 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 04:17:04,541 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 04:17:04,548 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;@76705537, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 04:17:04,549 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 04:17:04,556 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) [2023-04-01 04:17:04,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 04:17:04,563 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:17:04,564 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:17:04,564 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:17:04,570 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:17:04,571 INFO L85 PathProgramCache]: Analyzing trace with hash -510227129, now seen corresponding path program 1 times [2023-04-01 04:17:04,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:17:04,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379653102] [2023-04-01 04:17:04,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:17:04,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:17:04,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:17:04,864 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 04:17:04,865 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:17:04,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379653102] [2023-04-01 04:17:04,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379653102] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:17:04,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:17:04,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 04:17:04,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364909913] [2023-04-01 04:17:04,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:17:04,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:17:04,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:17:04,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:17:04,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:17:04,898 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) [2023-04-01 04:17:06,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:17:06,221 INFO L93 Difference]: Finished difference Result 718 states and 1389 transitions. [2023-04-01 04:17:06,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 04:17:06,228 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 [2023-04-01 04:17:06,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:17:06,240 INFO L225 Difference]: With dead ends: 718 [2023-04-01 04:17:06,240 INFO L226 Difference]: Without dead ends: 471 [2023-04-01 04:17:06,245 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 04:17:06,248 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 273 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 661 mSolverCounterSat, 374 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 1035 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 374 IncrementalHoareTripleChecker+Valid, 661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-04-01 04:17:06,249 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [273 Valid, 56 Invalid, 1035 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [374 Valid, 661 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-04-01 04:17:06,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2023-04-01 04:17:06,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 461. [2023-04-01 04:17:06,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 451 states have (on average 1.9113082039911309) internal successors, (862), 451 states have internal predecessors, (862), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-04-01 04:17:06,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 873 transitions. [2023-04-01 04:17:06,317 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 873 transitions. Word has length 11 [2023-04-01 04:17:06,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:17:06,317 INFO L495 AbstractCegarLoop]: Abstraction has 461 states and 873 transitions. [2023-04-01 04:17:06,317 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) [2023-04-01 04:17:06,318 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 873 transitions. [2023-04-01 04:17:06,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-04-01 04:17:06,319 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:17:06,319 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:17:06,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 04:17:06,320 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:17:06,320 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:17:06,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1273117908, now seen corresponding path program 1 times [2023-04-01 04:17:06,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:17:06,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58984280] [2023-04-01 04:17:06,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:17:06,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:17:06,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:17:06,530 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 04:17:06,530 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:17:06,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58984280] [2023-04-01 04:17:06,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58984280] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:17:06,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:17:06,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:17:06,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277383349] [2023-04-01 04:17:06,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:17:06,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:17:06,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:17:06,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:17:06,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:17:06,535 INFO L87 Difference]: Start difference. First operand 461 states and 873 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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 04:17:08,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:17:08,148 INFO L93 Difference]: Finished difference Result 1387 states and 2652 transitions. [2023-04-01 04:17:08,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 04:17:08,149 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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 23 [2023-04-01 04:17:08,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:17:08,157 INFO L225 Difference]: With dead ends: 1387 [2023-04-01 04:17:08,157 INFO L226 Difference]: Without dead ends: 931 [2023-04-01 04:17:08,158 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 04:17:08,160 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 994 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 1145 mSolverCounterSat, 439 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 994 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 1584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 439 IncrementalHoareTripleChecker+Valid, 1145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-04-01 04:17:08,160 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [994 Valid, 45 Invalid, 1584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [439 Valid, 1145 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-04-01 04:17:08,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 931 states. [2023-04-01 04:17:08,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 931 to 923. [2023-04-01 04:17:08,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 923 states, 903 states have (on average 1.663344407530454) internal successors, (1502), 907 states have internal predecessors, (1502), 8 states have call successors, (8), 8 states have call predecessors, (8), 11 states have return successors, (27), 7 states have call predecessors, (27), 7 states have call successors, (27) [2023-04-01 04:17:08,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 923 states to 923 states and 1537 transitions. [2023-04-01 04:17:08,229 INFO L78 Accepts]: Start accepts. Automaton has 923 states and 1537 transitions. Word has length 23 [2023-04-01 04:17:08,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:17:08,229 INFO L495 AbstractCegarLoop]: Abstraction has 923 states and 1537 transitions. [2023-04-01 04:17:08,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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 04:17:08,229 INFO L276 IsEmpty]: Start isEmpty. Operand 923 states and 1537 transitions. [2023-04-01 04:17:08,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-04-01 04:17:08,230 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:17:08,231 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] [2023-04-01 04:17:08,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 04:17:08,231 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:17:08,232 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:17:08,232 INFO L85 PathProgramCache]: Analyzing trace with hash -959921621, now seen corresponding path program 1 times [2023-04-01 04:17:08,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:17:08,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522496549] [2023-04-01 04:17:08,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:17:08,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:17:08,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:17:08,475 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 04:17:08,475 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:17:08,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522496549] [2023-04-01 04:17:08,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522496549] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:17:08,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809523990] [2023-04-01 04:17:08,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:17:08,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:17:08,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:17:08,480 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 04:17:08,498 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 04:17:08,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:17:08,571 INFO L262 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 04:17:08,576 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:17:08,664 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 04:17:08,664 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 04:17:08,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809523990] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:17:08,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 04:17:08,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-04-01 04:17:08,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274522055] [2023-04-01 04:17:08,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:17:08,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:17:08,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:17:08,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:17:08,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:17:08,666 INFO L87 Difference]: Start difference. First operand 923 states and 1537 transitions. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 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) [2023-04-01 04:17:09,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:17:09,614 INFO L93 Difference]: Finished difference Result 1381 states and 2201 transitions. [2023-04-01 04:17:09,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 04:17:09,615 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 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 52 [2023-04-01 04:17:09,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:17:09,622 INFO L225 Difference]: With dead ends: 1381 [2023-04-01 04:17:09,622 INFO L226 Difference]: Without dead ends: 1379 [2023-04-01 04:17:09,623 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:17:09,624 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 247 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 733 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 776 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 733 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-04-01 04:17:09,624 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 145 Invalid, 776 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 733 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-04-01 04:17:09,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1379 states. [2023-04-01 04:17:09,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1379 to 933. [2023-04-01 04:17:09,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 933 states, 910 states have (on average 1.6582417582417583) internal successors, (1509), 915 states have internal predecessors, (1509), 9 states have call successors, (9), 9 states have call predecessors, (9), 13 states have return successors, (36), 8 states have call predecessors, (36), 8 states have call successors, (36) [2023-04-01 04:17:09,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 933 states to 933 states and 1554 transitions. [2023-04-01 04:17:09,661 INFO L78 Accepts]: Start accepts. Automaton has 933 states and 1554 transitions. Word has length 52 [2023-04-01 04:17:09,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:17:09,661 INFO L495 AbstractCegarLoop]: Abstraction has 933 states and 1554 transitions. [2023-04-01 04:17:09,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 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) [2023-04-01 04:17:09,662 INFO L276 IsEmpty]: Start isEmpty. Operand 933 states and 1554 transitions. [2023-04-01 04:17:09,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-04-01 04:17:09,664 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:17:09,664 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] [2023-04-01 04:17:09,675 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-01 04:17:09,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:17:09,871 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:17:09,871 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:17:09,872 INFO L85 PathProgramCache]: Analyzing trace with hash 401749268, now seen corresponding path program 1 times [2023-04-01 04:17:09,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:17:09,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254986438] [2023-04-01 04:17:09,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:17:09,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:17:09,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:17:10,087 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 04:17:10,087 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:17:10,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254986438] [2023-04-01 04:17:10,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254986438] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:17:10,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:17:10,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:17:10,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566835924] [2023-04-01 04:17:10,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:17:10,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:17:10,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:17:10,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:17:10,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:17:10,093 INFO L87 Difference]: Start difference. First operand 933 states and 1554 transitions. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 4 states have internal predecessors, (61), 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 04:17:11,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:17:11,736 INFO L93 Difference]: Finished difference Result 2572 states and 4312 transitions. [2023-04-01 04:17:11,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 04:17:11,739 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 4 states have internal predecessors, (61), 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 67 [2023-04-01 04:17:11,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:17:11,753 INFO L225 Difference]: With dead ends: 2572 [2023-04-01 04:17:11,754 INFO L226 Difference]: Without dead ends: 1644 [2023-04-01 04:17:11,757 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 04:17:11,765 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 798 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 1247 mSolverCounterSat, 396 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 798 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 1643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 396 IncrementalHoareTripleChecker+Valid, 1247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-04-01 04:17:11,767 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [798 Valid, 48 Invalid, 1643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [396 Valid, 1247 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-04-01 04:17:11,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1644 states. [2023-04-01 04:17:11,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1644 to 1608. [2023-04-01 04:17:11,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1608 states, 1575 states have (on average 1.4984126984126984) internal successors, (2360), 1582 states have internal predecessors, (2360), 13 states have call successors, (13), 13 states have call predecessors, (13), 19 states have return successors, (82), 12 states have call predecessors, (82), 12 states have call successors, (82) [2023-04-01 04:17:11,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1608 states to 1608 states and 2455 transitions. [2023-04-01 04:17:11,870 INFO L78 Accepts]: Start accepts. Automaton has 1608 states and 2455 transitions. Word has length 67 [2023-04-01 04:17:11,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:17:11,872 INFO L495 AbstractCegarLoop]: Abstraction has 1608 states and 2455 transitions. [2023-04-01 04:17:11,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 4 states have internal predecessors, (61), 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 04:17:11,873 INFO L276 IsEmpty]: Start isEmpty. Operand 1608 states and 2455 transitions. [2023-04-01 04:17:11,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2023-04-01 04:17:11,889 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:17:11,889 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-04-01 04:17:11,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 04:17:11,890 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:17:11,890 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:17:11,890 INFO L85 PathProgramCache]: Analyzing trace with hash 1148806501, now seen corresponding path program 1 times [2023-04-01 04:17:11,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:17:11,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112468804] [2023-04-01 04:17:11,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:17:11,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:17:11,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:17:12,176 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 64 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:17:12,177 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:17:12,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112468804] [2023-04-01 04:17:12,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112468804] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:17:12,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824625842] [2023-04-01 04:17:12,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:17:12,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:17:12,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:17:12,183 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 04:17:12,188 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 04:17:12,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:17:12,305 INFO L262 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 04:17:12,310 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:17:12,426 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 64 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:17:12,426 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:17:12,661 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 64 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:17:12,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824625842] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 04:17:12,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1076746588] [2023-04-01 04:17:12,690 INFO L159 IcfgInterpreter]: Started Sifa with 77 locations of interest [2023-04-01 04:17:12,690 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 04:17:12,693 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 04:17:12,698 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 04:17:12,698 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 04:17:12,851 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 46 for LOIs [2023-04-01 04:17:13,034 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 11 [2023-04-01 04:17:24,123 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 50