/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/Problem03_label19.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 16:35:44,161 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 16:35:44,163 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 16:35:44,193 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 16:35:44,193 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 16:35:44,195 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 16:35:44,197 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 16:35:44,199 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 16:35:44,201 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 16:35:44,205 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 16:35:44,206 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 16:35:44,207 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 16:35:44,207 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 16:35:44,209 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 16:35:44,209 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 16:35:44,210 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 16:35:44,211 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 16:35:44,211 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 16:35:44,213 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 16:35:44,216 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 16:35:44,217 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 16:35:44,218 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 16:35:44,219 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 16:35:44,219 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 16:35:44,226 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-02 16:35:44,226 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-02 16:35:44,226 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-02 16:35:44,227 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-02 16:35:44,227 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-02 16:35:44,228 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-02 16:35:44,228 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 16:35:44,228 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 16:35:44,230 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 16:35:44,230 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 16:35:44,230 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 16:35:44,231 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 16:35:44,231 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 16:35:44,231 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 16:35:44,231 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 16:35:44,232 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 16:35:44,232 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 16:35:44,233 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-02 16:35:44,256 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 16:35:44,256 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 16:35:44,257 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 16:35:44,257 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 16:35:44,258 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 16:35:44,258 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 16:35:44,258 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 16:35:44,258 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 16:35:44,258 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 16:35:44,258 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 16:35:44,259 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 16:35:44,259 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 16:35:44,259 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 16:35:44,259 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 16:35:44,259 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 16:35:44,259 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 16:35:44,259 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 16:35:44,260 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 16:35:44,260 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 16:35:44,260 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 16:35:44,260 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 16:35:44,260 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 16:35:44,260 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 16:35:44,260 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 16:35:44,260 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 16:35:44,261 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 16:35:44,261 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 16:35:44,261 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 16:35:44,261 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 16:35:44,261 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 16:35:44,261 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 16:35:44,262 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 16:35:44,262 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 16:35:44,262 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 16:35:44,262 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 16:35:44,262 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 16:35:44,262 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 16:35:44,262 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 16:35:44,262 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 16:35:44,262 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 16:35:44,262 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 16:35:44,262 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 16:35:44,449 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 16:35:44,473 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 16:35:44,475 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 16:35:44,476 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 16:35:44,477 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 16:35:44,477 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem03_label19.c [2023-04-02 16:35:45,379 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 16:35:45,683 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 16:35:45,684 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label19.c [2023-04-02 16:35:45,698 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/80f76076a/e55893a2744747e69bdc7bc52269ef5b/FLAG5884a1697 [2023-04-02 16:35:45,710 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/80f76076a/e55893a2744747e69bdc7bc52269ef5b [2023-04-02 16:35:45,712 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 16:35:45,713 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 16:35:45,716 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 16:35:45,716 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 16:35:45,718 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 16:35:45,719 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 04:35:45" (1/1) ... [2023-04-02 16:35:45,719 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2305fbf6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:35:45, skipping insertion in model container [2023-04-02 16:35:45,720 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 04:35:45" (1/1) ... [2023-04-02 16:35:45,724 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 16:35:45,768 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 16:35:46,137 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/Problem03_label19.c[59475,59488] [2023-04-02 16:35:46,162 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 16:35:46,171 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 16:35:46,314 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/Problem03_label19.c[59475,59488] [2023-04-02 16:35:46,348 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 16:35:46,361 INFO L208 MainTranslator]: Completed translation [2023-04-02 16:35:46,362 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:35:46 WrapperNode [2023-04-02 16:35:46,362 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 16:35:46,376 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 16:35:46,377 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 16:35:46,377 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 16:35:46,401 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:35:46" (1/1) ... [2023-04-02 16:35:46,401 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:35:46" (1/1) ... [2023-04-02 16:35:46,449 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:35:46" (1/1) ... [2023-04-02 16:35:46,449 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:35:46" (1/1) ... [2023-04-02 16:35:46,488 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:35:46" (1/1) ... [2023-04-02 16:35:46,511 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:35:46" (1/1) ... [2023-04-02 16:35:46,519 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:35:46" (1/1) ... [2023-04-02 16:35:46,526 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:35:46" (1/1) ... [2023-04-02 16:35:46,551 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 16:35:46,552 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 16:35:46,552 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 16:35:46,552 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 16:35:46,552 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:35:46" (1/1) ... [2023-04-02 16:35:46,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 16:35:46,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 16:35:46,581 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-02 16:35:46,611 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 16:35:46,611 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 16:35:46,611 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 16:35:46,611 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-02 16:35:46,612 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 16:35:46,612 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-02 16:35:46,612 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 16:35:46,612 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 16:35:46,612 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 16:35:46,612 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 16:35:46,612 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-02 16:35:46,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-02 16:35:46,613 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-02 16:35:46,613 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 16:35:46,613 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 16:35:46,613 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 16:35:46,613 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 16:35:46,613 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 16:35:46,614 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 16:35:46,614 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 16:35:46,690 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 16:35:46,692 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 16:35:47,827 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 16:35:48,068 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 16:35:48,069 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-02 16:35:48,071 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 04:35:48 BoogieIcfgContainer [2023-04-02 16:35:48,071 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 16:35:48,073 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 16:35:48,073 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 16:35:48,075 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 16:35:48,075 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 04:35:45" (1/3) ... [2023-04-02 16:35:48,076 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e6a572d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 04:35:48, skipping insertion in model container [2023-04-02 16:35:48,076 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:35:46" (2/3) ... [2023-04-02 16:35:48,076 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e6a572d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 04:35:48, skipping insertion in model container [2023-04-02 16:35:48,076 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 04:35:48" (3/3) ... [2023-04-02 16:35:48,077 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label19.c [2023-04-02 16:35:48,089 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 16:35:48,089 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 16:35:48,129 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 16:35:48,133 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;@65dabc58, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 16:35:48,133 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 16:35:48,137 INFO L276 IsEmpty]: Start isEmpty. Operand has 158 states, 150 states have (on average 1.9466666666666668) internal successors, (292), 151 states have internal predecessors, (292), 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) [2023-04-02 16:35:48,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2023-04-02 16:35:48,147 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 16:35:48,147 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 16:35:48,148 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 16:35:48,151 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 16:35:48,151 INFO L85 PathProgramCache]: Analyzing trace with hash 729864343, now seen corresponding path program 1 times [2023-04-02 16:35:48,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 16:35:48,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716560901] [2023-04-02 16:35:48,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 16:35:48,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 16:35:48,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 16:35:49,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 16:35:49,237 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 16:35:49,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716560901] [2023-04-02 16:35:49,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716560901] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 16:35:49,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 16:35:49,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 16:35:49,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197998210] [2023-04-02 16:35:49,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 16:35:49,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 16:35:49,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 16:35:49,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 16:35:49,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 16:35:49,280 INFO L87 Difference]: Start difference. First operand has 158 states, 150 states have (on average 1.9466666666666668) internal successors, (292), 151 states have internal predecessors, (292), 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 48.333333333333336) internal successors, (145), 2 states have internal predecessors, (145), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 16:35:49,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 16:35:49,904 INFO L93 Difference]: Finished difference Result 462 states and 886 transitions. [2023-04-02 16:35:49,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 16:35:49,914 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 2 states have internal predecessors, (145), 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 149 [2023-04-02 16:35:49,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 16:35:49,928 INFO L225 Difference]: With dead ends: 462 [2023-04-02 16:35:49,928 INFO L226 Difference]: Without dead ends: 301 [2023-04-02 16:35:49,931 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 16:35:49,935 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 17 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 463 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-02 16:35:49,936 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 121 Invalid, 577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 463 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-02 16:35:49,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2023-04-02 16:35:49,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 301. [2023-04-02 16:35:49,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 293 states have (on average 1.583617747440273) internal successors, (464), 293 states have internal predecessors, (464), 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) [2023-04-02 16:35:49,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 473 transitions. [2023-04-02 16:35:49,989 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 473 transitions. Word has length 149 [2023-04-02 16:35:49,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 16:35:49,989 INFO L495 AbstractCegarLoop]: Abstraction has 301 states and 473 transitions. [2023-04-02 16:35:49,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 2 states have internal predecessors, (145), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 16:35:49,990 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 473 transitions. [2023-04-02 16:35:49,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2023-04-02 16:35:49,992 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 16:35:49,993 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 16:35:49,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 16:35:49,993 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 16:35:49,993 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 16:35:49,993 INFO L85 PathProgramCache]: Analyzing trace with hash -455543050, now seen corresponding path program 1 times [2023-04-02 16:35:49,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 16:35:49,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525557515] [2023-04-02 16:35:49,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 16:35:49,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 16:35:50,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 16:35:50,270 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 16:35:50,270 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 16:35:50,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525557515] [2023-04-02 16:35:50,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525557515] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 16:35:50,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 16:35:50,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 16:35:50,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162187574] [2023-04-02 16:35:50,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 16:35:50,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 16:35:50,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 16:35:50,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 16:35:50,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 16:35:50,273 INFO L87 Difference]: Start difference. First operand 301 states and 473 transitions. Second operand has 5 states, 5 states have (on average 31.0) internal successors, (155), 4 states have internal predecessors, (155), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 16:35:50,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 16:35:50,979 INFO L93 Difference]: Finished difference Result 913 states and 1455 transitions. [2023-04-02 16:35:50,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-02 16:35:50,981 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.0) internal successors, (155), 4 states have internal predecessors, (155), 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 161 [2023-04-02 16:35:50,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 16:35:50,984 INFO L225 Difference]: With dead ends: 913 [2023-04-02 16:35:50,984 INFO L226 Difference]: Without dead ends: 617 [2023-04-02 16:35:50,985 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-04-02 16:35:50,986 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 494 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 862 mSolverCounterSat, 256 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 494 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 1118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 256 IncrementalHoareTripleChecker+Valid, 862 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-02 16:35:50,987 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [494 Valid, 48 Invalid, 1118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [256 Valid, 862 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-02 16:35:50,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2023-04-02 16:35:51,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 603. [2023-04-02 16:35:51,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 603 states, 587 states have (on average 1.5383304940374787) internal successors, (903), 591 states have internal predecessors, (903), 6 states have call successors, (6), 6 states have call predecessors, (6), 9 states have return successors, (23), 5 states have call predecessors, (23), 5 states have call successors, (23) [2023-04-02 16:35:51,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 932 transitions. [2023-04-02 16:35:51,008 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 932 transitions. Word has length 161 [2023-04-02 16:35:51,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 16:35:51,009 INFO L495 AbstractCegarLoop]: Abstraction has 603 states and 932 transitions. [2023-04-02 16:35:51,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.0) internal successors, (155), 4 states have internal predecessors, (155), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 16:35:51,009 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 932 transitions. [2023-04-02 16:35:51,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2023-04-02 16:35:51,012 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 16:35:51,012 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 16:35:51,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-02 16:35:51,012 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 16:35:51,012 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 16:35:51,012 INFO L85 PathProgramCache]: Analyzing trace with hash -2038818729, now seen corresponding path program 1 times [2023-04-02 16:35:51,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 16:35:51,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82901921] [2023-04-02 16:35:51,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 16:35:51,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 16:35:51,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 16:35:52,266 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 16:35:52,266 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 16:35:52,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82901921] [2023-04-02 16:35:52,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82901921] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 16:35:52,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045983598] [2023-04-02 16:35:52,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 16:35:52,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 16:35:52,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 16:35:52,271 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 16:35:52,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-02 16:35:52,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 16:35:52,468 INFO L262 TraceCheckSpWp]: Trace formula consists of 904 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-02 16:35:52,475 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 16:35:52,683 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 16:35:52,684 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 16:35:52,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045983598] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 16:35:52,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 16:35:52,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-04-02 16:35:52,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691771094] [2023-04-02 16:35:52,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 16:35:52,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 16:35:52,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 16:35:52,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 16:35:52,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-04-02 16:35:52,686 INFO L87 Difference]: Start difference. First operand 603 states and 932 transitions. Second operand has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-02 16:35:53,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 16:35:53,171 INFO L93 Difference]: Finished difference Result 1797 states and 2824 transitions. [2023-04-02 16:35:53,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 16:35:53,172 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 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 170 [2023-04-02 16:35:53,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 16:35:53,176 INFO L225 Difference]: With dead ends: 1797 [2023-04-02 16:35:53,176 INFO L226 Difference]: Without dead ends: 1199 [2023-04-02 16:35:53,178 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-04-02 16:35:53,179 INFO L413 NwaCegarLoop]: 213 mSDtfsCounter, 38 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 457 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-02 16:35:53,179 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 226 Invalid, 586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 457 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-02 16:35:53,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1199 states. [2023-04-02 16:35:53,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1199 to 1199. [2023-04-02 16:35:53,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1199 states, 1171 states have (on average 1.4491887275832622) internal successors, (1697), 1179 states have internal predecessors, (1697), 10 states have call successors, (10), 10 states have call predecessors, (10), 17 states have return successors, (67), 9 states have call predecessors, (67), 9 states have call successors, (67) [2023-04-02 16:35:53,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1199 states to 1199 states and 1774 transitions. [2023-04-02 16:35:53,220 INFO L78 Accepts]: Start accepts. Automaton has 1199 states and 1774 transitions. Word has length 170 [2023-04-02 16:35:53,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 16:35:53,221 INFO L495 AbstractCegarLoop]: Abstraction has 1199 states and 1774 transitions. [2023-04-02 16:35:53,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-02 16:35:53,221 INFO L276 IsEmpty]: Start isEmpty. Operand 1199 states and 1774 transitions. [2023-04-02 16:35:53,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2023-04-02 16:35:53,224 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 16:35:53,224 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 16:35:53,233 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-02 16:35:53,424 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 [2023-04-02 16:35:53,425 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 16:35:53,425 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 16:35:53,425 INFO L85 PathProgramCache]: Analyzing trace with hash -370392941, now seen corresponding path program 1 times [2023-04-02 16:35:53,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 16:35:53,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239368793] [2023-04-02 16:35:53,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 16:35:53,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 16:35:53,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 16:35:53,906 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 29 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 16:35:53,907 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 16:35:53,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239368793] [2023-04-02 16:35:53,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239368793] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 16:35:53,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614572519] [2023-04-02 16:35:53,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 16:35:53,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 16:35:53,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 16:35:53,911 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 16:35:53,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-02 16:35:54,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 16:35:54,100 INFO L262 TraceCheckSpWp]: Trace formula consists of 1056 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-02 16:35:54,108 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 16:35:54,165 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 29 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 16:35:54,165 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 16:35:54,232 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 29 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 16:35:54,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614572519] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 16:35:54,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [969073892] [2023-04-02 16:35:54,255 INFO L159 IcfgInterpreter]: Started Sifa with 153 locations of interest [2023-04-02 16:35:54,255 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 16:35:54,259 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 16:35:54,263 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 16:35:54,263 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 16:35:54,932 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 162 for LOIs [2023-04-02 16:36:02,901 WARN L223 SmtUtils]: Spent 7.08s on a formula simplification that was a NOOP. DAG size: 962 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2023-04-02 16:36:45,185 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 24864 conjuctions. This might take some time... [2023-04-02 16:37:29,529 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 24864 conjuctions.