/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_label57.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 16:48:44,012 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 16:48:44,014 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 16:48:44,049 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 16:48:44,049 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 16:48:44,052 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 16:48:44,054 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 16:48:44,055 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 16:48:44,057 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 16:48:44,062 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 16:48:44,062 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 16:48:44,063 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 16:48:44,063 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 16:48:44,064 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 16:48:44,065 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 16:48:44,065 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 16:48:44,066 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 16:48:44,067 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 16:48:44,068 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 16:48:44,069 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 16:48:44,070 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 16:48:44,071 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 16:48:44,071 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 16:48:44,072 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 16:48:44,075 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-02 16:48:44,075 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-02 16:48:44,075 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-02 16:48:44,076 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-02 16:48:44,076 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-02 16:48:44,076 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-02 16:48:44,077 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 16:48:44,077 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 16:48:44,078 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 16:48:44,078 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 16:48:44,079 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 16:48:44,079 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 16:48:44,079 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 16:48:44,079 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 16:48:44,079 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 16:48:44,080 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 16:48:44,080 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 16:48:44,083 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 16:48:44,104 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 16:48:44,105 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 16:48:44,105 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 16:48:44,105 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 16:48:44,106 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 16:48:44,106 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 16:48:44,106 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 16:48:44,106 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 16:48:44,106 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 16:48:44,106 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 16:48:44,107 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 16:48:44,107 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 16:48:44,107 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 16:48:44,107 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 16:48:44,107 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 16:48:44,107 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 16:48:44,107 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 16:48:44,108 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 16:48:44,108 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 16:48:44,108 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 16:48:44,108 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 16:48:44,108 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 16:48:44,108 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 16:48:44,108 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 16:48:44,109 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 16:48:44,109 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 16:48:44,109 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 16:48:44,109 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 16:48:44,109 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 16:48:44,109 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 16:48:44,109 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 16:48:44,110 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 16:48:44,110 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 16:48:44,110 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 16:48:44,110 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 16:48:44,110 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 16:48:44,110 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 16:48:44,110 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 16:48:44,110 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 16:48:44,110 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 16:48:44,110 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 16:48:44,110 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 16:48:44,298 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 16:48:44,321 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 16:48:44,323 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 16:48:44,324 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 16:48:44,324 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 16:48:44,325 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem03_label57.c [2023-04-02 16:48:45,300 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 16:48:45,577 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 16:48:45,577 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label57.c [2023-04-02 16:48:45,588 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed52e60e3/953274635593484fb0dd9512ec2225e8/FLAG3a174e663 [2023-04-02 16:48:45,879 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed52e60e3/953274635593484fb0dd9512ec2225e8 [2023-04-02 16:48:45,881 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 16:48:45,882 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 16:48:45,883 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 16:48:45,883 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 16:48:45,886 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 16:48:45,887 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 04:48:45" (1/1) ... [2023-04-02 16:48:45,887 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3823ce61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:48:45, skipping insertion in model container [2023-04-02 16:48:45,887 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 04:48:45" (1/1) ... [2023-04-02 16:48:45,892 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 16:48:45,949 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 16:48:46,355 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_label57.c[55951,55964] [2023-04-02 16:48:46,388 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 16:48:46,396 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 16:48:46,600 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_label57.c[55951,55964] [2023-04-02 16:48:46,611 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 16:48:46,624 INFO L208 MainTranslator]: Completed translation [2023-04-02 16:48:46,624 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:48:46 WrapperNode [2023-04-02 16:48:46,624 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 16:48:46,625 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 16:48:46,625 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 16:48:46,625 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 16:48:46,633 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:48:46" (1/1) ... [2023-04-02 16:48:46,634 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:48:46" (1/1) ... [2023-04-02 16:48:46,659 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:48:46" (1/1) ... [2023-04-02 16:48:46,659 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:48:46" (1/1) ... [2023-04-02 16:48:46,741 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:48:46" (1/1) ... [2023-04-02 16:48:46,758 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:48:46" (1/1) ... [2023-04-02 16:48:46,770 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:48:46" (1/1) ... [2023-04-02 16:48:46,776 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:48:46" (1/1) ... [2023-04-02 16:48:46,786 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 16:48:46,787 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 16:48:46,788 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 16:48:46,788 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 16:48:46,789 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:48:46" (1/1) ... [2023-04-02 16:48:46,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 16:48:46,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 16:48:46,822 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 16:48:46,827 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 16:48:46,847 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 16:48:46,849 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 16:48:46,849 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 16:48:46,849 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-02 16:48:46,849 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 16:48:46,849 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-02 16:48:46,850 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 16:48:46,850 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 16:48:46,850 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 16:48:46,850 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 16:48:46,850 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-02 16:48:46,850 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-02 16:48:46,850 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 16:48:46,850 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 16:48:46,850 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 16:48:46,850 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 16:48:46,850 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 16:48:46,850 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 16:48:46,851 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 16:48:46,909 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 16:48:46,910 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 16:48:48,223 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 16:48:48,445 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 16:48:48,445 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-02 16:48:48,449 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 04:48:48 BoogieIcfgContainer [2023-04-02 16:48:48,449 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 16:48:48,452 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 16:48:48,452 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 16:48:48,454 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 16:48:48,455 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 04:48:45" (1/3) ... [2023-04-02 16:48:48,455 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63d912a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 04:48:48, skipping insertion in model container [2023-04-02 16:48:48,455 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:48:46" (2/3) ... [2023-04-02 16:48:48,455 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63d912a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 04:48:48, skipping insertion in model container [2023-04-02 16:48:48,455 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 04:48:48" (3/3) ... [2023-04-02 16:48:48,457 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label57.c [2023-04-02 16:48:48,469 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 16:48:48,469 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 16:48:48,513 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 16:48:48,519 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;@643593f5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 16:48:48,519 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 16:48:48,524 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 16:48:48,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2023-04-02 16:48:48,538 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 16:48:48,539 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 16:48:48,539 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 16:48:48,545 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 16:48:48,545 INFO L85 PathProgramCache]: Analyzing trace with hash 597528176, now seen corresponding path program 1 times [2023-04-02 16:48:48,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 16:48:48,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56767207] [2023-04-02 16:48:48,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 16:48:48,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 16:48:48,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 16:48:49,408 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 16:48:49,409 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 16:48:49,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56767207] [2023-04-02 16:48:49,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56767207] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 16:48:49,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 16:48:49,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 16:48:49,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873654911] [2023-04-02 16:48:49,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 16:48:49,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 16:48:49,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 16:48:49,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 16:48:49,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 16:48:49,454 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 16:48:50,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 16:48:50,140 INFO L93 Difference]: Finished difference Result 462 states and 886 transitions. [2023-04-02 16:48:50,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 16:48:50,142 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 16:48:50,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 16:48:50,150 INFO L225 Difference]: With dead ends: 462 [2023-04-02 16:48:50,150 INFO L226 Difference]: Without dead ends: 301 [2023-04-02 16:48:50,153 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 16:48:50,155 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 30 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-02 16:48:50,156 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 45 Invalid, 624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-02 16:48:50,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2023-04-02 16:48:50,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 301. [2023-04-02 16:48:50,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 293 states have (on average 1.8907849829351535) internal successors, (554), 293 states have internal predecessors, (554), 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 16:48:50,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 563 transitions. [2023-04-02 16:48:50,213 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 563 transitions. Word has length 149 [2023-04-02 16:48:50,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 16:48:50,217 INFO L495 AbstractCegarLoop]: Abstraction has 301 states and 563 transitions. [2023-04-02 16:48:50,218 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 16:48:50,218 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 563 transitions. [2023-04-02 16:48:50,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2023-04-02 16:48:50,228 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 16:48:50,228 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1] [2023-04-02 16:48:50,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 16:48:50,229 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 16:48:50,229 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 16:48:50,229 INFO L85 PathProgramCache]: Analyzing trace with hash 15702826, now seen corresponding path program 1 times [2023-04-02 16:48:50,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 16:48:50,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554129774] [2023-04-02 16:48:50,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 16:48:50,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 16:48:50,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 16:48:50,624 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 16:48:50,624 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 16:48:50,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554129774] [2023-04-02 16:48:50,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554129774] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 16:48:50,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 16:48:50,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 16:48:50,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513614018] [2023-04-02 16:48:50,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 16:48:50,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 16:48:50,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 16:48:50,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 16:48:50,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 16:48:50,627 INFO L87 Difference]: Start difference. First operand 301 states and 563 transitions. Second operand has 5 states, 5 states have (on average 30.4) internal successors, (152), 4 states have internal predecessors, (152), 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 16:48:50,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 16:48:50,973 INFO L93 Difference]: Finished difference Result 911 states and 1722 transitions. [2023-04-02 16:48:50,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 16:48:50,974 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.4) internal successors, (152), 4 states have internal predecessors, (152), 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 158 [2023-04-02 16:48:50,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 16:48:50,980 INFO L225 Difference]: With dead ends: 911 [2023-04-02 16:48:50,980 INFO L226 Difference]: Without dead ends: 615 [2023-04-02 16:48:50,986 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-04-02 16:48:50,989 INFO L413 NwaCegarLoop]: 181 mSDtfsCounter, 773 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 773 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 16:48:50,989 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [773 Valid, 529 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 338 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 16:48:50,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2023-04-02 16:48:51,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 603. [2023-04-02 16:48:51,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 603 states, 587 states have (on average 1.879045996592845) internal successors, (1103), 591 states have internal predecessors, (1103), 6 states have call successors, (6), 6 states have call predecessors, (6), 9 states have return successors, (25), 5 states have call predecessors, (25), 5 states have call successors, (25) [2023-04-02 16:48:51,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 1134 transitions. [2023-04-02 16:48:51,041 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 1134 transitions. Word has length 158 [2023-04-02 16:48:51,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 16:48:51,045 INFO L495 AbstractCegarLoop]: Abstraction has 603 states and 1134 transitions. [2023-04-02 16:48:51,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.4) internal successors, (152), 4 states have internal predecessors, (152), 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 16:48:51,045 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 1134 transitions. [2023-04-02 16:48:51,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2023-04-02 16:48:51,047 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 16:48:51,047 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:48:51,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-02 16:48:51,048 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 16:48:51,048 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 16:48:51,048 INFO L85 PathProgramCache]: Analyzing trace with hash 1985093062, now seen corresponding path program 1 times [2023-04-02 16:48:51,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 16:48:51,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711277356] [2023-04-02 16:48:51,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 16:48:51,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 16:48:51,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 16:48:51,728 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 16:48:51,728 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 16:48:51,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711277356] [2023-04-02 16:48:51,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711277356] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 16:48:51,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083320661] [2023-04-02 16:48:51,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 16:48:51,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 16:48:51,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 16:48:51,733 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 16:48:51,743 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 16:48:51,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 16:48:51,968 INFO L262 TraceCheckSpWp]: Trace formula consists of 857 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-02 16:48:51,977 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 16:48:52,287 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-02 16:48:52,287 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 16:48:52,526 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-02 16:48:52,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083320661] provided 1 perfect and 1 imperfect interpolant sequences [2023-04-02 16:48:52,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-04-02 16:48:52,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 9 [2023-04-02 16:48:52,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738354179] [2023-04-02 16:48:52,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 16:48:52,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 16:48:52,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 16:48:52,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 16:48:52,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-04-02 16:48:52,532 INFO L87 Difference]: Start difference. First operand 603 states and 1134 transitions. Second operand has 4 states, 4 states have (on average 38.0) internal successors, (152), 3 states have internal predecessors, (152), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 16:48:53,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 16:48:53,046 INFO L93 Difference]: Finished difference Result 1803 states and 3456 transitions. [2023-04-02 16:48:53,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-02 16:48:53,047 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.0) internal successors, (152), 3 states have internal predecessors, (152), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 160 [2023-04-02 16:48:53,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 16:48:53,053 INFO L225 Difference]: With dead ends: 1803 [2023-04-02 16:48:53,053 INFO L226 Difference]: Without dead ends: 1205 [2023-04-02 16:48:53,054 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 316 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-04-02 16:48:53,055 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 182 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-02 16:48:53,055 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 61 Invalid, 607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 501 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-02 16:48:53,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1205 states. [2023-04-02 16:48:53,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1205 to 1205. [2023-04-02 16:48:53,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1205 states, 1174 states have (on average 1.850085178875639) internal successors, (2172), 1185 states have internal predecessors, (2172), 10 states have call successors, (10), 10 states have call predecessors, (10), 20 states have return successors, (100), 9 states have call predecessors, (100), 9 states have call successors, (100) [2023-04-02 16:48:53,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1205 states to 1205 states and 2282 transitions. [2023-04-02 16:48:53,083 INFO L78 Accepts]: Start accepts. Automaton has 1205 states and 2282 transitions. Word has length 160 [2023-04-02 16:48:53,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 16:48:53,084 INFO L495 AbstractCegarLoop]: Abstraction has 1205 states and 2282 transitions. [2023-04-02 16:48:53,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.0) internal successors, (152), 3 states have internal predecessors, (152), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 16:48:53,084 INFO L276 IsEmpty]: Start isEmpty. Operand 1205 states and 2282 transitions. [2023-04-02 16:48:53,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2023-04-02 16:48:53,088 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 16:48:53,088 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2023-04-02 16:48:53,111 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 16:48:53,296 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 16:48:53,296 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 16:48:53,297 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 16:48:53,297 INFO L85 PathProgramCache]: Analyzing trace with hash -1413918771, now seen corresponding path program 1 times [2023-04-02 16:48:53,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 16:48:53,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339656598] [2023-04-02 16:48:53,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 16:48:53,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 16:48:53,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 16:48:53,641 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 16:48:53,642 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 16:48:53,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339656598] [2023-04-02 16:48:53,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339656598] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 16:48:53,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539808097] [2023-04-02 16:48:53,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 16:48:53,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 16:48:53,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 16:48:53,643 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 16:48:53,646 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 16:48:53,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 16:48:53,870 INFO L262 TraceCheckSpWp]: Trace formula consists of 1009 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-02 16:48:53,879 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 16:48:53,915 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-02 16:48:53,915 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 16:48:53,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539808097] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 16:48:53,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 16:48:53,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-04-02 16:48:53,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112342237] [2023-04-02 16:48:53,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 16:48:53,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 16:48:53,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 16:48:53,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 16:48:53,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-04-02 16:48:53,920 INFO L87 Difference]: Start difference. First operand 1205 states and 2282 transitions. Second operand has 5 states, 5 states have (on average 30.6) internal successors, (153), 4 states have internal predecessors, (153), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 16:48:54,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 16:48:54,607 INFO L93 Difference]: Finished difference Result 3713 states and 7440 transitions. [2023-04-02 16:48:54,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 16:48:54,608 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.6) internal successors, (153), 4 states have internal predecessors, (153), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 168 [2023-04-02 16:48:54,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 16:48:54,623 INFO L225 Difference]: With dead ends: 3713 [2023-04-02 16:48:54,623 INFO L226 Difference]: Without dead ends: 2513 [2023-04-02 16:48:54,626 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-04-02 16:48:54,628 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 568 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 849 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 568 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 849 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-02 16:48:54,630 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [568 Valid, 37 Invalid, 985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 849 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-02 16:48:54,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2513 states. [2023-04-02 16:48:54,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2513 to 2467. [2023-04-02 16:48:54,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2467 states, 2377 states have (on average 1.698359276398822) internal successors, (4037), 2431 states have internal predecessors, (4037), 18 states have call successors, (18), 18 states have call predecessors, (18), 71 states have return successors, (400), 17 states have call predecessors, (400), 17 states have call successors, (400) [2023-04-02 16:48:54,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2467 states to 2467 states and 4455 transitions. [2023-04-02 16:48:54,749 INFO L78 Accepts]: Start accepts. Automaton has 2467 states and 4455 transitions. Word has length 168 [2023-04-02 16:48:54,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 16:48:54,749 INFO L495 AbstractCegarLoop]: Abstraction has 2467 states and 4455 transitions. [2023-04-02 16:48:54,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.6) internal successors, (153), 4 states have internal predecessors, (153), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 16:48:54,750 INFO L276 IsEmpty]: Start isEmpty. Operand 2467 states and 4455 transitions. [2023-04-02 16:48:54,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2023-04-02 16:48:54,756 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 16:48:54,756 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:48:54,764 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-02 16:48:54,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-04-02 16:48:54,964 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 16:48:54,965 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 16:48:54,965 INFO L85 PathProgramCache]: Analyzing trace with hash 478152846, now seen corresponding path program 1 times [2023-04-02 16:48:54,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 16:48:54,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64727613] [2023-04-02 16:48:54,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 16:48:54,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 16:48:55,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 16:48:55,665 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 16:48:55,665 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 16:48:55,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64727613] [2023-04-02 16:48:55,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64727613] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 16:48:55,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 16:48:55,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 16:48:55,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917530842] [2023-04-02 16:48:55,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 16:48:55,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 16:48:55,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 16:48:55,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 16:48:55,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 16:48:55,667 INFO L87 Difference]: Start difference. First operand 2467 states and 4455 transitions. Second operand has 5 states, 5 states have (on average 33.2) internal successors, (166), 4 states have internal predecessors, (166), 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 16:48:56,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 16:48:56,375 INFO L93 Difference]: Finished difference Result 7487 states and 14355 transitions. [2023-04-02 16:48:56,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-02 16:48:56,376 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 33.2) internal successors, (166), 4 states have internal predecessors, (166), 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 172 [2023-04-02 16:48:56,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 16:48:56,405 INFO L225 Difference]: With dead ends: 7487 [2023-04-02 16:48:56,406 INFO L226 Difference]: Without dead ends: 5025 [2023-04-02 16:48:56,414 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 16:48:56,415 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 425 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 884 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 425 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 1098 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 884 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-02 16:48:56,415 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [425 Valid, 51 Invalid, 1098 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 884 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-02 16:48:56,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5025 states. [2023-04-02 16:48:56,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5025 to 4985. [2023-04-02 16:48:56,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4985 states, 4780 states have (on average 1.5623430962343097) internal successors, (7468), 4917 states have internal predecessors, (7468), 34 states have call successors, (34), 34 states have call predecessors, (34), 170 states have return successors, (1287), 33 states have call predecessors, (1287), 33 states have call successors, (1287) [2023-04-02 16:48:56,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4985 states to 4985 states and 8789 transitions. [2023-04-02 16:48:56,606 INFO L78 Accepts]: Start accepts. Automaton has 4985 states and 8789 transitions. Word has length 172 [2023-04-02 16:48:56,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 16:48:56,606 INFO L495 AbstractCegarLoop]: Abstraction has 4985 states and 8789 transitions. [2023-04-02 16:48:56,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.2) internal successors, (166), 4 states have internal predecessors, (166), 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 16:48:56,606 INFO L276 IsEmpty]: Start isEmpty. Operand 4985 states and 8789 transitions. [2023-04-02 16:48:56,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2023-04-02 16:48:56,618 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 16:48:56,619 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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] [2023-04-02 16:48:56,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-02 16:48:56,619 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 16:48:56,619 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 16:48:56,619 INFO L85 PathProgramCache]: Analyzing trace with hash 1672587051, now seen corresponding path program 1 times [2023-04-02 16:48:56,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 16:48:56,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706207124] [2023-04-02 16:48:56,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 16:48:56,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 16:48:56,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 16:48:57,268 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 19 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 16:48:57,268 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 16:48:57,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706207124] [2023-04-02 16:48:57,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706207124] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 16:48:57,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138666026] [2023-04-02 16:48:57,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 16:48:57,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 16:48:57,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 16:48:57,270 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 16:48:57,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-02 16:48:57,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 16:48:57,492 INFO L262 TraceCheckSpWp]: Trace formula consists of 1023 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-02 16:48:57,499 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 16:48:57,533 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 28 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 16:48:57,533 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 16:48:57,590 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 28 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 16:48:57,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138666026] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 16:48:57,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1403751678] [2023-04-02 16:48:57,613 INFO L159 IcfgInterpreter]: Started Sifa with 153 locations of interest [2023-04-02 16:48:57,613 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 16:48:57,616 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 16:48:57,619 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 16:48:57,619 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 16:48:58,307 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 162 for LOIs [2023-04-02 16:49:06,491 WARN L223 SmtUtils]: Spent 7.30s 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 16:49:52,202 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 24864 conjuctions. This might take some time... [2023-04-02 16:50:27,592 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 24864 conjuctions.