/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_label37.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 16:41:05,519 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 16:41:05,522 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 16:41:05,565 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 16:41:05,565 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 16:41:05,568 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 16:41:05,569 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 16:41:05,570 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 16:41:05,572 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 16:41:05,575 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 16:41:05,576 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 16:41:05,577 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 16:41:05,577 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 16:41:05,578 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 16:41:05,578 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 16:41:05,579 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 16:41:05,580 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 16:41:05,580 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 16:41:05,581 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 16:41:05,583 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 16:41:05,584 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 16:41:05,587 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 16:41:05,588 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 16:41:05,590 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 16:41:05,595 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-02 16:41:05,595 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-02 16:41:05,596 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-02 16:41:05,596 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-02 16:41:05,597 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-02 16:41:05,597 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-02 16:41:05,597 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 16:41:05,598 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 16:41:05,599 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 16:41:05,599 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 16:41:05,600 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 16:41:05,600 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 16:41:05,601 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 16:41:05,601 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 16:41:05,601 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 16:41:05,605 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 16:41:05,606 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 16:41:05,609 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 16:41:05,639 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 16:41:05,640 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 16:41:05,640 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 16:41:05,640 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 16:41:05,641 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 16:41:05,641 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 16:41:05,641 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 16:41:05,641 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 16:41:05,641 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 16:41:05,641 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 16:41:05,642 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 16:41:05,642 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 16:41:05,642 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 16:41:05,642 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 16:41:05,643 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 16:41:05,643 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 16:41:05,643 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 16:41:05,643 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 16:41:05,643 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 16:41:05,643 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 16:41:05,644 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 16:41:05,644 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 16:41:05,644 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 16:41:05,644 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 16:41:05,644 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 16:41:05,644 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 16:41:05,644 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 16:41:05,644 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 16:41:05,644 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 16:41:05,645 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 16:41:05,645 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 16:41:05,645 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 16:41:05,645 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 16:41:05,645 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 16:41:05,645 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 16:41:05,645 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 16:41:05,646 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 16:41:05,646 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 16:41:05,646 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 16:41:05,646 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 16:41:05,646 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 16:41:05,646 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 16:41:05,827 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 16:41:05,851 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 16:41:05,855 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 16:41:05,856 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 16:41:05,857 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 16:41:05,858 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem03_label37.c [2023-04-02 16:41:06,965 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 16:41:07,295 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 16:41:07,296 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label37.c [2023-04-02 16:41:07,311 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/146042d9b/165edab009f740b3b08d1d61ac24eab1/FLAGf536d4655 [2023-04-02 16:41:07,325 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/146042d9b/165edab009f740b3b08d1d61ac24eab1 [2023-04-02 16:41:07,328 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 16:41:07,329 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 16:41:07,331 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 16:41:07,331 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 16:41:07,334 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 16:41:07,334 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 04:41:07" (1/1) ... [2023-04-02 16:41:07,335 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@dde6c91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:41:07, skipping insertion in model container [2023-04-02 16:41:07,336 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 04:41:07" (1/1) ... [2023-04-02 16:41:07,341 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 16:41:07,400 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 16:41:07,834 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_label37.c[54326,54339] [2023-04-02 16:41:07,884 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 16:41:07,894 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 16:41:08,143 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_label37.c[54326,54339] [2023-04-02 16:41:08,163 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 16:41:08,179 INFO L208 MainTranslator]: Completed translation [2023-04-02 16:41:08,180 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:41:08 WrapperNode [2023-04-02 16:41:08,180 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 16:41:08,181 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 16:41:08,181 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 16:41:08,181 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 16:41:08,191 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:41:08" (1/1) ... [2023-04-02 16:41:08,191 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:41:08" (1/1) ... [2023-04-02 16:41:08,230 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:41:08" (1/1) ... [2023-04-02 16:41:08,230 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:41:08" (1/1) ... [2023-04-02 16:41:08,335 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:41:08" (1/1) ... [2023-04-02 16:41:08,344 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:41:08" (1/1) ... [2023-04-02 16:41:08,367 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:41:08" (1/1) ... [2023-04-02 16:41:08,374 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:41:08" (1/1) ... [2023-04-02 16:41:08,382 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 16:41:08,383 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 16:41:08,384 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 16:41:08,384 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 16:41:08,385 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:41:08" (1/1) ... [2023-04-02 16:41:08,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 16:41:08,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 16:41:08,418 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 16:41:08,435 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 16:41:08,450 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 16:41:08,451 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 16:41:08,451 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 16:41:08,451 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-02 16:41:08,451 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 16:41:08,451 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-02 16:41:08,451 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 16:41:08,451 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 16:41:08,451 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 16:41:08,451 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 16:41:08,452 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-02 16:41:08,452 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-02 16:41:08,452 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 16:41:08,452 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 16:41:08,452 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 16:41:08,452 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 16:41:08,452 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 16:41:08,453 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 16:41:08,453 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 16:41:08,558 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 16:41:08,560 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 16:41:09,996 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 16:41:10,306 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 16:41:10,306 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-02 16:41:10,309 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 04:41:10 BoogieIcfgContainer [2023-04-02 16:41:10,310 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 16:41:10,312 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 16:41:10,312 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 16:41:10,315 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 16:41:10,315 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 04:41:07" (1/3) ... [2023-04-02 16:41:10,315 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bd5caad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 04:41:10, skipping insertion in model container [2023-04-02 16:41:10,315 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:41:08" (2/3) ... [2023-04-02 16:41:10,316 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bd5caad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 04:41:10, skipping insertion in model container [2023-04-02 16:41:10,316 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 04:41:10" (3/3) ... [2023-04-02 16:41:10,320 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label37.c [2023-04-02 16:41:10,334 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 16:41:10,335 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 16:41:10,387 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 16:41:10,394 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;@6e64aeb4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 16:41:10,394 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 16:41:10,400 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 16:41:10,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2023-04-02 16:41:10,415 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 16:41:10,416 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 16:41:10,416 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 16:41:10,421 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 16:41:10,422 INFO L85 PathProgramCache]: Analyzing trace with hash 597481859, now seen corresponding path program 1 times [2023-04-02 16:41:10,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 16:41:10,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466053270] [2023-04-02 16:41:10,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 16:41:10,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 16:41:10,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 16:41:11,480 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 16:41:11,481 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 16:41:11,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466053270] [2023-04-02 16:41:11,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466053270] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 16:41:11,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 16:41:11,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 16:41:11,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907808690] [2023-04-02 16:41:11,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 16:41:11,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 16:41:11,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 16:41:11,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 16:41:11,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 16:41:11,525 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 16:41:12,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 16:41:12,280 INFO L93 Difference]: Finished difference Result 462 states and 886 transitions. [2023-04-02 16:41:12,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 16:41:12,282 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 16:41:12,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 16:41:12,298 INFO L225 Difference]: With dead ends: 462 [2023-04-02 16:41:12,298 INFO L226 Difference]: Without dead ends: 301 [2023-04-02 16:41:12,301 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 16:41:12,306 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 30 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s 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, 0.7s IncrementalHoareTripleChecker+Time [2023-04-02 16:41:12,306 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 45 Invalid, 624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-02 16:41:12,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2023-04-02 16:41:12,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 301. [2023-04-02 16:41:12,371 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 16:41:12,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 563 transitions. [2023-04-02 16:41:12,374 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 563 transitions. Word has length 149 [2023-04-02 16:41:12,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 16:41:12,375 INFO L495 AbstractCegarLoop]: Abstraction has 301 states and 563 transitions. [2023-04-02 16:41:12,375 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 16:41:12,375 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 563 transitions. [2023-04-02 16:41:12,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2023-04-02 16:41:12,378 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 16:41:12,379 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 16:41:12,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 16:41:12,379 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 16:41:12,380 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 16:41:12,380 INFO L85 PathProgramCache]: Analyzing trace with hash 15656509, now seen corresponding path program 1 times [2023-04-02 16:41:12,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 16:41:12,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059675904] [2023-04-02 16:41:12,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 16:41:12,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 16:41:12,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 16:41:12,847 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 16:41:12,848 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 16:41:12,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059675904] [2023-04-02 16:41:12,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059675904] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 16:41:12,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 16:41:12,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 16:41:12,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439110397] [2023-04-02 16:41:12,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 16:41:12,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 16:41:12,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 16:41:12,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 16:41:12,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 16:41:12,851 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 16:41:13,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 16:41:13,254 INFO L93 Difference]: Finished difference Result 911 states and 1722 transitions. [2023-04-02 16:41:13,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 16:41:13,255 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 16:41:13,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 16:41:13,261 INFO L225 Difference]: With dead ends: 911 [2023-04-02 16:41:13,262 INFO L226 Difference]: Without dead ends: 615 [2023-04-02 16:41:13,269 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 16:41:13,271 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, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 16:41:13,272 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [773 Valid, 529 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 338 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 16:41:13,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2023-04-02 16:41:13,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 603. [2023-04-02 16:41:13,324 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 16:41:13,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 1134 transitions. [2023-04-02 16:41:13,329 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 1134 transitions. Word has length 158 [2023-04-02 16:41:13,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 16:41:13,335 INFO L495 AbstractCegarLoop]: Abstraction has 603 states and 1134 transitions. [2023-04-02 16:41:13,335 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 16:41:13,335 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 1134 transitions. [2023-04-02 16:41:13,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2023-04-02 16:41:13,345 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 16:41:13,345 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 16:41:13,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-02 16:41:13,347 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 16:41:13,347 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 16:41:13,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1985046745, now seen corresponding path program 1 times [2023-04-02 16:41:13,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 16:41:13,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376172365] [2023-04-02 16:41:13,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 16:41:13,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 16:41:13,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 16:41:14,136 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 16:41:14,136 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 16:41:14,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376172365] [2023-04-02 16:41:14,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376172365] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 16:41:14,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148175869] [2023-04-02 16:41:14,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 16:41:14,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 16:41:14,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 16:41:14,141 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 16:41:14,152 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 16:41:14,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 16:41:14,384 INFO L262 TraceCheckSpWp]: Trace formula consists of 846 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-02 16:41:14,398 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 16:41:14,646 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 16:41:14,647 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 16:41:14,898 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 16:41:14,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148175869] provided 1 perfect and 1 imperfect interpolant sequences [2023-04-02 16:41:14,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-04-02 16:41:14,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 9 [2023-04-02 16:41:14,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679020228] [2023-04-02 16:41:14,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 16:41:14,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 16:41:14,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 16:41:14,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 16:41:14,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-04-02 16:41:14,901 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 16:41:15,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 16:41:15,601 INFO L93 Difference]: Finished difference Result 1809 states and 3464 transitions. [2023-04-02 16:41:15,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-02 16:41:15,602 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 16:41:15,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 16:41:15,612 INFO L225 Difference]: With dead ends: 1809 [2023-04-02 16:41:15,612 INFO L226 Difference]: Without dead ends: 1211 [2023-04-02 16:41:15,614 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 316 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-04-02 16:41:15,616 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 271 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 543 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-02 16:41:15,617 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [271 Valid, 22 Invalid, 642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 543 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-02 16:41:15,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1211 states. [2023-04-02 16:41:15,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1211 to 1211. [2023-04-02 16:41:15,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1211 states, 1177 states have (on average 1.7238742565845369) internal successors, (2029), 1191 states have internal predecessors, (2029), 10 states have call successors, (10), 10 states have call predecessors, (10), 23 states have return successors, (92), 9 states have call predecessors, (92), 9 states have call successors, (92) [2023-04-02 16:41:15,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1211 states to 1211 states and 2131 transitions. [2023-04-02 16:41:15,662 INFO L78 Accepts]: Start accepts. Automaton has 1211 states and 2131 transitions. Word has length 160 [2023-04-02 16:41:15,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 16:41:15,664 INFO L495 AbstractCegarLoop]: Abstraction has 1211 states and 2131 transitions. [2023-04-02 16:41:15,664 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 16:41:15,664 INFO L276 IsEmpty]: Start isEmpty. Operand 1211 states and 2131 transitions. [2023-04-02 16:41:15,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2023-04-02 16:41:15,668 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 16:41:15,670 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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, 1, 1] [2023-04-02 16:41:15,681 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 16:41:15,877 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 16:41:15,878 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 16:41:15,878 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 16:41:15,879 INFO L85 PathProgramCache]: Analyzing trace with hash 555634259, now seen corresponding path program 1 times [2023-04-02 16:41:15,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 16:41:15,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383196299] [2023-04-02 16:41:15,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 16:41:15,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 16:41:15,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 16:41:16,260 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 16:41:16,260 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 16:41:16,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383196299] [2023-04-02 16:41:16,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383196299] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 16:41:16,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810976779] [2023-04-02 16:41:16,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 16:41:16,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 16:41:16,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 16:41:16,262 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 16:41:16,267 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 16:41:16,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 16:41:16,511 INFO L262 TraceCheckSpWp]: Trace formula consists of 1029 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-02 16:41:16,516 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 16:41:16,574 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-02 16:41:16,574 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 16:41:16,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810976779] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 16:41:16,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 16:41:16,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-04-02 16:41:16,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372202608] [2023-04-02 16:41:16,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 16:41:16,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 16:41:16,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 16:41:16,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 16:41:16,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-04-02 16:41:16,580 INFO L87 Difference]: Start difference. First operand 1211 states and 2131 transitions. Second operand has 5 states, 5 states have (on average 32.4) internal successors, (162), 4 states have internal predecessors, (162), 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 16:41:17,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 16:41:17,542 INFO L93 Difference]: Finished difference Result 3711 states and 6845 transitions. [2023-04-02 16:41:17,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 16:41:17,543 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 32.4) internal successors, (162), 4 states have internal predecessors, (162), 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 175 [2023-04-02 16:41:17,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 16:41:17,561 INFO L225 Difference]: With dead ends: 3711 [2023-04-02 16:41:17,561 INFO L226 Difference]: Without dead ends: 2505 [2023-04-02 16:41:17,564 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-04-02 16:41:17,566 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 509 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 905 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 509 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 1082 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 905 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-04-02 16:41:17,566 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [509 Valid, 38 Invalid, 1082 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 905 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-04-02 16:41:17,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2505 states. [2023-04-02 16:41:17,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2505 to 2477. [2023-04-02 16:41:17,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2477 states, 2382 states have (on average 1.5969773299748111) internal successors, (3804), 2441 states have internal predecessors, (3804), 18 states have call successors, (18), 18 states have call predecessors, (18), 76 states have return successors, (411), 17 states have call predecessors, (411), 17 states have call successors, (411) [2023-04-02 16:41:17,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2477 states to 2477 states and 4233 transitions. [2023-04-02 16:41:17,641 INFO L78 Accepts]: Start accepts. Automaton has 2477 states and 4233 transitions. Word has length 175 [2023-04-02 16:41:17,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 16:41:17,641 INFO L495 AbstractCegarLoop]: Abstraction has 2477 states and 4233 transitions. [2023-04-02 16:41:17,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 32.4) internal successors, (162), 4 states have internal predecessors, (162), 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 16:41:17,642 INFO L276 IsEmpty]: Start isEmpty. Operand 2477 states and 4233 transitions. [2023-04-02 16:41:17,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2023-04-02 16:41:17,649 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 16:41:17,649 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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 16:41:17,658 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 16:41:17,855 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 16:41:17,856 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 16:41:17,857 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 16:41:17,857 INFO L85 PathProgramCache]: Analyzing trace with hash -1395211465, now seen corresponding path program 1 times [2023-04-02 16:41:17,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 16:41:17,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626270529] [2023-04-02 16:41:17,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 16:41:17,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 16:41:17,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 16:41:18,146 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 16:41:18,147 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 16:41:18,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626270529] [2023-04-02 16:41:18,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626270529] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 16:41:18,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838681678] [2023-04-02 16:41:18,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 16:41:18,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 16:41:18,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 16:41:18,149 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 16:41:18,175 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 16:41:18,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 16:41:18,371 INFO L262 TraceCheckSpWp]: Trace formula consists of 1025 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-02 16:41:18,378 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 16:41:18,440 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 16:41:18,440 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 16:41:18,517 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 16:41:18,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838681678] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 16:41:18,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1987593571] [2023-04-02 16:41:18,564 INFO L159 IcfgInterpreter]: Started Sifa with 153 locations of interest [2023-04-02 16:41:18,564 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 16:41:18,567 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 16:41:18,571 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 16:41:18,571 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 16:41:19,322 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 162 for LOIs [2023-04-02 16:41:28,101 WARN L223 SmtUtils]: Spent 7.53s 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 16:42:08,479 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 24864 conjuctions. This might take some time... [2023-04-02 16:42:40,185 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 24864 conjuctions.