/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 IntervalDomain -i ../sv-benchmarks/c/eca-rers2012/Problem03_label37.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 21:20:51,616 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 21:20:51,618 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 21:20:51,654 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 21:20:51,654 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 21:20:51,657 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 21:20:51,660 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 21:20:51,662 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 21:20:51,664 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 21:20:51,668 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 21:20:51,669 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 21:20:51,671 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 21:20:51,671 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 21:20:51,673 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 21:20:51,674 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 21:20:51,675 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 21:20:51,676 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 21:20:51,677 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 21:20:51,679 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 21:20:51,684 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 21:20:51,685 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 21:20:51,686 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 21:20:51,688 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 21:20:51,689 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 21:20:51,693 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-31 21:20:51,693 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-31 21:20:51,693 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-31 21:20:51,695 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-31 21:20:51,695 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-31 21:20:51,695 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-31 21:20:51,696 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 21:20:51,696 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 21:20:51,697 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 21:20:51,698 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 21:20:51,699 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 21:20:51,699 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 21:20:51,700 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 21:20:51,700 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 21:20:51,700 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 21:20:51,701 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 21:20:51,701 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 21:20:51,702 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 [2023-03-31 21:20:51,732 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 21:20:51,732 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 21:20:51,733 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 21:20:51,733 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 21:20:51,734 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 21:20:51,734 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 21:20:51,734 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 21:20:51,734 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 21:20:51,734 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 21:20:51,734 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 21:20:51,735 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 21:20:51,735 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 21:20:51,735 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 21:20:51,735 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 21:20:51,736 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 21:20:51,736 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 21:20:51,736 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 21:20:51,736 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 21:20:51,737 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 21:20:51,737 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 21:20:51,737 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 21:20:51,737 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 21:20:51,737 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 21:20:51,737 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 21:20:51,737 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 21:20:51,738 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 21:20:51,738 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 21:20:51,738 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 21:20:51,738 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 21:20:51,738 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 21:20:51,739 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 21:20:51,739 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 21:20:51,739 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 21:20:51,739 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 21:20:51,739 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 21:20:51,739 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 21:20:51,739 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 21:20:51,739 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 21:20:51,740 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 21:20:51,740 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 21:20:51,740 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 21:20:51,740 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 21:20:51,974 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 21:20:51,997 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 21:20:51,998 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 21:20:51,999 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 21:20:51,999 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 21:20:52,000 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem03_label37.c [2023-03-31 21:20:53,119 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 21:20:53,437 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 21:20:53,438 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label37.c [2023-03-31 21:20:53,455 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5eed69f44/a12880388bbe47adab9d35d1ff797820/FLAG795c62953 [2023-03-31 21:20:53,470 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5eed69f44/a12880388bbe47adab9d35d1ff797820 [2023-03-31 21:20:53,473 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 21:20:53,474 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 21:20:53,476 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 21:20:53,476 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 21:20:53,480 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 21:20:53,480 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 09:20:53" (1/1) ... [2023-03-31 21:20:53,481 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6bda97b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:20:53, skipping insertion in model container [2023-03-31 21:20:53,482 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 09:20:53" (1/1) ... [2023-03-31 21:20:53,487 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 21:20:53,559 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 21:20:54,002 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] [2023-03-31 21:20:54,044 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 21:20:54,055 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 21:20:54,239 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] [2023-03-31 21:20:54,255 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 21:20:54,270 INFO L208 MainTranslator]: Completed translation [2023-03-31 21:20:54,271 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:20:54 WrapperNode [2023-03-31 21:20:54,271 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 21:20:54,272 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 21:20:54,272 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 21:20:54,272 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 21:20:54,283 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:20:54" (1/1) ... [2023-03-31 21:20:54,283 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:20:54" (1/1) ... [2023-03-31 21:20:54,312 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:20:54" (1/1) ... [2023-03-31 21:20:54,312 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:20:54" (1/1) ... [2023-03-31 21:20:54,406 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:20:54" (1/1) ... [2023-03-31 21:20:54,424 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:20:54" (1/1) ... [2023-03-31 21:20:54,438 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:20:54" (1/1) ... [2023-03-31 21:20:54,445 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:20:54" (1/1) ... [2023-03-31 21:20:54,457 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 21:20:54,461 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 21:20:54,461 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 21:20:54,462 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 21:20:54,463 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:20:54" (1/1) ... [2023-03-31 21:20:54,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 21:20:54,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:20:54,490 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) [2023-03-31 21:20:54,511 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 [2023-03-31 21:20:54,525 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 21:20:54,525 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 21:20:54,525 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 21:20:54,525 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-31 21:20:54,526 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 21:20:54,526 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-31 21:20:54,526 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 21:20:54,526 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 21:20:54,526 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 21:20:54,526 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 21:20:54,526 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 21:20:54,526 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-31 21:20:54,526 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 21:20:54,526 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 21:20:54,527 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 21:20:54,527 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 21:20:54,527 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 21:20:54,527 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 21:20:54,527 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 21:20:54,608 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 21:20:54,609 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 21:20:56,117 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 21:20:56,447 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 21:20:56,447 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-31 21:20:56,450 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 09:20:56 BoogieIcfgContainer [2023-03-31 21:20:56,450 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 21:20:56,453 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 21:20:56,453 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 21:20:56,456 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 21:20:56,456 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 09:20:53" (1/3) ... [2023-03-31 21:20:56,457 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e7cc4ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 09:20:56, skipping insertion in model container [2023-03-31 21:20:56,457 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:20:54" (2/3) ... [2023-03-31 21:20:56,457 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e7cc4ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 09:20:56, skipping insertion in model container [2023-03-31 21:20:56,457 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 09:20:56" (3/3) ... [2023-03-31 21:20:56,460 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label37.c [2023-03-31 21:20:56,475 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 21:20:56,475 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 21:20:56,527 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 21:20:56,533 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;@628785f2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 21:20:56,533 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 21:20:56,539 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) [2023-03-31 21:20:56,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2023-03-31 21:20:56,555 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:20:56,556 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] [2023-03-31 21:20:56,557 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:20:56,563 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:20:56,564 INFO L85 PathProgramCache]: Analyzing trace with hash 597481859, now seen corresponding path program 1 times [2023-03-31 21:20:56,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:20:56,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207467737] [2023-03-31 21:20:56,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:20:56,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:20:56,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:20:57,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:20:57,552 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:20:57,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207467737] [2023-03-31 21:20:57,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207467737] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:20:57,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 21:20:57,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 21:20:57,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733604675] [2023-03-31 21:20:57,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:20:57,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 21:20:57,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:20:57,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 21:20:57,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 21:20:57,599 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) [2023-03-31 21:20:58,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:20:58,323 INFO L93 Difference]: Finished difference Result 462 states and 886 transitions. [2023-03-31 21:20:58,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 21:20:58,328 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 [2023-03-31 21:20:58,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:20:58,344 INFO L225 Difference]: With dead ends: 462 [2023-03-31 21:20:58,345 INFO L226 Difference]: Without dead ends: 301 [2023-03-31 21:20:58,348 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 [2023-03-31 21:20:58,354 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 [2023-03-31 21:20:58,355 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] [2023-03-31 21:20:58,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2023-03-31 21:20:58,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 301. [2023-03-31 21:20:58,437 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) [2023-03-31 21:20:58,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 563 transitions. [2023-03-31 21:20:58,440 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 563 transitions. Word has length 149 [2023-03-31 21:20:58,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:20:58,444 INFO L495 AbstractCegarLoop]: Abstraction has 301 states and 563 transitions. [2023-03-31 21:20:58,444 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) [2023-03-31 21:20:58,445 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 563 transitions. [2023-03-31 21:20:58,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2023-03-31 21:20:58,457 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:20:58,458 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] [2023-03-31 21:20:58,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 21:20:58,458 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:20:58,459 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:20:58,459 INFO L85 PathProgramCache]: Analyzing trace with hash 15656509, now seen corresponding path program 1 times [2023-03-31 21:20:58,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:20:58,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214722452] [2023-03-31 21:20:58,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:20:58,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:20:58,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:20:58,935 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:20:58,936 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:20:58,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214722452] [2023-03-31 21:20:58,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214722452] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:20:58,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 21:20:58,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 21:20:58,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841083004] [2023-03-31 21:20:58,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:20:58,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 21:20:58,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:20:58,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 21:20:58,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 21:20:58,942 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) [2023-03-31 21:20:59,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:20:59,378 INFO L93 Difference]: Finished difference Result 911 states and 1722 transitions. [2023-03-31 21:20:59,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-31 21:20:59,379 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 [2023-03-31 21:20:59,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:20:59,385 INFO L225 Difference]: With dead ends: 911 [2023-03-31 21:20:59,385 INFO L226 Difference]: Without dead ends: 615 [2023-03-31 21:20:59,387 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 [2023-03-31 21:20:59,388 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 [2023-03-31 21:20:59,388 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] [2023-03-31 21:20:59,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2023-03-31 21:20:59,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 603. [2023-03-31 21:20:59,417 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) [2023-03-31 21:20:59,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 1134 transitions. [2023-03-31 21:20:59,420 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 1134 transitions. Word has length 158 [2023-03-31 21:20:59,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:20:59,420 INFO L495 AbstractCegarLoop]: Abstraction has 603 states and 1134 transitions. [2023-03-31 21:20:59,420 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) [2023-03-31 21:20:59,421 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 1134 transitions. [2023-03-31 21:20:59,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2023-03-31 21:20:59,423 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:20:59,424 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] [2023-03-31 21:20:59,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-31 21:20:59,424 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:20:59,424 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:20:59,424 INFO L85 PathProgramCache]: Analyzing trace with hash 1985046745, now seen corresponding path program 1 times [2023-03-31 21:20:59,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:20:59,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235333206] [2023-03-31 21:20:59,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:20:59,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:20:59,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:21:00,198 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:21:00,199 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:21:00,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235333206] [2023-03-31 21:21:00,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235333206] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 21:21:00,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194725104] [2023-03-31 21:21:00,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:21:00,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:21:00,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:21:00,205 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) [2023-03-31 21:21:00,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-31 21:21:00,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:21:00,486 INFO L262 TraceCheckSpWp]: Trace formula consists of 846 conjuncts, 8 conjunts are in the unsatisfiable core [2023-03-31 21:21:00,496 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 21:21:00,750 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-03-31 21:21:00,750 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 21:21:01,046 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-03-31 21:21:01,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194725104] provided 1 perfect and 1 imperfect interpolant sequences [2023-03-31 21:21:01,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-03-31 21:21:01,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 9 [2023-03-31 21:21:01,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504767227] [2023-03-31 21:21:01,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:21:01,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 21:21:01,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:21:01,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 21:21:01,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-03-31 21:21:01,049 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) [2023-03-31 21:21:01,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:21:01,637 INFO L93 Difference]: Finished difference Result 1809 states and 3464 transitions. [2023-03-31 21:21:01,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-03-31 21:21:01,638 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 [2023-03-31 21:21:01,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:21:01,645 INFO L225 Difference]: With dead ends: 1809 [2023-03-31 21:21:01,645 INFO L226 Difference]: Without dead ends: 1211 [2023-03-31 21:21:01,647 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 [2023-03-31 21:21:01,648 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 271 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 543 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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, 0.6s IncrementalHoareTripleChecker+Time [2023-03-31 21:21:01,648 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [271 Valid, 22 Invalid, 642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 543 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-03-31 21:21:01,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1211 states. [2023-03-31 21:21:01,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1211 to 1211. [2023-03-31 21:21:01,685 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) [2023-03-31 21:21:01,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1211 states to 1211 states and 2131 transitions. [2023-03-31 21:21:01,691 INFO L78 Accepts]: Start accepts. Automaton has 1211 states and 2131 transitions. Word has length 160 [2023-03-31 21:21:01,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:21:01,692 INFO L495 AbstractCegarLoop]: Abstraction has 1211 states and 2131 transitions. [2023-03-31 21:21:01,693 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) [2023-03-31 21:21:01,693 INFO L276 IsEmpty]: Start isEmpty. Operand 1211 states and 2131 transitions. [2023-03-31 21:21:01,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2023-03-31 21:21:01,698 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:21:01,698 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] [2023-03-31 21:21:01,709 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-03-31 21:21:01,907 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 [2023-03-31 21:21:01,907 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:21:01,908 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:21:01,908 INFO L85 PathProgramCache]: Analyzing trace with hash 555634259, now seen corresponding path program 1 times [2023-03-31 21:21:01,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:21:01,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76159969] [2023-03-31 21:21:01,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:21:01,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:21:01,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:21:02,312 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-31 21:21:02,312 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:21:02,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76159969] [2023-03-31 21:21:02,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76159969] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 21:21:02,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037695320] [2023-03-31 21:21:02,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:21:02,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:21:02,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:21:02,314 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) [2023-03-31 21:21:02,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-31 21:21:02,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:21:02,581 INFO L262 TraceCheckSpWp]: Trace formula consists of 1029 conjuncts, 6 conjunts are in the unsatisfiable core [2023-03-31 21:21:02,592 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 21:21:02,640 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-03-31 21:21:02,640 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 21:21:02,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037695320] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:21:02,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 21:21:02,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-03-31 21:21:02,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696020141] [2023-03-31 21:21:02,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:21:02,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 21:21:02,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:21:02,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 21:21:02,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-03-31 21:21:02,645 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) [2023-03-31 21:21:03,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:21:03,601 INFO L93 Difference]: Finished difference Result 3711 states and 6845 transitions. [2023-03-31 21:21:03,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 21:21:03,602 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 [2023-03-31 21:21:03,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:21:03,615 INFO L225 Difference]: With dead ends: 3711 [2023-03-31 21:21:03,615 INFO L226 Difference]: Without dead ends: 2505 [2023-03-31 21:21:03,618 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 [2023-03-31 21:21:03,619 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 [2023-03-31 21:21:03,619 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] [2023-03-31 21:21:03,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2505 states. [2023-03-31 21:21:03,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2505 to 2477. [2023-03-31 21:21:03,684 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) [2023-03-31 21:21:03,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2477 states to 2477 states and 4233 transitions. [2023-03-31 21:21:03,694 INFO L78 Accepts]: Start accepts. Automaton has 2477 states and 4233 transitions. Word has length 175 [2023-03-31 21:21:03,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:21:03,694 INFO L495 AbstractCegarLoop]: Abstraction has 2477 states and 4233 transitions. [2023-03-31 21:21:03,694 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) [2023-03-31 21:21:03,694 INFO L276 IsEmpty]: Start isEmpty. Operand 2477 states and 4233 transitions. [2023-03-31 21:21:03,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2023-03-31 21:21:03,701 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:21:03,702 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] [2023-03-31 21:21:03,710 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-03-31 21:21:03,909 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 [2023-03-31 21:21:03,910 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:21:03,910 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:21:03,910 INFO L85 PathProgramCache]: Analyzing trace with hash -1395211465, now seen corresponding path program 1 times [2023-03-31 21:21:03,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:21:03,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784958073] [2023-03-31 21:21:03,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:21:03,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:21:03,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:21:04,212 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:21:04,213 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:21:04,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784958073] [2023-03-31 21:21:04,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784958073] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 21:21:04,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058776739] [2023-03-31 21:21:04,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:21:04,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:21:04,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:21:04,215 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) [2023-03-31 21:21:04,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-03-31 21:21:04,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:21:04,493 INFO L262 TraceCheckSpWp]: Trace formula consists of 1025 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-31 21:21:04,497 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 21:21:04,550 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:21:04,550 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 21:21:04,618 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:21:04,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058776739] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 21:21:04,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [499767284] [2023-03-31 21:21:04,647 INFO L159 IcfgInterpreter]: Started Sifa with 153 locations of interest [2023-03-31 21:21:04,648 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 21:21:04,651 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 21:21:04,655 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 21:21:04,655 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 21:21:05,330 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 162 for LOIs [2023-03-31 21:21:08,090 INFO L197 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 148 for LOIs