/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/Problem15_label10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 04:13:12,584 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 04:13:12,586 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 04:13:12,625 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 04:13:12,625 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 04:13:12,628 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 04:13:12,631 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 04:13:12,634 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 04:13:12,635 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 04:13:12,640 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 04:13:12,641 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 04:13:12,643 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 04:13:12,643 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 04:13:12,645 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 04:13:12,646 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 04:13:12,647 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 04:13:12,648 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 04:13:12,649 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 04:13:12,651 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 04:13:12,656 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 04:13:12,657 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 04:13:12,658 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 04:13:12,659 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 04:13:12,660 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 04:13:12,668 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 04:13:12,668 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 04:13:12,668 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 04:13:12,670 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 04:13:12,670 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 04:13:12,671 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 04:13:12,671 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 04:13:12,672 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 04:13:12,673 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 04:13:12,674 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 04:13:12,674 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 04:13:12,674 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 04:13:12,675 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 04:13:12,675 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 04:13:12,675 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 04:13:12,676 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 04:13:12,677 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 04:13:12,677 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 04:13:12,708 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 04:13:12,708 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 04:13:12,709 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 04:13:12,709 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 04:13:12,711 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 04:13:12,711 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 04:13:12,711 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 04:13:12,711 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 04:13:12,711 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 04:13:12,711 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 04:13:12,712 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 04:13:12,712 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 04:13:12,712 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 04:13:12,713 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 04:13:12,713 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 04:13:12,713 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 04:13:12,713 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 04:13:12,713 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 04:13:12,714 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 04:13:12,714 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 04:13:12,714 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 04:13:12,714 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 04:13:12,714 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 04:13:12,714 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 04:13:12,715 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 04:13:12,715 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 04:13:12,715 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 04:13:12,715 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 04:13:12,715 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 04:13:12,715 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 04:13:12,715 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 04:13:12,716 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 04:13:12,716 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:13:12,716 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 04:13:12,716 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 04:13:12,716 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 04:13:12,716 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 04:13:12,716 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 04:13:12,717 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 04:13:12,717 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 04:13:12,717 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 04:13:12,717 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 04:13:12,962 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 04:13:12,993 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 04:13:12,995 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 04:13:12,997 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 04:13:12,997 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 04:13:12,998 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem15_label10.c [2023-04-01 04:13:14,211 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 04:13:14,563 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 04:13:14,564 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem15_label10.c [2023-04-01 04:13:14,587 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8fca460a3/e0f9c2d0939c4c24b02499b5be2e1b64/FLAGfef5f9e2e [2023-04-01 04:13:14,600 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8fca460a3/e0f9c2d0939c4c24b02499b5be2e1b64 [2023-04-01 04:13:14,603 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 04:13:14,604 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 04:13:14,605 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 04:13:14,605 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 04:13:14,608 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 04:13:14,609 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:13:14" (1/1) ... [2023-04-01 04:13:14,610 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c3cdd2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:13:14, skipping insertion in model container [2023-04-01 04:13:14,610 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:13:14" (1/1) ... [2023-04-01 04:13:14,616 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 04:13:14,682 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 04:13:14,893 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/Problem15_label10.c[4275,4288] [2023-04-01 04:13:15,326 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:13:15,347 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 04:13:15,376 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/Problem15_label10.c[4275,4288] [2023-04-01 04:13:15,535 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:13:15,550 INFO L208 MainTranslator]: Completed translation [2023-04-01 04:13:15,551 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:13:15 WrapperNode [2023-04-01 04:13:15,551 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 04:13:15,552 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 04:13:15,552 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 04:13:15,553 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 04:13:15,563 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:13:15" (1/1) ... [2023-04-01 04:13:15,563 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:13:15" (1/1) ... [2023-04-01 04:13:15,606 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:13:15" (1/1) ... [2023-04-01 04:13:15,606 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:13:15" (1/1) ... [2023-04-01 04:13:15,672 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:13:15" (1/1) ... [2023-04-01 04:13:15,692 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:13:15" (1/1) ... [2023-04-01 04:13:15,721 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:13:15" (1/1) ... [2023-04-01 04:13:15,732 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:13:15" (1/1) ... [2023-04-01 04:13:15,752 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 04:13:15,753 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 04:13:15,753 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 04:13:15,753 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 04:13:15,755 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:13:15" (1/1) ... [2023-04-01 04:13:15,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:13:15,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:13:15,790 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 04:13:15,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 04:13:15,834 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 04:13:15,834 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 04:13:15,834 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 04:13:15,835 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 04:13:15,835 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 04:13:15,835 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 04:13:15,835 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 04:13:15,835 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 04:13:15,835 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 04:13:15,835 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 04:13:15,835 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 04:13:15,835 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 04:13:15,836 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 04:13:15,836 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 04:13:15,836 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 04:13:15,836 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 04:13:15,836 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 04:13:15,836 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 04:13:15,836 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 04:13:15,836 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 04:13:15,836 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 04:13:15,923 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 04:13:15,926 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 04:13:18,436 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 04:13:19,163 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 04:13:19,163 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 04:13:19,167 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:13:19 BoogieIcfgContainer [2023-04-01 04:13:19,167 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 04:13:19,170 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 04:13:19,170 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 04:13:19,173 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 04:13:19,173 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 04:13:14" (1/3) ... [2023-04-01 04:13:19,174 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bd7e7b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:13:19, skipping insertion in model container [2023-04-01 04:13:19,174 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:13:15" (2/3) ... [2023-04-01 04:13:19,174 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bd7e7b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:13:19, skipping insertion in model container [2023-04-01 04:13:19,174 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:13:19" (3/3) ... [2023-04-01 04:13:19,175 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem15_label10.c [2023-04-01 04:13:19,193 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 04:13:19,194 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 04:13:19,257 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 04:13:19,263 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;@79416192, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 04:13:19,264 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 04:13:19,271 INFO L276 IsEmpty]: Start isEmpty. Operand has 244 states, 234 states have (on average 1.9572649572649572) internal successors, (458), 235 states have internal predecessors, (458), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 04:13:19,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 04:13:19,277 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:13:19,278 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:13:19,279 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:13:19,284 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:13:19,284 INFO L85 PathProgramCache]: Analyzing trace with hash 271516867, now seen corresponding path program 1 times [2023-04-01 04:13:19,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:13:19,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319541985] [2023-04-01 04:13:19,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:13:19,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:13:19,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:13:19,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:13:19,651 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:13:19,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319541985] [2023-04-01 04:13:19,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319541985] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:13:19,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:13:19,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 04:13:19,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916954959] [2023-04-01 04:13:19,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:13:19,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:13:19,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:13:19,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:13:19,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:13:19,700 INFO L87 Difference]: Start difference. First operand has 244 states, 234 states have (on average 1.9572649572649572) internal successors, (458), 235 states have internal predecessors, (458), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:13:22,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:13:22,736 INFO L93 Difference]: Finished difference Result 718 states and 1389 transitions. [2023-04-01 04:13:22,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 04:13:22,746 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-04-01 04:13:22,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:13:22,770 INFO L225 Difference]: With dead ends: 718 [2023-04-01 04:13:22,770 INFO L226 Difference]: Without dead ends: 471 [2023-04-01 04:13:22,779 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:13:22,784 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 235 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 739 mSolverCounterSat, 218 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 957 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 218 IncrementalHoareTripleChecker+Valid, 739 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-04-01 04:13:22,785 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [235 Valid, 110 Invalid, 957 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [218 Valid, 739 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2023-04-01 04:13:22,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2023-04-01 04:13:22,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 469. [2023-04-01 04:13:22,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 459 states have (on average 1.7712418300653594) internal successors, (813), 459 states have internal predecessors, (813), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-04-01 04:13:22,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 824 transitions. [2023-04-01 04:13:22,852 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 824 transitions. Word has length 11 [2023-04-01 04:13:22,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:13:22,852 INFO L495 AbstractCegarLoop]: Abstraction has 469 states and 824 transitions. [2023-04-01 04:13:22,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:13:22,853 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 824 transitions. [2023-04-01 04:13:22,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-04-01 04:13:22,854 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:13:22,854 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:13:22,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 04:13:22,855 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:13:22,855 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:13:22,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1643216222, now seen corresponding path program 1 times [2023-04-01 04:13:22,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:13:22,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221663567] [2023-04-01 04:13:22,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:13:22,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:13:22,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:13:23,106 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:13:23,106 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:13:23,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221663567] [2023-04-01 04:13:23,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221663567] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:13:23,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:13:23,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:13:23,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934358693] [2023-04-01 04:13:23,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:13:23,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:13:23,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:13:23,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:13:23,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:13:23,110 INFO L87 Difference]: Start difference. First operand 469 states and 824 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:13:25,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:13:25,582 INFO L93 Difference]: Finished difference Result 1421 states and 2520 transitions. [2023-04-01 04:13:25,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 04:13:25,582 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 23 [2023-04-01 04:13:25,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:13:25,588 INFO L225 Difference]: With dead ends: 1421 [2023-04-01 04:13:25,588 INFO L226 Difference]: Without dead ends: 957 [2023-04-01 04:13:25,589 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-04-01 04:13:25,590 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 746 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1416 mSolverCounterSat, 326 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 746 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 1742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 326 IncrementalHoareTripleChecker+Valid, 1416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-04-01 04:13:25,591 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [746 Valid, 48 Invalid, 1742 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [326 Valid, 1416 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-04-01 04:13:25,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 957 states. [2023-04-01 04:13:25,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 957 to 932. [2023-04-01 04:13:25,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 932 states, 912 states have (on average 1.4923245614035088) internal successors, (1361), 916 states have internal predecessors, (1361), 8 states have call successors, (8), 8 states have call predecessors, (8), 11 states have return successors, (27), 7 states have call predecessors, (27), 7 states have call successors, (27) [2023-04-01 04:13:25,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 932 states to 932 states and 1396 transitions. [2023-04-01 04:13:25,640 INFO L78 Accepts]: Start accepts. Automaton has 932 states and 1396 transitions. Word has length 23 [2023-04-01 04:13:25,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:13:25,641 INFO L495 AbstractCegarLoop]: Abstraction has 932 states and 1396 transitions. [2023-04-01 04:13:25,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:13:25,641 INFO L276 IsEmpty]: Start isEmpty. Operand 932 states and 1396 transitions. [2023-04-01 04:13:25,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-04-01 04:13:25,642 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:13:25,642 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:13:25,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 04:13:25,643 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:13:25,643 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:13:25,643 INFO L85 PathProgramCache]: Analyzing trace with hash 567821186, now seen corresponding path program 1 times [2023-04-01 04:13:25,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:13:25,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093280486] [2023-04-01 04:13:25,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:13:25,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:13:25,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:13:25,791 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:13:25,791 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:13:25,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093280486] [2023-04-01 04:13:25,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093280486] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:13:25,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:13:25,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:13:25,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037345772] [2023-04-01 04:13:25,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:13:25,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:13:25,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:13:25,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:13:25,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:13:25,794 INFO L87 Difference]: Start difference. First operand 932 states and 1396 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:13:28,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:13:28,351 INFO L93 Difference]: Finished difference Result 2838 states and 4328 transitions. [2023-04-01 04:13:28,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 04:13:28,352 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 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 35 [2023-04-01 04:13:28,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:13:28,365 INFO L225 Difference]: With dead ends: 2838 [2023-04-01 04:13:28,366 INFO L226 Difference]: Without dead ends: 1911 [2023-04-01 04:13:28,373 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-04-01 04:13:28,374 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 820 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 1205 mSolverCounterSat, 469 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 820 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 1674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 469 IncrementalHoareTripleChecker+Valid, 1205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-04-01 04:13:28,375 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [820 Valid, 47 Invalid, 1674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [469 Valid, 1205 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-04-01 04:13:28,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1911 states. [2023-04-01 04:13:28,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1911 to 1660. [2023-04-01 04:13:28,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1660 states, 1613 states have (on average 1.3415995040297581) internal successors, (2164), 1634 states have internal predecessors, (2164), 13 states have call successors, (13), 13 states have call predecessors, (13), 33 states have return successors, (74), 12 states have call predecessors, (74), 12 states have call successors, (74) [2023-04-01 04:13:28,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1660 states to 1660 states and 2251 transitions. [2023-04-01 04:13:28,436 INFO L78 Accepts]: Start accepts. Automaton has 1660 states and 2251 transitions. Word has length 35 [2023-04-01 04:13:28,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:13:28,436 INFO L495 AbstractCegarLoop]: Abstraction has 1660 states and 2251 transitions. [2023-04-01 04:13:28,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:13:28,437 INFO L276 IsEmpty]: Start isEmpty. Operand 1660 states and 2251 transitions. [2023-04-01 04:13:28,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2023-04-01 04:13:28,445 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:13:28,446 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:13:28,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 04:13:28,447 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:13:28,448 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:13:28,448 INFO L85 PathProgramCache]: Analyzing trace with hash 943808755, now seen corresponding path program 1 times [2023-04-01 04:13:28,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:13:28,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428578382] [2023-04-01 04:13:28,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:13:28,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:13:28,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:13:29,081 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 04:13:29,081 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:13:29,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428578382] [2023-04-01 04:13:29,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428578382] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:13:29,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620113472] [2023-04-01 04:13:29,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:13:29,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:13:29,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:13:29,089 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 04:13:29,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 04:13:29,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:13:29,218 INFO L262 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-01 04:13:29,225 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:13:29,487 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 04:13:29,487 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:13:30,000 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 04:13:30,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620113472] provided 1 perfect and 1 imperfect interpolant sequences [2023-04-01 04:13:30,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-04-01 04:13:30,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2023-04-01 04:13:30,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006224486] [2023-04-01 04:13:30,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:13:30,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 04:13:30,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:13:30,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 04:13:30,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-01 04:13:30,007 INFO L87 Difference]: Start difference. First operand 1660 states and 2251 transitions. Second operand has 4 states, 4 states have (on average 36.0) internal successors, (144), 3 states have internal predecessors, (144), 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) [2023-04-01 04:13:32,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:13:32,387 INFO L93 Difference]: Finished difference Result 4952 states and 6862 transitions. [2023-04-01 04:13:32,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 04:13:32,388 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.0) internal successors, (144), 3 states have internal predecessors, (144), 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 152 [2023-04-01 04:13:32,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:13:32,410 INFO L225 Difference]: With dead ends: 4952 [2023-04-01 04:13:32,411 INFO L226 Difference]: Without dead ends: 3297 [2023-04-01 04:13:32,417 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 305 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-01 04:13:32,418 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 348 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 1117 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 1280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 1117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-04-01 04:13:32,418 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [348 Valid, 35 Invalid, 1280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 1117 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-04-01 04:13:32,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3297 states. [2023-04-01 04:13:32,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3297 to 2498. [2023-04-01 04:13:32,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2498 states, 2426 states have (on average 1.3573784006595218) internal successors, (3293), 2462 states have internal predecessors, (3293), 18 states have call successors, (18), 18 states have call predecessors, (18), 53 states have return successors, (216), 17 states have call predecessors, (216), 17 states have call successors, (216) [2023-04-01 04:13:32,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2498 states to 2498 states and 3527 transitions. [2023-04-01 04:13:32,518 INFO L78 Accepts]: Start accepts. Automaton has 2498 states and 3527 transitions. Word has length 152 [2023-04-01 04:13:32,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:13:32,520 INFO L495 AbstractCegarLoop]: Abstraction has 2498 states and 3527 transitions. [2023-04-01 04:13:32,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.0) internal successors, (144), 3 states have internal predecessors, (144), 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) [2023-04-01 04:13:32,521 INFO L276 IsEmpty]: Start isEmpty. Operand 2498 states and 3527 transitions. [2023-04-01 04:13:32,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2023-04-01 04:13:32,527 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:13:32,528 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:13:32,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 04:13:32,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:13:32,740 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:13:32,740 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:13:32,740 INFO L85 PathProgramCache]: Analyzing trace with hash 1929151890, now seen corresponding path program 1 times [2023-04-01 04:13:32,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:13:32,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357024590] [2023-04-01 04:13:32,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:13:32,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:13:32,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:13:33,123 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-04-01 04:13:33,124 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:13:33,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357024590] [2023-04-01 04:13:33,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357024590] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:13:33,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:13:33,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 04:13:33,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932613391] [2023-04-01 04:13:33,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:13:33,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:13:33,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:13:33,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:13:33,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:13:33,137 INFO L87 Difference]: Start difference. First operand 2498 states and 3527 transitions. Second operand has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 04:13:34,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:13:34,717 INFO L93 Difference]: Finished difference Result 6154 states and 9040 transitions. [2023-04-01 04:13:34,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 04:13:34,718 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 173 [2023-04-01 04:13:34,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:13:34,738 INFO L225 Difference]: With dead ends: 6154 [2023-04-01 04:13:34,739 INFO L226 Difference]: Without dead ends: 3661 [2023-04-01 04:13:34,748 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:13:34,750 INFO L413 NwaCegarLoop]: 413 mSDtfsCounter, 228 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 723 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 723 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-04-01 04:13:34,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [228 Valid, 429 Invalid, 929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 723 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-04-01 04:13:34,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3661 states. [2023-04-01 04:13:34,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3661 to 3416. [2023-04-01 04:13:34,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3416 states, 3326 states have (on average 1.2934455802766085) internal successors, (4302), 3370 states have internal predecessors, (4302), 23 states have call successors, (23), 23 states have call predecessors, (23), 66 states have return successors, (323), 22 states have call predecessors, (323), 22 states have call successors, (323) [2023-04-01 04:13:34,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3416 states to 3416 states and 4648 transitions. [2023-04-01 04:13:34,900 INFO L78 Accepts]: Start accepts. Automaton has 3416 states and 4648 transitions. Word has length 173 [2023-04-01 04:13:34,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:13:34,901 INFO L495 AbstractCegarLoop]: Abstraction has 3416 states and 4648 transitions. [2023-04-01 04:13:34,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 04:13:34,901 INFO L276 IsEmpty]: Start isEmpty. Operand 3416 states and 4648 transitions. [2023-04-01 04:13:34,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2023-04-01 04:13:34,903 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:13:34,903 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:13:34,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 04:13:34,903 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:13:34,904 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:13:34,904 INFO L85 PathProgramCache]: Analyzing trace with hash -488345814, now seen corresponding path program 1 times [2023-04-01 04:13:34,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:13:34,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889936555] [2023-04-01 04:13:34,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:13:34,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:13:34,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:13:35,253 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 33 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:13:35,254 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:13:35,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889936555] [2023-04-01 04:13:35,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889936555] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:13:35,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906198481] [2023-04-01 04:13:35,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:13:35,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:13:35,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:13:35,256 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 04:13:35,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 04:13:35,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:13:35,391 INFO L262 TraceCheckSpWp]: Trace formula consists of 520 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 04:13:35,398 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:13:35,452 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 33 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:13:35,452 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:13:35,560 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 33 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:13:35,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906198481] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 04:13:35,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1115289769] [2023-04-01 04:13:35,592 INFO L159 IcfgInterpreter]: Started Sifa with 148 locations of interest [2023-04-01 04:13:35,592 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 04:13:35,596 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 04:13:35,600 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 04:13:35,600 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 04:13:35,775 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 51 for LOIs [2023-04-01 04:13:36,131 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 28 [2023-04-01 04:13:39,523 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 55685 conjuctions. This might take some time... [2023-04-01 04:13:46,397 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 1521 conjuctions. [2023-04-01 04:13:57,446 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 33