/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/Problem01_label20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 03:11:25,688 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 03:11:25,691 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 03:11:25,731 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 03:11:25,731 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 03:11:25,734 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 03:11:25,737 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 03:11:25,739 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 03:11:25,741 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 03:11:25,746 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 03:11:25,747 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 03:11:25,749 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 03:11:25,749 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 03:11:25,751 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 03:11:25,752 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 03:11:25,753 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 03:11:25,754 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 03:11:25,755 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 03:11:25,757 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 03:11:25,761 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 03:11:25,762 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 03:11:25,763 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 03:11:25,769 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 03:11:25,770 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 03:11:25,778 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 03:11:25,779 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 03:11:25,779 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 03:11:25,780 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 03:11:25,781 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 03:11:25,781 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 03:11:25,781 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 03:11:25,782 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 03:11:25,783 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 03:11:25,784 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 03:11:25,785 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 03:11:25,785 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 03:11:25,785 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 03:11:25,785 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 03:11:25,786 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 03:11:25,786 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 03:11:25,787 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 03:11:25,788 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 03:11:25,819 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 03:11:25,819 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 03:11:25,820 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 03:11:25,820 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 03:11:25,821 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 03:11:25,821 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 03:11:25,821 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 03:11:25,821 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 03:11:25,821 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 03:11:25,821 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 03:11:25,822 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 03:11:25,822 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 03:11:25,823 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 03:11:25,823 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 03:11:25,823 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 03:11:25,823 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 03:11:25,823 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 03:11:25,823 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 03:11:25,824 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 03:11:25,824 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 03:11:25,824 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 03:11:25,824 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 03:11:25,824 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 03:11:25,824 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 03:11:25,824 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 03:11:25,825 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 03:11:25,825 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 03:11:25,825 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 03:11:25,825 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 03:11:25,826 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 03:11:25,826 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 03:11:25,826 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 03:11:25,826 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 03:11:25,826 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 03:11:25,826 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 03:11:25,826 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 03:11:25,827 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 03:11:25,827 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 03:11:25,827 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 03:11:25,827 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 03:11:25,827 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 03:11:25,827 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 03:11:26,070 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 03:11:26,089 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 03:11:26,092 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 03:11:26,093 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 03:11:26,093 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 03:11:26,094 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem01_label20.c [2023-04-01 03:11:27,317 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 03:11:27,600 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 03:11:27,601 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem01_label20.c [2023-04-01 03:11:27,611 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/584b25345/bdf08771c7884c7d91f7f1b137d6f7bc/FLAGd947a8093 [2023-04-01 03:11:27,624 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/584b25345/bdf08771c7884c7d91f7f1b137d6f7bc [2023-04-01 03:11:27,627 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 03:11:27,629 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 03:11:27,630 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 03:11:27,630 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 03:11:27,633 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 03:11:27,634 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 03:11:27" (1/1) ... [2023-04-01 03:11:27,635 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2fb4d625 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:11:27, skipping insertion in model container [2023-04-01 03:11:27,635 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 03:11:27" (1/1) ... [2023-04-01 03:11:27,644 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 03:11:27,698 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 03:11:27,924 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/Problem01_label20.c[14503,14516] [2023-04-01 03:11:27,975 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 03:11:27,987 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 03:11:28,067 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/Problem01_label20.c[14503,14516] [2023-04-01 03:11:28,093 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 03:11:28,108 INFO L208 MainTranslator]: Completed translation [2023-04-01 03:11:28,108 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:11:28 WrapperNode [2023-04-01 03:11:28,109 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 03:11:28,110 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 03:11:28,110 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 03:11:28,110 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 03:11:28,121 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:11:28" (1/1) ... [2023-04-01 03:11:28,122 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:11:28" (1/1) ... [2023-04-01 03:11:28,138 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:11:28" (1/1) ... [2023-04-01 03:11:28,138 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:11:28" (1/1) ... [2023-04-01 03:11:28,184 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:11:28" (1/1) ... [2023-04-01 03:11:28,191 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:11:28" (1/1) ... [2023-04-01 03:11:28,196 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:11:28" (1/1) ... [2023-04-01 03:11:28,201 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:11:28" (1/1) ... [2023-04-01 03:11:28,207 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 03:11:28,209 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 03:11:28,209 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 03:11:28,209 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 03:11:28,210 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:11:28" (1/1) ... [2023-04-01 03:11:28,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 03:11:28,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:11:28,243 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 03:11:28,282 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 03:11:28,313 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 03:11:28,313 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 03:11:28,313 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 03:11:28,313 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 03:11:28,313 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 03:11:28,314 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 03:11:28,314 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 03:11:28,314 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 03:11:28,314 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 03:11:28,314 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 03:11:28,314 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 03:11:28,314 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 03:11:28,314 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 03:11:28,315 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 03:11:28,315 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 03:11:28,315 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 03:11:28,315 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 03:11:28,315 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 03:11:28,315 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 03:11:28,384 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 03:11:28,386 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 03:11:29,393 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 03:11:29,628 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 03:11:29,629 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 03:11:29,632 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 03:11:29 BoogieIcfgContainer [2023-04-01 03:11:29,632 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 03:11:29,636 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 03:11:29,636 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 03:11:29,639 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 03:11:29,639 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 03:11:27" (1/3) ... [2023-04-01 03:11:29,640 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76e5adfa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 03:11:29, skipping insertion in model container [2023-04-01 03:11:29,640 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:11:28" (2/3) ... [2023-04-01 03:11:29,640 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76e5adfa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 03:11:29, skipping insertion in model container [2023-04-01 03:11:29,640 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 03:11:29" (3/3) ... [2023-04-01 03:11:29,641 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem01_label20.c [2023-04-01 03:11:29,659 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 03:11:29,659 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 03:11:29,727 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 03:11:29,737 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;@76cc5071, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 03:11:29,737 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 03:11:29,742 INFO L276 IsEmpty]: Start isEmpty. Operand has 86 states, 78 states have (on average 1.8974358974358974) internal successors, (148), 79 states have internal predecessors, (148), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 03:11:29,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-04-01 03:11:29,754 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:11:29,755 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] [2023-04-01 03:11:29,756 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:11:29,763 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:11:29,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1123350936, now seen corresponding path program 1 times [2023-04-01 03:11:29,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:11:29,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756384698] [2023-04-01 03:11:29,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:11:29,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:11:29,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:11:30,466 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 03:11:30,467 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:11:30,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756384698] [2023-04-01 03:11:30,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756384698] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 03:11:30,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 03:11:30,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 03:11:30,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923208401] [2023-04-01 03:11:30,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 03:11:30,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 03:11:30,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:11:30,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 03:11:30,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 03:11:30,524 INFO L87 Difference]: Start difference. First operand has 86 states, 78 states have (on average 1.8974358974358974) internal successors, (148), 79 states have internal predecessors, (148), 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 24.333333333333332) internal successors, (73), 2 states have internal predecessors, (73), 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 03:11:31,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:11:31,007 INFO L93 Difference]: Finished difference Result 246 states and 454 transitions. [2023-04-01 03:11:31,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 03:11:31,010 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 2 states have internal predecessors, (73), 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 77 [2023-04-01 03:11:31,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:11:31,026 INFO L225 Difference]: With dead ends: 246 [2023-04-01 03:11:31,026 INFO L226 Difference]: Without dead ends: 157 [2023-04-01 03:11:31,030 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 03:11:31,035 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 38 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 03:11:31,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 30 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 03:11:31,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2023-04-01 03:11:31,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2023-04-01 03:11:31,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 149 states have (on average 1.8926174496644295) internal successors, (282), 149 states have internal predecessors, (282), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-04-01 03:11:31,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 291 transitions. [2023-04-01 03:11:31,094 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 291 transitions. Word has length 77 [2023-04-01 03:11:31,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:11:31,095 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 291 transitions. [2023-04-01 03:11:31,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 2 states have internal predecessors, (73), 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 03:11:31,096 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 291 transitions. [2023-04-01 03:11:31,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-04-01 03:11:31,105 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:11:31,105 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-01 03:11:31,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 03:11:31,106 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:11:31,106 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:11:31,107 INFO L85 PathProgramCache]: Analyzing trace with hash -1609376742, now seen corresponding path program 1 times [2023-04-01 03:11:31,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:11:31,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612956576] [2023-04-01 03:11:31,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:11:31,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:11:31,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:11:31,574 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:11:31,574 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:11:31,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612956576] [2023-04-01 03:11:31,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612956576] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 03:11:31,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 03:11:31,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 03:11:31,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492093292] [2023-04-01 03:11:31,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 03:11:31,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 03:11:31,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:11:31,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 03:11:31,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 03:11:31,579 INFO L87 Difference]: Start difference. First operand 157 states and 291 transitions. Second operand has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 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 03:11:32,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:11:32,096 INFO L93 Difference]: Finished difference Result 477 states and 896 transitions. [2023-04-01 03:11:32,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 03:11:32,097 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 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 94 [2023-04-01 03:11:32,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:11:32,104 INFO L225 Difference]: With dead ends: 477 [2023-04-01 03:11:32,104 INFO L226 Difference]: Without dead ends: 325 [2023-04-01 03:11:32,112 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 03:11:32,115 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 251 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 03:11:32,115 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [251 Valid, 49 Invalid, 521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 387 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 03:11:32,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2023-04-01 03:11:32,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 317. [2023-04-01 03:11:32,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 300 states have (on average 1.6033333333333333) internal successors, (481), 305 states have internal predecessors, (481), 6 states have call successors, (6), 6 states have call predecessors, (6), 10 states have return successors, (20), 5 states have call predecessors, (20), 5 states have call successors, (20) [2023-04-01 03:11:32,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 507 transitions. [2023-04-01 03:11:32,161 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 507 transitions. Word has length 94 [2023-04-01 03:11:32,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:11:32,166 INFO L495 AbstractCegarLoop]: Abstraction has 317 states and 507 transitions. [2023-04-01 03:11:32,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 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 03:11:32,166 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 507 transitions. [2023-04-01 03:11:32,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2023-04-01 03:11:32,170 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:11:32,170 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-04-01 03:11:32,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 03:11:32,171 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:11:32,171 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:11:32,171 INFO L85 PathProgramCache]: Analyzing trace with hash -689308720, now seen corresponding path program 1 times [2023-04-01 03:11:32,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:11:32,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911042156] [2023-04-01 03:11:32,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:11:32,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:11:32,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:11:32,519 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 24 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 03:11:32,519 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:11:32,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911042156] [2023-04-01 03:11:32,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911042156] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 03:11:32,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048366369] [2023-04-01 03:11:32,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:11:32,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:11:32,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:11:32,528 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 03:11:32,530 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 03:11:32,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:11:32,671 INFO L262 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 03:11:32,680 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:11:32,770 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-01 03:11:32,770 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 03:11:32,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048366369] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 03:11:32,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 03:11:32,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-04-01 03:11:32,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34977598] [2023-04-01 03:11:32,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 03:11:32,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 03:11:32,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:11:32,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 03:11:32,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-01 03:11:32,773 INFO L87 Difference]: Start difference. First operand 317 states and 507 transitions. Second operand has 5 states, 5 states have (on average 17.2) internal successors, (86), 4 states have internal predecessors, (86), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 03:11:33,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:11:33,228 INFO L93 Difference]: Finished difference Result 811 states and 1363 transitions. [2023-04-01 03:11:33,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 03:11:33,229 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 4 states have internal predecessors, (86), 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 107 [2023-04-01 03:11:33,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:11:33,235 INFO L225 Difference]: With dead ends: 811 [2023-04-01 03:11:33,236 INFO L226 Difference]: Without dead ends: 499 [2023-04-01 03:11:33,238 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-04-01 03:11:33,240 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 235 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 494 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 03:11:33,242 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [235 Valid, 37 Invalid, 614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 494 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 03:11:33,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2023-04-01 03:11:33,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 475. [2023-04-01 03:11:33,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 475 states, 450 states have (on average 1.548888888888889) internal successors, (697), 459 states have internal predecessors, (697), 8 states have call successors, (8), 8 states have call predecessors, (8), 16 states have return successors, (44), 7 states have call predecessors, (44), 7 states have call successors, (44) [2023-04-01 03:11:33,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 749 transitions. [2023-04-01 03:11:33,288 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 749 transitions. Word has length 107 [2023-04-01 03:11:33,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:11:33,290 INFO L495 AbstractCegarLoop]: Abstraction has 475 states and 749 transitions. [2023-04-01 03:11:33,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 4 states have internal predecessors, (86), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 03:11:33,290 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 749 transitions. [2023-04-01 03:11:33,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2023-04-01 03:11:33,303 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:11:33,304 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-04-01 03:11:33,314 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 03:11:33,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:11:33,513 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:11:33,514 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:11:33,514 INFO L85 PathProgramCache]: Analyzing trace with hash 134385372, now seen corresponding path program 1 times [2023-04-01 03:11:33,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:11:33,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374782915] [2023-04-01 03:11:33,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:11:33,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:11:33,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:11:33,937 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 30 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 03:11:33,937 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:11:33,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374782915] [2023-04-01 03:11:33,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374782915] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 03:11:33,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293837655] [2023-04-01 03:11:33,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:11:33,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:11:33,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:11:33,941 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 03:11:33,963 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 03:11:34,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:11:34,065 INFO L262 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 03:11:34,069 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:11:34,183 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-04-01 03:11:34,184 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 03:11:34,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293837655] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 03:11:34,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 03:11:34,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-04-01 03:11:34,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460778853] [2023-04-01 03:11:34,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 03:11:34,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 03:11:34,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:11:34,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 03:11:34,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-01 03:11:34,186 INFO L87 Difference]: Start difference. First operand 475 states and 749 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 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 03:11:34,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:11:34,476 INFO L93 Difference]: Finished difference Result 1336 states and 2181 transitions. [2023-04-01 03:11:34,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 03:11:34,477 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 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 113 [2023-04-01 03:11:34,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:11:34,483 INFO L225 Difference]: With dead ends: 1336 [2023-04-01 03:11:34,483 INFO L226 Difference]: Without dead ends: 866 [2023-04-01 03:11:34,484 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-01 03:11:34,485 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 27 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 03:11:34,486 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 40 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 03:11:34,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 866 states. [2023-04-01 03:11:34,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 866 to 789. [2023-04-01 03:11:34,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 789 states, 749 states have (on average 1.506008010680908) internal successors, (1128), 765 states have internal predecessors, (1128), 12 states have call successors, (12), 12 states have call predecessors, (12), 27 states have return successors, (92), 11 states have call predecessors, (92), 11 states have call successors, (92) [2023-04-01 03:11:34,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 789 states to 789 states and 1232 transitions. [2023-04-01 03:11:34,518 INFO L78 Accepts]: Start accepts. Automaton has 789 states and 1232 transitions. Word has length 113 [2023-04-01 03:11:34,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:11:34,519 INFO L495 AbstractCegarLoop]: Abstraction has 789 states and 1232 transitions. [2023-04-01 03:11:34,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 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 03:11:34,519 INFO L276 IsEmpty]: Start isEmpty. Operand 789 states and 1232 transitions. [2023-04-01 03:11:34,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2023-04-01 03:11:34,522 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:11:34,522 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-04-01 03:11:34,530 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 03:11:34,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-04-01 03:11:34,731 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:11:34,731 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:11:34,731 INFO L85 PathProgramCache]: Analyzing trace with hash -1722290688, now seen corresponding path program 1 times [2023-04-01 03:11:34,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:11:34,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737560913] [2023-04-01 03:11:34,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:11:34,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:11:34,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:11:35,205 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 47 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 03:11:35,205 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:11:35,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737560913] [2023-04-01 03:11:35,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737560913] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 03:11:35,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814809885] [2023-04-01 03:11:35,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:11:35,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:11:35,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:11:35,209 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 03:11:35,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 03:11:35,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:11:35,338 INFO L262 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 03:11:35,342 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:11:35,438 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-01 03:11:35,439 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 03:11:35,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814809885] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 03:11:35,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 03:11:35,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-04-01 03:11:35,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314068061] [2023-04-01 03:11:35,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 03:11:35,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 03:11:35,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:11:35,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 03:11:35,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-01 03:11:35,441 INFO L87 Difference]: Start difference. First operand 789 states and 1232 transitions. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 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 03:11:35,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:11:35,693 INFO L93 Difference]: Finished difference Result 1962 states and 3145 transitions. [2023-04-01 03:11:35,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 03:11:35,695 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 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 130 [2023-04-01 03:11:35,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:11:35,701 INFO L225 Difference]: With dead ends: 1962 [2023-04-01 03:11:35,701 INFO L226 Difference]: Without dead ends: 1178 [2023-04-01 03:11:35,703 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-01 03:11:35,704 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 15 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 03:11:35,704 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 34 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 03:11:35,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1178 states. [2023-04-01 03:11:35,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1178 to 1101. [2023-04-01 03:11:35,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1101 states, 1047 states have (on average 1.4479465138490926) internal successors, (1516), 1069 states have internal predecessors, (1516), 16 states have call successors, (16), 16 states have call predecessors, (16), 37 states have return successors, (159), 15 states have call predecessors, (159), 15 states have call successors, (159) [2023-04-01 03:11:35,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1101 states to 1101 states and 1691 transitions. [2023-04-01 03:11:35,746 INFO L78 Accepts]: Start accepts. Automaton has 1101 states and 1691 transitions. Word has length 130 [2023-04-01 03:11:35,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:11:35,747 INFO L495 AbstractCegarLoop]: Abstraction has 1101 states and 1691 transitions. [2023-04-01 03:11:35,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 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 03:11:35,747 INFO L276 IsEmpty]: Start isEmpty. Operand 1101 states and 1691 transitions. [2023-04-01 03:11:35,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2023-04-01 03:11:35,751 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:11:35,751 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 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] [2023-04-01 03:11:35,760 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 03:11:35,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:11:35,960 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:11:35,960 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:11:35,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1404854706, now seen corresponding path program 1 times [2023-04-01 03:11:35,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:11:35,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630593768] [2023-04-01 03:11:35,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:11:35,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:11:35,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:11:36,140 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 79 proven. 19 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-01 03:11:36,141 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:11:36,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630593768] [2023-04-01 03:11:36,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630593768] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 03:11:36,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70878689] [2023-04-01 03:11:36,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:11:36,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:11:36,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:11:36,143 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 03:11:36,170 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 03:11:36,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:11:36,298 INFO L262 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 03:11:36,302 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:11:36,360 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 62 proven. 2 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2023-04-01 03:11:36,361 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 03:11:36,474 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 79 proven. 19 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-01 03:11:36,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70878689] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 03:11:36,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1522857839] [2023-04-01 03:11:36,496 INFO L159 IcfgInterpreter]: Started Sifa with 81 locations of interest [2023-04-01 03:11:36,496 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 03:11:36,500 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 03:11:36,504 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 03:11:36,504 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 03:11:36,796 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 72 for LOIs [2023-04-01 03:12:00,191 WARN L223 SmtUtils]: Spent 19.95s on a formula simplification that was a NOOP. DAG size: 1347 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2023-04-01 03:12:31,208 WARN L223 SmtUtils]: Spent 18.91s on a formula simplification that was a NOOP. DAG size: 1347 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm)