/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 EqDomain -i ../sv-benchmarks/c/eca-rers2012/Problem13_label44.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 10:09:28,659 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 10:09:28,661 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 10:09:28,704 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 10:09:28,704 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 10:09:28,707 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 10:09:28,711 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 10:09:28,713 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 10:09:28,714 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 10:09:28,719 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 10:09:28,720 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 10:09:28,721 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 10:09:28,722 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 10:09:28,724 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 10:09:28,725 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 10:09:28,726 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 10:09:28,727 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 10:09:28,727 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 10:09:28,729 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 10:09:28,736 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 10:09:28,737 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 10:09:28,738 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 10:09:28,739 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 10:09:28,740 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 10:09:28,745 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 10:09:28,745 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 10:09:28,745 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 10:09:28,746 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 10:09:28,747 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 10:09:28,747 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 10:09:28,748 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 10:09:28,748 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 10:09:28,749 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 10:09:28,750 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 10:09:28,750 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 10:09:28,751 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 10:09:28,751 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 10:09:28,751 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 10:09:28,751 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 10:09:28,752 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 10:09:28,753 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 10:09:28,754 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 10:09:28,785 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 10:09:28,785 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 10:09:28,786 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 10:09:28,786 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 10:09:28,787 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 10:09:28,787 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 10:09:28,787 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 10:09:28,787 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 10:09:28,787 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 10:09:28,787 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 10:09:28,788 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 10:09:28,788 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 10:09:28,788 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 10:09:28,788 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 10:09:28,788 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 10:09:28,788 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 10:09:28,789 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 10:09:28,789 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 10:09:28,789 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 10:09:28,789 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 10:09:28,789 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 10:09:28,790 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 10:09:28,790 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 10:09:28,790 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 10:09:28,790 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 10:09:28,790 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 10:09:28,790 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 10:09:28,791 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 10:09:28,791 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 10:09:28,791 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 10:09:28,791 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 10:09:28,791 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 10:09:28,791 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 10:09:28,792 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 10:09:28,792 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 10:09:28,792 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 10:09:28,792 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 10:09:28,792 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 10:09:28,792 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 10:09:28,792 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 10:09:28,793 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 10:09:28,793 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 10:09:29,017 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 10:09:29,046 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 10:09:29,048 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 10:09:29,049 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 10:09:29,050 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 10:09:29,051 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem13_label44.c [2023-04-01 10:09:30,206 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 10:09:30,651 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 10:09:30,652 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label44.c [2023-04-01 10:09:30,682 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7b91e2d60/15a4b0d048f7465c994d32bcadc37b7c/FLAGaaf728f6d [2023-04-01 10:09:30,698 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7b91e2d60/15a4b0d048f7465c994d32bcadc37b7c [2023-04-01 10:09:30,701 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 10:09:30,703 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 10:09:30,705 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 10:09:30,705 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 10:09:30,709 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 10:09:30,709 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:09:30" (1/1) ... [2023-04-01 10:09:30,711 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d388018 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:09:30, skipping insertion in model container [2023-04-01 10:09:30,711 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:09:30" (1/1) ... [2023-04-01 10:09:30,717 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 10:09:30,839 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 10:09:31,117 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/Problem13_label44.c[4499,4512] [2023-04-01 10:09:31,921 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 10:09:31,933 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 10:09:31,960 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/Problem13_label44.c[4499,4512] [2023-04-01 10:09:32,403 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 10:09:32,424 INFO L208 MainTranslator]: Completed translation [2023-04-01 10:09:32,424 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:09:32 WrapperNode [2023-04-01 10:09:32,425 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 10:09:32,426 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 10:09:32,426 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 10:09:32,426 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 10:09:32,437 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:09:32" (1/1) ... [2023-04-01 10:09:32,437 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:09:32" (1/1) ... [2023-04-01 10:09:32,495 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:09:32" (1/1) ... [2023-04-01 10:09:32,496 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:09:32" (1/1) ... [2023-04-01 10:09:32,614 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:09:32" (1/1) ... [2023-04-01 10:09:32,640 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:09:32" (1/1) ... [2023-04-01 10:09:32,709 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:09:32" (1/1) ... [2023-04-01 10:09:32,725 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:09:32" (1/1) ... [2023-04-01 10:09:32,777 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 10:09:32,778 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 10:09:32,779 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 10:09:32,779 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 10:09:32,780 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:09:32" (1/1) ... [2023-04-01 10:09:32,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 10:09:32,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:09:32,808 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 10:09:32,812 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 10:09:32,840 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 10:09:32,841 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 10:09:32,841 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 10:09:32,841 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 10:09:32,841 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 10:09:32,841 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-04-01 10:09:32,841 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-04-01 10:09:32,841 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 10:09:32,841 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 10:09:32,841 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 10:09:32,841 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-04-01 10:09:32,841 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-04-01 10:09:32,842 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 10:09:32,842 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 10:09:32,842 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 10:09:32,842 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 10:09:32,842 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 10:09:32,842 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 10:09:32,842 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 10:09:32,842 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 10:09:32,842 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 10:09:32,842 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 10:09:32,842 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 10:09:32,843 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 10:09:32,843 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 10:09:32,907 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 10:09:32,909 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 10:09:37,649 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 10:09:40,615 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 10:09:40,615 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 10:09:40,619 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:09:40 BoogieIcfgContainer [2023-04-01 10:09:40,619 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 10:09:40,621 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 10:09:40,621 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 10:09:40,624 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 10:09:40,624 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 10:09:30" (1/3) ... [2023-04-01 10:09:40,625 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a01b682 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:09:40, skipping insertion in model container [2023-04-01 10:09:40,625 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:09:32" (2/3) ... [2023-04-01 10:09:40,625 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a01b682 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:09:40, skipping insertion in model container [2023-04-01 10:09:40,626 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:09:40" (3/3) ... [2023-04-01 10:09:40,630 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem13_label44.c [2023-04-01 10:09:40,652 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 10:09:40,652 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 10:09:40,725 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 10:09:40,729 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;@1e4f2531, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 10:09:40,730 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 10:09:40,736 INFO L276 IsEmpty]: Start isEmpty. Operand has 694 states, 680 states have (on average 1.9764705882352942) internal successors, (1344), 681 states have internal predecessors, (1344), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-01 10:09:40,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 10:09:40,742 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:09:40,742 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:09:40,743 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:09:40,746 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:09:40,747 INFO L85 PathProgramCache]: Analyzing trace with hash -330933964, now seen corresponding path program 1 times [2023-04-01 10:09:40,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:09:40,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643518101] [2023-04-01 10:09:40,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:09:40,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:09:40,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:09:41,186 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 10:09:41,186 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:09:41,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643518101] [2023-04-01 10:09:41,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643518101] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:09:41,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:09:41,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 10:09:41,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718901267] [2023-04-01 10:09:41,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:09:41,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 10:09:41,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:09:41,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 10:09:41,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:09:41,219 INFO L87 Difference]: Start difference. First operand has 694 states, 680 states have (on average 1.9764705882352942) internal successors, (1344), 681 states have internal predecessors, (1344), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) 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 10:09:44,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:09:44,671 INFO L93 Difference]: Finished difference Result 2068 states and 4065 transitions. [2023-04-01 10:09:44,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 10:09:44,675 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 10:09:44,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:09:44,695 INFO L225 Difference]: With dead ends: 2068 [2023-04-01 10:09:44,695 INFO L226 Difference]: Without dead ends: 1371 [2023-04-01 10:09:44,701 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 10:09:44,704 INFO L413 NwaCegarLoop]: 280 mSDtfsCounter, 831 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 2080 mSolverCounterSat, 650 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 831 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 2730 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 650 IncrementalHoareTripleChecker+Valid, 2080 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2023-04-01 10:09:44,705 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [831 Valid, 305 Invalid, 2730 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [650 Valid, 2080 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2023-04-01 10:09:44,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1371 states. [2023-04-01 10:09:44,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1371 to 1369. [2023-04-01 10:09:44,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1369 states, 1351 states have (on average 1.7535159141376757) internal successors, (2369), 1351 states have internal predecessors, (2369), 9 states have call successors, (9), 9 states have call predecessors, (9), 8 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2023-04-01 10:09:44,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1369 states to 1369 states and 2392 transitions. [2023-04-01 10:09:44,819 INFO L78 Accepts]: Start accepts. Automaton has 1369 states and 2392 transitions. Word has length 11 [2023-04-01 10:09:44,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:09:44,820 INFO L495 AbstractCegarLoop]: Abstraction has 1369 states and 2392 transitions. [2023-04-01 10:09:44,820 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 10:09:44,820 INFO L276 IsEmpty]: Start isEmpty. Operand 1369 states and 2392 transitions. [2023-04-01 10:09:44,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-04-01 10:09:44,821 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:09:44,822 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] [2023-04-01 10:09:44,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 10:09:44,822 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:09:44,823 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:09:44,823 INFO L85 PathProgramCache]: Analyzing trace with hash 1751399801, now seen corresponding path program 1 times [2023-04-01 10:09:44,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:09:44,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468850011] [2023-04-01 10:09:44,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:09:44,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:09:44,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:09:45,063 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 10:09:45,063 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:09:45,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468850011] [2023-04-01 10:09:45,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468850011] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:09:45,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:09:45,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 10:09:45,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087733613] [2023-04-01 10:09:45,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:09:45,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:09:45,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:09:45,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:09:45,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 10:09:45,067 INFO L87 Difference]: Start difference. First operand 1369 states and 2392 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 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 10:09:50,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:09:50,290 INFO L93 Difference]: Finished difference Result 4183 states and 7346 transitions. [2023-04-01 10:09:50,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 10:09:50,291 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 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 27 [2023-04-01 10:09:50,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:09:50,307 INFO L225 Difference]: With dead ends: 4183 [2023-04-01 10:09:50,308 INFO L226 Difference]: Without dead ends: 2819 [2023-04-01 10:09:50,320 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 10:09:50,323 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 2235 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 4325 mSolverCounterSat, 1090 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2235 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 5415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1090 IncrementalHoareTripleChecker+Valid, 4325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2023-04-01 10:09:50,328 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2235 Valid, 140 Invalid, 5415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1090 Valid, 4325 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2023-04-01 10:09:50,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2819 states. [2023-04-01 10:09:50,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2819 to 2751. [2023-04-01 10:09:50,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2751 states, 2708 states have (on average 1.5535450516986706) internal successors, (4207), 2713 states have internal predecessors, (4207), 15 states have call successors, (15), 15 states have call predecessors, (15), 27 states have return successors, (75), 22 states have call predecessors, (75), 14 states have call successors, (75) [2023-04-01 10:09:50,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2751 states to 2751 states and 4297 transitions. [2023-04-01 10:09:50,450 INFO L78 Accepts]: Start accepts. Automaton has 2751 states and 4297 transitions. Word has length 27 [2023-04-01 10:09:50,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:09:50,450 INFO L495 AbstractCegarLoop]: Abstraction has 2751 states and 4297 transitions. [2023-04-01 10:09:50,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 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 10:09:50,451 INFO L276 IsEmpty]: Start isEmpty. Operand 2751 states and 4297 transitions. [2023-04-01 10:09:50,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-04-01 10:09:50,452 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:09:50,453 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] [2023-04-01 10:09:50,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 10:09:50,454 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:09:50,454 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:09:50,454 INFO L85 PathProgramCache]: Analyzing trace with hash 1046537181, now seen corresponding path program 1 times [2023-04-01 10:09:50,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:09:50,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795312381] [2023-04-01 10:09:50,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:09:50,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:09:50,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:09:50,709 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 10:09:50,710 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:09:50,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795312381] [2023-04-01 10:09:50,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795312381] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:09:50,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:09:50,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 10:09:50,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388506050] [2023-04-01 10:09:50,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:09:50,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:09:50,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:09:50,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:09:50,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 10:09:50,714 INFO L87 Difference]: Start difference. First operand 2751 states and 4297 transitions. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 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 10:09:55,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:09:55,497 INFO L93 Difference]: Finished difference Result 8433 states and 13565 transitions. [2023-04-01 10:09:55,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 10:09:55,502 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 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 41 [2023-04-01 10:09:55,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:09:55,539 INFO L225 Difference]: With dead ends: 8433 [2023-04-01 10:09:55,539 INFO L226 Difference]: Without dead ends: 5687 [2023-04-01 10:09:55,550 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 10:09:55,554 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 2123 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 5253 mSolverCounterSat, 855 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2123 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 6108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 855 IncrementalHoareTripleChecker+Valid, 5253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2023-04-01 10:09:55,556 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2123 Valid, 118 Invalid, 6108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [855 Valid, 5253 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2023-04-01 10:09:55,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5687 states. [2023-04-01 10:09:55,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5687 to 5570. [2023-04-01 10:09:55,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5570 states, 5445 states have (on average 1.507070707070707) internal successors, (8206), 5471 states have internal predecessors, (8206), 27 states have call successors, (27), 27 states have call predecessors, (27), 97 states have return successors, (413), 71 states have call predecessors, (413), 26 states have call successors, (413) [2023-04-01 10:09:55,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5570 states to 5570 states and 8646 transitions. [2023-04-01 10:09:55,732 INFO L78 Accepts]: Start accepts. Automaton has 5570 states and 8646 transitions. Word has length 41 [2023-04-01 10:09:55,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:09:55,733 INFO L495 AbstractCegarLoop]: Abstraction has 5570 states and 8646 transitions. [2023-04-01 10:09:55,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 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 10:09:55,734 INFO L276 IsEmpty]: Start isEmpty. Operand 5570 states and 8646 transitions. [2023-04-01 10:09:55,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-04-01 10:09:55,742 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:09:55,742 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:09:55,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 10:09:55,743 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:09:55,745 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:09:55,746 INFO L85 PathProgramCache]: Analyzing trace with hash -1556920300, now seen corresponding path program 1 times [2023-04-01 10:09:55,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:09:55,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636542767] [2023-04-01 10:09:55,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:09:55,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:09:55,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:09:55,928 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 10:09:55,928 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:09:55,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636542767] [2023-04-01 10:09:55,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636542767] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 10:09:55,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861419093] [2023-04-01 10:09:55,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:09:55,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:09:55,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:09:55,935 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 10:09:55,957 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 10:09:56,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:09:56,146 INFO L262 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 10:09:56,151 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 10:09:56,270 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 10:09:56,271 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 10:09:56,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861419093] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:09:56,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 10:09:56,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-04-01 10:09:56,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938997641] [2023-04-01 10:09:56,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:09:56,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:09:56,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:09:56,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:09:56,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-01 10:09:56,273 INFO L87 Difference]: Start difference. First operand 5570 states and 8646 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 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 10:10:00,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:10:00,192 INFO L93 Difference]: Finished difference Result 16768 states and 27168 transitions. [2023-04-01 10:10:00,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 10:10:00,193 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 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 42 [2023-04-01 10:10:00,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:10:00,248 INFO L225 Difference]: With dead ends: 16768 [2023-04-01 10:10:00,249 INFO L226 Difference]: Without dead ends: 11203 [2023-04-01 10:10:00,268 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-04-01 10:10:00,273 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 2428 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 3486 mSolverCounterSat, 1263 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2428 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 4749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1263 IncrementalHoareTripleChecker+Valid, 3486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2023-04-01 10:10:00,274 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2428 Valid, 73 Invalid, 4749 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1263 Valid, 3486 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2023-04-01 10:10:00,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11203 states. [2023-04-01 10:10:00,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11203 to 9828. [2023-04-01 10:10:00,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9828 states, 9570 states have (on average 1.3699059561128526) internal successors, (13110), 9636 states have internal predecessors, (13110), 46 states have call successors, (46), 46 states have call predecessors, (46), 211 states have return successors, (1273), 145 states have call predecessors, (1273), 45 states have call successors, (1273) [2023-04-01 10:10:00,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9828 states to 9828 states and 14429 transitions. [2023-04-01 10:10:00,552 INFO L78 Accepts]: Start accepts. Automaton has 9828 states and 14429 transitions. Word has length 42 [2023-04-01 10:10:00,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:10:00,552 INFO L495 AbstractCegarLoop]: Abstraction has 9828 states and 14429 transitions. [2023-04-01 10:10:00,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 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 10:10:00,553 INFO L276 IsEmpty]: Start isEmpty. Operand 9828 states and 14429 transitions. [2023-04-01 10:10:00,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-04-01 10:10:00,554 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:10:00,554 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:10:00,563 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-01 10:10:00,760 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 10:10:00,760 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:10:00,761 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:10:00,761 INFO L85 PathProgramCache]: Analyzing trace with hash 106749434, now seen corresponding path program 1 times [2023-04-01 10:10:00,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:10:00,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661558679] [2023-04-01 10:10:00,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:10:00,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:10:00,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:10:00,994 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 10:10:00,995 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:10:00,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661558679] [2023-04-01 10:10:00,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661558679] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 10:10:00,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205498166] [2023-04-01 10:10:01,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:10:01,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:10:01,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:10:01,002 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 10:10:01,005 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 10:10:01,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:10:01,111 INFO L262 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 10:10:01,114 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 10:10:01,185 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 10:10:01,185 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 10:10:01,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205498166] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:10:01,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 10:10:01,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-04-01 10:10:01,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986867062] [2023-04-01 10:10:01,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:10:01,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:10:01,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:10:01,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:10:01,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-01 10:10:01,188 INFO L87 Difference]: Start difference. First operand 9828 states and 14429 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 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 10:10:05,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:10:05,608 INFO L93 Difference]: Finished difference Result 24770 states and 37331 transitions. [2023-04-01 10:10:05,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 10:10:05,609 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 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 45 [2023-04-01 10:10:05,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:10:05,685 INFO L225 Difference]: With dead ends: 24770 [2023-04-01 10:10:05,685 INFO L226 Difference]: Without dead ends: 14947 [2023-04-01 10:10:05,711 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 44 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 10:10:05,713 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 2041 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 4473 mSolverCounterSat, 971 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2041 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 5444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 971 IncrementalHoareTripleChecker+Valid, 4473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2023-04-01 10:10:05,713 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2041 Valid, 104 Invalid, 5444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [971 Valid, 4473 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2023-04-01 10:10:05,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14947 states. [2023-04-01 10:10:05,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14947 to 14596. [2023-04-01 10:10:06,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14596 states, 14151 states have (on average 1.281746873012508) internal successors, (18138), 14277 states have internal predecessors, (18138), 67 states have call successors, (67), 67 states have call predecessors, (67), 377 states have return successors, (2680), 251 states have call predecessors, (2680), 66 states have call successors, (2680) [2023-04-01 10:10:06,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14596 states to 14596 states and 20885 transitions. [2023-04-01 10:10:06,063 INFO L78 Accepts]: Start accepts. Automaton has 14596 states and 20885 transitions. Word has length 45 [2023-04-01 10:10:06,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:10:06,064 INFO L495 AbstractCegarLoop]: Abstraction has 14596 states and 20885 transitions. [2023-04-01 10:10:06,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 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 10:10:06,065 INFO L276 IsEmpty]: Start isEmpty. Operand 14596 states and 20885 transitions. [2023-04-01 10:10:06,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-04-01 10:10:06,067 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:10:06,068 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-04-01 10:10:06,077 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 10:10:06,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:10:06,277 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:10:06,278 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:10:06,278 INFO L85 PathProgramCache]: Analyzing trace with hash -648513189, now seen corresponding path program 1 times [2023-04-01 10:10:06,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:10:06,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679560881] [2023-04-01 10:10:06,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:10:06,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:10:06,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:10:06,947 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-04-01 10:10:06,947 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:10:06,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679560881] [2023-04-01 10:10:06,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679560881] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 10:10:06,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876056162] [2023-04-01 10:10:06,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:10:06,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:10:06,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:10:06,949 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 10:10:06,977 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 10:10:07,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:10:07,089 INFO L262 TraceCheckSpWp]: Trace formula consists of 566 conjuncts, 16 conjunts are in the unsatisfiable core [2023-04-01 10:10:07,096 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 10:10:07,315 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-04-01 10:10:07,316 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 10:10:07,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876056162] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:10:07,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 10:10:07,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-04-01 10:10:07,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336685534] [2023-04-01 10:10:07,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:10:07,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:10:07,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:10:07,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:10:07,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-04-01 10:10:07,318 INFO L87 Difference]: Start difference. First operand 14596 states and 20885 transitions. Second operand has 5 states, 5 states have (on average 10.4) internal successors, (52), 4 states have internal predecessors, (52), 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 10:10:11,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:10:11,714 INFO L93 Difference]: Finished difference Result 30455 states and 44084 transitions. [2023-04-01 10:10:11,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 10:10:11,715 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 4 states have internal predecessors, (52), 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 79 [2023-04-01 10:10:11,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:10:11,776 INFO L225 Difference]: With dead ends: 30455 [2023-04-01 10:10:11,776 INFO L226 Difference]: Without dead ends: 15864 [2023-04-01 10:10:11,811 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2023-04-01 10:10:11,812 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 1971 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 4369 mSolverCounterSat, 321 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1971 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 4690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 321 IncrementalHoareTripleChecker+Valid, 4369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2023-04-01 10:10:11,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1971 Valid, 106 Invalid, 4690 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [321 Valid, 4369 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2023-04-01 10:10:11,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15864 states. [2023-04-01 10:10:12,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15864 to 15616. [2023-04-01 10:10:12,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15616 states, 15021 states have (on average 1.2656946940949338) internal successors, (19012), 15217 states have internal predecessors, (19012), 70 states have call successors, (70), 70 states have call predecessors, (70), 524 states have return successors, (3290), 328 states have call predecessors, (3290), 69 states have call successors, (3290) [2023-04-01 10:10:12,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15616 states to 15616 states and 22372 transitions. [2023-04-01 10:10:12,184 INFO L78 Accepts]: Start accepts. Automaton has 15616 states and 22372 transitions. Word has length 79 [2023-04-01 10:10:12,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:10:12,184 INFO L495 AbstractCegarLoop]: Abstraction has 15616 states and 22372 transitions. [2023-04-01 10:10:12,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 4 states have internal predecessors, (52), 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 10:10:12,185 INFO L276 IsEmpty]: Start isEmpty. Operand 15616 states and 22372 transitions. [2023-04-01 10:10:12,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-04-01 10:10:12,186 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:10:12,187 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-04-01 10:10:12,196 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 10:10:12,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:10:12,392 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:10:12,393 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:10:12,393 INFO L85 PathProgramCache]: Analyzing trace with hash -22145457, now seen corresponding path program 1 times [2023-04-01 10:10:12,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:10:12,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555481306] [2023-04-01 10:10:12,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:10:12,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:10:12,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:10:12,591 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 35 proven. 16 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-04-01 10:10:12,591 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:10:12,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555481306] [2023-04-01 10:10:12,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555481306] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 10:10:12,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486056887] [2023-04-01 10:10:12,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:10:12,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:10:12,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:10:12,593 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 10:10:12,596 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 10:10:12,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:10:12,715 INFO L262 TraceCheckSpWp]: Trace formula consists of 575 conjuncts, 9 conjunts are in the unsatisfiable core [2023-04-01 10:10:12,725 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 10:10:12,847 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 45 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-04-01 10:10:12,847 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 10:10:13,143 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 23 proven. 38 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 10:10:13,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486056887] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 10:10:13,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [951226764] [2023-04-01 10:10:13,209 INFO L159 IcfgInterpreter]: Started Sifa with 48 locations of interest [2023-04-01 10:10:13,209 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 10:10:13,213 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 10:10:13,217 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 10:10:13,218 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 10:10:13,504 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 81 for LOIs [2023-04-01 10:10:13,770 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 24