/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/Problem19_label14.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 04:30:25,477 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 04:30:25,479 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 04:30:25,516 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 04:30:25,517 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 04:30:25,519 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 04:30:25,525 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 04:30:25,527 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 04:30:25,533 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 04:30:25,538 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 04:30:25,539 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 04:30:25,541 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 04:30:25,541 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 04:30:25,543 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 04:30:25,545 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 04:30:25,546 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 04:30:25,546 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 04:30:25,547 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 04:30:25,549 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 04:30:25,553 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 04:30:25,554 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 04:30:25,555 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 04:30:25,556 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 04:30:25,557 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 04:30:25,565 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 04:30:25,565 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 04:30:25,565 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 04:30:25,567 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 04:30:25,567 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 04:30:25,568 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 04:30:25,568 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 04:30:25,569 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 04:30:25,570 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 04:30:25,571 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 04:30:25,571 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 04:30:25,571 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 04:30:25,572 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 04:30:25,572 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 04:30:25,572 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 04:30:25,573 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 04:30:25,573 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 04:30:25,574 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 04:30:25,608 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 04:30:25,609 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 04:30:25,609 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 04:30:25,609 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 04:30:25,610 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 04:30:25,610 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 04:30:25,610 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 04:30:25,610 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 04:30:25,611 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 04:30:25,611 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 04:30:25,611 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 04:30:25,611 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 04:30:25,612 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 04:30:25,612 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 04:30:25,612 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 04:30:25,612 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 04:30:25,612 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 04:30:25,612 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 04:30:25,613 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 04:30:25,613 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 04:30:25,613 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 04:30:25,613 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 04:30:25,613 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 04:30:25,613 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 04:30:25,613 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 04:30:25,613 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 04:30:25,614 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 04:30:25,614 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 04:30:25,614 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 04:30:25,614 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 04:30:25,614 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 04:30:25,614 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 04:30:25,615 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:30:25,615 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 04:30:25,615 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 04:30:25,615 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 04:30:25,615 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 04:30:25,615 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 04:30:25,615 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 04:30:25,615 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 04:30:25,616 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 04:30:25,616 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 04:30:25,863 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 04:30:25,890 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 04:30:25,895 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 04:30:25,896 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 04:30:25,896 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 04:30:25,898 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem19_label14.c [2023-04-01 04:30:27,100 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 04:30:27,670 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 04:30:27,671 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem19_label14.c [2023-04-01 04:30:27,730 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e9be69708/2abb761ad2fb4666b5c4a1149dce431e/FLAGd735c4dd4 [2023-04-01 04:30:27,743 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e9be69708/2abb761ad2fb4666b5c4a1149dce431e [2023-04-01 04:30:27,745 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 04:30:27,746 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 04:30:27,747 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 04:30:27,747 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 04:30:27,751 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 04:30:27,751 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:30:27" (1/1) ... [2023-04-01 04:30:27,752 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18c5b6c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:30:27, skipping insertion in model container [2023-04-01 04:30:27,753 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:30:27" (1/1) ... [2023-04-01 04:30:27,759 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 04:30:27,915 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 04:30:28,158 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/Problem19_label14.c[2035,2048] [2023-04-01 04:30:29,400 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:30:29,415 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 04:30:29,441 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/Problem19_label14.c[2035,2048] [2023-04-01 04:30:30,102 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:30:30,137 INFO L208 MainTranslator]: Completed translation [2023-04-01 04:30:30,137 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:30:30 WrapperNode [2023-04-01 04:30:30,138 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 04:30:30,139 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 04:30:30,139 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 04:30:30,139 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 04:30:30,150 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:30:30" (1/1) ... [2023-04-01 04:30:30,150 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:30:30" (1/1) ... [2023-04-01 04:30:30,239 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:30:30" (1/1) ... [2023-04-01 04:30:30,239 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:30:30" (1/1) ... [2023-04-01 04:30:30,377 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:30:30" (1/1) ... [2023-04-01 04:30:30,415 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:30:30" (1/1) ... [2023-04-01 04:30:30,449 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:30:30" (1/1) ... [2023-04-01 04:30:30,473 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:30:30" (1/1) ... [2023-04-01 04:30:30,531 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 04:30:30,532 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 04:30:30,532 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 04:30:30,533 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 04:30:30,534 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:30:30" (1/1) ... [2023-04-01 04:30:30,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:30:30,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:30:30,567 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 04:30:30,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 04:30:30,708 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 04:30:30,708 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 04:30:30,708 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 04:30:30,709 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 04:30:30,709 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 04:30:30,709 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-04-01 04:30:30,709 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-04-01 04:30:30,709 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2023-04-01 04:30:30,709 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2023-04-01 04:30:30,709 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 04:30:30,709 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 04:30:30,709 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 04:30:30,709 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-04-01 04:30:30,709 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-04-01 04:30:30,710 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2023-04-01 04:30:30,710 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2023-04-01 04:30:30,710 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 04:30:30,710 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 04:30:30,710 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 04:30:30,710 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 04:30:30,710 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 04:30:30,710 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 04:30:30,710 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 04:30:30,710 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 04:30:30,710 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 04:30:30,710 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 04:30:30,711 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 04:30:30,711 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 04:30:30,711 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 04:30:30,774 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 04:30:30,776 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 04:30:38,238 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 04:30:53,228 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 04:30:53,228 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 04:30:53,233 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:30:53 BoogieIcfgContainer [2023-04-01 04:30:53,233 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 04:30:53,236 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 04:30:53,236 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 04:30:53,240 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 04:30:53,240 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 04:30:27" (1/3) ... [2023-04-01 04:30:53,241 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40cb885e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:30:53, skipping insertion in model container [2023-04-01 04:30:53,241 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:30:30" (2/3) ... [2023-04-01 04:30:53,241 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40cb885e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:30:53, skipping insertion in model container [2023-04-01 04:30:53,241 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:30:53" (3/3) ... [2023-04-01 04:30:53,242 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem19_label14.c [2023-04-01 04:30:53,274 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 04:30:53,275 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 04:30:53,374 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 04:30:53,382 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;@538de1e1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 04:30:53,382 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 04:30:53,393 INFO L276 IsEmpty]: Start isEmpty. Operand has 1144 states, 1126 states have (on average 1.980461811722913) internal successors, (2230), 1127 states have internal predecessors, (2230), 8 states have call successors, (8), 8 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-04-01 04:30:53,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 04:30:53,399 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:30:53,400 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:30:53,401 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:30:53,406 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:30:53,407 INFO L85 PathProgramCache]: Analyzing trace with hash 1235639771, now seen corresponding path program 1 times [2023-04-01 04:30:53,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:30:53,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541681886] [2023-04-01 04:30:53,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:30:53,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:30:53,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:30:53,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:30:53,728 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:30:53,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541681886] [2023-04-01 04:30:53,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541681886] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:30:53,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:30:53,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 04:30:53,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993763745] [2023-04-01 04:30:53,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:30:53,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:30:53,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:30:53,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:30:53,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:30:53,907 INFO L87 Difference]: Start difference. First operand has 1144 states, 1126 states have (on average 1.980461811722913) internal successors, (2230), 1127 states have internal predecessors, (2230), 8 states have call successors, (8), 8 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:30:59,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:30:59,791 INFO L93 Difference]: Finished difference Result 3418 states and 6741 transitions. [2023-04-01 04:30:59,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 04:30:59,796 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-04-01 04:30:59,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:30:59,832 INFO L225 Difference]: With dead ends: 3418 [2023-04-01 04:30:59,833 INFO L226 Difference]: Without dead ends: 2271 [2023-04-01 04:30:59,843 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:30:59,848 INFO L413 NwaCegarLoop]: 224 mSDtfsCounter, 1191 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 3809 mSolverCounterSat, 914 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1191 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 4723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 914 IncrementalHoareTripleChecker+Valid, 3809 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2023-04-01 04:30:59,850 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1191 Valid, 259 Invalid, 4723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [914 Valid, 3809 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2023-04-01 04:30:59,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2271 states. [2023-04-01 04:30:59,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2271 to 2269. [2023-04-01 04:30:59,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2269 states, 2243 states have (on average 1.8872046366473474) internal successors, (4233), 2243 states have internal predecessors, (4233), 13 states have call successors, (13), 13 states have call predecessors, (13), 12 states have return successors, (22), 12 states have call predecessors, (22), 12 states have call successors, (22) [2023-04-01 04:31:00,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2269 states to 2269 states and 4268 transitions. [2023-04-01 04:31:00,005 INFO L78 Accepts]: Start accepts. Automaton has 2269 states and 4268 transitions. Word has length 11 [2023-04-01 04:31:00,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:31:00,006 INFO L495 AbstractCegarLoop]: Abstraction has 2269 states and 4268 transitions. [2023-04-01 04:31:00,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:31:00,006 INFO L276 IsEmpty]: Start isEmpty. Operand 2269 states and 4268 transitions. [2023-04-01 04:31:00,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-04-01 04:31:00,008 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:31:00,008 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] [2023-04-01 04:31:00,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 04:31:00,009 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:31:00,010 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:31:00,011 INFO L85 PathProgramCache]: Analyzing trace with hash 1025370201, now seen corresponding path program 1 times [2023-04-01 04:31:00,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:31:00,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689263228] [2023-04-01 04:31:00,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:31:00,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:31:00,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:31:00,272 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:31:00,272 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:31:00,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689263228] [2023-04-01 04:31:00,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689263228] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:31:00,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:31:00,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:31:00,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765057074] [2023-04-01 04:31:00,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:31:00,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:31:00,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:31:00,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:31:00,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:31:00,277 INFO L87 Difference]: Start difference. First operand 2269 states and 4268 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:31:08,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:31:08,232 INFO L93 Difference]: Finished difference Result 6869 states and 12971 transitions. [2023-04-01 04:31:08,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 04:31:08,237 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 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 25 [2023-04-01 04:31:08,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:31:08,259 INFO L225 Difference]: With dead ends: 6869 [2023-04-01 04:31:08,260 INFO L226 Difference]: Without dead ends: 4605 [2023-04-01 04:31:08,265 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-04-01 04:31:08,266 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 3856 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 6432 mSolverCounterSat, 2061 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3856 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 8493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2061 IncrementalHoareTripleChecker+Valid, 6432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.6s IncrementalHoareTripleChecker+Time [2023-04-01 04:31:08,267 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3856 Valid, 148 Invalid, 8493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2061 Valid, 6432 Invalid, 0 Unknown, 0 Unchecked, 7.6s Time] [2023-04-01 04:31:08,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4605 states. [2023-04-01 04:31:08,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4605 to 4572. [2023-04-01 04:31:08,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4572 states, 4507 states have (on average 1.8011981362325271) internal successors, (8118), 4511 states have internal predecessors, (8118), 23 states have call successors, (23), 23 states have call predecessors, (23), 41 states have return successors, (120), 37 states have call predecessors, (120), 22 states have call successors, (120) [2023-04-01 04:31:08,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4572 states to 4572 states and 8261 transitions. [2023-04-01 04:31:08,410 INFO L78 Accepts]: Start accepts. Automaton has 4572 states and 8261 transitions. Word has length 25 [2023-04-01 04:31:08,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:31:08,411 INFO L495 AbstractCegarLoop]: Abstraction has 4572 states and 8261 transitions. [2023-04-01 04:31:08,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:31:08,412 INFO L276 IsEmpty]: Start isEmpty. Operand 4572 states and 8261 transitions. [2023-04-01 04:31:08,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-04-01 04:31:08,412 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:31:08,412 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] [2023-04-01 04:31:08,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 04:31:08,413 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:31:08,413 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:31:08,413 INFO L85 PathProgramCache]: Analyzing trace with hash -912119855, now seen corresponding path program 1 times [2023-04-01 04:31:08,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:31:08,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722021763] [2023-04-01 04:31:08,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:31:08,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:31:08,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:31:08,603 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:31:08,603 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:31:08,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722021763] [2023-04-01 04:31:08,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722021763] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:31:08,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:31:08,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:31:08,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890276188] [2023-04-01 04:31:08,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:31:08,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:31:08,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:31:08,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:31:08,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:31:08,608 INFO L87 Difference]: Start difference. First operand 4572 states and 8261 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:31:16,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:31:16,354 INFO L93 Difference]: Finished difference Result 13013 states and 23486 transitions. [2023-04-01 04:31:16,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 04:31:16,355 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 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 29 [2023-04-01 04:31:16,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:31:16,403 INFO L225 Difference]: With dead ends: 13013 [2023-04-01 04:31:16,404 INFO L226 Difference]: Without dead ends: 8446 [2023-04-01 04:31:16,419 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-04-01 04:31:16,421 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 3802 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 6860 mSolverCounterSat, 1740 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3802 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 8600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1740 IncrementalHoareTripleChecker+Valid, 6860 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2023-04-01 04:31:16,423 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3802 Valid, 183 Invalid, 8600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1740 Valid, 6860 Invalid, 0 Unknown, 0 Unchecked, 7.4s Time] [2023-04-01 04:31:16,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8446 states. [2023-04-01 04:31:16,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8446 to 8256. [2023-04-01 04:31:16,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8256 states, 8050 states have (on average 1.5526708074534161) internal successors, (12499), 8078 states have internal predecessors, (12499), 38 states have call successors, (38), 38 states have call predecessors, (38), 167 states have return successors, (593), 139 states have call predecessors, (593), 37 states have call successors, (593) [2023-04-01 04:31:16,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8256 states to 8256 states and 13130 transitions. [2023-04-01 04:31:16,693 INFO L78 Accepts]: Start accepts. Automaton has 8256 states and 13130 transitions. Word has length 29 [2023-04-01 04:31:16,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:31:16,694 INFO L495 AbstractCegarLoop]: Abstraction has 8256 states and 13130 transitions. [2023-04-01 04:31:16,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:31:16,694 INFO L276 IsEmpty]: Start isEmpty. Operand 8256 states and 13130 transitions. [2023-04-01 04:31:16,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-04-01 04:31:16,695 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:31:16,695 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] [2023-04-01 04:31:16,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 04:31:16,696 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:31:16,696 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:31:16,696 INFO L85 PathProgramCache]: Analyzing trace with hash -390666423, now seen corresponding path program 1 times [2023-04-01 04:31:16,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:31:16,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602498588] [2023-04-01 04:31:16,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:31:16,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:31:16,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:31:16,834 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:31:16,834 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:31:16,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602498588] [2023-04-01 04:31:16,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602498588] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:31:16,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:31:16,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:31:16,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368273742] [2023-04-01 04:31:16,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:31:16,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:31:16,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:31:16,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:31:16,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:31:16,837 INFO L87 Difference]: Start difference. First operand 8256 states and 13130 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 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)