/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/Problem12_label03.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 10:02:21,465 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 10:02:21,467 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 10:02:21,498 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 10:02:21,499 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 10:02:21,501 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 10:02:21,503 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 10:02:21,505 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 10:02:21,506 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 10:02:21,510 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 10:02:21,511 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 10:02:21,512 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 10:02:21,513 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 10:02:21,515 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 10:02:21,515 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 10:02:21,516 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 10:02:21,517 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 10:02:21,518 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 10:02:21,519 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 10:02:21,524 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 10:02:21,525 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 10:02:21,526 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 10:02:21,527 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 10:02:21,528 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 10:02:21,538 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 10:02:21,539 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 10:02:21,539 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 10:02:21,540 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 10:02:21,540 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 10:02:21,540 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 10:02:21,540 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 10:02:21,541 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 10:02:21,541 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 10:02:21,542 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 10:02:21,542 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 10:02:21,542 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 10:02:21,543 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 10:02:21,543 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 10:02:21,543 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 10:02:21,544 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 10:02:21,544 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 10:02:21,545 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 10:02:21,565 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 10:02:21,566 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 10:02:21,567 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 10:02:21,567 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 10:02:21,567 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 10:02:21,567 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 10:02:21,568 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 10:02:21,568 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 10:02:21,568 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 10:02:21,568 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 10:02:21,568 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 10:02:21,569 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 10:02:21,569 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 10:02:21,569 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 10:02:21,569 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 10:02:21,569 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 10:02:21,569 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 10:02:21,569 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 10:02:21,570 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 10:02:21,570 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 10:02:21,570 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 10:02:21,570 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 10:02:21,570 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 10:02:21,570 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 10:02:21,570 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 10:02:21,570 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 10:02:21,570 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 10:02:21,570 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 10:02:21,571 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 10:02:21,571 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 10:02:21,571 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 10:02:21,571 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 10:02:21,571 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 10:02:21,571 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 10:02:21,571 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 10:02:21,571 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 10:02:21,571 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 10:02:21,571 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 10:02:21,572 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 10:02:21,572 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 10:02:21,572 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 10:02:21,572 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 10:02:21,771 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 10:02:21,792 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 10:02:21,794 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 10:02:21,795 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 10:02:21,796 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 10:02:21,797 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem12_label03.c [2023-04-01 10:02:22,849 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 10:02:23,230 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 10:02:23,231 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label03.c [2023-04-01 10:02:23,259 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/89e363692/f33da4e427e7446ca90ee95f8036e6d3/FLAG6ef272a6c [2023-04-01 10:02:23,274 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/89e363692/f33da4e427e7446ca90ee95f8036e6d3 [2023-04-01 10:02:23,276 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 10:02:23,278 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 10:02:23,281 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 10:02:23,282 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 10:02:23,285 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 10:02:23,285 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:02:23" (1/1) ... [2023-04-01 10:02:23,286 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a0154d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:02:23, skipping insertion in model container [2023-04-01 10:02:23,287 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:02:23" (1/1) ... [2023-04-01 10:02:23,292 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 10:02:23,379 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 10:02:23,595 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/Problem12_label03.c[2698,2711] [2023-04-01 10:02:24,173 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 10:02:24,182 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 10:02:24,201 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/Problem12_label03.c[2698,2711] [2023-04-01 10:02:24,456 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 10:02:24,473 INFO L208 MainTranslator]: Completed translation [2023-04-01 10:02:24,475 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:02:24 WrapperNode [2023-04-01 10:02:24,475 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 10:02:24,477 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 10:02:24,477 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 10:02:24,477 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 10:02:24,486 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:02:24" (1/1) ... [2023-04-01 10:02:24,486 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:02:24" (1/1) ... [2023-04-01 10:02:24,533 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:02:24" (1/1) ... [2023-04-01 10:02:24,533 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:02:24" (1/1) ... [2023-04-01 10:02:24,638 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:02:24" (1/1) ... [2023-04-01 10:02:24,659 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:02:24" (1/1) ... [2023-04-01 10:02:24,677 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:02:24" (1/1) ... [2023-04-01 10:02:24,689 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:02:24" (1/1) ... [2023-04-01 10:02:24,713 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 10:02:24,714 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 10:02:24,714 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 10:02:24,714 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 10:02:24,716 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:02:24" (1/1) ... [2023-04-01 10:02:24,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 10:02:24,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:02:24,739 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 10:02:24,761 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 10:02:24,782 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 10:02:24,782 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 10:02:24,783 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 10:02:24,783 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 10:02:24,783 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 10:02:24,783 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-04-01 10:02:24,783 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-04-01 10:02:24,783 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 10:02:24,783 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 10:02:24,783 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 10:02:24,783 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-04-01 10:02:24,783 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-04-01 10:02:24,783 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 10:02:24,783 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 10:02:24,783 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 10:02:24,783 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 10:02:24,784 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 10:02:24,784 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 10:02:24,784 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 10:02:24,784 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 10:02:24,784 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 10:02:24,784 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 10:02:24,784 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 10:02:24,784 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 10:02:24,784 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 10:02:24,858 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 10:02:24,860 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 10:02:27,887 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 10:02:28,425 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 10:02:28,426 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 10:02:28,429 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:02:28 BoogieIcfgContainer [2023-04-01 10:02:28,429 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 10:02:28,431 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 10:02:28,431 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 10:02:28,434 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 10:02:28,434 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 10:02:23" (1/3) ... [2023-04-01 10:02:28,434 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a724689 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:02:28, skipping insertion in model container [2023-04-01 10:02:28,434 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:02:24" (2/3) ... [2023-04-01 10:02:28,435 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a724689 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:02:28, skipping insertion in model container [2023-04-01 10:02:28,435 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:02:28" (3/3) ... [2023-04-01 10:02:28,436 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem12_label03.c [2023-04-01 10:02:28,451 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 10:02:28,451 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 10:02:28,505 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 10:02:28,511 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;@5c67c267, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 10:02:28,511 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 10:02:28,519 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 10:02:28,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 10:02:28,525 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:02:28,525 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:02:28,526 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:02:28,529 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:02:28,530 INFO L85 PathProgramCache]: Analyzing trace with hash 832850402, now seen corresponding path program 1 times [2023-04-01 10:02:28,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:02:28,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580342492] [2023-04-01 10:02:28,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:02:28,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:02:28,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:02:28,788 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 10:02:28,789 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:02:28,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580342492] [2023-04-01 10:02:28,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580342492] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:02:28,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:02:28,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 10:02:28,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107227576] [2023-04-01 10:02:28,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:02:28,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 10:02:28,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:02:28,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 10:02:28,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:02:28,823 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 10:02:31,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:02:31,781 INFO L93 Difference]: Finished difference Result 2068 states and 4065 transitions. [2023-04-01 10:02:31,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 10:02:31,783 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 10:02:31,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:02:31,804 INFO L225 Difference]: With dead ends: 2068 [2023-04-01 10:02:31,804 INFO L226 Difference]: Without dead ends: 1371 [2023-04-01 10:02:31,810 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 10:02:31,813 INFO L413 NwaCegarLoop]: 473 mSDtfsCounter, 725 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 2073 mSolverCounterSat, 632 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 725 SdHoareTripleChecker+Valid, 498 SdHoareTripleChecker+Invalid, 2705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 632 IncrementalHoareTripleChecker+Valid, 2073 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-04-01 10:02:31,814 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [725 Valid, 498 Invalid, 2705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [632 Valid, 2073 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-04-01 10:02:31,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1371 states. [2023-04-01 10:02:31,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1371 to 1368. [2023-04-01 10:02:31,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1368 states, 1350 states have (on average 1.6511111111111112) internal successors, (2229), 1350 states have internal predecessors, (2229), 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 10:02:31,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1368 states to 1368 states and 2252 transitions. [2023-04-01 10:02:31,913 INFO L78 Accepts]: Start accepts. Automaton has 1368 states and 2252 transitions. Word has length 11 [2023-04-01 10:02:31,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:02:31,913 INFO L495 AbstractCegarLoop]: Abstraction has 1368 states and 2252 transitions. [2023-04-01 10:02:31,913 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 10:02:31,913 INFO L276 IsEmpty]: Start isEmpty. Operand 1368 states and 2252 transitions. [2023-04-01 10:02:31,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-04-01 10:02:31,915 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:02:31,915 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] [2023-04-01 10:02:31,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 10:02:31,916 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:02:31,916 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:02:31,916 INFO L85 PathProgramCache]: Analyzing trace with hash -2100250239, now seen corresponding path program 1 times [2023-04-01 10:02:31,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:02:31,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057900553] [2023-04-01 10:02:31,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:02:31,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:02:31,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:02:32,170 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 10:02:32,170 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:02:32,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057900553] [2023-04-01 10:02:32,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057900553] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:02:32,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:02:32,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 10:02:32,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091871307] [2023-04-01 10:02:32,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:02:32,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:02:32,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:02:32,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:02:32,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 10:02:32,173 INFO L87 Difference]: Start difference. First operand 1368 states and 2252 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 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 10:02:35,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:02:35,767 INFO L93 Difference]: Finished difference Result 4148 states and 6855 transitions. [2023-04-01 10:02:35,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 10:02:35,768 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 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 31 [2023-04-01 10:02:35,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:02:35,778 INFO L225 Difference]: With dead ends: 4148 [2023-04-01 10:02:35,778 INFO L226 Difference]: Without dead ends: 2785 [2023-04-01 10:02:35,781 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-04-01 10:02:35,782 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 2645 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 4201 mSolverCounterSat, 670 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2645 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 4871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 670 IncrementalHoareTripleChecker+Valid, 4201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2023-04-01 10:02:35,782 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2645 Valid, 89 Invalid, 4871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [670 Valid, 4201 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2023-04-01 10:02:35,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2785 states. [2023-04-01 10:02:35,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2785 to 2756. [2023-04-01 10:02:35,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2756 states, 2714 states have (on average 1.4896831245394253) internal successors, (4043), 2718 states have internal predecessors, (4043), 15 states have call successors, (15), 15 states have call predecessors, (15), 26 states have return successors, (62), 22 states have call predecessors, (62), 14 states have call successors, (62) [2023-04-01 10:02:35,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2756 states to 2756 states and 4120 transitions. [2023-04-01 10:02:35,885 INFO L78 Accepts]: Start accepts. Automaton has 2756 states and 4120 transitions. Word has length 31 [2023-04-01 10:02:35,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:02:35,886 INFO L495 AbstractCegarLoop]: Abstraction has 2756 states and 4120 transitions. [2023-04-01 10:02:35,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 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 10:02:35,886 INFO L276 IsEmpty]: Start isEmpty. Operand 2756 states and 4120 transitions. [2023-04-01 10:02:35,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-04-01 10:02:35,888 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:02:35,888 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:02:35,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 10:02:35,888 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:02:35,889 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:02:35,889 INFO L85 PathProgramCache]: Analyzing trace with hash -1202979504, now seen corresponding path program 1 times [2023-04-01 10:02:35,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:02:35,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135060079] [2023-04-01 10:02:35,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:02:35,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:02:35,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:02:36,145 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 10:02:36,145 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:02:36,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135060079] [2023-04-01 10:02:36,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135060079] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:02:36,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:02:36,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 10:02:36,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881993300] [2023-04-01 10:02:36,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:02:36,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:02:36,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:02:36,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:02:36,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 10:02:36,149 INFO L87 Difference]: Start difference. First operand 2756 states and 4120 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 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 10:02:39,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:02:39,719 INFO L93 Difference]: Finished difference Result 8417 states and 12813 transitions. [2023-04-01 10:02:39,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 10:02:39,722 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 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 60 [2023-04-01 10:02:39,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:02:39,751 INFO L225 Difference]: With dead ends: 8417 [2023-04-01 10:02:39,751 INFO L226 Difference]: Without dead ends: 5666 [2023-04-01 10:02:39,760 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 10:02:39,762 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 2402 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 3760 mSolverCounterSat, 1285 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2402 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 5045 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1285 IncrementalHoareTripleChecker+Valid, 3760 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2023-04-01 10:02:39,764 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2402 Valid, 100 Invalid, 5045 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1285 Valid, 3760 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2023-04-01 10:02:39,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5666 states. [2023-04-01 10:02:39,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5666 to 5604. [2023-04-01 10:02:39,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5604 states, 5486 states have (on average 1.4279985417426175) internal successors, (7834), 5509 states have internal predecessors, (7834), 28 states have call successors, (28), 28 states have call predecessors, (28), 89 states have return successors, (297), 66 states have call predecessors, (297), 27 states have call successors, (297) [2023-04-01 10:02:39,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5604 states to 5604 states and 8159 transitions. [2023-04-01 10:02:39,901 INFO L78 Accepts]: Start accepts. Automaton has 5604 states and 8159 transitions. Word has length 60 [2023-04-01 10:02:39,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:02:39,901 INFO L495 AbstractCegarLoop]: Abstraction has 5604 states and 8159 transitions. [2023-04-01 10:02:39,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 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 10:02:39,902 INFO L276 IsEmpty]: Start isEmpty. Operand 5604 states and 8159 transitions. [2023-04-01 10:02:39,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-04-01 10:02:39,903 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:02:39,904 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:02:39,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 10:02:39,904 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:02:39,904 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:02:39,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1255078245, now seen corresponding path program 1 times [2023-04-01 10:02:39,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:02:39,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170440685] [2023-04-01 10:02:39,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:02:39,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:02:39,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:02:40,097 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 10:02:40,097 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:02:40,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170440685] [2023-04-01 10:02:40,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170440685] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 10:02:40,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718853029] [2023-04-01 10:02:40,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:02:40,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:02:40,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:02:40,100 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 10:02:40,124 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 10:02:40,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:02:40,207 INFO L262 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 10:02:40,211 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 10:02:40,348 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 10:02:40,348 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 10:02:40,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718853029] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:02:40,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 10:02:40,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-04-01 10:02:40,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755207212] [2023-04-01 10:02:40,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:02:40,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:02:40,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:02:40,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:02:40,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-04-01 10:02:40,350 INFO L87 Difference]: Start difference. First operand 5604 states and 8159 transitions. Second operand has 5 states, 5 states have (on average 12.4) internal successors, (62), 4 states have internal predecessors, (62), 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 10:02:43,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:02:43,958 INFO L93 Difference]: Finished difference Result 17003 states and 25456 transitions. [2023-04-01 10:02:43,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 10:02:43,959 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 4 states have internal predecessors, (62), 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 74 [2023-04-01 10:02:43,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:02:44,008 INFO L225 Difference]: With dead ends: 17003 [2023-04-01 10:02:44,009 INFO L226 Difference]: Without dead ends: 11404 [2023-04-01 10:02:44,026 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-04-01 10:02:44,031 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 2206 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 4593 mSolverCounterSat, 981 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2206 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 5574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 981 IncrementalHoareTripleChecker+Valid, 4593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2023-04-01 10:02:44,033 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2206 Valid, 92 Invalid, 5574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [981 Valid, 4593 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2023-04-01 10:02:44,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11404 states. [2023-04-01 10:02:44,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11404 to 11316. [2023-04-01 10:02:44,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11316 states, 11031 states have (on average 1.3050494062188378) internal successors, (14396), 11099 states have internal predecessors, (14396), 52 states have call successors, (52), 52 states have call predecessors, (52), 232 states have return successors, (1084), 164 states have call predecessors, (1084), 51 states have call successors, (1084) [2023-04-01 10:02:44,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11316 states to 11316 states and 15532 transitions. [2023-04-01 10:02:44,327 INFO L78 Accepts]: Start accepts. Automaton has 11316 states and 15532 transitions. Word has length 74 [2023-04-01 10:02:44,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:02:44,328 INFO L495 AbstractCegarLoop]: Abstraction has 11316 states and 15532 transitions. [2023-04-01 10:02:44,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 4 states have internal predecessors, (62), 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 10:02:44,328 INFO L276 IsEmpty]: Start isEmpty. Operand 11316 states and 15532 transitions. [2023-04-01 10:02:44,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-04-01 10:02:44,333 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:02:44,334 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 10:02:44,347 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 10:02:44,540 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 10:02:44,540 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:02:44,540 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:02:44,541 INFO L85 PathProgramCache]: Analyzing trace with hash -2046064428, now seen corresponding path program 1 times [2023-04-01 10:02:44,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:02:44,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099378644] [2023-04-01 10:02:44,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:02:44,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:02:44,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:02:44,706 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 33 proven. 20 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-04-01 10:02:44,707 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:02:44,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099378644] [2023-04-01 10:02:44,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099378644] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 10:02:44,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966077817] [2023-04-01 10:02:44,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:02:44,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:02:44,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:02:44,711 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 10:02:44,714 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 10:02:44,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:02:44,821 INFO L262 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 10:02:44,825 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 10:02:44,901 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 59 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 10:02:44,901 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 10:02:45,069 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 33 proven. 20 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-04-01 10:02:45,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966077817] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 10:02:45,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1328586499] [2023-04-01 10:02:45,122 INFO L159 IcfgInterpreter]: Started Sifa with 50 locations of interest [2023-04-01 10:02:45,123 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 10:02:45,125 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 10:02:45,129 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 10:02:45,129 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 10:02:45,371 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 84 for LOIs [2023-04-01 10:02:45,600 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 13 [2023-04-01 10:02:52,532 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 48