/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/Problem12_label44.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 19:23:03,499 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 19:23:03,501 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 19:23:03,539 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 19:23:03,539 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 19:23:03,542 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 19:23:03,545 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 19:23:03,547 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 19:23:03,549 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 19:23:03,553 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 19:23:03,555 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 19:23:03,556 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 19:23:03,556 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 19:23:03,559 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 19:23:03,560 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 19:23:03,561 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 19:23:03,561 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 19:23:03,562 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 19:23:03,564 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 19:23:03,568 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 19:23:03,569 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 19:23:03,570 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 19:23:03,571 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 19:23:03,572 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 19:23:03,580 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-02 19:23:03,581 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-02 19:23:03,581 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-02 19:23:03,582 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-02 19:23:03,583 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-02 19:23:03,583 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-02 19:23:03,584 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 19:23:03,584 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 19:23:03,585 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 19:23:03,586 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 19:23:03,586 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 19:23:03,587 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 19:23:03,587 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 19:23:03,587 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 19:23:03,587 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 19:23:03,588 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 19:23:03,589 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 19:23:03,590 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 [2023-04-02 19:23:03,618 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 19:23:03,618 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 19:23:03,618 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 19:23:03,618 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 19:23:03,619 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 19:23:03,619 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 19:23:03,620 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 19:23:03,620 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 19:23:03,620 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 19:23:03,620 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 19:23:03,621 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 19:23:03,621 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 19:23:03,621 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 19:23:03,621 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 19:23:03,621 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 19:23:03,621 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 19:23:03,622 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 19:23:03,622 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 19:23:03,622 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 19:23:03,622 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 19:23:03,623 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 19:23:03,623 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 19:23:03,623 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 19:23:03,623 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 19:23:03,623 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 19:23:03,623 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 19:23:03,623 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 19:23:03,624 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 19:23:03,624 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 19:23:03,624 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 19:23:03,624 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 19:23:03,624 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 19:23:03,625 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 19:23:03,625 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 19:23:03,625 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 19:23:03,625 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 19:23:03,625 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 19:23:03,625 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 19:23:03,625 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 19:23:03,626 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 19:23:03,626 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 19:23:03,626 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 19:23:03,860 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 19:23:03,887 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 19:23:03,890 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 19:23:03,891 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 19:23:03,892 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 19:23:03,893 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem12_label44.c [2023-04-02 19:23:05,124 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 19:23:05,551 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 19:23:05,552 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label44.c [2023-04-02 19:23:05,586 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f6dfc98d/f7654ac2080440d4990cb64ffbf7a159/FLAG62d27953c [2023-04-02 19:23:05,600 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f6dfc98d/f7654ac2080440d4990cb64ffbf7a159 [2023-04-02 19:23:05,602 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 19:23:05,604 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 19:23:05,605 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 19:23:05,605 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 19:23:05,608 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 19:23:05,609 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 07:23:05" (1/1) ... [2023-04-02 19:23:05,610 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@712d888a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:23:05, skipping insertion in model container [2023-04-02 19:23:05,610 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 07:23:05" (1/1) ... [2023-04-02 19:23:05,616 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 19:23:05,726 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 19:23:05,935 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_label44.c[6250,6263] [2023-04-02 19:23:06,618 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 19:23:06,629 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 19:23:06,661 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_label44.c[6250,6263] [2023-04-02 19:23:07,032 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 19:23:07,054 INFO L208 MainTranslator]: Completed translation [2023-04-02 19:23:07,055 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:23:07 WrapperNode [2023-04-02 19:23:07,055 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 19:23:07,056 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 19:23:07,057 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 19:23:07,057 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 19:23:07,067 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:23:07" (1/1) ... [2023-04-02 19:23:07,067 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:23:07" (1/1) ... [2023-04-02 19:23:07,118 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:23:07" (1/1) ... [2023-04-02 19:23:07,118 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:23:07" (1/1) ... [2023-04-02 19:23:07,247 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:23:07" (1/1) ... [2023-04-02 19:23:07,276 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:23:07" (1/1) ... [2023-04-02 19:23:07,324 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:23:07" (1/1) ... [2023-04-02 19:23:07,338 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:23:07" (1/1) ... [2023-04-02 19:23:07,367 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 19:23:07,369 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 19:23:07,369 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 19:23:07,369 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 19:23:07,370 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:23:07" (1/1) ... [2023-04-02 19:23:07,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 19:23:07,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 19:23:07,400 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) [2023-04-02 19:23:07,425 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 [2023-04-02 19:23:07,438 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 19:23:07,438 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 19:23:07,438 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 19:23:07,438 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-02 19:23:07,438 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-02 19:23:07,438 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-04-02 19:23:07,438 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-04-02 19:23:07,438 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 19:23:07,439 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-02 19:23:07,439 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-02 19:23:07,439 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-04-02 19:23:07,439 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-04-02 19:23:07,439 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 19:23:07,439 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 19:23:07,439 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 19:23:07,439 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 19:23:07,440 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-02 19:23:07,440 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-02 19:23:07,440 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 19:23:07,440 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 19:23:07,440 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 19:23:07,440 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 19:23:07,440 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 19:23:07,440 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 19:23:07,441 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 19:23:07,534 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 19:23:07,536 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 19:23:11,409 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 19:23:11,983 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 19:23:11,983 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-02 19:23:11,989 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 07:23:11 BoogieIcfgContainer [2023-04-02 19:23:11,989 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 19:23:11,992 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 19:23:11,992 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 19:23:11,995 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 19:23:11,995 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 07:23:05" (1/3) ... [2023-04-02 19:23:11,996 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36fc8ba4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 07:23:11, skipping insertion in model container [2023-04-02 19:23:11,996 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:23:07" (2/3) ... [2023-04-02 19:23:11,996 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36fc8ba4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 07:23:11, skipping insertion in model container [2023-04-02 19:23:11,996 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 07:23:11" (3/3) ... [2023-04-02 19:23:11,997 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem12_label44.c [2023-04-02 19:23:12,014 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 19:23:12,014 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 19:23:12,090 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 19:23:12,095 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;@6a86e9a2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 19:23:12,096 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 19:23:12,104 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) [2023-04-02 19:23:12,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-02 19:23:12,110 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 19:23:12,110 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 19:23:12,111 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 19:23:12,115 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 19:23:12,116 INFO L85 PathProgramCache]: Analyzing trace with hash 832858338, now seen corresponding path program 1 times [2023-04-02 19:23:12,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 19:23:12,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904691635] [2023-04-02 19:23:12,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 19:23:12,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 19:23:12,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 19:23:12,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 19:23:12,514 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 19:23:12,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904691635] [2023-04-02 19:23:12,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904691635] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 19:23:12,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 19:23:12,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 19:23:12,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886232787] [2023-04-02 19:23:12,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 19:23:12,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 19:23:12,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 19:23:12,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 19:23:12,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 19:23:12,563 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) [2023-04-02 19:23:15,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 19:23:15,973 INFO L93 Difference]: Finished difference Result 2068 states and 4065 transitions. [2023-04-02 19:23:15,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 19:23:15,976 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 [2023-04-02 19:23:15,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 19:23:15,996 INFO L225 Difference]: With dead ends: 2068 [2023-04-02 19:23:15,996 INFO L226 Difference]: Without dead ends: 1371 [2023-04-02 19:23:16,005 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 [2023-04-02 19:23:16,008 INFO L413 NwaCegarLoop]: 473 mSDtfsCounter, 725 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 2073 mSolverCounterSat, 632 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s 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, 3.2s IncrementalHoareTripleChecker+Time [2023-04-02 19:23:16,009 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [725 Valid, 498 Invalid, 2705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [632 Valid, 2073 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2023-04-02 19:23:16,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1371 states. [2023-04-02 19:23:16,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1371 to 1368. [2023-04-02 19:23:16,100 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) [2023-04-02 19:23:16,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1368 states to 1368 states and 2252 transitions. [2023-04-02 19:23:16,112 INFO L78 Accepts]: Start accepts. Automaton has 1368 states and 2252 transitions. Word has length 11 [2023-04-02 19:23:16,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 19:23:16,113 INFO L495 AbstractCegarLoop]: Abstraction has 1368 states and 2252 transitions. [2023-04-02 19:23:16,113 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) [2023-04-02 19:23:16,113 INFO L276 IsEmpty]: Start isEmpty. Operand 1368 states and 2252 transitions. [2023-04-02 19:23:16,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-04-02 19:23:16,115 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 19:23:16,115 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] [2023-04-02 19:23:16,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 19:23:16,115 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 19:23:16,116 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 19:23:16,116 INFO L85 PathProgramCache]: Analyzing trace with hash -732061047, now seen corresponding path program 1 times [2023-04-02 19:23:16,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 19:23:16,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032319763] [2023-04-02 19:23:16,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 19:23:16,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 19:23:16,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 19:23:16,331 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 19:23:16,332 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 19:23:16,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032319763] [2023-04-02 19:23:16,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032319763] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 19:23:16,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 19:23:16,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 19:23:16,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940054827] [2023-04-02 19:23:16,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 19:23:16,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 19:23:16,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 19:23:16,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 19:23:16,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-02 19:23:16,338 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) [2023-04-02 19:23:20,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 19:23:20,647 INFO L93 Difference]: Finished difference Result 4148 states and 6855 transitions. [2023-04-02 19:23:20,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 19:23:20,648 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 [2023-04-02 19:23:20,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 19:23:20,662 INFO L225 Difference]: With dead ends: 4148 [2023-04-02 19:23:20,662 INFO L226 Difference]: Without dead ends: 2785 [2023-04-02 19:23:20,666 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 [2023-04-02 19:23:20,667 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 2645 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 4201 mSolverCounterSat, 670 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s 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, 4.1s IncrementalHoareTripleChecker+Time [2023-04-02 19:23:20,668 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2645 Valid, 89 Invalid, 4871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [670 Valid, 4201 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2023-04-02 19:23:20,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2785 states. [2023-04-02 19:23:20,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2785 to 2756. [2023-04-02 19:23:20,741 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) [2023-04-02 19:23:20,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2756 states to 2756 states and 4120 transitions. [2023-04-02 19:23:20,752 INFO L78 Accepts]: Start accepts. Automaton has 2756 states and 4120 transitions. Word has length 31 [2023-04-02 19:23:20,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 19:23:20,753 INFO L495 AbstractCegarLoop]: Abstraction has 2756 states and 4120 transitions. [2023-04-02 19:23:20,753 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) [2023-04-02 19:23:20,754 INFO L276 IsEmpty]: Start isEmpty. Operand 2756 states and 4120 transitions. [2023-04-02 19:23:20,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-04-02 19:23:20,756 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 19:23:20,756 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] [2023-04-02 19:23:20,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-02 19:23:20,757 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 19:23:20,757 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 19:23:20,757 INFO L85 PathProgramCache]: Analyzing trace with hash 655421256, now seen corresponding path program 1 times [2023-04-02 19:23:20,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 19:23:20,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198227749] [2023-04-02 19:23:20,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 19:23:20,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 19:23:20,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 19:23:21,083 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 19:23:21,083 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 19:23:21,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198227749] [2023-04-02 19:23:21,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198227749] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 19:23:21,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 19:23:21,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 19:23:21,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367118710] [2023-04-02 19:23:21,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 19:23:21,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 19:23:21,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 19:23:21,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 19:23:21,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 19:23:21,086 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) [2023-04-02 19:23:24,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 19:23:24,668 INFO L93 Difference]: Finished difference Result 8417 states and 12813 transitions. [2023-04-02 19:23:24,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 19:23:24,668 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 [2023-04-02 19:23:24,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 19:23:24,696 INFO L225 Difference]: With dead ends: 8417 [2023-04-02 19:23:24,697 INFO L226 Difference]: Without dead ends: 5666 [2023-04-02 19:23:24,703 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 [2023-04-02 19:23:24,704 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 2402 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 3760 mSolverCounterSat, 1285 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s 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, 3.4s IncrementalHoareTripleChecker+Time [2023-04-02 19:23:24,704 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2402 Valid, 100 Invalid, 5045 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1285 Valid, 3760 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2023-04-02 19:23:24,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5666 states. [2023-04-02 19:23:24,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5666 to 5604. [2023-04-02 19:23:24,809 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) [2023-04-02 19:23:24,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5604 states to 5604 states and 8159 transitions. [2023-04-02 19:23:24,827 INFO L78 Accepts]: Start accepts. Automaton has 5604 states and 8159 transitions. Word has length 60 [2023-04-02 19:23:24,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 19:23:24,828 INFO L495 AbstractCegarLoop]: Abstraction has 5604 states and 8159 transitions. [2023-04-02 19:23:24,828 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) [2023-04-02 19:23:24,828 INFO L276 IsEmpty]: Start isEmpty. Operand 5604 states and 8159 transitions. [2023-04-02 19:23:24,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-04-02 19:23:24,830 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 19:23:24,830 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] [2023-04-02 19:23:24,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-02 19:23:24,831 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 19:23:24,831 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 19:23:24,831 INFO L85 PathProgramCache]: Analyzing trace with hash 1480208539, now seen corresponding path program 1 times [2023-04-02 19:23:24,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 19:23:24,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088194820] [2023-04-02 19:23:24,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 19:23:24,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 19:23:24,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 19:23:25,040 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 19:23:25,040 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 19:23:25,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088194820] [2023-04-02 19:23:25,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088194820] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 19:23:25,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544908318] [2023-04-02 19:23:25,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 19:23:25,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 19:23:25,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 19:23:25,047 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) [2023-04-02 19:23:25,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-02 19:23:25,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 19:23:25,154 INFO L262 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-02 19:23:25,159 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 19:23:25,353 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-02 19:23:25,353 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 19:23:25,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544908318] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 19:23:25,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 19:23:25,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-04-02 19:23:25,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18772948] [2023-04-02 19:23:25,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 19:23:25,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 19:23:25,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 19:23:25,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 19:23:25,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-04-02 19:23:25,355 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) [2023-04-02 19:23:29,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 19:23:29,166 INFO L93 Difference]: Finished difference Result 17003 states and 25456 transitions. [2023-04-02 19:23:29,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 19:23:29,168 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 [2023-04-02 19:23:29,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 19:23:29,221 INFO L225 Difference]: With dead ends: 17003 [2023-04-02 19:23:29,222 INFO L226 Difference]: Without dead ends: 11404 [2023-04-02 19:23:29,239 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-04-02 19:23:29,240 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 2206 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 4593 mSolverCounterSat, 981 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s 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, 3.6s IncrementalHoareTripleChecker+Time [2023-04-02 19:23:29,240 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2206 Valid, 92 Invalid, 5574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [981 Valid, 4593 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2023-04-02 19:23:29,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11404 states. [2023-04-02 19:23:29,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11404 to 11316. [2023-04-02 19:23:29,542 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) [2023-04-02 19:23:29,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11316 states to 11316 states and 15532 transitions. [2023-04-02 19:23:29,568 INFO L78 Accepts]: Start accepts. Automaton has 11316 states and 15532 transitions. Word has length 74 [2023-04-02 19:23:29,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 19:23:29,570 INFO L495 AbstractCegarLoop]: Abstraction has 11316 states and 15532 transitions. [2023-04-02 19:23:29,570 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) [2023-04-02 19:23:29,570 INFO L276 IsEmpty]: Start isEmpty. Operand 11316 states and 15532 transitions. [2023-04-02 19:23:29,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-04-02 19:23:29,578 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 19:23:29,578 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] [2023-04-02 19:23:29,589 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-02 19:23:29,785 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 [2023-04-02 19:23:29,785 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 19:23:29,786 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 19:23:29,786 INFO L85 PathProgramCache]: Analyzing trace with hash -1633680436, now seen corresponding path program 1 times [2023-04-02 19:23:29,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 19:23:29,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803986302] [2023-04-02 19:23:29,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 19:23:29,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 19:23:29,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 19:23:30,002 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 33 proven. 20 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-04-02 19:23:30,002 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 19:23:30,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803986302] [2023-04-02 19:23:30,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803986302] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 19:23:30,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170526700] [2023-04-02 19:23:30,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 19:23:30,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 19:23:30,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 19:23:30,007 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) [2023-04-02 19:23:30,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-02 19:23:30,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 19:23:30,130 INFO L262 TraceCheckSpWp]: Trace formula consists of 593 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-02 19:23:30,133 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 19:23:30,230 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 59 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-02 19:23:30,231 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 19:23:30,419 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 33 proven. 20 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-04-02 19:23:30,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170526700] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 19:23:30,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [822365105] [2023-04-02 19:23:30,439 INFO L159 IcfgInterpreter]: Started Sifa with 50 locations of interest [2023-04-02 19:23:30,440 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 19:23:30,442 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 19:23:30,447 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 19:23:30,447 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 19:23:30,585 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 52 for LOIs [2023-04-02 19:23:30,782 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 44 [2023-04-02 19:23:36,915 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 70021 conjuctions. This might take some time... [2023-04-02 19:23:41,187 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 513 conjuctions. [2023-04-02 19:24:01,357 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 17