/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/Problem13_label50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 19:34:04,331 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 19:34:04,333 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 19:34:04,359 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 19:34:04,360 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 19:34:04,360 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 19:34:04,366 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 19:34:04,368 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 19:34:04,369 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 19:34:04,372 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 19:34:04,374 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 19:34:04,375 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 19:34:04,375 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 19:34:04,378 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 19:34:04,379 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 19:34:04,380 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 19:34:04,381 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 19:34:04,381 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 19:34:04,383 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 19:34:04,385 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 19:34:04,385 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 19:34:04,387 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 19:34:04,387 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 19:34:04,388 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 19:34:04,393 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-02 19:34:04,395 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 19:34:04,395 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 19:34:04,396 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 19:34:04,396 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 19:34:04,396 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 19:34:04,397 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 19:34:04,397 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 19:34:04,397 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 19:34:04,397 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 19:34:04,398 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 19:34:04,398 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 19:34:04,401 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 19:34:04,424 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 19:34:04,424 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 19:34:04,424 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 19:34:04,424 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 19:34:04,425 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 19:34:04,425 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 19:34:04,425 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 19:34:04,425 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 19:34:04,425 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 19:34:04,425 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 19:34:04,425 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 19:34:04,425 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 19:34:04,425 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 19:34:04,425 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 19:34:04,425 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 19:34:04,426 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 19:34:04,426 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 19:34:04,426 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 19:34:04,426 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 19:34:04,426 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 19:34:04,426 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 19:34:04,426 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 19:34:04,426 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 19:34:04,426 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 19:34:04,427 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 19:34:04,427 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 19:34:04,427 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 19:34:04,427 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 19:34:04,427 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 19:34:04,427 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 19:34:04,427 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 19:34:04,427 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 19:34:04,427 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 19:34:04,427 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 19:34:04,428 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 19:34:04,428 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 19:34:04,428 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 19:34:04,428 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 19:34:04,428 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 19:34:04,428 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 19:34:04,428 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 19:34:04,428 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 19:34:04,628 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 19:34:04,642 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 19:34:04,644 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 19:34:04,645 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 19:34:04,645 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 19:34:04,646 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem13_label50.c [2023-04-02 19:34:05,597 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 19:34:05,918 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 19:34:05,918 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label50.c [2023-04-02 19:34:05,944 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a7b51ce84/e4a30dcfd0194f8ba53fe7fada30da52/FLAG8a4390cf7 [2023-04-02 19:34:05,959 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a7b51ce84/e4a30dcfd0194f8ba53fe7fada30da52 [2023-04-02 19:34:05,961 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 19:34:05,962 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 19:34:05,965 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 19:34:05,965 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 19:34:05,967 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 19:34:05,968 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 07:34:05" (1/1) ... [2023-04-02 19:34:05,969 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b6e7e0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:34:05, skipping insertion in model container [2023-04-02 19:34:05,969 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 07:34:05" (1/1) ... [2023-04-02 19:34:05,974 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 19:34:06,088 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 19:34:06,345 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label50.c[8814,8827] [2023-04-02 19:34:07,003 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 19:34:07,012 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 19:34:07,037 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label50.c[8814,8827] [2023-04-02 19:34:07,370 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 19:34:07,388 INFO L208 MainTranslator]: Completed translation [2023-04-02 19:34:07,389 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:34:07 WrapperNode [2023-04-02 19:34:07,389 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 19:34:07,390 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 19:34:07,390 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 19:34:07,390 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 19:34:07,398 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:34:07" (1/1) ... [2023-04-02 19:34:07,398 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:34:07" (1/1) ... [2023-04-02 19:34:07,486 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:34:07" (1/1) ... [2023-04-02 19:34:07,486 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:34:07" (1/1) ... [2023-04-02 19:34:07,654 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:34:07" (1/1) ... [2023-04-02 19:34:07,676 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:34:07" (1/1) ... [2023-04-02 19:34:07,700 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:34:07" (1/1) ... [2023-04-02 19:34:07,713 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:34:07" (1/1) ... [2023-04-02 19:34:07,755 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 19:34:07,757 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 19:34:07,757 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 19:34:07,757 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 19:34:07,758 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:34:07" (1/1) ... [2023-04-02 19:34:07,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 19:34:07,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 19:34:07,785 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 19:34:07,802 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 19:34:07,814 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 19:34:07,814 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 19:34:07,814 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 19:34:07,814 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-02 19:34:07,814 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-02 19:34:07,814 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-04-02 19:34:07,814 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-04-02 19:34:07,814 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 19:34:07,814 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-02 19:34:07,815 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-02 19:34:07,815 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-04-02 19:34:07,815 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-04-02 19:34:07,815 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 19:34:07,815 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 19:34:07,815 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 19:34:07,815 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 19:34:07,815 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-02 19:34:07,815 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-02 19:34:07,815 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 19:34:07,815 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 19:34:07,815 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 19:34:07,815 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 19:34:07,815 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 19:34:07,815 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 19:34:07,815 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 19:34:07,919 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 19:34:07,921 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 19:34:11,529 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 19:34:13,609 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 19:34:13,610 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-02 19:34:13,613 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 07:34:13 BoogieIcfgContainer [2023-04-02 19:34:13,613 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 19:34:13,614 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 19:34:13,614 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 19:34:13,616 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 19:34:13,616 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 07:34:05" (1/3) ... [2023-04-02 19:34:13,617 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c43604d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 07:34:13, skipping insertion in model container [2023-04-02 19:34:13,617 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:34:07" (2/3) ... [2023-04-02 19:34:13,617 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c43604d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 07:34:13, skipping insertion in model container [2023-04-02 19:34:13,617 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 07:34:13" (3/3) ... [2023-04-02 19:34:13,618 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem13_label50.c [2023-04-02 19:34:13,632 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 19:34:13,632 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 19:34:13,673 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 19:34:13,677 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;@55298f7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 19:34:13,678 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 19:34:13,683 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 19:34:13,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-02 19:34:13,688 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 19:34:13,688 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 19:34:13,689 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 19:34:13,692 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 19:34:13,693 INFO L85 PathProgramCache]: Analyzing trace with hash -330925772, now seen corresponding path program 1 times [2023-04-02 19:34:13,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 19:34:13,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440953286] [2023-04-02 19:34:13,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 19:34:13,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 19:34:13,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 19:34:13,916 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 19:34:13,916 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 19:34:13,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440953286] [2023-04-02 19:34:13,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440953286] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 19:34:13,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 19:34:13,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 19:34:13,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596588176] [2023-04-02 19:34:13,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 19:34:13,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 19:34:13,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 19:34:13,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 19:34:13,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 19:34:13,955 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 19:34:16,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 19:34:16,909 INFO L93 Difference]: Finished difference Result 2068 states and 4065 transitions. [2023-04-02 19:34:16,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 19:34:16,911 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 19:34:16,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 19:34:16,931 INFO L225 Difference]: With dead ends: 2068 [2023-04-02 19:34:16,931 INFO L226 Difference]: Without dead ends: 1371 [2023-04-02 19:34:16,943 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 19:34:16,945 INFO L413 NwaCegarLoop]: 280 mSDtfsCounter, 831 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 2080 mSolverCounterSat, 650 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 831 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 2730 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 650 IncrementalHoareTripleChecker+Valid, 2080 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-04-02 19:34:16,946 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [831 Valid, 305 Invalid, 2730 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [650 Valid, 2080 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-04-02 19:34:16,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1371 states. [2023-04-02 19:34:17,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1371 to 1369. [2023-04-02 19:34:17,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1369 states, 1351 states have (on average 1.7535159141376757) internal successors, (2369), 1351 states have internal predecessors, (2369), 9 states have call successors, (9), 9 states have call predecessors, (9), 8 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2023-04-02 19:34:17,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1369 states to 1369 states and 2392 transitions. [2023-04-02 19:34:17,044 INFO L78 Accepts]: Start accepts. Automaton has 1369 states and 2392 transitions. Word has length 11 [2023-04-02 19:34:17,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 19:34:17,045 INFO L495 AbstractCegarLoop]: Abstraction has 1369 states and 2392 transitions. [2023-04-02 19:34:17,045 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 19:34:17,045 INFO L276 IsEmpty]: Start isEmpty. Operand 1369 states and 2392 transitions. [2023-04-02 19:34:17,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-04-02 19:34:17,046 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 19:34:17,046 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 19:34:17,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 19:34:17,047 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 19:34:17,047 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 19:34:17,047 INFO L85 PathProgramCache]: Analyzing trace with hash -288882729, now seen corresponding path program 1 times [2023-04-02 19:34:17,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 19:34:17,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555804247] [2023-04-02 19:34:17,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 19:34:17,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 19:34:17,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 19:34:17,265 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 19:34:17,265 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 19:34:17,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555804247] [2023-04-02 19:34:17,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555804247] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 19:34:17,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 19:34:17,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 19:34:17,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039120623] [2023-04-02 19:34:17,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 19:34:17,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 19:34:17,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 19:34:17,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 19:34:17,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 19:34:17,268 INFO L87 Difference]: Start difference. First operand 1369 states and 2392 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 19:34:21,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 19:34:21,571 INFO L93 Difference]: Finished difference Result 4183 states and 7346 transitions. [2023-04-02 19:34:21,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-02 19:34:21,571 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2023-04-02 19:34:21,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 19:34:21,583 INFO L225 Difference]: With dead ends: 4183 [2023-04-02 19:34:21,583 INFO L226 Difference]: Without dead ends: 2819 [2023-04-02 19:34:21,587 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 19:34:21,587 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 2235 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 4325 mSolverCounterSat, 1090 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2235 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 5415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1090 IncrementalHoareTripleChecker+Valid, 4325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2023-04-02 19:34:21,588 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2235 Valid, 140 Invalid, 5415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1090 Valid, 4325 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2023-04-02 19:34:21,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2819 states. [2023-04-02 19:34:21,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2819 to 2751. [2023-04-02 19:34:21,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2751 states, 2708 states have (on average 1.5535450516986706) internal successors, (4207), 2713 states have internal predecessors, (4207), 15 states have call successors, (15), 15 states have call predecessors, (15), 27 states have return successors, (75), 22 states have call predecessors, (75), 14 states have call successors, (75) [2023-04-02 19:34:21,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2751 states to 2751 states and 4297 transitions. [2023-04-02 19:34:21,668 INFO L78 Accepts]: Start accepts. Automaton has 2751 states and 4297 transitions. Word has length 27 [2023-04-02 19:34:21,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 19:34:21,668 INFO L495 AbstractCegarLoop]: Abstraction has 2751 states and 4297 transitions. [2023-04-02 19:34:21,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 19:34:21,669 INFO L276 IsEmpty]: Start isEmpty. Operand 2751 states and 4297 transitions. [2023-04-02 19:34:21,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-04-02 19:34:21,670 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 19:34:21,670 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 19:34:21,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-02 19:34:21,670 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 19:34:21,672 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 19:34:21,672 INFO L85 PathProgramCache]: Analyzing trace with hash 861022651, now seen corresponding path program 1 times [2023-04-02 19:34:21,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 19:34:21,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597211096] [2023-04-02 19:34:21,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 19:34:21,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 19:34:21,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 19:34:21,860 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 19:34:21,860 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 19:34:21,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597211096] [2023-04-02 19:34:21,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597211096] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 19:34:21,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 19:34:21,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 19:34:21,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649407937] [2023-04-02 19:34:21,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 19:34:21,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 19:34:21,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 19:34:21,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 19:34:21,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 19:34:21,862 INFO L87 Difference]: Start difference. First operand 2751 states and 4297 transitions. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 19:34:26,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 19:34:26,100 INFO L93 Difference]: Finished difference Result 8433 states and 13565 transitions. [2023-04-02 19:34:26,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 19:34:26,105 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 41 [2023-04-02 19:34:26,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 19:34:26,130 INFO L225 Difference]: With dead ends: 8433 [2023-04-02 19:34:26,130 INFO L226 Difference]: Without dead ends: 5687 [2023-04-02 19:34:26,136 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 19:34:26,137 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 2123 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 5255 mSolverCounterSat, 854 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2123 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 6109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 854 IncrementalHoareTripleChecker+Valid, 5255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2023-04-02 19:34:26,138 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2123 Valid, 118 Invalid, 6109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [854 Valid, 5255 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2023-04-02 19:34:26,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5687 states. [2023-04-02 19:34:26,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5687 to 5570. [2023-04-02 19:34:26,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5570 states, 5445 states have (on average 1.5074380165289256) internal successors, (8208), 5471 states have internal predecessors, (8208), 27 states have call successors, (27), 27 states have call predecessors, (27), 97 states have return successors, (413), 71 states have call predecessors, (413), 26 states have call successors, (413) [2023-04-02 19:34:26,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5570 states to 5570 states and 8648 transitions. [2023-04-02 19:34:26,275 INFO L78 Accepts]: Start accepts. Automaton has 5570 states and 8648 transitions. Word has length 41 [2023-04-02 19:34:26,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 19:34:26,275 INFO L495 AbstractCegarLoop]: Abstraction has 5570 states and 8648 transitions. [2023-04-02 19:34:26,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 19:34:26,276 INFO L276 IsEmpty]: Start isEmpty. Operand 5570 states and 8648 transitions. [2023-04-02 19:34:26,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-04-02 19:34:26,279 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 19:34:26,279 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 19:34:26,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-02 19:34:26,279 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 19:34:26,279 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 19:34:26,279 INFO L85 PathProgramCache]: Analyzing trace with hash -727452813, now seen corresponding path program 1 times [2023-04-02 19:34:26,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 19:34:26,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57246621] [2023-04-02 19:34:26,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 19:34:26,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 19:34:26,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 19:34:26,420 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 19:34:26,421 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 19:34:26,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57246621] [2023-04-02 19:34:26,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57246621] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 19:34:26,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617925003] [2023-04-02 19:34:26,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 19:34:26,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 19:34:26,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 19:34:26,425 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 19:34:26,428 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 19:34:26,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 19:34:26,523 INFO L262 TraceCheckSpWp]: Trace formula consists of 452 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-02 19:34:26,528 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 19:34:26,595 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-02 19:34:26,595 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 19:34:26,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617925003] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 19:34:26,595 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 19:34:26,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-04-02 19:34:26,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394510755] [2023-04-02 19:34:26,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 19:34:26,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 19:34:26,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 19:34:26,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 19:34:26,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-04-02 19:34:26,599 INFO L87 Difference]: Start difference. First operand 5570 states and 8648 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 19:34:30,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 19:34:30,150 INFO L93 Difference]: Finished difference Result 16768 states and 27174 transitions. [2023-04-02 19:34:30,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 19:34:30,151 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 42 [2023-04-02 19:34:30,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 19:34:30,192 INFO L225 Difference]: With dead ends: 16768 [2023-04-02 19:34:30,193 INFO L226 Difference]: Without dead ends: 11203 [2023-04-02 19:34:30,207 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-04-02 19:34:30,211 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 2428 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 3486 mSolverCounterSat, 1263 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2428 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 4749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1263 IncrementalHoareTripleChecker+Valid, 3486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2023-04-02 19:34:30,212 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2428 Valid, 73 Invalid, 4749 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1263 Valid, 3486 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2023-04-02 19:34:30,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11203 states. [2023-04-02 19:34:30,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11203 to 9834. [2023-04-02 19:34:30,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9834 states, 9575 states have (on average 1.370130548302872) internal successors, (13119), 9640 states have internal predecessors, (13119), 47 states have call successors, (47), 47 states have call predecessors, (47), 211 states have return successors, (1286), 146 states have call predecessors, (1286), 46 states have call successors, (1286) [2023-04-02 19:34:30,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9834 states to 9834 states and 14452 transitions. [2023-04-02 19:34:30,454 INFO L78 Accepts]: Start accepts. Automaton has 9834 states and 14452 transitions. Word has length 42 [2023-04-02 19:34:30,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 19:34:30,455 INFO L495 AbstractCegarLoop]: Abstraction has 9834 states and 14452 transitions. [2023-04-02 19:34:30,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 19:34:30,455 INFO L276 IsEmpty]: Start isEmpty. Operand 9834 states and 14452 transitions. [2023-04-02 19:34:30,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-04-02 19:34:30,457 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 19:34:30,457 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 19:34:30,466 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-02 19:34:30,665 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 19:34:30,665 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 19:34:30,666 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 19:34:30,666 INFO L85 PathProgramCache]: Analyzing trace with hash -1227905226, now seen corresponding path program 1 times [2023-04-02 19:34:30,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 19:34:30,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798761181] [2023-04-02 19:34:30,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 19:34:30,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 19:34:30,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 19:34:30,814 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 19:34:30,815 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 19:34:30,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798761181] [2023-04-02 19:34:30,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798761181] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 19:34:30,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291925680] [2023-04-02 19:34:30,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 19:34:30,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 19:34:30,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 19:34:30,820 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 19:34:30,838 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 19:34:30,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 19:34:30,923 INFO L262 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-02 19:34:30,926 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 19:34:30,978 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-02 19:34:30,978 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 19:34:30,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291925680] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 19:34:30,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 19:34:30,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-04-02 19:34:30,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719861324] [2023-04-02 19:34:30,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 19:34:30,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 19:34:30,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 19:34:30,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 19:34:30,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-02 19:34:30,980 INFO L87 Difference]: Start difference. First operand 9834 states and 14452 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 19:34:35,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 19:34:35,141 INFO L93 Difference]: Finished difference Result 24791 states and 37431 transitions. [2023-04-02 19:34:35,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 19:34:35,141 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 45 [2023-04-02 19:34:35,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 19:34:35,191 INFO L225 Difference]: With dead ends: 24791 [2023-04-02 19:34:35,192 INFO L226 Difference]: Without dead ends: 14962 [2023-04-02 19:34:35,217 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-04-02 19:34:35,217 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 2040 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 4472 mSolverCounterSat, 973 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2040 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 5445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 973 IncrementalHoareTripleChecker+Valid, 4472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2023-04-02 19:34:35,217 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2040 Valid, 103 Invalid, 5445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [973 Valid, 4472 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2023-04-02 19:34:35,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14962 states. [2023-04-02 19:34:35,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14962 to 14607. [2023-04-02 19:34:35,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14607 states, 14159 states have (on average 1.2818701885726393) internal successors, (18150), 14285 states have internal predecessors, (18150), 68 states have call successors, (68), 68 states have call predecessors, (68), 379 states have return successors, (2708), 253 states have call predecessors, (2708), 67 states have call successors, (2708) [2023-04-02 19:34:35,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14607 states to 14607 states and 20926 transitions. [2023-04-02 19:34:35,544 INFO L78 Accepts]: Start accepts. Automaton has 14607 states and 20926 transitions. Word has length 45 [2023-04-02 19:34:35,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 19:34:35,545 INFO L495 AbstractCegarLoop]: Abstraction has 14607 states and 20926 transitions. [2023-04-02 19:34:35,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 19:34:35,546 INFO L276 IsEmpty]: Start isEmpty. Operand 14607 states and 20926 transitions. [2023-04-02 19:34:35,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-04-02 19:34:35,550 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 19:34:35,550 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 19:34:35,557 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-02 19:34:35,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 19:34:35,757 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 19:34:35,758 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 19:34:35,758 INFO L85 PathProgramCache]: Analyzing trace with hash -1265692171, now seen corresponding path program 1 times [2023-04-02 19:34:35,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 19:34:35,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446460686] [2023-04-02 19:34:35,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 19:34:35,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 19:34:35,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 19:34:35,899 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-04-02 19:34:35,900 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 19:34:35,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446460686] [2023-04-02 19:34:35,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446460686] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 19:34:35,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 19:34:35,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 19:34:35,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623029671] [2023-04-02 19:34:35,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 19:34:35,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 19:34:35,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 19:34:35,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 19:34:35,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 19:34:35,901 INFO L87 Difference]: Start difference. First operand 14607 states and 20926 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-02 19:34:38,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 19:34:38,815 INFO L93 Difference]: Finished difference Result 30621 states and 45209 transitions. [2023-04-02 19:34:38,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 19:34:38,816 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 79 [2023-04-02 19:34:38,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 19:34:38,859 INFO L225 Difference]: With dead ends: 30621 [2023-04-02 19:34:38,860 INFO L226 Difference]: Without dead ends: 16019 [2023-04-02 19:34:38,886 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 19:34:38,886 INFO L413 NwaCegarLoop]: 1160 mSDtfsCounter, 691 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 2182 mSolverCounterSat, 640 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 691 SdHoareTripleChecker+Valid, 1187 SdHoareTripleChecker+Invalid, 2822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 640 IncrementalHoareTripleChecker+Valid, 2182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-04-02 19:34:38,887 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [691 Valid, 1187 Invalid, 2822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [640 Valid, 2182 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2023-04-02 19:34:38,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16019 states. [2023-04-02 19:34:39,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16019 to 15818. [2023-04-02 19:34:39,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15818 states, 15361 states have (on average 1.2357268407004753) internal successors, (18982), 15488 states have internal predecessors, (18982), 73 states have call successors, (73), 73 states have call predecessors, (73), 383 states have return successors, (2724), 256 states have call predecessors, (2724), 72 states have call successors, (2724) [2023-04-02 19:34:39,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15818 states to 15818 states and 21779 transitions. [2023-04-02 19:34:39,147 INFO L78 Accepts]: Start accepts. Automaton has 15818 states and 21779 transitions. Word has length 79 [2023-04-02 19:34:39,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 19:34:39,148 INFO L495 AbstractCegarLoop]: Abstraction has 15818 states and 21779 transitions. [2023-04-02 19:34:39,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-02 19:34:39,148 INFO L276 IsEmpty]: Start isEmpty. Operand 15818 states and 21779 transitions. [2023-04-02 19:34:39,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2023-04-02 19:34:39,150 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 19:34:39,150 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 19:34:39,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-02 19:34:39,150 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 19:34:39,150 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 19:34:39,150 INFO L85 PathProgramCache]: Analyzing trace with hash 97281814, now seen corresponding path program 1 times [2023-04-02 19:34:39,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 19:34:39,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667825563] [2023-04-02 19:34:39,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 19:34:39,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 19:34:39,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 19:34:39,292 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-04-02 19:34:39,292 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 19:34:39,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667825563] [2023-04-02 19:34:39,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667825563] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 19:34:39,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 19:34:39,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 19:34:39,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278249665] [2023-04-02 19:34:39,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 19:34:39,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 19:34:39,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 19:34:39,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 19:34:39,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 19:34:39,295 INFO L87 Difference]: Start difference. First operand 15818 states and 21779 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-02 19:34:42,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 19:34:42,103 INFO L93 Difference]: Finished difference Result 36536 states and 51969 transitions. [2023-04-02 19:34:42,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 19:34:42,110 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 93 [2023-04-02 19:34:42,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 19:34:42,165 INFO L225 Difference]: With dead ends: 36536 [2023-04-02 19:34:42,165 INFO L226 Difference]: Without dead ends: 20723 [2023-04-02 19:34:42,192 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 19:34:42,193 INFO L413 NwaCegarLoop]: 1235 mSDtfsCounter, 677 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 2250 mSolverCounterSat, 538 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 677 SdHoareTripleChecker+Valid, 1263 SdHoareTripleChecker+Invalid, 2788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 538 IncrementalHoareTripleChecker+Valid, 2250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-04-02 19:34:42,193 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [677 Valid, 1263 Invalid, 2788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [538 Valid, 2250 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-04-02 19:34:42,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20723 states. [2023-04-02 19:34:42,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20723 to 20559. [2023-04-02 19:34:42,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20559 states, 19994 states have (on average 1.2070121036310892) internal successors, (24133), 20152 states have internal predecessors, (24133), 94 states have call successors, (94), 94 states have call predecessors, (94), 470 states have return successors, (3808), 312 states have call predecessors, (3808), 93 states have call successors, (3808) [2023-04-02 19:34:42,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20559 states to 20559 states and 28035 transitions. [2023-04-02 19:34:42,724 INFO L78 Accepts]: Start accepts. Automaton has 20559 states and 28035 transitions. Word has length 93 [2023-04-02 19:34:42,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 19:34:42,730 INFO L495 AbstractCegarLoop]: Abstraction has 20559 states and 28035 transitions. [2023-04-02 19:34:42,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-02 19:34:42,733 INFO L276 IsEmpty]: Start isEmpty. Operand 20559 states and 28035 transitions. [2023-04-02 19:34:42,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-04-02 19:34:42,736 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 19:34:42,736 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2023-04-02 19:34:42,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-02 19:34:42,736 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 19:34:42,738 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 19:34:42,738 INFO L85 PathProgramCache]: Analyzing trace with hash -51241598, now seen corresponding path program 1 times [2023-04-02 19:34:42,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 19:34:42,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869564689] [2023-04-02 19:34:42,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 19:34:42,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 19:34:42,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 19:34:42,896 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 75 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-04-02 19:34:42,897 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 19:34:42,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869564689] [2023-04-02 19:34:42,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869564689] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 19:34:42,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550311654] [2023-04-02 19:34:42,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 19:34:42,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 19:34:42,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 19:34:42,898 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 19:34:42,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-02 19:34:43,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 19:34:43,021 INFO L262 TraceCheckSpWp]: Trace formula consists of 712 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-02 19:34:43,028 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 19:34:43,075 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 75 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-04-02 19:34:43,076 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 19:34:43,176 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 75 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-04-02 19:34:43,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550311654] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 19:34:43,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [634742494] [2023-04-02 19:34:43,195 INFO L159 IcfgInterpreter]: Started Sifa with 41 locations of interest [2023-04-02 19:34:43,195 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 19:34:43,198 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 19:34:43,201 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 19:34:43,202 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 19:34:43,307 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 49 for LOIs [2023-04-02 19:34:43,491 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 56 [2023-04-02 19:34:52,278 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 145310 conjuctions. This might take some time... [2023-04-02 19:35:00,555 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 226 conjuctions. [2023-04-02 19:35:03,471 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 70176 conjuctions. This might take some time... [2023-04-02 19:35:56,216 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 11352 conjuctions. [2023-04-02 19:36:31,084 WARN L223 SmtUtils]: Spent 34.39s on a formula simplification that was a NOOP. DAG size: 1636 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm)