/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/eca-rers2012/Problem19_label54.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 20:43:24,662 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 20:43:24,665 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 20:43:24,698 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 20:43:24,698 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 20:43:24,699 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 20:43:24,700 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 20:43:24,704 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 20:43:24,705 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 20:43:24,705 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 20:43:24,706 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 20:43:24,707 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 20:43:24,707 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 20:43:24,707 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 20:43:24,708 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 20:43:24,709 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 20:43:24,709 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 20:43:24,710 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 20:43:24,711 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 20:43:24,712 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 20:43:24,713 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 20:43:24,714 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 20:43:24,715 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 20:43:24,716 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 20:43:24,719 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-02 20:43:24,719 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-02 20:43:24,719 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-02 20:43:24,720 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-02 20:43:24,720 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-02 20:43:24,721 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-02 20:43:24,721 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 20:43:24,721 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 20:43:24,722 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 20:43:24,722 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 20:43:24,723 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 20:43:24,723 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 20:43:24,723 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 20:43:24,724 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 20:43:24,724 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 20:43:24,724 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 20:43:24,725 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 20:43:24,725 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 20:43:24,744 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 20:43:24,745 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 20:43:24,745 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 20:43:24,745 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 20:43:24,745 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 20:43:24,746 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 20:43:24,746 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 20:43:24,746 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 20:43:24,746 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 20:43:24,746 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 20:43:24,746 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 20:43:24,746 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 20:43:24,746 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 20:43:24,746 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 20:43:24,746 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 20:43:24,746 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 20:43:24,746 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 20:43:24,747 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 20:43:24,747 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 20:43:24,747 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 20:43:24,747 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 20:43:24,747 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 20:43:24,747 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 20:43:24,747 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 20:43:24,747 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 20:43:24,747 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 20:43:24,748 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 20:43:24,748 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 20:43:24,748 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 20:43:24,748 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 20:43:24,748 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 20:43:24,748 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 20:43:24,748 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 20:43:24,748 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 20:43:24,748 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 20:43:24,748 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 20:43:24,748 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 20:43:24,749 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 20:43:24,749 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 20:43:24,749 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 20:43:24,749 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 20:43:24,749 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 20:43:24,925 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 20:43:24,950 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 20:43:24,951 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 20:43:24,952 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 20:43:24,953 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 20:43:24,954 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem19_label54.c [2023-04-02 20:43:26,006 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 20:43:26,468 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 20:43:26,469 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem19_label54.c [2023-04-02 20:43:26,510 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1820dfbc5/5f963270cb09475d9534f1c96416672b/FLAGa9c69e86b [2023-04-02 20:43:26,525 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1820dfbc5/5f963270cb09475d9534f1c96416672b [2023-04-02 20:43:26,528 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 20:43:26,530 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 20:43:26,534 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 20:43:26,534 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 20:43:26,537 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 20:43:26,538 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 08:43:26" (1/1) ... [2023-04-02 20:43:26,539 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6775adb5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:43:26, skipping insertion in model container [2023-04-02 20:43:26,539 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 08:43:26" (1/1) ... [2023-04-02 20:43:26,546 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 20:43:26,702 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 20:43:27,018 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem19_label54.c[8269,8282] [2023-04-02 20:43:27,867 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 20:43:27,879 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 20:43:27,903 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem19_label54.c[8269,8282] [2023-04-02 20:43:28,482 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 20:43:28,513 INFO L208 MainTranslator]: Completed translation [2023-04-02 20:43:28,514 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:43:28 WrapperNode [2023-04-02 20:43:28,514 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 20:43:28,514 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 20:43:28,515 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 20:43:28,515 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 20:43:28,524 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:43:28" (1/1) ... [2023-04-02 20:43:28,525 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:43:28" (1/1) ... [2023-04-02 20:43:28,599 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:43:28" (1/1) ... [2023-04-02 20:43:28,600 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:43:28" (1/1) ... [2023-04-02 20:43:28,782 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:43:28" (1/1) ... [2023-04-02 20:43:28,810 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:43:28" (1/1) ... [2023-04-02 20:43:28,860 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:43:28" (1/1) ... [2023-04-02 20:43:28,915 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:43:28" (1/1) ... [2023-04-02 20:43:29,001 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 20:43:29,003 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 20:43:29,004 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 20:43:29,004 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 20:43:29,005 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:43:28" (1/1) ... [2023-04-02 20:43:29,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 20:43:29,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 20:43:29,034 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 20:43:29,041 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 20:43:29,066 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 20:43:29,066 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 20:43:29,066 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 20:43:29,066 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-02 20:43:29,066 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-02 20:43:29,066 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-04-02 20:43:29,067 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-04-02 20:43:29,067 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2023-04-02 20:43:29,067 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2023-04-02 20:43:29,067 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 20:43:29,067 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-02 20:43:29,067 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-02 20:43:29,067 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-04-02 20:43:29,067 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-04-02 20:43:29,067 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2023-04-02 20:43:29,067 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2023-04-02 20:43:29,067 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 20:43:29,067 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 20:43:29,068 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 20:43:29,068 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 20:43:29,068 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-02 20:43:29,068 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-02 20:43:29,068 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 20:43:29,068 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 20:43:29,068 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 20:43:29,068 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 20:43:29,068 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 20:43:29,068 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 20:43:29,068 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 20:43:29,150 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 20:43:29,152 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 20:43:35,099 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 20:43:48,983 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 20:43:48,984 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-02 20:43:48,988 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 08:43:48 BoogieIcfgContainer [2023-04-02 20:43:48,989 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 20:43:48,991 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 20:43:48,991 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 20:43:48,993 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 20:43:48,994 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 08:43:26" (1/3) ... [2023-04-02 20:43:48,994 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6329506f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 08:43:48, skipping insertion in model container [2023-04-02 20:43:48,994 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:43:28" (2/3) ... [2023-04-02 20:43:48,995 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6329506f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 08:43:48, skipping insertion in model container [2023-04-02 20:43:48,995 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 08:43:48" (3/3) ... [2023-04-02 20:43:48,996 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem19_label54.c [2023-04-02 20:43:49,011 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 20:43:49,011 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 20:43:49,076 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 20:43:49,081 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;@6709001e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 20:43:49,081 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 20:43:49,087 INFO L276 IsEmpty]: Start isEmpty. Operand has 1144 states, 1126 states have (on average 1.980461811722913) internal successors, (2230), 1127 states have internal predecessors, (2230), 8 states have call successors, (8), 8 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-04-02 20:43:49,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-02 20:43:49,092 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 20:43:49,093 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 20:43:49,093 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 20:43:49,098 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 20:43:49,098 INFO L85 PathProgramCache]: Analyzing trace with hash 1432420292, now seen corresponding path program 1 times [2023-04-02 20:43:49,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 20:43:49,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631109458] [2023-04-02 20:43:49,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 20:43:49,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 20:43:49,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 20:43:49,403 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 20:43:49,404 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 20:43:49,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631109458] [2023-04-02 20:43:49,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631109458] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 20:43:49,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 20:43:49,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 20:43:49,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439534036] [2023-04-02 20:43:49,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 20:43:49,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 20:43:49,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 20:43:49,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 20:43:49,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 20:43:49,446 INFO L87 Difference]: Start difference. First operand has 1144 states, 1126 states have (on average 1.980461811722913) internal successors, (2230), 1127 states have internal predecessors, (2230), 8 states have call successors, (8), 8 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 20:43:54,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 20:43:54,906 INFO L93 Difference]: Finished difference Result 3418 states and 6741 transitions. [2023-04-02 20:43:54,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 20:43:54,916 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 20:43:54,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 20:43:54,942 INFO L225 Difference]: With dead ends: 3418 [2023-04-02 20:43:54,942 INFO L226 Difference]: Without dead ends: 2271 [2023-04-02 20:43:54,949 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 20:43:54,951 INFO L413 NwaCegarLoop]: 204 mSDtfsCounter, 1292 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 3267 mSolverCounterSat, 1820 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1292 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 5087 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1820 IncrementalHoareTripleChecker+Valid, 3267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2023-04-02 20:43:54,952 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1292 Valid, 239 Invalid, 5087 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1820 Valid, 3267 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2023-04-02 20:43:54,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2271 states. [2023-04-02 20:43:55,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2271 to 2265. [2023-04-02 20:43:55,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2265 states, 2239 states have (on average 1.9004019651630193) internal successors, (4255), 2239 states have internal predecessors, (4255), 13 states have call successors, (13), 13 states have call predecessors, (13), 12 states have return successors, (22), 12 states have call predecessors, (22), 12 states have call successors, (22) [2023-04-02 20:43:55,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2265 states to 2265 states and 4290 transitions. [2023-04-02 20:43:55,099 INFO L78 Accepts]: Start accepts. Automaton has 2265 states and 4290 transitions. Word has length 11 [2023-04-02 20:43:55,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 20:43:55,100 INFO L495 AbstractCegarLoop]: Abstraction has 2265 states and 4290 transitions. [2023-04-02 20:43:55,100 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 20:43:55,100 INFO L276 IsEmpty]: Start isEmpty. Operand 2265 states and 4290 transitions. [2023-04-02 20:43:55,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-04-02 20:43:55,102 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 20:43:55,102 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] [2023-04-02 20:43:55,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 20:43:55,102 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 20:43:55,103 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 20:43:55,103 INFO L85 PathProgramCache]: Analyzing trace with hash 1372311369, now seen corresponding path program 1 times [2023-04-02 20:43:55,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 20:43:55,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838862655] [2023-04-02 20:43:55,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 20:43:55,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 20:43:55,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 20:43:55,336 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 20:43:55,336 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 20:43:55,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838862655] [2023-04-02 20:43:55,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838862655] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 20:43:55,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 20:43:55,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 20:43:55,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480023703] [2023-04-02 20:43:55,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 20:43:55,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 20:43:55,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 20:43:55,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 20:43:55,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-02 20:43:55,339 INFO L87 Difference]: Start difference. First operand 2265 states and 4290 transitions. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 4 states have internal predecessors, (41), 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 20:44:04,851 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-04-02 20:44:05,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 20:44:05,137 INFO L93 Difference]: Finished difference Result 6873 states and 13056 transitions. [2023-04-02 20:44:05,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 20:44:05,137 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 4 states have internal predecessors, (41), 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 47 [2023-04-02 20:44:05,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 20:44:05,154 INFO L225 Difference]: With dead ends: 6873 [2023-04-02 20:44:05,154 INFO L226 Difference]: Without dead ends: 4613 [2023-04-02 20:44:05,157 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 20:44:05,158 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 3698 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 7246 mSolverCounterSat, 1323 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3698 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 8570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1323 IncrementalHoareTripleChecker+Valid, 7246 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.6s IncrementalHoareTripleChecker+Time [2023-04-02 20:44:05,159 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3698 Valid, 139 Invalid, 8570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1323 Valid, 7246 Invalid, 1 Unknown, 0 Unchecked, 9.6s Time] [2023-04-02 20:44:05,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4613 states. [2023-04-02 20:44:05,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4613 to 4575. [2023-04-02 20:44:05,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4575 states, 4509 states have (on average 1.5917054779330229) internal successors, (7177), 4513 states have internal predecessors, (7177), 23 states have call successors, (23), 23 states have call predecessors, (23), 42 states have return successors, (122), 38 states have call predecessors, (122), 22 states have call successors, (122) [2023-04-02 20:44:05,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4575 states to 4575 states and 7322 transitions. [2023-04-02 20:44:05,252 INFO L78 Accepts]: Start accepts. Automaton has 4575 states and 7322 transitions. Word has length 47 [2023-04-02 20:44:05,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 20:44:05,253 INFO L495 AbstractCegarLoop]: Abstraction has 4575 states and 7322 transitions. [2023-04-02 20:44:05,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 4 states have internal predecessors, (41), 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 20:44:05,253 INFO L276 IsEmpty]: Start isEmpty. Operand 4575 states and 7322 transitions. [2023-04-02 20:44:05,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-04-02 20:44:05,256 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 20:44:05,256 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 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, 1, 1, 1] [2023-04-02 20:44:05,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-02 20:44:05,257 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 20:44:05,257 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 20:44:05,257 INFO L85 PathProgramCache]: Analyzing trace with hash -169026185, now seen corresponding path program 1 times [2023-04-02 20:44:05,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 20:44:05,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453980686] [2023-04-02 20:44:05,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 20:44:05,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 20:44:05,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 20:44:05,486 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 20:44:05,486 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 20:44:05,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453980686] [2023-04-02 20:44:05,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453980686] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 20:44:05,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391054974] [2023-04-02 20:44:05,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 20:44:05,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 20:44:05,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 20:44:05,491 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 20:44:05,494 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 20:44:05,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 20:44:05,597 INFO L262 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-02 20:44:05,602 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 20:44:05,656 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-02 20:44:05,657 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 20:44:05,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391054974] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 20:44:05,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 20:44:05,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-04-02 20:44:05,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082459486] [2023-04-02 20:44:05,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 20:44:05,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 20:44:05,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 20:44:05,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 20:44:05,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-04-02 20:44:05,659 INFO L87 Difference]: Start difference. First operand 4575 states and 7322 transitions. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 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 20:44:12,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 20:44:12,674 INFO L93 Difference]: Finished difference Result 14085 states and 22931 transitions. [2023-04-02 20:44:12,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-02 20:44:12,676 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 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 57 [2023-04-02 20:44:12,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 20:44:12,709 INFO L225 Difference]: With dead ends: 14085 [2023-04-02 20:44:12,709 INFO L226 Difference]: Without dead ends: 9515 [2023-04-02 20:44:12,717 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-04-02 20:44:12,718 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 4043 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 5945 mSolverCounterSat, 2439 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4043 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 8384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2439 IncrementalHoareTripleChecker+Valid, 5945 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2023-04-02 20:44:12,718 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4043 Valid, 157 Invalid, 8384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2439 Valid, 5945 Invalid, 0 Unknown, 0 Unchecked, 6.7s Time] [2023-04-02 20:44:12,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9515 states. [2023-04-02 20:44:12,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9515 to 9355. [2023-04-02 20:44:12,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9355 states, 9149 states have (on average 1.3785113127117719) internal successors, (12612), 9177 states have internal predecessors, (12612), 43 states have call successors, (43), 43 states have call predecessors, (43), 162 states have return successors, (619), 134 states have call predecessors, (619), 42 states have call successors, (619) [2023-04-02 20:44:12,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9355 states to 9355 states and 13274 transitions. [2023-04-02 20:44:12,939 INFO L78 Accepts]: Start accepts. Automaton has 9355 states and 13274 transitions. Word has length 57 [2023-04-02 20:44:12,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 20:44:12,939 INFO L495 AbstractCegarLoop]: Abstraction has 9355 states and 13274 transitions. [2023-04-02 20:44:12,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 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 20:44:12,939 INFO L276 IsEmpty]: Start isEmpty. Operand 9355 states and 13274 transitions. [2023-04-02 20:44:12,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-04-02 20:44:12,945 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 20:44:12,945 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 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 20:44:12,961 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 20:44:13,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 20:44:13,161 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 20:44:13,162 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 20:44:13,162 INFO L85 PathProgramCache]: Analyzing trace with hash 620225737, now seen corresponding path program 1 times [2023-04-02 20:44:13,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 20:44:13,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963476507] [2023-04-02 20:44:13,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 20:44:13,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 20:44:13,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 20:44:13,388 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 15 proven. 16 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-04-02 20:44:13,389 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 20:44:13,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963476507] [2023-04-02 20:44:13,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963476507] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 20:44:13,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383677421] [2023-04-02 20:44:13,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 20:44:13,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 20:44:13,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 20:44:13,392 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 20:44:13,395 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 20:44:13,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 20:44:13,509 INFO L262 TraceCheckSpWp]: Trace formula consists of 584 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-02 20:44:13,512 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 20:44:13,565 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-04-02 20:44:13,565 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 20:44:13,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383677421] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 20:44:13,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 20:44:13,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-04-02 20:44:13,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25988768] [2023-04-02 20:44:13,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 20:44:13,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 20:44:13,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 20:44:13,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 20:44:13,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-02 20:44:13,567 INFO L87 Difference]: Start difference. First operand 9355 states and 13274 transitions. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 states have internal predecessors, (48), 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 20:44:20,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 20:44:20,121 INFO L93 Difference]: Finished difference Result 28531 states and 42490 transitions. [2023-04-02 20:44:20,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 20:44:20,122 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 states have internal predecessors, (48), 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 72 [2023-04-02 20:44:20,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 20:44:20,183 INFO L225 Difference]: With dead ends: 28531 [2023-04-02 20:44:20,183 INFO L226 Difference]: Without dead ends: 19181 [2023-04-02 20:44:20,203 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-04-02 20:44:20,204 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 3497 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 6928 mSolverCounterSat, 1512 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3497 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 8440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1512 IncrementalHoareTripleChecker+Valid, 6928 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2023-04-02 20:44:20,205 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3497 Valid, 148 Invalid, 8440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1512 Valid, 6928 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time] [2023-04-02 20:44:20,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19181 states. [2023-04-02 20:44:20,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19181 to 17066. [2023-04-02 20:44:20,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17066 states, 16583 states have (on average 1.3867816438521376) internal successors, (22997), 16665 states have internal predecessors, (22997), 77 states have call successors, (77), 77 states have call predecessors, (77), 405 states have return successors, (2379), 323 states have call predecessors, (2379), 76 states have call successors, (2379) [2023-04-02 20:44:20,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17066 states to 17066 states and 25453 transitions. [2023-04-02 20:44:20,565 INFO L78 Accepts]: Start accepts. Automaton has 17066 states and 25453 transitions. Word has length 72 [2023-04-02 20:44:20,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 20:44:20,567 INFO L495 AbstractCegarLoop]: Abstraction has 17066 states and 25453 transitions. [2023-04-02 20:44:20,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 states have internal predecessors, (48), 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 20:44:20,571 INFO L276 IsEmpty]: Start isEmpty. Operand 17066 states and 25453 transitions. [2023-04-02 20:44:20,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2023-04-02 20:44:20,577 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 20:44:20,577 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1] [2023-04-02 20:44:20,585 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 20:44:20,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-04-02 20:44:20,783 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 20:44:20,784 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 20:44:20,784 INFO L85 PathProgramCache]: Analyzing trace with hash 355489989, now seen corresponding path program 1 times [2023-04-02 20:44:20,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 20:44:20,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141027667] [2023-04-02 20:44:20,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 20:44:20,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 20:44:20,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 20:44:20,976 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-04-02 20:44:20,976 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 20:44:20,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141027667] [2023-04-02 20:44:20,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141027667] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 20:44:20,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434668846] [2023-04-02 20:44:20,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 20:44:20,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 20:44:20,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 20:44:20,977 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 20:44:20,979 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 20:44:21,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 20:44:21,082 INFO L262 TraceCheckSpWp]: Trace formula consists of 608 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-02 20:44:21,085 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 20:44:21,138 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-04-02 20:44:21,138 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 20:44:21,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434668846] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 20:44:21,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 20:44:21,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-04-02 20:44:21,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395031752] [2023-04-02 20:44:21,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 20:44:21,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 20:44:21,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 20:44:21,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 20:44:21,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-04-02 20:44:21,139 INFO L87 Difference]: Start difference. First operand 17066 states and 25453 transitions. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 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 20:44:28,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 20:44:28,323 INFO L93 Difference]: Finished difference Result 51435 states and 79548 transitions. [2023-04-02 20:44:28,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 20:44:28,326 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 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 91 [2023-04-02 20:44:28,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 20:44:28,433 INFO L225 Difference]: With dead ends: 51435 [2023-04-02 20:44:28,433 INFO L226 Difference]: Without dead ends: 34374 [2023-04-02 20:44:28,470 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-04-02 20:44:28,471 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 5990 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 6260 mSolverCounterSat, 906 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5990 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 7166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 906 IncrementalHoareTripleChecker+Valid, 6260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2023-04-02 20:44:28,471 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5990 Valid, 125 Invalid, 7166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [906 Valid, 6260 Invalid, 0 Unknown, 0 Unchecked, 6.8s Time] [2023-04-02 20:44:28,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34374 states. [2023-04-02 20:44:29,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34374 to 30286. [2023-04-02 20:44:29,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30286 states, 29289 states have (on average 1.3651882959472839) internal successors, (39985), 29477 states have internal predecessors, (39985), 134 states have call successors, (134), 134 states have call predecessors, (134), 862 states have return successors, (4931), 674 states have call predecessors, (4931), 133 states have call successors, (4931) [2023-04-02 20:44:29,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30286 states to 30286 states and 45050 transitions. [2023-04-02 20:44:29,173 INFO L78 Accepts]: Start accepts. Automaton has 30286 states and 45050 transitions. Word has length 91 [2023-04-02 20:44:29,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 20:44:29,173 INFO L495 AbstractCegarLoop]: Abstraction has 30286 states and 45050 transitions. [2023-04-02 20:44:29,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 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 20:44:29,173 INFO L276 IsEmpty]: Start isEmpty. Operand 30286 states and 45050 transitions. [2023-04-02 20:44:29,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-04-02 20:44:29,174 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 20:44:29,174 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, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 20:44:29,183 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-02 20:44:29,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 20:44:29,384 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 20:44:29,384 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 20:44:29,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1803006760, now seen corresponding path program 1 times [2023-04-02 20:44:29,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 20:44:29,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484471998] [2023-04-02 20:44:29,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 20:44:29,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 20:44:29,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 20:44:29,547 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 10 proven. 35 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 20:44:29,547 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 20:44:29,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484471998] [2023-04-02 20:44:29,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484471998] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 20:44:29,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312111285] [2023-04-02 20:44:29,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 20:44:29,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 20:44:29,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 20:44:29,548 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 20:44:29,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-02 20:44:29,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 20:44:29,641 INFO L262 TraceCheckSpWp]: Trace formula consists of 506 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-02 20:44:29,642 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 20:44:29,718 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-02 20:44:29,718 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 20:44:29,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312111285] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 20:44:29,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 20:44:29,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-04-02 20:44:29,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750574649] [2023-04-02 20:44:29,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 20:44:29,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 20:44:29,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 20:44:29,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 20:44:29,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-04-02 20:44:29,720 INFO L87 Difference]: Start difference. First operand 30286 states and 45050 transitions. Second operand has 5 states, 5 states have (on average 16.6) internal successors, (83), 4 states have internal predecessors, (83), 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 20:44:37,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 20:44:37,600 INFO L93 Difference]: Finished difference Result 79202 states and 124875 transitions. [2023-04-02 20:44:37,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-02 20:44:37,601 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 4 states have internal predecessors, (83), 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 95 [2023-04-02 20:44:37,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 20:44:37,767 INFO L225 Difference]: With dead ends: 79202 [2023-04-02 20:44:37,768 INFO L226 Difference]: Without dead ends: 48921 [2023-04-02 20:44:37,837 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-04-02 20:44:37,838 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 3506 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 5998 mSolverCounterSat, 3158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3506 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 9156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3158 IncrementalHoareTripleChecker+Valid, 5998 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2023-04-02 20:44:37,839 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3506 Valid, 133 Invalid, 9156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3158 Valid, 5998 Invalid, 0 Unknown, 0 Unchecked, 7.2s Time] [2023-04-02 20:44:37,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48921 states. [2023-04-02 20:44:38,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48921 to 46959. [2023-04-02 20:44:38,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46959 states, 45288 states have (on average 1.2980701289524819) internal successors, (58787), 45630 states have internal predecessors, (58787), 202 states have call successors, (202), 202 states have call predecessors, (202), 1468 states have return successors, (9640), 1126 states have call predecessors, (9640), 201 states have call successors, (9640) [2023-04-02 20:44:38,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46959 states to 46959 states and 68629 transitions. [2023-04-02 20:44:38,904 INFO L78 Accepts]: Start accepts. Automaton has 46959 states and 68629 transitions. Word has length 95 [2023-04-02 20:44:38,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 20:44:38,905 INFO L495 AbstractCegarLoop]: Abstraction has 46959 states and 68629 transitions. [2023-04-02 20:44:38,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 4 states have internal predecessors, (83), 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 20:44:38,905 INFO L276 IsEmpty]: Start isEmpty. Operand 46959 states and 68629 transitions. [2023-04-02 20:44:38,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2023-04-02 20:44:38,912 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 20:44:38,912 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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, 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 20:44:38,920 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-02 20:44:39,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 20:44:39,119 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 20:44:39,119 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 20:44:39,119 INFO L85 PathProgramCache]: Analyzing trace with hash 980750186, now seen corresponding path program 1 times [2023-04-02 20:44:39,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 20:44:39,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394198651] [2023-04-02 20:44:39,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 20:44:39,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 20:44:39,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 20:44:39,464 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 74 proven. 61 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2023-04-02 20:44:39,465 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 20:44:39,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394198651] [2023-04-02 20:44:39,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394198651] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 20:44:39,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904993426] [2023-04-02 20:44:39,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 20:44:39,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 20:44:39,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 20:44:39,466 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 20:44:39,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-02 20:44:40,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 20:44:40,011 INFO L262 TraceCheckSpWp]: Trace formula consists of 997 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-02 20:44:40,017 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 20:44:40,078 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 180 proven. 2 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2023-04-02 20:44:40,078 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 20:44:40,227 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 74 proven. 61 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2023-04-02 20:44:40,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904993426] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 20:44:40,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1326846262] [2023-04-02 20:44:40,249 INFO L159 IcfgInterpreter]: Started Sifa with 171 locations of interest [2023-04-02 20:44:40,250 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 20:44:40,252 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 20:44:40,255 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 20:44:40,256 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 20:44:40,376 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 56 for LOIs [2023-04-02 20:44:40,792 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 58 [2023-04-02 20:45:13,539 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 281706 conjuctions. This might take some time... [2023-04-02 20:45:45,511 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 718 conjuctions. [2023-04-02 20:45:53,096 WARN L223 SmtUtils]: Spent 5.43s on a formula simplification that was a NOOP. DAG size: 679 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm)