/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/Problem18_label43.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 04:28:15,896 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 04:28:15,898 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 04:28:15,918 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 04:28:15,918 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 04:28:15,919 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 04:28:15,920 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 04:28:15,921 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 04:28:15,922 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 04:28:15,923 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 04:28:15,923 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 04:28:15,924 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 04:28:15,924 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 04:28:15,925 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 04:28:15,925 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 04:28:15,926 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 04:28:15,927 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 04:28:15,927 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 04:28:15,928 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 04:28:15,929 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 04:28:15,930 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 04:28:15,931 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 04:28:15,932 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 04:28:15,933 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 04:28:15,935 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 04:28:15,935 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 04:28:15,935 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 04:28:15,936 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 04:28:15,936 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 04:28:15,937 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 04:28:15,937 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 04:28:15,938 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 04:28:15,938 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 04:28:15,939 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 04:28:15,939 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 04:28:15,940 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 04:28:15,940 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 04:28:15,940 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 04:28:15,940 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 04:28:15,941 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 04:28:15,941 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 04:28:15,953 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 04:28:15,968 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 04:28:15,968 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 04:28:15,968 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 04:28:15,968 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 04:28:15,969 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 04:28:15,969 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 04:28:15,969 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 04:28:15,969 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 04:28:15,969 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 04:28:15,969 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 04:28:15,969 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 04:28:15,970 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 04:28:15,970 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 04:28:15,970 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 04:28:15,970 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 04:28:15,970 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 04:28:15,970 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 04:28:15,970 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 04:28:15,971 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 04:28:15,971 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 04:28:15,971 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 04:28:15,971 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 04:28:15,971 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 04:28:15,971 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 04:28:15,971 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 04:28:15,971 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 04:28:15,971 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 04:28:15,971 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 04:28:15,972 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 04:28:15,972 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 04:28:15,972 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 04:28:15,972 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 04:28:15,972 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:28:15,972 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 04:28:15,972 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 04:28:15,972 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 04:28:15,972 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 04:28:15,972 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 04:28:15,972 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 04:28:15,973 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 04:28:15,973 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 04:28:15,973 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 04:28:16,119 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 04:28:16,144 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 04:28:16,145 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 04:28:16,147 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 04:28:16,147 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 04:28:16,148 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem18_label43.c [2023-04-01 04:28:17,435 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 04:28:17,752 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 04:28:17,752 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem18_label43.c [2023-04-01 04:28:17,770 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/20201720b/e98b9823cbf742cb96223e228b2c763b/FLAGe07afabf9 [2023-04-01 04:28:17,780 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/20201720b/e98b9823cbf742cb96223e228b2c763b [2023-04-01 04:28:17,782 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 04:28:17,784 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 04:28:17,784 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 04:28:17,785 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 04:28:17,787 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 04:28:17,788 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:28:17" (1/1) ... [2023-04-01 04:28:17,788 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76013219 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:28:17, skipping insertion in model container [2023-04-01 04:28:17,789 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:28:17" (1/1) ... [2023-04-01 04:28:17,793 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 04:28:17,866 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 04:28:18,110 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/Problem18_label43.c[6843,6856] [2023-04-01 04:28:18,608 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:28:18,622 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 04:28:18,644 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/Problem18_label43.c[6843,6856] [2023-04-01 04:28:18,894 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:28:18,910 INFO L208 MainTranslator]: Completed translation [2023-04-01 04:28:18,911 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:28:18 WrapperNode [2023-04-01 04:28:18,911 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 04:28:18,912 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 04:28:18,912 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 04:28:18,912 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 04:28:18,920 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:28:18" (1/1) ... [2023-04-01 04:28:18,920 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:28:18" (1/1) ... [2023-04-01 04:28:18,967 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:28:18" (1/1) ... [2023-04-01 04:28:18,967 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:28:18" (1/1) ... [2023-04-01 04:28:19,027 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:28:18" (1/1) ... [2023-04-01 04:28:19,048 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:28:18" (1/1) ... [2023-04-01 04:28:19,059 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:28:18" (1/1) ... [2023-04-01 04:28:19,068 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:28:18" (1/1) ... [2023-04-01 04:28:19,081 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 04:28:19,082 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 04:28:19,082 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 04:28:19,083 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 04:28:19,084 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:28:18" (1/1) ... [2023-04-01 04:28:19,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:28:19,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:28:19,107 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 04:28:19,130 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 04:28:19,146 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 04:28:19,146 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 04:28:19,146 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 04:28:19,146 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 04:28:19,146 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 04:28:19,146 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-04-01 04:28:19,146 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 04:28:19,146 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 04:28:19,146 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 04:28:19,146 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-04-01 04:28:19,146 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 04:28:19,146 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 04:28:19,147 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 04:28:19,147 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 04:28:19,147 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 04:28:19,147 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 04:28:19,147 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 04:28:19,147 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 04:28:19,147 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 04:28:19,147 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 04:28:19,147 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 04:28:19,147 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 04:28:19,147 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 04:28:19,218 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 04:28:19,219 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 04:28:21,646 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 04:28:27,985 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 04:28:27,985 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 04:28:27,989 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:28:27 BoogieIcfgContainer [2023-04-01 04:28:27,989 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 04:28:27,992 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 04:28:27,992 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 04:28:27,996 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 04:28:28,003 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 04:28:17" (1/3) ... [2023-04-01 04:28:28,004 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63ed0b42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:28:28, skipping insertion in model container [2023-04-01 04:28:28,004 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:28:18" (2/3) ... [2023-04-01 04:28:28,004 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63ed0b42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:28:28, skipping insertion in model container [2023-04-01 04:28:28,004 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:28:27" (3/3) ... [2023-04-01 04:28:28,007 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem18_label43.c [2023-04-01 04:28:28,024 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 04:28:28,024 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 04:28:28,078 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 04:28:28,083 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;@29fecec1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 04:28:28,083 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 04:28:28,089 INFO L276 IsEmpty]: Start isEmpty. Operand has 468 states, 456 states have (on average 1.9736842105263157) internal successors, (900), 457 states have internal predecessors, (900), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-01 04:28:28,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 04:28:28,095 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:28:28,095 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:28:28,095 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:28:28,099 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:28:28,099 INFO L85 PathProgramCache]: Analyzing trace with hash 314331684, now seen corresponding path program 1 times [2023-04-01 04:28:28,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:28:28,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018178185] [2023-04-01 04:28:28,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:28:28,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:28:28,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:28:28,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:28:28,323 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:28:28,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018178185] [2023-04-01 04:28:28,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018178185] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:28:28,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:28:28,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 04:28:28,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682107982] [2023-04-01 04:28:28,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:28:28,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:28:28,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:28:28,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:28:28,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:28:28,350 INFO L87 Difference]: Start difference. First operand has 468 states, 456 states have (on average 1.9736842105263157) internal successors, (900), 457 states have internal predecessors, (900), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:28:30,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:28:30,133 INFO L93 Difference]: Finished difference Result 1390 states and 2724 transitions. [2023-04-01 04:28:30,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 04:28:30,135 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-04-01 04:28:30,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:28:30,149 INFO L225 Difference]: With dead ends: 1390 [2023-04-01 04:28:30,149 INFO L226 Difference]: Without dead ends: 919 [2023-04-01 04:28:30,161 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:28:30,163 INFO L413 NwaCegarLoop]: 346 mSDtfsCounter, 471 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 1400 mSolverCounterSat, 373 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 471 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 1773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 373 IncrementalHoareTripleChecker+Valid, 1400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-04-01 04:28:30,164 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [471 Valid, 366 Invalid, 1773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [373 Valid, 1400 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-04-01 04:28:30,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 919 states. [2023-04-01 04:28:30,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 919 to 917. [2023-04-01 04:28:30,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 917 states, 903 states have (on average 1.6223698781838316) internal successors, (1465), 903 states have internal predecessors, (1465), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2023-04-01 04:28:30,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 917 states to 917 states and 1482 transitions. [2023-04-01 04:28:30,234 INFO L78 Accepts]: Start accepts. Automaton has 917 states and 1482 transitions. Word has length 11 [2023-04-01 04:28:30,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:28:30,234 INFO L495 AbstractCegarLoop]: Abstraction has 917 states and 1482 transitions. [2023-04-01 04:28:30,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:28:30,234 INFO L276 IsEmpty]: Start isEmpty. Operand 917 states and 1482 transitions. [2023-04-01 04:28:30,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-01 04:28:30,235 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:28:30,236 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:28:30,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 04:28:30,236 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:28:30,236 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:28:30,237 INFO L85 PathProgramCache]: Analyzing trace with hash 209761036, now seen corresponding path program 1 times [2023-04-01 04:28:30,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:28:30,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006521348] [2023-04-01 04:28:30,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:28:30,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:28:30,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:28:30,377 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:28:30,378 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:28:30,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006521348] [2023-04-01 04:28:30,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006521348] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:28:30,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:28:30,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:28:30,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609287581] [2023-04-01 04:28:30,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:28:30,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:28:30,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:28:30,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:28:30,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:28:30,380 INFO L87 Difference]: Start difference. First operand 917 states and 1482 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:28:33,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:28:33,067 INFO L93 Difference]: Finished difference Result 2791 states and 4539 transitions. [2023-04-01 04:28:33,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 04:28:33,068 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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 21 [2023-04-01 04:28:33,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:28:33,076 INFO L225 Difference]: With dead ends: 2791 [2023-04-01 04:28:33,076 INFO L226 Difference]: Without dead ends: 1879 [2023-04-01 04:28:33,082 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-04-01 04:28:33,086 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 1521 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 3159 mSolverCounterSat, 536 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1521 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 3695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 536 IncrementalHoareTripleChecker+Valid, 3159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-04-01 04:28:33,089 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1521 Valid, 96 Invalid, 3695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [536 Valid, 3159 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-04-01 04:28:33,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1879 states. [2023-04-01 04:28:33,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1879 to 1839. [2023-04-01 04:28:33,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1839 states, 1805 states have (on average 1.4160664819944597) internal successors, (2556), 1812 states have internal predecessors, (2556), 11 states have call successors, (11), 11 states have call predecessors, (11), 22 states have return successors, (54), 15 states have call predecessors, (54), 10 states have call successors, (54) [2023-04-01 04:28:33,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1839 states to 1839 states and 2621 transitions. [2023-04-01 04:28:33,164 INFO L78 Accepts]: Start accepts. Automaton has 1839 states and 2621 transitions. Word has length 21 [2023-04-01 04:28:33,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:28:33,165 INFO L495 AbstractCegarLoop]: Abstraction has 1839 states and 2621 transitions. [2023-04-01 04:28:33,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:28:33,165 INFO L276 IsEmpty]: Start isEmpty. Operand 1839 states and 2621 transitions. [2023-04-01 04:28:33,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-04-01 04:28:33,166 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:28:33,166 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:28:33,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 04:28:33,166 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:28:33,166 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:28:33,167 INFO L85 PathProgramCache]: Analyzing trace with hash 717452613, now seen corresponding path program 1 times [2023-04-01 04:28:33,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:28:33,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564541233] [2023-04-01 04:28:33,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:28:33,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:28:33,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:28:33,304 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 04:28:33,305 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:28:33,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564541233] [2023-04-01 04:28:33,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564541233] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:28:33,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466643533] [2023-04-01 04:28:33,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:28:33,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:28:33,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:28:33,308 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 04:28:33,326 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 04:28:33,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:28:33,418 INFO L262 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 04:28:33,422 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:28:33,517 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 04:28:33,517 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 04:28:33,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466643533] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:28:33,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 04:28:33,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-04-01 04:28:33,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765872793] [2023-04-01 04:28:33,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:28:33,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:28:33,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:28:33,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:28:33,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-01 04:28:33,519 INFO L87 Difference]: Start difference. First operand 1839 states and 2621 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 04:28:35,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:28:35,436 INFO L93 Difference]: Finished difference Result 5603 states and 8131 transitions. [2023-04-01 04:28:35,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 04:28:35,438 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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 30 [2023-04-01 04:28:35,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:28:35,466 INFO L225 Difference]: With dead ends: 5603 [2023-04-01 04:28:35,467 INFO L226 Difference]: Without dead ends: 3769 [2023-04-01 04:28:35,471 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-04-01 04:28:35,486 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 1573 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 2431 mSolverCounterSat, 1024 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1573 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 3455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1024 IncrementalHoareTripleChecker+Valid, 2431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-04-01 04:28:35,487 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1573 Valid, 59 Invalid, 3455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1024 Valid, 2431 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-04-01 04:28:35,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3769 states. [2023-04-01 04:28:35,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3769 to 3650. [2023-04-01 04:28:35,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3650 states, 3565 states have (on average 1.2561009817671809) internal successors, (4478), 3593 states have internal predecessors, (4478), 19 states have call successors, (19), 19 states have call predecessors, (19), 65 states have return successors, (195), 37 states have call predecessors, (195), 18 states have call successors, (195) [2023-04-01 04:28:35,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3650 states to 3650 states and 4692 transitions. [2023-04-01 04:28:35,656 INFO L78 Accepts]: Start accepts. Automaton has 3650 states and 4692 transitions. Word has length 30 [2023-04-01 04:28:35,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:28:35,656 INFO L495 AbstractCegarLoop]: Abstraction has 3650 states and 4692 transitions. [2023-04-01 04:28:35,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 04:28:35,657 INFO L276 IsEmpty]: Start isEmpty. Operand 3650 states and 4692 transitions. [2023-04-01 04:28:35,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-04-01 04:28:35,658 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:28:35,658 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:28:35,674 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 04:28:35,865 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 [2023-04-01 04:28:35,865 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:28:35,866 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:28:35,866 INFO L85 PathProgramCache]: Analyzing trace with hash 1665712293, now seen corresponding path program 1 times [2023-04-01 04:28:35,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:28:35,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272913927] [2023-04-01 04:28:35,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:28:35,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:28:35,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:28:36,145 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:28:36,146 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:28:36,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272913927] [2023-04-01 04:28:36,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272913927] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:28:36,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:28:36,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 04:28:36,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033831220] [2023-04-01 04:28:36,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:28:36,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 04:28:36,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:28:36,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 04:28:36,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-01 04:28:36,150 INFO L87 Difference]: Start difference. First operand 3650 states and 4692 transitions. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 04:28:38,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:28:38,090 INFO L93 Difference]: Finished difference Result 9184 states and 12232 transitions. [2023-04-01 04:28:38,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 04:28:38,090 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 48 [2023-04-01 04:28:38,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:28:38,111 INFO L225 Difference]: With dead ends: 9184 [2023-04-01 04:28:38,111 INFO L226 Difference]: Without dead ends: 5482 [2023-04-01 04:28:38,120 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-01 04:28:38,120 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 537 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 1932 mSolverCounterSat, 1117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 537 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 3049 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1117 IncrementalHoareTripleChecker+Valid, 1932 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-04-01 04:28:38,121 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [537 Valid, 124 Invalid, 3049 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1117 Valid, 1932 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-04-01 04:28:38,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5482 states. [2023-04-01 04:28:38,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5482 to 4361. [2023-04-01 04:28:38,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4361 states, 4256 states have (on average 1.1581296992481203) internal successors, (4929), 4289 states have internal predecessors, (4929), 25 states have call successors, (25), 25 states have call predecessors, (25), 79 states have return successors, (314), 46 states have call predecessors, (314), 24 states have call successors, (314) [2023-04-01 04:28:38,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4361 states to 4361 states and 5268 transitions. [2023-04-01 04:28:38,211 INFO L78 Accepts]: Start accepts. Automaton has 4361 states and 5268 transitions. Word has length 48 [2023-04-01 04:28:38,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:28:38,211 INFO L495 AbstractCegarLoop]: Abstraction has 4361 states and 5268 transitions. [2023-04-01 04:28:38,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 04:28:38,211 INFO L276 IsEmpty]: Start isEmpty. Operand 4361 states and 5268 transitions. [2023-04-01 04:28:38,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2023-04-01 04:28:38,214 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:28:38,214 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, 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] [2023-04-01 04:28:38,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 04:28:38,215 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:28:38,215 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:28:38,215 INFO L85 PathProgramCache]: Analyzing trace with hash -633152263, now seen corresponding path program 1 times [2023-04-01 04:28:38,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:28:38,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416245773] [2023-04-01 04:28:38,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:28:38,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:28:38,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:28:38,349 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 30 proven. 13 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-04-01 04:28:38,350 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:28:38,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416245773] [2023-04-01 04:28:38,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416245773] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:28:38,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718355487] [2023-04-01 04:28:38,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:28:38,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:28:38,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:28:38,356 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 04:28:38,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 04:28:38,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:28:38,537 INFO L262 TraceCheckSpWp]: Trace formula consists of 604 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 04:28:38,540 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:28:38,578 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 61 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 04:28:38,578 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:28:38,669 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 30 proven. 13 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-04-01 04:28:38,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718355487] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 04:28:38,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1378572977] [2023-04-01 04:28:38,689 INFO L159 IcfgInterpreter]: Started Sifa with 69 locations of interest [2023-04-01 04:28:38,690 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 04:28:38,692 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 04:28:38,696 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 04:28:38,696 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 04:28:38,879 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 44 for LOIs [2023-04-01 04:28:39,057 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 60