/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/eca-rers2012/Problem12_label50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 04:02:58,009 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 04:02:58,010 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 04:02:58,037 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 04:02:58,037 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 04:02:58,038 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 04:02:58,039 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 04:02:58,040 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 04:02:58,041 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 04:02:58,053 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 04:02:58,053 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 04:02:58,054 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 04:02:58,054 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 04:02:58,055 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 04:02:58,056 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 04:02:58,056 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 04:02:58,057 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 04:02:58,061 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 04:02:58,063 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 04:02:58,065 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 04:02:58,066 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 04:02:58,068 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 04:02:58,069 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 04:02:58,069 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 04:02:58,071 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 04:02:58,071 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 04:02:58,071 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 04:02:58,072 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 04:02:58,072 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 04:02:58,073 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 04:02:58,073 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 04:02:58,073 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 04:02:58,074 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 04:02:58,074 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 04:02:58,075 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 04:02:58,075 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 04:02:58,075 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 04:02:58,076 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 04:02:58,076 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 04:02:58,076 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 04:02:58,077 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 04:02:58,078 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 04:02:58,091 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 04:02:58,091 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 04:02:58,092 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 04:02:58,092 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 04:02:58,092 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 04:02:58,094 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 04:02:58,094 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 04:02:58,094 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 04:02:58,094 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 04:02:58,095 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 04:02:58,095 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 04:02:58,095 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 04:02:58,095 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 04:02:58,095 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 04:02:58,095 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 04:02:58,095 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 04:02:58,096 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 04:02:58,096 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 04:02:58,096 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 04:02:58,096 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 04:02:58,097 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 04:02:58,097 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 04:02:58,097 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 04:02:58,097 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 04:02:58,097 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 04:02:58,097 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 04:02:58,097 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 04:02:58,097 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 04:02:58,098 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 04:02:58,098 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 04:02:58,098 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 04:02:58,098 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 04:02:58,098 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:02:58,098 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 04:02:58,099 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 04:02:58,099 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 04:02:58,099 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 04:02:58,099 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 04:02:58,099 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 04:02:58,099 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 04:02:58,099 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 04:02:58,099 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 04:02:58,295 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 04:02:58,323 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 04:02:58,325 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 04:02:58,326 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 04:02:58,326 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 04:02:58,327 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem12_label50.c [2023-04-01 04:02:59,513 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 04:02:59,913 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 04:02:59,914 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label50.c [2023-04-01 04:02:59,941 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/632ce7bfb/51b18a9204e94e138c1ab94031d822cb/FLAG4c5f1c844 [2023-04-01 04:02:59,955 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/632ce7bfb/51b18a9204e94e138c1ab94031d822cb [2023-04-01 04:02:59,958 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 04:02:59,960 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 04:02:59,964 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 04:02:59,964 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 04:02:59,966 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 04:02:59,967 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:02:59" (1/1) ... [2023-04-01 04:02:59,968 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16f751e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:02:59, skipping insertion in model container [2023-04-01 04:02:59,969 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:02:59" (1/1) ... [2023-04-01 04:02:59,974 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 04:03:00,106 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 04:03:00,306 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label50.c[2573,2586] [2023-04-01 04:03:00,916 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:03:00,926 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 04:03:00,944 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label50.c[2573,2586] [2023-04-01 04:03:01,288 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:03:01,305 INFO L208 MainTranslator]: Completed translation [2023-04-01 04:03:01,306 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:03:01 WrapperNode [2023-04-01 04:03:01,306 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 04:03:01,307 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 04:03:01,307 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 04:03:01,307 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 04:03:01,315 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:03:01" (1/1) ... [2023-04-01 04:03:01,315 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:03:01" (1/1) ... [2023-04-01 04:03:01,347 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:03:01" (1/1) ... [2023-04-01 04:03:01,348 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:03:01" (1/1) ... [2023-04-01 04:03:01,410 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:03:01" (1/1) ... [2023-04-01 04:03:01,434 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:03:01" (1/1) ... [2023-04-01 04:03:01,474 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:03:01" (1/1) ... [2023-04-01 04:03:01,485 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:03:01" (1/1) ... [2023-04-01 04:03:01,521 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 04:03:01,522 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 04:03:01,522 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 04:03:01,522 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 04:03:01,523 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:03:01" (1/1) ... [2023-04-01 04:03:01,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:03:01,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:03:01,548 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 04:03:01,554 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 04:03:01,589 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 04:03:01,589 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 04:03:01,589 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 04:03:01,590 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 04:03:01,590 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 04:03:01,590 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-04-01 04:03:01,590 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-04-01 04:03:01,590 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 04:03:01,590 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 04:03:01,590 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 04:03:01,590 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-04-01 04:03:01,590 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-04-01 04:03:01,591 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 04:03:01,591 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 04:03:01,591 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 04:03:01,591 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 04:03:01,591 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 04:03:01,591 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 04:03:01,591 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 04:03:01,591 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 04:03:01,591 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 04:03:01,591 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 04:03:01,591 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 04:03:01,591 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 04:03:01,591 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 04:03:01,668 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 04:03:01,669 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 04:03:04,871 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 04:03:05,362 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 04:03:05,363 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 04:03:05,366 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:03:05 BoogieIcfgContainer [2023-04-01 04:03:05,366 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 04:03:05,367 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 04:03:05,367 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 04:03:05,370 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 04:03:05,370 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 04:02:59" (1/3) ... [2023-04-01 04:03:05,370 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28e2ecc2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:03:05, skipping insertion in model container [2023-04-01 04:03:05,371 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:03:01" (2/3) ... [2023-04-01 04:03:05,371 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28e2ecc2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:03:05, skipping insertion in model container [2023-04-01 04:03:05,371 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:03:05" (3/3) ... [2023-04-01 04:03:05,372 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem12_label50.c [2023-04-01 04:03:05,385 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 04:03:05,385 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 04:03:05,429 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 04:03:05,434 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;@76f4d7f3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 04:03:05,434 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 04:03:05,440 INFO L276 IsEmpty]: Start isEmpty. Operand has 694 states, 680 states have (on average 1.9764705882352942) internal successors, (1344), 681 states have internal predecessors, (1344), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-01 04:03:05,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 04:03:05,445 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:03:05,445 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:03:05,446 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:03:05,449 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:03:05,449 INFO L85 PathProgramCache]: Analyzing trace with hash 636336641, now seen corresponding path program 1 times [2023-04-01 04:03:05,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:03:05,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162168329] [2023-04-01 04:03:05,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:03:05,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:03:05,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:03:05,706 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 04:03:05,706 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:03:05,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162168329] [2023-04-01 04:03:05,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162168329] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:03:05,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:03:05,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 04:03:05,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889764961] [2023-04-01 04:03:05,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:03:05,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:03:05,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:03:05,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:03:05,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:03:05,746 INFO L87 Difference]: Start difference. First operand has 694 states, 680 states have (on average 1.9764705882352942) internal successors, (1344), 681 states have internal predecessors, (1344), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:03:08,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:03:08,719 INFO L93 Difference]: Finished difference Result 2068 states and 4065 transitions. [2023-04-01 04:03:08,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 04:03:08,721 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 04:03:08,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:03:08,744 INFO L225 Difference]: With dead ends: 2068 [2023-04-01 04:03:08,744 INFO L226 Difference]: Without dead ends: 1371 [2023-04-01 04:03:08,750 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 04:03:08,752 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 718 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 2244 mSolverCounterSat, 687 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 718 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 2931 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 687 IncrementalHoareTripleChecker+Valid, 2244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-04-01 04:03:08,753 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [718 Valid, 126 Invalid, 2931 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [687 Valid, 2244 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-04-01 04:03:08,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1371 states. [2023-04-01 04:03:08,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1371 to 1367. [2023-04-01 04:03:08,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1367 states, 1349 states have (on average 1.9310600444773907) internal successors, (2605), 1349 states have internal predecessors, (2605), 9 states have call successors, (9), 9 states have call predecessors, (9), 8 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2023-04-01 04:03:08,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1367 states to 1367 states and 2628 transitions. [2023-04-01 04:03:08,870 INFO L78 Accepts]: Start accepts. Automaton has 1367 states and 2628 transitions. Word has length 11 [2023-04-01 04:03:08,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:03:08,871 INFO L495 AbstractCegarLoop]: Abstraction has 1367 states and 2628 transitions. [2023-04-01 04:03:08,871 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 04:03:08,871 INFO L276 IsEmpty]: Start isEmpty. Operand 1367 states and 2628 transitions. [2023-04-01 04:03:08,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-01 04:03:08,872 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:03:08,872 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 04:03:08,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 04:03:08,873 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:03:08,873 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:03:08,873 INFO L85 PathProgramCache]: Analyzing trace with hash 620603676, now seen corresponding path program 1 times [2023-04-01 04:03:08,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:03:08,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631518270] [2023-04-01 04:03:08,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:03:08,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:03:08,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:03:09,045 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 04:03:09,045 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:03:09,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631518270] [2023-04-01 04:03:09,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631518270] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:03:09,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:03:09,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:03:09,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473156272] [2023-04-01 04:03:09,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:03:09,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:03:09,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:03:09,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:03:09,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:03:09,048 INFO L87 Difference]: Start difference. First operand 1367 states and 2628 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 04:03:12,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:03:12,641 INFO L93 Difference]: Finished difference Result 4145 states and 7983 transitions. [2023-04-01 04:03:12,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 04:03:12,642 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 04:03:12,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:03:12,655 INFO L225 Difference]: With dead ends: 4145 [2023-04-01 04:03:12,656 INFO L226 Difference]: Without dead ends: 2783 [2023-04-01 04:03:12,663 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-04-01 04:03:12,666 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 2704 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 4011 mSolverCounterSat, 670 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2704 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 4681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 670 IncrementalHoareTripleChecker+Valid, 4011 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2023-04-01 04:03:12,670 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2704 Valid, 89 Invalid, 4681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [670 Valid, 4011 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2023-04-01 04:03:12,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2783 states. [2023-04-01 04:03:12,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2783 to 2754. [2023-04-01 04:03:12,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2754 states, 2712 states have (on average 1.6950589970501475) internal successors, (4597), 2716 states have internal predecessors, (4597), 15 states have call successors, (15), 15 states have call predecessors, (15), 26 states have return successors, (62), 22 states have call predecessors, (62), 14 states have call successors, (62) [2023-04-01 04:03:12,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2754 states to 2754 states and 4674 transitions. [2023-04-01 04:03:12,762 INFO L78 Accepts]: Start accepts. Automaton has 2754 states and 4674 transitions. Word has length 21 [2023-04-01 04:03:12,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:03:12,762 INFO L495 AbstractCegarLoop]: Abstraction has 2754 states and 4674 transitions. [2023-04-01 04:03:12,762 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 04:03:12,762 INFO L276 IsEmpty]: Start isEmpty. Operand 2754 states and 4674 transitions. [2023-04-01 04:03:12,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-04-01 04:03:12,763 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:03:12,763 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:03:12,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 04:03:12,763 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:03:12,764 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:03:12,764 INFO L85 PathProgramCache]: Analyzing trace with hash -209778704, now seen corresponding path program 1 times [2023-04-01 04:03:12,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:03:12,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055151170] [2023-04-01 04:03:12,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:03:12,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:03:12,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:03:12,915 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:03:12,915 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:03:12,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055151170] [2023-04-01 04:03:12,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055151170] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:03:12,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154601455] [2023-04-01 04:03:12,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:03:12,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:03:12,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:03:12,918 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 04:03:12,919 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 04:03:12,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:03:12,995 INFO L262 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-01 04:03:12,999 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:03:13,115 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 04:03:13,116 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:03:13,223 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 04:03:13,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154601455] provided 1 perfect and 1 imperfect interpolant sequences [2023-04-01 04:03:13,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-04-01 04:03:13,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 10 [2023-04-01 04:03:13,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479331758] [2023-04-01 04:03:13,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:03:13,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 04:03:13,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:03:13,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 04:03:13,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-04-01 04:03:13,225 INFO L87 Difference]: Start difference. First operand 2754 states and 4674 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:03:16,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:03:16,214 INFO L93 Difference]: Finished difference Result 8312 states and 14286 transitions. [2023-04-01 04:03:16,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 04:03:16,217 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2023-04-01 04:03:16,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:03:16,235 INFO L225 Difference]: With dead ends: 8312 [2023-04-01 04:03:16,235 INFO L226 Difference]: Without dead ends: 5563 [2023-04-01 04:03:16,239 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 50 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-04-01 04:03:16,248 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 2196 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 2463 mSolverCounterSat, 1175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2196 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 3638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1175 IncrementalHoareTripleChecker+Valid, 2463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-04-01 04:03:16,249 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2196 Valid, 50 Invalid, 3638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1175 Valid, 2463 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2023-04-01 04:03:16,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5563 states. [2023-04-01 04:03:16,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5563 to 5402. [2023-04-01 04:03:16,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5402 states, 5300 states have (on average 1.4671698113207547) internal successors, (7776), 5316 states have internal predecessors, (7776), 27 states have call successors, (27), 27 states have call predecessors, (27), 74 states have return successors, (298), 58 states have call predecessors, (298), 26 states have call successors, (298) [2023-04-01 04:03:16,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5402 states to 5402 states and 8101 transitions. [2023-04-01 04:03:16,345 INFO L78 Accepts]: Start accepts. Automaton has 5402 states and 8101 transitions. Word has length 27 [2023-04-01 04:03:16,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:03:16,345 INFO L495 AbstractCegarLoop]: Abstraction has 5402 states and 8101 transitions. [2023-04-01 04:03:16,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:03:16,345 INFO L276 IsEmpty]: Start isEmpty. Operand 5402 states and 8101 transitions. [2023-04-01 04:03:16,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-04-01 04:03:16,347 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:03:16,347 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:03:16,353 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-01 04:03:16,553 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 04:03:16,553 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:03:16,554 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:03:16,554 INFO L85 PathProgramCache]: Analyzing trace with hash -720875471, now seen corresponding path program 1 times [2023-04-01 04:03:16,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:03:16,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258464108] [2023-04-01 04:03:16,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:03:16,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:03:16,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:03:16,711 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 04:03:16,711 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:03:16,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258464108] [2023-04-01 04:03:16,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258464108] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:03:16,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:03:16,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:03:16,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265307115] [2023-04-01 04:03:16,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:03:16,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:03:16,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:03:16,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:03:16,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:03:16,714 INFO L87 Difference]: Start difference. First operand 5402 states and 8101 transitions. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 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 04:03:19,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:03:19,984 INFO L93 Difference]: Finished difference Result 16668 states and 26548 transitions. [2023-04-01 04:03:19,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 04:03:19,985 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 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 72 [2023-04-01 04:03:19,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:03:20,043 INFO L225 Difference]: With dead ends: 16668 [2023-04-01 04:03:20,043 INFO L226 Difference]: Without dead ends: 11271 [2023-04-01 04:03:20,059 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 04:03:20,063 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 2476 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 3795 mSolverCounterSat, 1090 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2476 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 4885 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1090 IncrementalHoareTripleChecker+Valid, 3795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-04-01 04:03:20,064 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2476 Valid, 101 Invalid, 4885 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1090 Valid, 3795 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2023-04-01 04:03:20,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11271 states. [2023-04-01 04:03:20,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11271 to 11096. [2023-04-01 04:03:20,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11096 states, 10779 states have (on average 1.4042118934966137) internal successors, (15136), 10858 states have internal predecessors, (15136), 51 states have call successors, (51), 51 states have call predecessors, (51), 265 states have return successors, (1566), 186 states have call predecessors, (1566), 50 states have call successors, (1566) [2023-04-01 04:03:20,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11096 states to 11096 states and 16753 transitions. [2023-04-01 04:03:20,353 INFO L78 Accepts]: Start accepts. Automaton has 11096 states and 16753 transitions. Word has length 72 [2023-04-01 04:03:20,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:03:20,354 INFO L495 AbstractCegarLoop]: Abstraction has 11096 states and 16753 transitions. [2023-04-01 04:03:20,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 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 04:03:20,354 INFO L276 IsEmpty]: Start isEmpty. Operand 11096 states and 16753 transitions. [2023-04-01 04:03:20,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-04-01 04:03:20,361 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:03:20,361 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:03:20,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 04:03:20,361 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:03:20,361 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:03:20,361 INFO L85 PathProgramCache]: Analyzing trace with hash 558503208, now seen corresponding path program 1 times [2023-04-01 04:03:20,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:03:20,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856505196] [2023-04-01 04:03:20,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:03:20,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:03:20,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:03:20,575 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 15 proven. 23 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-04-01 04:03:20,578 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:03:20,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856505196] [2023-04-01 04:03:20,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856505196] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:03:20,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042632922] [2023-04-01 04:03:20,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:03:20,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:03:20,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:03:20,580 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 04:03:20,582 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 04:03:20,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:03:20,720 INFO L262 TraceCheckSpWp]: Trace formula consists of 557 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 04:03:20,723 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:03:20,816 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-04-01 04:03:20,816 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 04:03:20,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042632922] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:03:20,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 04:03:20,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-04-01 04:03:20,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50643376] [2023-04-01 04:03:20,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:03:20,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:03:20,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:03:20,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:03:20,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-04-01 04:03:20,865 INFO L87 Difference]: Start difference. First operand 11096 states and 16753 transitions. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 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 04:03:24,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:03:24,043 INFO L93 Difference]: Finished difference Result 27972 states and 43825 transitions. [2023-04-01 04:03:24,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 04:03:24,044 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 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 85 [2023-04-01 04:03:24,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:03:24,115 INFO L225 Difference]: With dead ends: 27972 [2023-04-01 04:03:24,115 INFO L226 Difference]: Without dead ends: 16881 [2023-04-01 04:03:24,148 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-04-01 04:03:24,149 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 2299 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 3928 mSolverCounterSat, 815 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2299 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 4743 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 815 IncrementalHoareTripleChecker+Valid, 3928 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-04-01 04:03:24,149 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2299 Valid, 93 Invalid, 4743 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [815 Valid, 3928 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2023-04-01 04:03:24,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16881 states. [2023-04-01 04:03:24,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16881 to 16319. [2023-04-01 04:03:24,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16319 states, 15765 states have (on average 1.3381541389153186) internal successors, (21096), 15925 states have internal predecessors, (21096), 73 states have call successors, (73), 73 states have call predecessors, (73), 480 states have return successors, (3540), 320 states have call predecessors, (3540), 72 states have call successors, (3540) [2023-04-01 04:03:24,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16319 states to 16319 states and 24709 transitions. [2023-04-01 04:03:24,632 INFO L78 Accepts]: Start accepts. Automaton has 16319 states and 24709 transitions. Word has length 85 [2023-04-01 04:03:24,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:03:24,632 INFO L495 AbstractCegarLoop]: Abstraction has 16319 states and 24709 transitions. [2023-04-01 04:03:24,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 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 04:03:24,633 INFO L276 IsEmpty]: Start isEmpty. Operand 16319 states and 24709 transitions. [2023-04-01 04:03:24,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2023-04-01 04:03:24,635 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:03:24,635 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:03:24,656 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 04:03:24,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:03:24,842 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:03:24,842 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:03:24,842 INFO L85 PathProgramCache]: Analyzing trace with hash 1203146727, now seen corresponding path program 1 times [2023-04-01 04:03:24,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:03:24,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115958171] [2023-04-01 04:03:24,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:03:24,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:03:24,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:03:25,034 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 42 proven. 27 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-04-01 04:03:25,034 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:03:25,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115958171] [2023-04-01 04:03:25,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115958171] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:03:25,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205399780] [2023-04-01 04:03:25,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:03:25,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:03:25,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:03:25,039 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) [2023-04-01 04:03:25,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 04:03:25,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:03:25,164 INFO L262 TraceCheckSpWp]: Trace formula consists of 675 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 04:03:25,171 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:03:25,254 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 77 proven. 2 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-04-01 04:03:25,254 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:03:25,422 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 42 proven. 27 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-04-01 04:03:25,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205399780] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 04:03:25,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [580868250] [2023-04-01 04:03:25,439 INFO L159 IcfgInterpreter]: Started Sifa with 56 locations of interest [2023-04-01 04:03:25,439 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 04:03:25,441 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 04:03:25,445 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 04:03:25,445 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 04:03:25,571 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 52 for LOIs [2023-04-01 04:03:25,745 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2023-04-01 04:03:25,859 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 17465 conjuctions. This might take some time... [2023-04-01 04:03:26,956 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 465 conjuctions. [2023-04-01 04:03:41,785 WARN L223 SmtUtils]: Spent 10.02s on a formula simplification that was a NOOP. DAG size: 915 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm)