/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/eca-rers2012/Problem13_label03.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 04:04:01,986 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 04:04:01,988 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 04:04:02,018 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 04:04:02,018 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 04:04:02,020 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 04:04:02,023 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 04:04:02,025 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 04:04:02,027 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 04:04:02,031 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 04:04:02,032 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 04:04:02,033 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 04:04:02,034 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 04:04:02,035 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 04:04:02,036 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 04:04:02,037 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 04:04:02,038 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 04:04:02,038 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 04:04:02,040 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 04:04:02,043 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 04:04:02,044 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 04:04:02,045 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 04:04:02,046 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 04:04:02,047 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 04:04:02,053 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 04:04:02,053 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 04:04:02,053 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 04:04:02,055 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 04:04:02,055 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 04:04:02,055 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 04:04:02,056 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 04:04:02,056 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 04:04:02,057 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 04:04:02,058 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 04:04:02,058 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 04:04:02,058 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 04:04:02,059 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 04:04:02,059 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 04:04:02,059 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 04:04:02,060 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 04:04:02,060 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 04:04:02,061 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 04:04:02,083 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 04:04:02,083 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 04:04:02,083 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 04:04:02,083 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 04:04:02,084 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 04:04:02,084 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 04:04:02,084 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 04:04:02,084 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 04:04:02,084 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 04:04:02,084 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 04:04:02,084 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 04:04:02,084 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 04:04:02,084 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 04:04:02,084 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 04:04:02,084 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 04:04:02,085 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 04:04:02,085 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 04:04:02,085 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 04:04:02,085 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 04:04:02,085 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 04:04:02,085 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 04:04:02,085 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 04:04:02,086 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 04:04:02,086 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 04:04:02,086 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 04:04:02,086 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 04:04:02,086 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 04:04:02,086 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 04:04:02,086 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 04:04:02,086 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 04:04:02,086 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 04:04:02,086 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 04:04:02,086 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:04:02,087 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 04:04:02,087 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 04:04:02,087 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 04:04:02,087 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 04:04:02,087 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 04:04:02,087 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 04:04:02,087 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 04:04:02,087 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 04:04:02,087 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 04:04:02,294 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 04:04:02,313 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 04:04:02,314 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 04:04:02,315 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 04:04:02,316 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 04:04:02,317 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem13_label03.c [2023-04-01 04:04:03,469 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 04:04:03,811 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 04:04:03,811 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label03.c [2023-04-01 04:04:03,838 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/14ad981dc/9d6235d9066e4dfa95d0fa2451ac565c/FLAGdf400e563 [2023-04-01 04:04:03,851 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/14ad981dc/9d6235d9066e4dfa95d0fa2451ac565c [2023-04-01 04:04:03,853 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 04:04:03,854 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 04:04:03,857 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 04:04:03,857 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 04:04:03,859 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 04:04:03,860 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:04:03" (1/1) ... [2023-04-01 04:04:03,861 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ff348c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:04:03, skipping insertion in model container [2023-04-01 04:04:03,861 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:04:03" (1/1) ... [2023-04-01 04:04:03,866 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 04:04:03,955 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 04:04:04,174 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label03.c[5036,5049] [2023-04-01 04:04:04,846 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:04:04,855 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 04:04:04,875 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label03.c[5036,5049] [2023-04-01 04:04:05,268 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:04:05,288 INFO L208 MainTranslator]: Completed translation [2023-04-01 04:04:05,289 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:04:05 WrapperNode [2023-04-01 04:04:05,289 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 04:04:05,290 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 04:04:05,290 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 04:04:05,290 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 04:04:05,299 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:04:05" (1/1) ... [2023-04-01 04:04:05,299 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:04:05" (1/1) ... [2023-04-01 04:04:05,355 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:04:05" (1/1) ... [2023-04-01 04:04:05,355 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:04:05" (1/1) ... [2023-04-01 04:04:05,448 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:04:05" (1/1) ... [2023-04-01 04:04:05,463 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:04:05" (1/1) ... [2023-04-01 04:04:05,484 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:04:05" (1/1) ... [2023-04-01 04:04:05,498 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:04:05" (1/1) ... [2023-04-01 04:04:05,523 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 04:04:05,524 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 04:04:05,524 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 04:04:05,524 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 04:04:05,525 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:04:05" (1/1) ... [2023-04-01 04:04:05,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:04:05,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:04:05,549 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 04:04:05,666 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 04:04:05,697 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 04:04:05,697 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 04:04:05,698 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 04:04:05,698 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 04:04:05,698 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 04:04:05,698 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-04-01 04:04:05,698 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-04-01 04:04:05,698 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 04:04:05,698 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 04:04:05,698 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 04:04:05,698 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-04-01 04:04:05,698 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-04-01 04:04:05,698 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 04:04:05,698 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 04:04:05,698 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 04:04:05,698 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 04:04:05,699 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 04:04:05,699 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 04:04:05,699 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 04:04:05,699 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 04:04:05,699 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 04:04:05,699 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 04:04:05,699 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 04:04:05,699 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 04:04:05,699 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 04:04:05,777 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 04:04:05,778 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 04:04:09,974 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 04:04:12,485 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 04:04:12,485 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 04:04:12,490 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:04:12 BoogieIcfgContainer [2023-04-01 04:04:12,490 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 04:04:12,606 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 04:04:12,606 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 04:04:12,609 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 04:04:12,609 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 04:04:03" (1/3) ... [2023-04-01 04:04:12,609 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a110dca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:04:12, skipping insertion in model container [2023-04-01 04:04:12,609 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:04:05" (2/3) ... [2023-04-01 04:04:12,609 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a110dca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:04:12, skipping insertion in model container [2023-04-01 04:04:12,610 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:04:12" (3/3) ... [2023-04-01 04:04:12,610 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem13_label03.c [2023-04-01 04:04:12,627 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 04:04:12,627 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 04:04:12,685 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 04:04:12,690 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;@1e2b9688, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 04:04:12,690 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 04:04:12,696 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 04:04:12,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 04:04:12,701 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:04:12,701 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:04:12,701 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:04:12,705 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:04:12,705 INFO L85 PathProgramCache]: Analyzing trace with hash -134419435, now seen corresponding path program 1 times [2023-04-01 04:04:12,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:04:12,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68659744] [2023-04-01 04:04:12,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:04:12,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:04:12,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:04:12,992 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 04:04:12,993 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:04:12,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68659744] [2023-04-01 04:04:12,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68659744] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:04:12,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:04:12,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 04:04:12,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714967603] [2023-04-01 04:04:12,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:04:12,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:04:12,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:04:13,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:04:13,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:04:13,021 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 04:04:16,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:04:16,029 INFO L93 Difference]: Finished difference Result 2068 states and 4065 transitions. [2023-04-01 04:04:16,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 04:04:16,046 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 04:04:16,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:04:16,077 INFO L225 Difference]: With dead ends: 2068 [2023-04-01 04:04:16,077 INFO L226 Difference]: Without dead ends: 1371 [2023-04-01 04:04:16,085 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 04:04:16,089 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 757 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 2057 mSolverCounterSat, 975 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 757 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 3032 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 975 IncrementalHoareTripleChecker+Valid, 2057 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-04-01 04:04:16,090 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [757 Valid, 138 Invalid, 3032 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [975 Valid, 2057 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2023-04-01 04:04:16,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1371 states. [2023-04-01 04:04:16,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1371 to 1366. [2023-04-01 04:04:16,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1366 states, 1348 states have (on average 1.9117210682492582) internal successors, (2577), 1348 states have internal predecessors, (2577), 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 04:04:16,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1366 states to 1366 states and 2600 transitions. [2023-04-01 04:04:16,194 INFO L78 Accepts]: Start accepts. Automaton has 1366 states and 2600 transitions. Word has length 11 [2023-04-01 04:04:16,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:04:16,195 INFO L495 AbstractCegarLoop]: Abstraction has 1366 states and 2600 transitions. [2023-04-01 04:04:16,195 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 04:04:16,196 INFO L276 IsEmpty]: Start isEmpty. Operand 1366 states and 2600 transitions. [2023-04-01 04:04:16,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-04-01 04:04:16,197 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:04:16,197 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] [2023-04-01 04:04:16,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 04:04:16,198 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:04:16,198 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:04:16,198 INFO L85 PathProgramCache]: Analyzing trace with hash -1261379059, now seen corresponding path program 1 times [2023-04-01 04:04:16,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:04:16,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588561938] [2023-04-01 04:04:16,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:04:16,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:04:16,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:04:16,517 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 04:04:16,517 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:04:16,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588561938] [2023-04-01 04:04:16,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588561938] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:04:16,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:04:16,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:04:16,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588454397] [2023-04-01 04:04:16,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:04:16,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:04:16,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:04:16,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:04:16,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:04:16,520 INFO L87 Difference]: Start difference. First operand 1366 states and 2600 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 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 04:04:20,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:04:20,187 INFO L93 Difference]: Finished difference Result 4172 states and 7968 transitions. [2023-04-01 04:04:20,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 04:04:20,188 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 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 26 [2023-04-01 04:04:20,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:04:20,199 INFO L225 Difference]: With dead ends: 4172 [2023-04-01 04:04:20,199 INFO L226 Difference]: Without dead ends: 2811 [2023-04-01 04:04:20,216 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 04:04:20,217 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 2226 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 4443 mSolverCounterSat, 632 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2226 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 5075 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 632 IncrementalHoareTripleChecker+Valid, 4443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2023-04-01 04:04:20,218 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2226 Valid, 134 Invalid, 5075 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [632 Valid, 4443 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2023-04-01 04:04:20,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2811 states. [2023-04-01 04:04:20,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2811 to 2750. [2023-04-01 04:04:20,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2750 states, 2707 states have (on average 1.7960842260805319) internal successors, (4862), 2712 states have internal predecessors, (4862), 15 states have call successors, (15), 15 states have call predecessors, (15), 27 states have return successors, (74), 22 states have call predecessors, (74), 14 states have call successors, (74) [2023-04-01 04:04:20,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2750 states to 2750 states and 4951 transitions. [2023-04-01 04:04:20,312 INFO L78 Accepts]: Start accepts. Automaton has 2750 states and 4951 transitions. Word has length 26 [2023-04-01 04:04:20,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:04:20,312 INFO L495 AbstractCegarLoop]: Abstraction has 2750 states and 4951 transitions. [2023-04-01 04:04:20,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 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 04:04:20,313 INFO L276 IsEmpty]: Start isEmpty. Operand 2750 states and 4951 transitions. [2023-04-01 04:04:20,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-04-01 04:04:20,314 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:04:20,314 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 04:04:20,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 04:04:20,314 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:04:20,315 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:04:20,315 INFO L85 PathProgramCache]: Analyzing trace with hash -121163206, now seen corresponding path program 1 times [2023-04-01 04:04:20,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:04:20,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214877678] [2023-04-01 04:04:20,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:04:20,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:04:20,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:04:20,561 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 04:04:20,561 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:04:20,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214877678] [2023-04-01 04:04:20,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214877678] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:04:20,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:04:20,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:04:20,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997727595] [2023-04-01 04:04:20,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:04:20,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:04:20,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:04:20,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:04:20,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:04:20,565 INFO L87 Difference]: Start difference. First operand 2750 states and 4951 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:04:24,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:04:24,235 INFO L93 Difference]: Finished difference Result 8308 states and 15116 transitions. [2023-04-01 04:04:24,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 04:04:24,237 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2023-04-01 04:04:24,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:04:24,261 INFO L225 Difference]: With dead ends: 8308 [2023-04-01 04:04:24,261 INFO L226 Difference]: Without dead ends: 5563 [2023-04-01 04:04:24,270 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 04:04:24,274 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 2290 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 4058 mSolverCounterSat, 1109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2290 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 5167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1109 IncrementalHoareTripleChecker+Valid, 4058 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2023-04-01 04:04:24,275 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2290 Valid, 127 Invalid, 5167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1109 Valid, 4058 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2023-04-01 04:04:24,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5563 states. [2023-04-01 04:04:24,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5563 to 5523. [2023-04-01 04:04:24,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5523 states, 5422 states have (on average 1.550165990409443) internal successors, (8405), 5439 states have internal predecessors, (8405), 27 states have call successors, (27), 27 states have call predecessors, (27), 73 states have return successors, (304), 56 states have call predecessors, (304), 26 states have call successors, (304) [2023-04-01 04:04:24,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5523 states to 5523 states and 8736 transitions. [2023-04-01 04:04:24,397 INFO L78 Accepts]: Start accepts. Automaton has 5523 states and 8736 transitions. Word has length 27 [2023-04-01 04:04:24,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:04:24,398 INFO L495 AbstractCegarLoop]: Abstraction has 5523 states and 8736 transitions. [2023-04-01 04:04:24,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:04:24,398 INFO L276 IsEmpty]: Start isEmpty. Operand 5523 states and 8736 transitions. [2023-04-01 04:04:24,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-04-01 04:04:24,400 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:04:24,400 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:04:24,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 04:04:24,400 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:04:24,401 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:04:24,401 INFO L85 PathProgramCache]: Analyzing trace with hash 17806204, now seen corresponding path program 1 times [2023-04-01 04:04:24,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:04:24,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657814817] [2023-04-01 04:04:24,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:04:24,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:04:24,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:04:24,542 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 04:04:24,542 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:04:24,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657814817] [2023-04-01 04:04:24,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657814817] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:04:24,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683740343] [2023-04-01 04:04:24,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:04:24,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:04:24,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:04:24,546 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 04:04:24,585 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 04:04:24,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:04:24,686 INFO L262 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 04:04:24,690 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:04:24,765 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 04:04:24,766 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 04:04:24,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683740343] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:04:24,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 04:04:24,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-04-01 04:04:24,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829771307] [2023-04-01 04:04:24,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:04:24,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:04:24,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:04:24,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:04:24,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-01 04:04:24,768 INFO L87 Difference]: Start difference. First operand 5523 states and 8736 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 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 04:04:28,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:04:28,421 INFO L93 Difference]: Finished difference Result 16772 states and 27414 transitions. [2023-04-01 04:04:28,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 04:04:28,422 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 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 36 [2023-04-01 04:04:28,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:04:28,524 INFO L225 Difference]: With dead ends: 16772 [2023-04-01 04:04:28,525 INFO L226 Difference]: Without dead ends: 11254 [2023-04-01 04:04:28,552 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2023-04-01 04:04:28,556 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 2443 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 3409 mSolverCounterSat, 1492 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2443 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 4901 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1492 IncrementalHoareTripleChecker+Valid, 3409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2023-04-01 04:04:28,557 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2443 Valid, 83 Invalid, 4901 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1492 Valid, 3409 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2023-04-01 04:04:28,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11254 states. [2023-04-01 04:04:28,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11254 to 11047. [2023-04-01 04:04:28,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11047 states, 10786 states have (on average 1.3714073799369553) internal successors, (14792), 10848 states have internal predecessors, (14792), 51 states have call successors, (51), 51 states have call predecessors, (51), 209 states have return successors, (1155), 147 states have call predecessors, (1155), 50 states have call successors, (1155) [2023-04-01 04:04:28,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11047 states to 11047 states and 15998 transitions. [2023-04-01 04:04:28,861 INFO L78 Accepts]: Start accepts. Automaton has 11047 states and 15998 transitions. Word has length 36 [2023-04-01 04:04:28,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:04:28,862 INFO L495 AbstractCegarLoop]: Abstraction has 11047 states and 15998 transitions. [2023-04-01 04:04:28,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 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 04:04:28,862 INFO L276 IsEmpty]: Start isEmpty. Operand 11047 states and 15998 transitions. [2023-04-01 04:04:28,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-04-01 04:04:28,868 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:04:28,868 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:04:28,884 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 04:04:29,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:04:29,074 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:04:29,075 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:04:29,075 INFO L85 PathProgramCache]: Analyzing trace with hash 1569966171, now seen corresponding path program 1 times [2023-04-01 04:04:29,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:04:29,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126759878] [2023-04-01 04:04:29,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:04:29,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:04:29,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:04:29,271 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 04:04:29,272 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:04:29,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126759878] [2023-04-01 04:04:29,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126759878] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:04:29,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859678095] [2023-04-01 04:04:29,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:04:29,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:04:29,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:04:29,282 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 04:04:29,283 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 04:04:29,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:04:29,380 INFO L262 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 04:04:29,382 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:04:29,431 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 04:04:29,432 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 04:04:29,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859678095] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:04:29,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 04:04:29,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-04-01 04:04:29,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650232598] [2023-04-01 04:04:29,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:04:29,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:04:29,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:04:29,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:04:29,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-01 04:04:29,433 INFO L87 Difference]: Start difference. First operand 11047 states and 15998 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 04:04:33,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:04:33,218 INFO L93 Difference]: Finished difference Result 27779 states and 41314 transitions. [2023-04-01 04:04:33,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 04:04:33,220 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 45 [2023-04-01 04:04:33,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:04:33,306 INFO L225 Difference]: With dead ends: 27779 [2023-04-01 04:04:33,306 INFO L226 Difference]: Without dead ends: 16737 [2023-04-01 04:04:33,368 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-04-01 04:04:33,370 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 2041 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 4473 mSolverCounterSat, 971 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2041 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 5444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 971 IncrementalHoareTripleChecker+Valid, 4473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2023-04-01 04:04:33,370 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2041 Valid, 104 Invalid, 5444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [971 Valid, 4473 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2023-04-01 04:04:33,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16737 states. [2023-04-01 04:04:33,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16737 to 15990. [2023-04-01 04:04:33,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15990 states, 15538 states have (on average 1.2894194877075558) internal successors, (20035), 15659 states have internal predecessors, (20035), 73 states have call successors, (73), 73 states have call predecessors, (73), 378 states have return successors, (2585), 257 states have call predecessors, (2585), 72 states have call successors, (2585) [2023-04-01 04:04:33,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15990 states to 15990 states and 22693 transitions. [2023-04-01 04:04:33,896 INFO L78 Accepts]: Start accepts. Automaton has 15990 states and 22693 transitions. Word has length 45 [2023-04-01 04:04:33,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:04:33,897 INFO L495 AbstractCegarLoop]: Abstraction has 15990 states and 22693 transitions. [2023-04-01 04:04:33,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 04:04:33,898 INFO L276 IsEmpty]: Start isEmpty. Operand 15990 states and 22693 transitions. [2023-04-01 04:04:33,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-04-01 04:04:33,899 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:04:33,900 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] [2023-04-01 04:04:33,925 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-04-01 04:04:34,104 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 04:04:34,105 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:04:34,109 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:04:34,109 INFO L85 PathProgramCache]: Analyzing trace with hash 126891872, now seen corresponding path program 1 times [2023-04-01 04:04:34,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:04:34,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776766372] [2023-04-01 04:04:34,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:04:34,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:04:34,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:04:34,477 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 04:04:34,478 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:04:34,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776766372] [2023-04-01 04:04:34,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776766372] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:04:34,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:04:34,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:04:34,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734796756] [2023-04-01 04:04:34,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:04:34,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:04:34,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:04:34,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:04:34,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:04:34,479 INFO L87 Difference]: Start difference. First operand 15990 states and 22693 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), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:04:38,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:04:38,441 INFO L93 Difference]: Finished difference Result 28743 states and 41645 transitions. [2023-04-01 04:04:38,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 04:04:38,442 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), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 70 [2023-04-01 04:04:38,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:04:38,490 INFO L225 Difference]: With dead ends: 28743 [2023-04-01 04:04:38,491 INFO L226 Difference]: Without dead ends: 16373 [2023-04-01 04:04:38,511 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-04-01 04:04:38,512 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 2077 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 4338 mSolverCounterSat, 567 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2077 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 4905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 567 IncrementalHoareTripleChecker+Valid, 4338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2023-04-01 04:04:38,513 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2077 Valid, 100 Invalid, 4905 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [567 Valid, 4338 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2023-04-01 04:04:38,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16373 states. [2023-04-01 04:04:38,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16373 to 16302. [2023-04-01 04:04:38,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16302 states, 15832 states have (on average 1.2824027286508337) internal successors, (20303), 15960 states have internal predecessors, (20303), 74 states have call successors, (74), 74 states have call predecessors, (74), 395 states have return successors, (2607), 267 states have call predecessors, (2607), 73 states have call successors, (2607) [2023-04-01 04:04:38,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16302 states to 16302 states and 22984 transitions. [2023-04-01 04:04:38,815 INFO L78 Accepts]: Start accepts. Automaton has 16302 states and 22984 transitions. Word has length 70 [2023-04-01 04:04:38,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:04:38,816 INFO L495 AbstractCegarLoop]: Abstraction has 16302 states and 22984 transitions. [2023-04-01 04:04:38,816 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), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:04:38,816 INFO L276 IsEmpty]: Start isEmpty. Operand 16302 states and 22984 transitions. [2023-04-01 04:04:38,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-04-01 04:04:38,818 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:04:38,818 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:04:38,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-01 04:04:38,818 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:04:38,818 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:04:38,819 INFO L85 PathProgramCache]: Analyzing trace with hash -158953636, now seen corresponding path program 1 times [2023-04-01 04:04:38,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:04:38,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494219729] [2023-04-01 04:04:38,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:04:38,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:04:38,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:04:39,070 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-04-01 04:04:39,071 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:04:39,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494219729] [2023-04-01 04:04:39,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494219729] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:04:39,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:04:39,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 04:04:39,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150106739] [2023-04-01 04:04:39,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:04:39,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:04:39,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:04:39,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:04:39,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:04:39,073 INFO L87 Difference]: Start difference. First operand 16302 states and 22984 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 04:04:42,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:04:42,223 INFO L93 Difference]: Finished difference Result 32412 states and 47998 transitions. [2023-04-01 04:04:42,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 04:04:42,232 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 79 [2023-04-01 04:04:42,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:04:42,283 INFO L225 Difference]: With dead ends: 32412 [2023-04-01 04:04:42,283 INFO L226 Difference]: Without dead ends: 19998 [2023-04-01 04:04:42,305 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:04:42,305 INFO L413 NwaCegarLoop]: 375 mSDtfsCounter, 717 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 2598 mSolverCounterSat, 392 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 717 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 2990 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 392 IncrementalHoareTripleChecker+Valid, 2598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2023-04-01 04:04:42,305 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [717 Valid, 396 Invalid, 2990 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [392 Valid, 2598 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2023-04-01 04:04:42,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19998 states. [2023-04-01 04:04:42,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19998 to 19329. [2023-04-01 04:04:42,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19329 states, 18811 states have (on average 1.3104034873212482) internal successors, (24650), 18948 states have internal predecessors, (24650), 88 states have call successors, (88), 88 states have call predecessors, (88), 429 states have return successors, (3451), 292 states have call predecessors, (3451), 87 states have call successors, (3451) [2023-04-01 04:04:42,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19329 states to 19329 states and 28189 transitions. [2023-04-01 04:04:42,598 INFO L78 Accepts]: Start accepts. Automaton has 19329 states and 28189 transitions. Word has length 79 [2023-04-01 04:04:42,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:04:42,601 INFO L495 AbstractCegarLoop]: Abstraction has 19329 states and 28189 transitions. [2023-04-01 04:04:42,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 04:04:42,601 INFO L276 IsEmpty]: Start isEmpty. Operand 19329 states and 28189 transitions. [2023-04-01 04:04:42,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-04-01 04:04:42,603 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:04:42,603 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 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] [2023-04-01 04:04:42,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-01 04:04:42,604 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:04:42,604 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:04:42,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1808442046, now seen corresponding path program 1 times [2023-04-01 04:04:42,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:04:42,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764052816] [2023-04-01 04:04:42,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:04:42,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:04:42,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:04:42,816 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 41 proven. 12 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-04-01 04:04:42,817 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:04:42,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764052816] [2023-04-01 04:04:42,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764052816] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:04:42,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93154653] [2023-04-01 04:04:42,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:04:42,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:04:42,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:04:42,818 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 04:04:42,820 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 04:04:42,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:04:42,940 INFO L262 TraceCheckSpWp]: Trace formula consists of 675 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 04:04:42,947 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:04:42,970 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2023-04-01 04:04:42,970 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 04:04:42,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93154653] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:04:42,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 04:04:42,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-04-01 04:04:42,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78798536] [2023-04-01 04:04:42,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:04:43,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:04:43,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:04:43,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:04:43,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:04:43,055 INFO L87 Difference]: Start difference. First operand 19329 states and 28189 transitions. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 04:04:45,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:04:45,691 INFO L93 Difference]: Finished difference Result 39557 states and 59151 transitions. [2023-04-01 04:04:45,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 04:04:45,692 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 90 [2023-04-01 04:04:45,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:04:45,738 INFO L225 Difference]: With dead ends: 39557 [2023-04-01 04:04:45,738 INFO L226 Difference]: Without dead ends: 20815 [2023-04-01 04:04:45,772 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:04:45,773 INFO L413 NwaCegarLoop]: 906 mSDtfsCounter, 855 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 2110 mSolverCounterSat, 611 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 855 SdHoareTripleChecker+Valid, 934 SdHoareTripleChecker+Invalid, 2721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 611 IncrementalHoareTripleChecker+Valid, 2110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-04-01 04:04:45,773 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [855 Valid, 934 Invalid, 2721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [611 Valid, 2110 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-04-01 04:04:45,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20815 states. [2023-04-01 04:04:46,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20815 to 20544. [2023-04-01 04:04:46,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20544 states, 20020 states have (on average 1.2737762237762238) internal successors, (25501), 20155 states have internal predecessors, (25501), 94 states have call successors, (94), 94 states have call predecessors, (94), 429 states have return successors, (3277), 294 states have call predecessors, (3277), 93 states have call successors, (3277) [2023-04-01 04:04:46,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20544 states to 20544 states and 28872 transitions. [2023-04-01 04:04:46,069 INFO L78 Accepts]: Start accepts. Automaton has 20544 states and 28872 transitions. Word has length 90 [2023-04-01 04:04:46,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:04:46,069 INFO L495 AbstractCegarLoop]: Abstraction has 20544 states and 28872 transitions. [2023-04-01 04:04:46,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 04:04:46,070 INFO L276 IsEmpty]: Start isEmpty. Operand 20544 states and 28872 transitions. [2023-04-01 04:04:46,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-04-01 04:04:46,071 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:04:46,071 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:04:46,091 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-04-01 04:04:46,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:04:46,277 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:04:46,277 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:04:46,278 INFO L85 PathProgramCache]: Analyzing trace with hash 748466577, now seen corresponding path program 1 times [2023-04-01 04:04:46,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:04:46,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647160000] [2023-04-01 04:04:46,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:04:46,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:04:46,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:04:46,581 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 72 proven. 10 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-04-01 04:04:46,581 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:04:46,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647160000] [2023-04-01 04:04:46,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647160000] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:04:46,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589499167] [2023-04-01 04:04:46,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:04:46,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:04:46,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:04:46,582 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 04:04:46,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 04:04:46,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:04:46,703 INFO L262 TraceCheckSpWp]: Trace formula consists of 702 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-01 04:04:46,709 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:04:46,849 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 23 proven. 6 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2023-04-01 04:04:46,850 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:04:47,161 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2023-04-01 04:04:47,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589499167] provided 1 perfect and 1 imperfect interpolant sequences [2023-04-01 04:04:47,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-04-01 04:04:47,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 9 [2023-04-01 04:04:47,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944336410] [2023-04-01 04:04:47,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:04:47,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:04:47,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:04:47,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:04:47,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-04-01 04:04:47,163 INFO L87 Difference]: Start difference. First operand 20544 states and 28872 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 04:04:50,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:04:50,838 INFO L93 Difference]: Finished difference Result 57351 states and 83996 transitions. [2023-04-01 04:04:50,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 04:04:50,839 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 103 [2023-04-01 04:04:50,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:04:50,940 INFO L225 Difference]: With dead ends: 57351 [2023-04-01 04:04:50,940 INFO L226 Difference]: Without dead ends: 37394 [2023-04-01 04:04:50,981 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 198 SyntacticMatches, 9 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-04-01 04:04:50,982 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 2403 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 3556 mSolverCounterSat, 860 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2403 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 4416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 860 IncrementalHoareTripleChecker+Valid, 3556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2023-04-01 04:04:50,983 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2403 Valid, 85 Invalid, 4416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [860 Valid, 3556 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2023-04-01 04:04:51,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37394 states. [2023-04-01 04:04:51,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37394 to 36374. [2023-04-01 04:04:51,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36374 states, 35280 states have (on average 1.2165532879818595) internal successors, (42920), 35616 states have internal predecessors, (42920), 164 states have call successors, (164), 164 states have call predecessors, (164), 929 states have return successors, (7837), 593 states have call predecessors, (7837), 163 states have call successors, (7837) [2023-04-01 04:04:51,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36374 states to 36374 states and 50921 transitions. [2023-04-01 04:04:51,676 INFO L78 Accepts]: Start accepts. Automaton has 36374 states and 50921 transitions. Word has length 103 [2023-04-01 04:04:51,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:04:51,677 INFO L495 AbstractCegarLoop]: Abstraction has 36374 states and 50921 transitions. [2023-04-01 04:04:51,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 04:04:51,677 INFO L276 IsEmpty]: Start isEmpty. Operand 36374 states and 50921 transitions. [2023-04-01 04:04:51,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2023-04-01 04:04:51,682 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:04:51,682 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-04-01 04:04:51,688 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-04-01 04:04:51,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:04:51,888 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:04:51,889 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:04:51,889 INFO L85 PathProgramCache]: Analyzing trace with hash 269336022, now seen corresponding path program 1 times [2023-04-01 04:04:51,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:04:51,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621206876] [2023-04-01 04:04:51,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:04:51,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:04:51,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:04:52,016 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 49 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:04:52,017 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:04:52,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621206876] [2023-04-01 04:04:52,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621206876] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:04:52,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554902134] [2023-04-01 04:04:52,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:04:52,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:04:52,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:04:52,021 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 04:04:52,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 04:04:52,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:04:52,128 INFO L262 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 04:04:52,135 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:04:52,160 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-04-01 04:04:52,160 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 04:04:52,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554902134] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:04:52,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 04:04:52,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-04-01 04:04:52,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597888687] [2023-04-01 04:04:52,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:04:52,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:04:52,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:04:52,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:04:52,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-01 04:04:52,162 INFO L87 Difference]: Start difference. First operand 36374 states and 50921 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 04:04:55,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:04:55,579 INFO L93 Difference]: Finished difference Result 80254 states and 114864 transitions. [2023-04-01 04:04:55,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 04:04:55,580 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 122 [2023-04-01 04:04:55,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:04:55,755 INFO L225 Difference]: With dead ends: 80254 [2023-04-01 04:04:55,755 INFO L226 Difference]: Without dead ends: 49650 [2023-04-01 04:04:55,822 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 121 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-01 04:04:55,822 INFO L413 NwaCegarLoop]: 375 mSDtfsCounter, 696 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 2399 mSolverCounterSat, 584 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 696 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 2983 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 584 IncrementalHoareTripleChecker+Valid, 2399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-04-01 04:04:55,822 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [696 Valid, 396 Invalid, 2983 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [584 Valid, 2399 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2023-04-01 04:04:55,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49650 states. [2023-04-01 04:04:56,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49650 to 41254. [2023-04-01 04:04:56,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41254 states, 40072 states have (on average 1.2088490716709923) internal successors, (48441), 40426 states have internal predecessors, (48441), 190 states have call successors, (190), 190 states have call predecessors, (190), 991 states have return successors, (9313), 637 states have call predecessors, (9313), 189 states have call successors, (9313) [2023-04-01 04:04:56,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41254 states to 41254 states and 57944 transitions. [2023-04-01 04:04:56,887 INFO L78 Accepts]: Start accepts. Automaton has 41254 states and 57944 transitions. Word has length 122 [2023-04-01 04:04:56,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:04:56,887 INFO L495 AbstractCegarLoop]: Abstraction has 41254 states and 57944 transitions. [2023-04-01 04:04:56,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 04:04:56,888 INFO L276 IsEmpty]: Start isEmpty. Operand 41254 states and 57944 transitions. [2023-04-01 04:04:56,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2023-04-01 04:04:56,911 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:04:56,911 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:04:56,933 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-01 04:04:57,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-04-01 04:04:57,117 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:04:57,118 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:04:57,118 INFO L85 PathProgramCache]: Analyzing trace with hash -162930728, now seen corresponding path program 1 times [2023-04-01 04:04:57,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:04:57,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486473206] [2023-04-01 04:04:57,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:04:57,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:04:57,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:04:57,596 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 63 proven. 6 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-01 04:04:57,596 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:04:57,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486473206] [2023-04-01 04:04:57,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486473206] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:04:57,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393433530] [2023-04-01 04:04:57,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:04:57,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:04:57,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:04:57,614 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 04:04:57,615 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-01 04:04:58,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:04:58,168 INFO L262 TraceCheckSpWp]: Trace formula consists of 838 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 04:04:58,172 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:04:58,459 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 68 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-01 04:04:58,460 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:04:59,193 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 68 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-01 04:04:59,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393433530] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 04:04:59,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [301976107] [2023-04-01 04:04:59,220 INFO L159 IcfgInterpreter]: Started Sifa with 265 locations of interest [2023-04-01 04:04:59,220 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 04:04:59,223 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 04:04:59,227 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 04:04:59,227 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 04:04:59,331 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 49 for LOIs [2023-04-01 04:04:59,932 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 28 [2023-04-01 04:05:01,296 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 94298 conjuctions. This might take some time...