/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/Problem01_label54.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 03:14:10,100 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 03:14:10,102 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 03:14:10,141 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 03:14:10,142 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 03:14:10,144 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 03:14:10,147 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 03:14:10,149 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 03:14:10,150 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 03:14:10,155 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 03:14:10,156 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 03:14:10,158 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 03:14:10,158 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 03:14:10,161 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 03:14:10,162 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 03:14:10,165 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 03:14:10,166 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 03:14:10,168 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 03:14:10,170 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 03:14:10,174 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 03:14:10,175 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 03:14:10,177 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 03:14:10,177 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 03:14:10,178 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 03:14:10,186 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 03:14:10,186 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 03:14:10,187 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 03:14:10,188 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 03:14:10,189 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 03:14:10,189 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 03:14:10,189 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 03:14:10,190 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 03:14:10,191 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 03:14:10,192 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 03:14:10,193 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 03:14:10,193 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 03:14:10,193 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 03:14:10,193 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 03:14:10,194 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 03:14:10,195 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 03:14:10,196 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 03:14:10,197 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 03:14:10,224 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 03:14:10,224 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 03:14:10,225 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 03:14:10,225 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 03:14:10,226 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 03:14:10,226 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 03:14:10,226 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 03:14:10,226 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 03:14:10,226 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 03:14:10,227 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 03:14:10,227 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 03:14:10,228 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 03:14:10,228 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 03:14:10,228 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 03:14:10,228 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 03:14:10,228 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 03:14:10,228 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 03:14:10,229 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 03:14:10,229 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 03:14:10,229 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 03:14:10,230 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 03:14:10,230 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 03:14:10,230 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 03:14:10,230 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 03:14:10,230 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 03:14:10,230 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 03:14:10,231 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 03:14:10,231 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 03:14:10,231 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 03:14:10,231 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 03:14:10,231 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 03:14:10,232 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 03:14:10,232 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 03:14:10,232 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 03:14:10,232 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 03:14:10,232 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 03:14:10,233 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 03:14:10,233 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 03:14:10,233 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 03:14:10,233 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 03:14:10,233 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 03:14:10,233 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 03:14:10,449 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 03:14:10,473 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 03:14:10,476 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 03:14:10,477 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 03:14:10,478 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 03:14:10,479 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem01_label54.c [2023-04-01 03:14:11,667 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 03:14:11,949 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 03:14:11,950 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem01_label54.c [2023-04-01 03:14:11,969 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6345a784c/6ff84681f0a448ffbaf5b07dd8758257/FLAG9da57ce45 [2023-04-01 03:14:11,985 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6345a784c/6ff84681f0a448ffbaf5b07dd8758257 [2023-04-01 03:14:11,987 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 03:14:11,989 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 03:14:11,993 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 03:14:11,993 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 03:14:11,996 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 03:14:11,996 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 03:14:11" (1/1) ... [2023-04-01 03:14:11,998 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e8bf122 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:14:11, skipping insertion in model container [2023-04-01 03:14:11,998 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 03:14:11" (1/1) ... [2023-04-01 03:14:12,004 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 03:14:12,055 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 03:14:12,412 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/Problem01_label54.c[20718,20731] [2023-04-01 03:14:12,438 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 03:14:12,449 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 03:14:12,542 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/Problem01_label54.c[20718,20731] [2023-04-01 03:14:12,568 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 03:14:12,582 INFO L208 MainTranslator]: Completed translation [2023-04-01 03:14:12,582 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:14:12 WrapperNode [2023-04-01 03:14:12,582 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 03:14:12,584 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 03:14:12,584 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 03:14:12,584 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 03:14:12,606 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:14:12" (1/1) ... [2023-04-01 03:14:12,607 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:14:12" (1/1) ... [2023-04-01 03:14:12,624 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:14:12" (1/1) ... [2023-04-01 03:14:12,624 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:14:12" (1/1) ... [2023-04-01 03:14:12,670 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:14:12" (1/1) ... [2023-04-01 03:14:12,678 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:14:12" (1/1) ... [2023-04-01 03:14:12,685 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:14:12" (1/1) ... [2023-04-01 03:14:12,689 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:14:12" (1/1) ... [2023-04-01 03:14:12,696 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 03:14:12,697 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 03:14:12,697 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 03:14:12,697 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 03:14:12,700 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:14:12" (1/1) ... [2023-04-01 03:14:12,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 03:14:12,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:14:12,740 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 03:14:12,748 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 03:14:12,781 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 03:14:12,781 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 03:14:12,781 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 03:14:12,782 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 03:14:12,783 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 03:14:12,783 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 03:14:12,783 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 03:14:12,783 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 03:14:12,783 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 03:14:12,783 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 03:14:12,783 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 03:14:12,783 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 03:14:12,783 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 03:14:12,783 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 03:14:12,784 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 03:14:12,784 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 03:14:12,784 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 03:14:12,784 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 03:14:12,784 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 03:14:12,876 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 03:14:12,878 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 03:14:13,876 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 03:14:14,090 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 03:14:14,090 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 03:14:14,093 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 03:14:14 BoogieIcfgContainer [2023-04-01 03:14:14,093 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 03:14:14,096 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 03:14:14,096 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 03:14:14,099 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 03:14:14,099 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 03:14:11" (1/3) ... [2023-04-01 03:14:14,100 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@694e452e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 03:14:14, skipping insertion in model container [2023-04-01 03:14:14,100 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:14:12" (2/3) ... [2023-04-01 03:14:14,100 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@694e452e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 03:14:14, skipping insertion in model container [2023-04-01 03:14:14,100 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 03:14:14" (3/3) ... [2023-04-01 03:14:14,104 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem01_label54.c [2023-04-01 03:14:14,121 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 03:14:14,121 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 03:14:14,178 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 03:14:14,184 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;@40fbd124, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 03:14:14,184 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 03:14:14,188 INFO L276 IsEmpty]: Start isEmpty. Operand has 86 states, 78 states have (on average 1.8974358974358974) internal successors, (148), 79 states have internal predecessors, (148), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 03:14:14,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-04-01 03:14:14,201 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:14:14,202 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:14:14,203 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:14:14,209 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:14:14,209 INFO L85 PathProgramCache]: Analyzing trace with hash 1124020099, now seen corresponding path program 1 times [2023-04-01 03:14:14,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:14:14,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037957270] [2023-04-01 03:14:14,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:14:14,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:14:14,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:14:15,011 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 03:14:15,012 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:14:15,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037957270] [2023-04-01 03:14:15,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037957270] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 03:14:15,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 03:14:15,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 03:14:15,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282212098] [2023-04-01 03:14:15,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 03:14:15,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 03:14:15,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:14:15,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 03:14:15,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 03:14:15,042 INFO L87 Difference]: Start difference. First operand has 86 states, 78 states have (on average 1.8974358974358974) internal successors, (148), 79 states have internal predecessors, (148), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 2 states have internal predecessors, (73), 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 03:14:15,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:14:15,448 INFO L93 Difference]: Finished difference Result 246 states and 454 transitions. [2023-04-01 03:14:15,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 03:14:15,450 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 2 states have internal predecessors, (73), 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 77 [2023-04-01 03:14:15,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:14:15,461 INFO L225 Difference]: With dead ends: 246 [2023-04-01 03:14:15,461 INFO L226 Difference]: Without dead ends: 157 [2023-04-01 03:14:15,464 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 03:14:15,467 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 38 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 03:14:15,468 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 30 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 03:14:15,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2023-04-01 03:14:15,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2023-04-01 03:14:15,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 149 states have (on average 1.8926174496644295) internal successors, (282), 149 states have internal predecessors, (282), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-04-01 03:14:15,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 291 transitions. [2023-04-01 03:14:15,517 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 291 transitions. Word has length 77 [2023-04-01 03:14:15,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:14:15,517 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 291 transitions. [2023-04-01 03:14:15,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 2 states have internal predecessors, (73), 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 03:14:15,518 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 291 transitions. [2023-04-01 03:14:15,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-04-01 03:14:15,522 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:14:15,522 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-01 03:14:15,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 03:14:15,523 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:14:15,523 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:14:15,523 INFO L85 PathProgramCache]: Analyzing trace with hash -1608707579, now seen corresponding path program 1 times [2023-04-01 03:14:15,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:14:15,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156343631] [2023-04-01 03:14:15,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:14:15,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:14:15,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:14:15,958 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:14:15,958 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:14:15,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156343631] [2023-04-01 03:14:15,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156343631] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 03:14:15,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 03:14:15,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 03:14:15,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154634758] [2023-04-01 03:14:15,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 03:14:15,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 03:14:15,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:14:15,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 03:14:15,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 03:14:15,964 INFO L87 Difference]: Start difference. First operand 157 states and 291 transitions. Second operand has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 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 03:14:16,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:14:16,451 INFO L93 Difference]: Finished difference Result 477 states and 896 transitions. [2023-04-01 03:14:16,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 03:14:16,453 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 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 94 [2023-04-01 03:14:16,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:14:16,456 INFO L225 Difference]: With dead ends: 477 [2023-04-01 03:14:16,456 INFO L226 Difference]: Without dead ends: 325 [2023-04-01 03:14:16,458 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 03:14:16,459 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 251 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 03:14:16,459 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [251 Valid, 49 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 03:14:16,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2023-04-01 03:14:16,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 317. [2023-04-01 03:14:16,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 300 states have (on average 1.6066666666666667) internal successors, (482), 305 states have internal predecessors, (482), 6 states have call successors, (6), 6 states have call predecessors, (6), 10 states have return successors, (20), 5 states have call predecessors, (20), 5 states have call successors, (20) [2023-04-01 03:14:16,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 508 transitions. [2023-04-01 03:14:16,509 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 508 transitions. Word has length 94 [2023-04-01 03:14:16,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:14:16,509 INFO L495 AbstractCegarLoop]: Abstraction has 317 states and 508 transitions. [2023-04-01 03:14:16,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 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 03:14:16,510 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 508 transitions. [2023-04-01 03:14:16,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2023-04-01 03:14:16,514 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:14:16,514 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-04-01 03:14:16,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 03:14:16,514 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:14:16,515 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:14:16,515 INFO L85 PathProgramCache]: Analyzing trace with hash -688639557, now seen corresponding path program 1 times [2023-04-01 03:14:16,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:14:16,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902787088] [2023-04-01 03:14:16,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:14:16,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:14:16,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:14:16,782 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 24 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 03:14:16,783 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:14:16,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902787088] [2023-04-01 03:14:16,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902787088] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 03:14:16,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219010693] [2023-04-01 03:14:16,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:14:16,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:14:16,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:14:16,797 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 03:14:16,819 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 03:14:16,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:14:16,943 INFO L262 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 03:14:16,949 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:14:17,041 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-01 03:14:17,042 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 03:14:17,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219010693] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 03:14:17,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 03:14:17,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-04-01 03:14:17,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999904158] [2023-04-01 03:14:17,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 03:14:17,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 03:14:17,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:14:17,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 03:14:17,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-01 03:14:17,070 INFO L87 Difference]: Start difference. First operand 317 states and 508 transitions. Second operand has 5 states, 5 states have (on average 17.2) internal successors, (86), 4 states have internal predecessors, (86), 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 03:14:17,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:14:17,553 INFO L93 Difference]: Finished difference Result 811 states and 1365 transitions. [2023-04-01 03:14:17,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 03:14:17,554 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 4 states have internal predecessors, (86), 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 107 [2023-04-01 03:14:17,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:14:17,561 INFO L225 Difference]: With dead ends: 811 [2023-04-01 03:14:17,562 INFO L226 Difference]: Without dead ends: 499 [2023-04-01 03:14:17,566 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 106 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 03:14:17,568 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 235 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 494 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 03:14:17,570 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [235 Valid, 37 Invalid, 614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 494 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 03:14:17,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2023-04-01 03:14:17,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 475. [2023-04-01 03:14:17,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 475 states, 450 states have (on average 1.551111111111111) internal successors, (698), 459 states have internal predecessors, (698), 8 states have call successors, (8), 8 states have call predecessors, (8), 16 states have return successors, (44), 7 states have call predecessors, (44), 7 states have call successors, (44) [2023-04-01 03:14:17,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 750 transitions. [2023-04-01 03:14:17,619 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 750 transitions. Word has length 107 [2023-04-01 03:14:17,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:14:17,620 INFO L495 AbstractCegarLoop]: Abstraction has 475 states and 750 transitions. [2023-04-01 03:14:17,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 4 states have internal predecessors, (86), 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 03:14:17,621 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 750 transitions. [2023-04-01 03:14:17,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2023-04-01 03:14:17,633 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:14:17,634 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:14:17,645 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 03:14:17,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:14:17,843 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:14:17,843 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:14:17,844 INFO L85 PathProgramCache]: Analyzing trace with hash 135054535, now seen corresponding path program 1 times [2023-04-01 03:14:17,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:14:17,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373579423] [2023-04-01 03:14:17,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:14:17,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:14:17,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:14:18,295 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 30 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 03:14:18,295 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:14:18,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373579423] [2023-04-01 03:14:18,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373579423] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 03:14:18,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161337887] [2023-04-01 03:14:18,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:14:18,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:14:18,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:14:18,300 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 03:14:18,324 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 03:14:18,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:14:18,446 INFO L262 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 03:14:18,450 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:14:18,569 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-04-01 03:14:18,569 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 03:14:18,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161337887] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 03:14:18,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 03:14:18,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-04-01 03:14:18,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041504815] [2023-04-01 03:14:18,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 03:14:18,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 03:14:18,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:14:18,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 03:14:18,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-01 03:14:18,572 INFO L87 Difference]: Start difference. First operand 475 states and 750 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 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 03:14:18,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:14:18,809 INFO L93 Difference]: Finished difference Result 1099 states and 1814 transitions. [2023-04-01 03:14:18,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 03:14:18,810 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 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 113 [2023-04-01 03:14:18,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:14:18,813 INFO L225 Difference]: With dead ends: 1099 [2023-04-01 03:14:18,813 INFO L226 Difference]: Without dead ends: 629 [2023-04-01 03:14:18,815 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 114 SyntacticMatches, 0 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 03:14:18,816 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 6 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 03:14:18,816 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 130 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 03:14:18,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2023-04-01 03:14:18,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 473. [2023-04-01 03:14:18,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 449 states have (on average 1.510022271714922) internal successors, (678), 457 states have internal predecessors, (678), 8 states have call successors, (8), 8 states have call predecessors, (8), 15 states have return successors, (36), 7 states have call predecessors, (36), 7 states have call successors, (36) [2023-04-01 03:14:18,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 722 transitions. [2023-04-01 03:14:18,836 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 722 transitions. Word has length 113 [2023-04-01 03:14:18,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:14:18,837 INFO L495 AbstractCegarLoop]: Abstraction has 473 states and 722 transitions. [2023-04-01 03:14:18,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 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 03:14:18,837 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 722 transitions. [2023-04-01 03:14:18,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2023-04-01 03:14:18,839 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:14:18,839 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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, 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] [2023-04-01 03:14:18,848 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 03:14:19,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-04-01 03:14:19,048 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:14:19,048 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:14:19,048 INFO L85 PathProgramCache]: Analyzing trace with hash 925418071, now seen corresponding path program 1 times [2023-04-01 03:14:19,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:14:19,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312705605] [2023-04-01 03:14:19,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:14:19,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:14:19,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:14:19,569 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 57 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 03:14:19,569 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:14:19,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312705605] [2023-04-01 03:14:19,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312705605] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 03:14:19,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154141623] [2023-04-01 03:14:19,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:14:19,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:14:19,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:14:19,571 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 03:14:19,595 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 03:14:19,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:14:19,709 INFO L262 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-01 03:14:19,719 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:14:19,819 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 58 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-01 03:14:19,819 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 03:14:20,051 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-01 03:14:20,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154141623] provided 1 perfect and 1 imperfect interpolant sequences [2023-04-01 03:14:20,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-04-01 03:14:20,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 9 [2023-04-01 03:14:20,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943906210] [2023-04-01 03:14:20,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 03:14:20,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 03:14:20,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:14:20,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 03:14:20,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-04-01 03:14:20,054 INFO L87 Difference]: Start difference. First operand 473 states and 722 transitions. Second operand has 5 states, 5 states have (on average 23.6) internal successors, (118), 4 states have internal predecessors, (118), 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 03:14:20,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:14:20,404 INFO L93 Difference]: Finished difference Result 1192 states and 1807 transitions. [2023-04-01 03:14:20,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 03:14:20,405 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 23.6) internal successors, (118), 4 states have internal predecessors, (118), 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 140 [2023-04-01 03:14:20,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:14:20,408 INFO L225 Difference]: With dead ends: 1192 [2023-04-01 03:14:20,409 INFO L226 Difference]: Without dead ends: 724 [2023-04-01 03:14:20,410 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 273 SyntacticMatches, 5 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2023-04-01 03:14:20,410 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 149 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 03:14:20,410 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 41 Invalid, 451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 03:14:20,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 724 states. [2023-04-01 03:14:20,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 724 to 722. [2023-04-01 03:14:20,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 722 states, 680 states have (on average 1.4426470588235294) internal successors, (981), 700 states have internal predecessors, (981), 11 states have call successors, (11), 11 states have call predecessors, (11), 30 states have return successors, (80), 10 states have call predecessors, (80), 10 states have call successors, (80) [2023-04-01 03:14:20,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 722 states to 722 states and 1072 transitions. [2023-04-01 03:14:20,434 INFO L78 Accepts]: Start accepts. Automaton has 722 states and 1072 transitions. Word has length 140 [2023-04-01 03:14:20,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:14:20,434 INFO L495 AbstractCegarLoop]: Abstraction has 722 states and 1072 transitions. [2023-04-01 03:14:20,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.6) internal successors, (118), 4 states have internal predecessors, (118), 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 03:14:20,434 INFO L276 IsEmpty]: Start isEmpty. Operand 722 states and 1072 transitions. [2023-04-01 03:14:20,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2023-04-01 03:14:20,437 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:14:20,437 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 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, 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] [2023-04-01 03:14:20,445 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 03:14:20,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:14:20,645 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:14:20,646 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:14:20,646 INFO L85 PathProgramCache]: Analyzing trace with hash 988178825, now seen corresponding path program 1 times [2023-04-01 03:14:20,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:14:20,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186228094] [2023-04-01 03:14:20,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:14:20,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:14:20,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:14:20,821 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 78 proven. 19 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-01 03:14:20,822 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:14:20,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186228094] [2023-04-01 03:14:20,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186228094] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 03:14:20,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696961332] [2023-04-01 03:14:20,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:14:20,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:14:20,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:14:20,823 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 03:14:20,849 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 03:14:20,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:14:20,965 INFO L262 TraceCheckSpWp]: Trace formula consists of 564 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 03:14:20,968 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:14:21,020 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 62 proven. 2 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-04-01 03:14:21,021 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 03:14:21,114 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 78 proven. 19 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-01 03:14:21,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696961332] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 03:14:21,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1303164092] [2023-04-01 03:14:21,142 INFO L159 IcfgInterpreter]: Started Sifa with 81 locations of interest [2023-04-01 03:14:21,142 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 03:14:21,146 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 03:14:21,150 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 03:14:21,150 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 03:14:21,480 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 72 for LOIs [2023-04-01 03:14:43,901 WARN L223 SmtUtils]: Spent 18.86s on a formula simplification that was a NOOP. DAG size: 1347 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2023-04-01 03:15:11,839 WARN L223 SmtUtils]: Spent 16.67s on a formula simplification that was a NOOP. DAG size: 1347 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm)