/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 EqDomain -i ../sv-benchmarks/c/eca-rers2012/Problem03_label20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 09:24:19,065 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 09:24:19,067 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 09:24:19,105 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 09:24:19,106 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 09:24:19,108 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 09:24:19,111 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 09:24:19,113 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 09:24:19,114 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 09:24:19,119 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 09:24:19,120 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 09:24:19,122 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 09:24:19,122 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 09:24:19,125 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 09:24:19,127 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 09:24:19,129 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 09:24:19,129 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 09:24:19,130 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 09:24:19,132 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 09:24:19,136 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 09:24:19,137 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 09:24:19,138 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 09:24:19,138 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 09:24:19,139 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 09:24:19,141 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 09:24:19,141 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 09:24:19,142 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 09:24:19,142 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 09:24:19,143 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 09:24:19,143 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 09:24:19,143 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 09:24:19,144 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 09:24:19,144 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 09:24:19,145 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 09:24:19,145 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 09:24:19,146 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 09:24:19,146 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 09:24:19,146 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 09:24:19,146 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 09:24:19,147 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 09:24:19,147 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 09:24:19,148 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 09:24:19,170 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 09:24:19,171 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 09:24:19,171 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 09:24:19,171 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 09:24:19,172 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 09:24:19,172 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 09:24:19,172 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 09:24:19,172 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 09:24:19,172 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 09:24:19,173 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 09:24:19,173 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 09:24:19,173 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 09:24:19,173 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 09:24:19,174 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 09:24:19,174 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 09:24:19,174 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 09:24:19,174 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 09:24:19,174 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 09:24:19,175 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 09:24:19,175 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 09:24:19,175 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 09:24:19,175 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 09:24:19,175 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 09:24:19,175 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 09:24:19,176 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 09:24:19,176 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 09:24:19,176 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 09:24:19,176 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 09:24:19,176 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 09:24:19,176 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 09:24:19,177 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 09:24:19,177 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 09:24:19,177 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 09:24:19,177 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 09:24:19,177 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 09:24:19,177 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 09:24:19,177 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 09:24:19,177 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 09:24:19,178 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 09:24:19,178 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 09:24:19,178 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 09:24:19,178 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 09:24:19,377 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 09:24:19,394 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 09:24:19,396 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 09:24:19,397 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 09:24:19,399 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 09:24:19,400 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem03_label20.c [2023-04-01 09:24:20,493 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 09:24:20,832 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 09:24:20,832 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label20.c [2023-04-01 09:24:20,845 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a04fd711/fed388e6cbf74d06844ab082b3c9adde/FLAG73ef3ede6 [2023-04-01 09:24:20,859 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a04fd711/fed388e6cbf74d06844ab082b3c9adde [2023-04-01 09:24:20,862 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 09:24:20,864 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 09:24:20,867 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 09:24:20,867 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 09:24:20,870 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 09:24:20,870 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 09:24:20" (1/1) ... [2023-04-01 09:24:20,871 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c67f095 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:24:20, skipping insertion in model container [2023-04-01 09:24:20,871 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 09:24:20" (1/1) ... [2023-04-01 09:24:20,876 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 09:24:20,938 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 09:24:21,448 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/Problem03_label20.c[60555,60568] [2023-04-01 09:24:21,473 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 09:24:21,483 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 09:24:21,646 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/Problem03_label20.c[60555,60568] [2023-04-01 09:24:21,653 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 09:24:21,668 INFO L208 MainTranslator]: Completed translation [2023-04-01 09:24:21,669 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:24:21 WrapperNode [2023-04-01 09:24:21,669 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 09:24:21,670 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 09:24:21,670 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 09:24:21,671 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 09:24:21,680 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:24:21" (1/1) ... [2023-04-01 09:24:21,681 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:24:21" (1/1) ... [2023-04-01 09:24:21,709 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:24:21" (1/1) ... [2023-04-01 09:24:21,709 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:24:21" (1/1) ... [2023-04-01 09:24:21,790 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:24:21" (1/1) ... [2023-04-01 09:24:21,805 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:24:21" (1/1) ... [2023-04-01 09:24:21,819 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:24:21" (1/1) ... [2023-04-01 09:24:21,830 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:24:21" (1/1) ... [2023-04-01 09:24:21,844 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 09:24:21,845 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 09:24:21,845 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 09:24:21,845 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 09:24:21,846 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:24:21" (1/1) ... [2023-04-01 09:24:21,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 09:24:21,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:24:21,878 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 09:24:21,898 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 09:24:21,917 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 09:24:21,917 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 09:24:21,918 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 09:24:21,918 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 09:24:21,918 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 09:24:21,918 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 09:24:21,918 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 09:24:21,918 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 09:24:21,918 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 09:24:21,918 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 09:24:21,918 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 09:24:21,918 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 09:24:21,918 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 09:24:21,918 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 09:24:21,919 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 09:24:21,919 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 09:24:21,919 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 09:24:21,919 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 09:24:21,919 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 09:24:22,042 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 09:24:22,044 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 09:24:23,455 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 09:24:23,708 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 09:24:23,708 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 09:24:23,712 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 09:24:23 BoogieIcfgContainer [2023-04-01 09:24:23,712 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 09:24:23,716 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 09:24:23,716 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 09:24:23,718 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 09:24:23,718 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 09:24:20" (1/3) ... [2023-04-01 09:24:23,719 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@380a7df2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 09:24:23, skipping insertion in model container [2023-04-01 09:24:23,719 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:24:21" (2/3) ... [2023-04-01 09:24:23,719 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@380a7df2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 09:24:23, skipping insertion in model container [2023-04-01 09:24:23,719 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 09:24:23" (3/3) ... [2023-04-01 09:24:23,722 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label20.c [2023-04-01 09:24:23,738 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 09:24:23,739 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 09:24:23,793 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 09:24:23,800 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;@2a8eed9e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 09:24:23,800 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 09:24:23,805 INFO L276 IsEmpty]: Start isEmpty. Operand has 158 states, 150 states have (on average 1.9466666666666668) internal successors, (292), 151 states have internal predecessors, (292), 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 09:24:23,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2023-04-01 09:24:23,816 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:24:23,817 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:24:23,818 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:24:23,822 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:24:23,822 INFO L85 PathProgramCache]: Analyzing trace with hash 597542646, now seen corresponding path program 1 times [2023-04-01 09:24:23,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:24:23,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646687791] [2023-04-01 09:24:23,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:24:23,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:24:24,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:24:24,871 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 09:24:24,872 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:24:24,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646687791] [2023-04-01 09:24:24,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646687791] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:24:24,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 09:24:24,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 09:24:24,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636936825] [2023-04-01 09:24:24,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:24:24,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 09:24:24,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:24:24,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 09:24:24,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 09:24:24,922 INFO L87 Difference]: Start difference. First operand has 158 states, 150 states have (on average 1.9466666666666668) internal successors, (292), 151 states have internal predecessors, (292), 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 48.333333333333336) internal successors, (145), 2 states have internal predecessors, (145), 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 09:24:25,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:24:25,650 INFO L93 Difference]: Finished difference Result 462 states and 886 transitions. [2023-04-01 09:24:25,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 09:24:25,652 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 2 states have internal predecessors, (145), 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 149 [2023-04-01 09:24:25,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:24:25,663 INFO L225 Difference]: With dead ends: 462 [2023-04-01 09:24:25,663 INFO L226 Difference]: Without dead ends: 301 [2023-04-01 09:24:25,667 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 09:24:25,669 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 55 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-01 09:24:25,670 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 36 Invalid, 588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 489 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-01 09:24:25,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2023-04-01 09:24:25,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 301. [2023-04-01 09:24:25,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 293 states have (on average 1.89419795221843) internal successors, (555), 293 states have internal predecessors, (555), 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 09:24:25,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 564 transitions. [2023-04-01 09:24:25,720 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 564 transitions. Word has length 149 [2023-04-01 09:24:25,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:24:25,721 INFO L495 AbstractCegarLoop]: Abstraction has 301 states and 564 transitions. [2023-04-01 09:24:25,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 2 states have internal predecessors, (145), 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 09:24:25,722 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 564 transitions. [2023-04-01 09:24:25,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2023-04-01 09:24:25,726 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:24:25,726 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-01 09:24:25,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 09:24:25,727 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:24:25,727 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:24:25,727 INFO L85 PathProgramCache]: Analyzing trace with hash 15717296, now seen corresponding path program 1 times [2023-04-01 09:24:25,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:24:25,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356912321] [2023-04-01 09:24:25,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:24:25,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:24:25,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:24:26,196 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:24:26,196 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:24:26,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356912321] [2023-04-01 09:24:26,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356912321] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:24:26,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 09:24:26,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 09:24:26,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974658808] [2023-04-01 09:24:26,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:24:26,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 09:24:26,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:24:26,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 09:24:26,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 09:24:26,200 INFO L87 Difference]: Start difference. First operand 301 states and 564 transitions. Second operand has 5 states, 5 states have (on average 30.4) internal successors, (152), 4 states have internal predecessors, (152), 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 09:24:26,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:24:26,636 INFO L93 Difference]: Finished difference Result 913 states and 1729 transitions. [2023-04-01 09:24:26,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 09:24:26,637 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.4) internal successors, (152), 4 states have internal predecessors, (152), 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 158 [2023-04-01 09:24:26,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:24:26,642 INFO L225 Difference]: With dead ends: 913 [2023-04-01 09:24:26,642 INFO L226 Difference]: Without dead ends: 617 [2023-04-01 09:24:26,644 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 09:24:26,645 INFO L413 NwaCegarLoop]: 181 mSDtfsCounter, 773 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 773 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 09:24:26,645 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [773 Valid, 529 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 338 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 09:24:26,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2023-04-01 09:24:26,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 603. [2023-04-01 09:24:26,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 603 states, 587 states have (on average 1.8824531516183987) internal successors, (1105), 591 states have internal predecessors, (1105), 6 states have call successors, (6), 6 states have call predecessors, (6), 9 states have return successors, (23), 5 states have call predecessors, (23), 5 states have call successors, (23) [2023-04-01 09:24:26,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 1134 transitions. [2023-04-01 09:24:26,682 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 1134 transitions. Word has length 158 [2023-04-01 09:24:26,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:24:26,682 INFO L495 AbstractCegarLoop]: Abstraction has 603 states and 1134 transitions. [2023-04-01 09:24:26,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.4) internal successors, (152), 4 states have internal predecessors, (152), 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 09:24:26,682 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 1134 transitions. [2023-04-01 09:24:26,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2023-04-01 09:24:26,687 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:24:26,687 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-01 09:24:26,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 09:24:26,687 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:24:26,688 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:24:26,688 INFO L85 PathProgramCache]: Analyzing trace with hash -848539947, now seen corresponding path program 1 times [2023-04-01 09:24:26,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:24:26,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604692237] [2023-04-01 09:24:26,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:24:26,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:24:26,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:24:27,086 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:24:27,087 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:24:27,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604692237] [2023-04-01 09:24:27,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604692237] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:24:27,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 09:24:27,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 09:24:27,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869421354] [2023-04-01 09:24:27,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:24:27,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 09:24:27,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:24:27,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 09:24:27,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 09:24:27,089 INFO L87 Difference]: Start difference. First operand 603 states and 1134 transitions. Second operand has 5 states, 5 states have (on average 31.0) internal successors, (155), 4 states have internal predecessors, (155), 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 09:24:27,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:24:27,856 INFO L93 Difference]: Finished difference Result 1861 states and 3585 transitions. [2023-04-01 09:24:27,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 09:24:27,857 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.0) internal successors, (155), 4 states have internal predecessors, (155), 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 161 [2023-04-01 09:24:27,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:24:27,863 INFO L225 Difference]: With dead ends: 1861 [2023-04-01 09:24:27,863 INFO L226 Difference]: Without dead ends: 1263 [2023-04-01 09:24:27,865 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 09:24:27,866 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 493 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 872 mSolverCounterSat, 255 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 493 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 1127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 255 IncrementalHoareTripleChecker+Valid, 872 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-01 09:24:27,866 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [493 Valid, 44 Invalid, 1127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [255 Valid, 872 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-01 09:24:27,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1263 states. [2023-04-01 09:24:27,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1263 to 1231. [2023-04-01 09:24:27,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1231 states, 1187 states have (on average 1.818871103622578) internal successors, (2159), 1211 states have internal predecessors, (2159), 10 states have call successors, (10), 10 states have call predecessors, (10), 33 states have return successors, (115), 9 states have call predecessors, (115), 9 states have call successors, (115) [2023-04-01 09:24:27,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1231 states to 1231 states and 2284 transitions. [2023-04-01 09:24:27,913 INFO L78 Accepts]: Start accepts. Automaton has 1231 states and 2284 transitions. Word has length 161 [2023-04-01 09:24:27,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:24:27,914 INFO L495 AbstractCegarLoop]: Abstraction has 1231 states and 2284 transitions. [2023-04-01 09:24:27,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.0) internal successors, (155), 4 states have internal predecessors, (155), 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 09:24:27,914 INFO L276 IsEmpty]: Start isEmpty. Operand 1231 states and 2284 transitions. [2023-04-01 09:24:27,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2023-04-01 09:24:27,919 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:24:27,919 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-01 09:24:27,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 09:24:27,919 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:24:27,920 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:24:27,920 INFO L85 PathProgramCache]: Analyzing trace with hash 973406440, now seen corresponding path program 1 times [2023-04-01 09:24:27,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:24:27,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775648401] [2023-04-01 09:24:27,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:24:27,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:24:27,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:24:28,322 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:24:28,322 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:24:28,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775648401] [2023-04-01 09:24:28,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775648401] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:24:28,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 09:24:28,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 09:24:28,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691028089] [2023-04-01 09:24:28,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:24:28,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 09:24:28,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:24:28,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 09:24:28,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 09:24:28,325 INFO L87 Difference]: Start difference. First operand 1231 states and 2284 transitions. Second operand has 5 states, 5 states have (on average 31.2) internal successors, (156), 4 states have internal predecessors, (156), 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 09:24:29,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:24:29,127 INFO L93 Difference]: Finished difference Result 3841 states and 7497 transitions. [2023-04-01 09:24:29,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 09:24:29,129 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.2) internal successors, (156), 4 states have internal predecessors, (156), 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 162 [2023-04-01 09:24:29,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:24:29,143 INFO L225 Difference]: With dead ends: 3841 [2023-04-01 09:24:29,143 INFO L226 Difference]: Without dead ends: 2615 [2023-04-01 09:24:29,146 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 09:24:29,147 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 558 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 867 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 558 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 992 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 867 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-01 09:24:29,148 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [558 Valid, 44 Invalid, 992 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 867 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-01 09:24:29,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2615 states. [2023-04-01 09:24:29,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2615 to 2565. [2023-04-01 09:24:29,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2565 states, 2426 states have (on average 1.6760098928276999) internal successors, (4066), 2529 states have internal predecessors, (4066), 18 states have call successors, (18), 18 states have call predecessors, (18), 120 states have return successors, (438), 17 states have call predecessors, (438), 17 states have call successors, (438) [2023-04-01 09:24:29,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2565 states to 2565 states and 4522 transitions. [2023-04-01 09:24:29,279 INFO L78 Accepts]: Start accepts. Automaton has 2565 states and 4522 transitions. Word has length 162 [2023-04-01 09:24:29,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:24:29,280 INFO L495 AbstractCegarLoop]: Abstraction has 2565 states and 4522 transitions. [2023-04-01 09:24:29,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.2) internal successors, (156), 4 states have internal predecessors, (156), 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 09:24:29,280 INFO L276 IsEmpty]: Start isEmpty. Operand 2565 states and 4522 transitions. [2023-04-01 09:24:29,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2023-04-01 09:24:29,288 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:24:29,288 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-01 09:24:29,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 09:24:29,289 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:24:29,289 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:24:29,289 INFO L85 PathProgramCache]: Analyzing trace with hash 1089874609, now seen corresponding path program 1 times [2023-04-01 09:24:29,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:24:29,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196674546] [2023-04-01 09:24:29,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:24:29,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:24:29,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:24:29,960 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:24:29,961 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:24:29,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196674546] [2023-04-01 09:24:29,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196674546] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:24:29,961 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 09:24:29,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 09:24:29,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932382071] [2023-04-01 09:24:29,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:24:29,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 09:24:29,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:24:29,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 09:24:29,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 09:24:29,963 INFO L87 Difference]: Start difference. First operand 2565 states and 4522 transitions. Second operand has 5 states, 5 states have (on average 31.4) internal successors, (157), 4 states have internal predecessors, (157), 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 09:24:30,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:24:30,847 INFO L93 Difference]: Finished difference Result 6549 states and 11823 transitions. [2023-04-01 09:24:30,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 09:24:30,848 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 4 states have internal predecessors, (157), 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 163 [2023-04-01 09:24:30,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:24:30,868 INFO L225 Difference]: With dead ends: 6549 [2023-04-01 09:24:30,869 INFO L226 Difference]: Without dead ends: 3989 [2023-04-01 09:24:30,875 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 09:24:30,876 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 489 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 866 mSolverCounterSat, 249 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 489 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 1115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 249 IncrementalHoareTripleChecker+Valid, 866 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-04-01 09:24:30,877 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [489 Valid, 46 Invalid, 1115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [249 Valid, 866 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-04-01 09:24:30,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3989 states. [2023-04-01 09:24:31,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3989 to 3891. [2023-04-01 09:24:31,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3891 states, 3661 states have (on average 1.6293362469270691) internal successors, (5965), 3839 states have internal predecessors, (5965), 26 states have call successors, (26), 26 states have call predecessors, (26), 203 states have return successors, (770), 25 states have call predecessors, (770), 25 states have call successors, (770) [2023-04-01 09:24:31,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3891 states to 3891 states and 6761 transitions. [2023-04-01 09:24:31,038 INFO L78 Accepts]: Start accepts. Automaton has 3891 states and 6761 transitions. Word has length 163 [2023-04-01 09:24:31,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:24:31,039 INFO L495 AbstractCegarLoop]: Abstraction has 3891 states and 6761 transitions. [2023-04-01 09:24:31,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 4 states have internal predecessors, (157), 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 09:24:31,039 INFO L276 IsEmpty]: Start isEmpty. Operand 3891 states and 6761 transitions. [2023-04-01 09:24:31,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2023-04-01 09:24:31,049 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:24:31,049 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:24:31,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 09:24:31,049 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:24:31,050 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:24:31,050 INFO L85 PathProgramCache]: Analyzing trace with hash 153697112, now seen corresponding path program 1 times [2023-04-01 09:24:31,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:24:31,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936618420] [2023-04-01 09:24:31,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:24:31,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:24:31,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:24:32,646 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:24:32,646 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:24:32,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936618420] [2023-04-01 09:24:32,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936618420] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 09:24:32,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564883281] [2023-04-01 09:24:32,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:24:32,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:24:32,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:24:32,653 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 09:24:32,655 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 09:24:32,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:24:32,887 INFO L262 TraceCheckSpWp]: Trace formula consists of 911 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-01 09:24:32,901 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:24:33,169 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:24:33,169 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 09:24:33,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564883281] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:24:33,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 09:24:33,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-04-01 09:24:33,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018851034] [2023-04-01 09:24:33,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:24:33,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 09:24:33,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:24:33,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 09:24:33,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-04-01 09:24:33,172 INFO L87 Difference]: Start difference. First operand 3891 states and 6761 transitions. Second operand has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 09:24:33,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:24:33,932 INFO L93 Difference]: Finished difference Result 11008 states and 19852 transitions. [2023-04-01 09:24:33,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 09:24:33,933 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 170 [2023-04-01 09:24:33,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:24:33,973 INFO L225 Difference]: With dead ends: 11008 [2023-04-01 09:24:33,973 INFO L226 Difference]: Without dead ends: 7122 [2023-04-01 09:24:33,985 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-04-01 09:24:33,986 INFO L413 NwaCegarLoop]: 273 mSDtfsCounter, 14 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 483 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-01 09:24:33,986 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 286 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 483 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-01 09:24:33,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7122 states. [2023-04-01 09:24:34,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7122 to 7114. [2023-04-01 09:24:34,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7114 states, 6774 states have (on average 1.5490109241216417) internal successors, (10493), 7020 states have internal predecessors, (10493), 47 states have call successors, (47), 47 states have call predecessors, (47), 292 states have return successors, (1610), 46 states have call predecessors, (1610), 46 states have call successors, (1610) [2023-04-01 09:24:34,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7114 states to 7114 states and 12150 transitions. [2023-04-01 09:24:34,270 INFO L78 Accepts]: Start accepts. Automaton has 7114 states and 12150 transitions. Word has length 170 [2023-04-01 09:24:34,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:24:34,270 INFO L495 AbstractCegarLoop]: Abstraction has 7114 states and 12150 transitions. [2023-04-01 09:24:34,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 09:24:34,271 INFO L276 IsEmpty]: Start isEmpty. Operand 7114 states and 12150 transitions. [2023-04-01 09:24:34,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2023-04-01 09:24:34,289 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:24:34,289 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:24:34,301 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 09:24:34,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-04-01 09:24:34,497 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:24:34,497 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:24:34,497 INFO L85 PathProgramCache]: Analyzing trace with hash -165278106, now seen corresponding path program 1 times [2023-04-01 09:24:34,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:24:34,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809437671] [2023-04-01 09:24:34,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:24:34,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:24:34,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:24:35,091 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:24:35,091 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:24:35,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809437671] [2023-04-01 09:24:35,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809437671] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:24:35,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 09:24:35,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 09:24:35,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539570903] [2023-04-01 09:24:35,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:24:35,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 09:24:35,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:24:35,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 09:24:35,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 09:24:35,095 INFO L87 Difference]: Start difference. First operand 7114 states and 12150 transitions. Second operand has 5 states, 5 states have (on average 35.0) internal successors, (175), 4 states have internal predecessors, (175), 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 09:24:36,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:24:36,235 INFO L93 Difference]: Finished difference Result 16768 states and 28701 transitions. [2023-04-01 09:24:36,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 09:24:36,236 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 35.0) internal successors, (175), 4 states have internal predecessors, (175), 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 181 [2023-04-01 09:24:36,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:24:36,311 INFO L225 Difference]: With dead ends: 16768 [2023-04-01 09:24:36,311 INFO L226 Difference]: Without dead ends: 9659 [2023-04-01 09:24:36,347 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 09:24:36,348 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 437 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 986 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 437 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 1179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 986 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-04-01 09:24:36,348 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [437 Valid, 46 Invalid, 1179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 986 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-04-01 09:24:36,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9659 states. [2023-04-01 09:24:36,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9659 to 9589. [2023-04-01 09:24:36,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9589 states, 9084 states have (on average 1.5308234258036106) internal successors, (13906), 9465 states have internal predecessors, (13906), 62 states have call successors, (62), 62 states have call predecessors, (62), 442 states have return successors, (2271), 61 states have call predecessors, (2271), 61 states have call successors, (2271) [2023-04-01 09:24:36,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9589 states to 9589 states and 16239 transitions. [2023-04-01 09:24:36,742 INFO L78 Accepts]: Start accepts. Automaton has 9589 states and 16239 transitions. Word has length 181 [2023-04-01 09:24:36,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:24:36,743 INFO L495 AbstractCegarLoop]: Abstraction has 9589 states and 16239 transitions. [2023-04-01 09:24:36,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 35.0) internal successors, (175), 4 states have internal predecessors, (175), 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 09:24:36,744 INFO L276 IsEmpty]: Start isEmpty. Operand 9589 states and 16239 transitions. [2023-04-01 09:24:36,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2023-04-01 09:24:36,773 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:24:36,773 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:24:36,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-01 09:24:36,773 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:24:36,774 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:24:36,774 INFO L85 PathProgramCache]: Analyzing trace with hash 271444280, now seen corresponding path program 1 times [2023-04-01 09:24:36,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:24:36,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274463384] [2023-04-01 09:24:36,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:24:36,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:24:36,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:24:37,172 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:24:37,173 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:24:37,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274463384] [2023-04-01 09:24:37,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274463384] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:24:37,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 09:24:37,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 09:24:37,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031938467] [2023-04-01 09:24:37,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:24:37,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 09:24:37,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:24:37,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 09:24:37,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 09:24:37,175 INFO L87 Difference]: Start difference. First operand 9589 states and 16239 transitions. Second operand has 5 states, 5 states have (on average 36.0) internal successors, (180), 4 states have internal predecessors, (180), 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 09:24:38,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:24:38,191 INFO L93 Difference]: Finished difference Result 24677 states and 44903 transitions. [2023-04-01 09:24:38,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 09:24:38,191 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 36.0) internal successors, (180), 4 states have internal predecessors, (180), 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 186 [2023-04-01 09:24:38,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:24:38,283 INFO L225 Difference]: With dead ends: 24677 [2023-04-01 09:24:38,283 INFO L226 Difference]: Without dead ends: 15093 [2023-04-01 09:24:38,313 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 09:24:38,315 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 509 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 875 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 509 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 1026 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 875 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-01 09:24:38,317 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [509 Valid, 45 Invalid, 1026 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 875 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-01 09:24:38,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15093 states. [2023-04-01 09:24:38,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15093 to 14867. [2023-04-01 09:24:38,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14867 states, 14011 states have (on average 1.4963956891014203) internal successors, (20966), 14679 states have internal predecessors, (20966), 94 states have call successors, (94), 94 states have call predecessors, (94), 761 states have return successors, (4005), 93 states have call predecessors, (4005), 93 states have call successors, (4005) [2023-04-01 09:24:38,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14867 states to 14867 states and 25065 transitions. [2023-04-01 09:24:38,883 INFO L78 Accepts]: Start accepts. Automaton has 14867 states and 25065 transitions. Word has length 186 [2023-04-01 09:24:38,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:24:38,883 INFO L495 AbstractCegarLoop]: Abstraction has 14867 states and 25065 transitions. [2023-04-01 09:24:38,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 36.0) internal successors, (180), 4 states have internal predecessors, (180), 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 09:24:38,884 INFO L276 IsEmpty]: Start isEmpty. Operand 14867 states and 25065 transitions. [2023-04-01 09:24:38,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2023-04-01 09:24:38,919 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:24:38,920 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:24:38,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-01 09:24:38,921 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:24:38,922 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:24:38,922 INFO L85 PathProgramCache]: Analyzing trace with hash 1096271292, now seen corresponding path program 1 times [2023-04-01 09:24:38,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:24:38,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020566817] [2023-04-01 09:24:38,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:24:38,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:24:38,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:24:39,841 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 38 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:24:39,841 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:24:39,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020566817] [2023-04-01 09:24:39,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020566817] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 09:24:39,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267583431] [2023-04-01 09:24:39,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:24:39,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:24:39,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:24:39,849 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 09:24:39,869 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 09:24:40,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:24:40,096 INFO L262 TraceCheckSpWp]: Trace formula consists of 1072 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-01 09:24:40,101 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:24:40,261 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-01 09:24:40,262 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 09:24:40,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267583431] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:24:40,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 09:24:40,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2023-04-01 09:24:40,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352967499] [2023-04-01 09:24:40,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:24:40,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 09:24:40,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:24:40,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 09:24:40,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-04-01 09:24:40,264 INFO L87 Difference]: Start difference. First operand 14867 states and 25065 transitions. Second operand has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 3 states have internal predecessors, (178), 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 09:24:41,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:24:41,227 INFO L93 Difference]: Finished difference Result 41881 states and 73384 transitions. [2023-04-01 09:24:41,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 09:24:41,228 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 3 states have internal predecessors, (178), 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 192 [2023-04-01 09:24:41,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:24:41,373 INFO L225 Difference]: With dead ends: 41881 [2023-04-01 09:24:41,373 INFO L226 Difference]: Without dead ends: 27019 [2023-04-01 09:24:41,419 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-04-01 09:24:41,422 INFO L413 NwaCegarLoop]: 257 mSDtfsCounter, 9 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-01 09:24:41,422 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 282 Invalid, 586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 432 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-01 09:24:41,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27019 states. [2023-04-01 09:24:42,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27019 to 27019. [2023-04-01 09:24:42,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27019 states, 25807 states have (on average 1.4691362808540318) internal successors, (37914), 26671 states have internal predecessors, (37914), 174 states have call successors, (174), 174 states have call predecessors, (174), 1037 states have return successors, (8580), 173 states have call predecessors, (8580), 173 states have call successors, (8580) [2023-04-01 09:24:42,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27019 states to 27019 states and 46668 transitions. [2023-04-01 09:24:42,362 INFO L78 Accepts]: Start accepts. Automaton has 27019 states and 46668 transitions. Word has length 192 [2023-04-01 09:24:42,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:24:42,362 INFO L495 AbstractCegarLoop]: Abstraction has 27019 states and 46668 transitions. [2023-04-01 09:24:42,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 3 states have internal predecessors, (178), 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 09:24:42,363 INFO L276 IsEmpty]: Start isEmpty. Operand 27019 states and 46668 transitions. [2023-04-01 09:24:42,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2023-04-01 09:24:42,462 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:24:42,462 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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, 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] [2023-04-01 09:24:42,475 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 09:24:42,670 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,SelfDestructingSolverStorable8 [2023-04-01 09:24:42,670 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:24:42,671 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:24:42,671 INFO L85 PathProgramCache]: Analyzing trace with hash -1857450131, now seen corresponding path program 1 times [2023-04-01 09:24:42,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:24:42,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918837412] [2023-04-01 09:24:42,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:24:42,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:24:42,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:24:43,379 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 92 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:24:43,379 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:24:43,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918837412] [2023-04-01 09:24:43,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918837412] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 09:24:43,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074250404] [2023-04-01 09:24:43,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:24:43,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:24:43,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:24:43,381 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 09:24:43,384 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 09:24:43,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:24:43,700 INFO L262 TraceCheckSpWp]: Trace formula consists of 1123 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 09:24:43,705 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:24:43,882 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 76 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-04-01 09:24:43,882 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 09:24:43,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074250404] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:24:43,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 09:24:43,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2023-04-01 09:24:43,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715390124] [2023-04-01 09:24:43,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:24:43,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 09:24:43,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:24:43,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 09:24:43,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-04-01 09:24:43,884 INFO L87 Difference]: Start difference. First operand 27019 states and 46668 transitions. Second operand has 3 states, 3 states have (on average 68.0) internal successors, (204), 3 states have internal predecessors, (204), 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 09:24:44,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:24:44,886 INFO L93 Difference]: Finished difference Result 73172 states and 128194 transitions. [2023-04-01 09:24:44,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 09:24:44,886 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.0) internal successors, (204), 3 states have internal predecessors, (204), 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 228 [2023-04-01 09:24:44,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:24:45,122 INFO L225 Difference]: With dead ends: 73172 [2023-04-01 09:24:45,122 INFO L226 Difference]: Without dead ends: 46158 [2023-04-01 09:24:45,195 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 229 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-04-01 09:24:45,197 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 29 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-01 09:24:45,198 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 91 Invalid, 598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 508 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-01 09:24:45,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46158 states. [2023-04-01 09:24:46,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46158 to 46158. [2023-04-01 09:24:46,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46158 states, 44457 states have (on average 1.4091819061115234) internal successors, (62648), 45556 states have internal predecessors, (62648), 301 states have call successors, (301), 301 states have call predecessors, (301), 1399 states have return successors, (13825), 300 states have call predecessors, (13825), 300 states have call successors, (13825) [2023-04-01 09:24:46,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46158 states to 46158 states and 76774 transitions. [2023-04-01 09:24:46,743 INFO L78 Accepts]: Start accepts. Automaton has 46158 states and 76774 transitions. Word has length 228 [2023-04-01 09:24:46,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:24:46,744 INFO L495 AbstractCegarLoop]: Abstraction has 46158 states and 76774 transitions. [2023-04-01 09:24:46,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.0) internal successors, (204), 3 states have internal predecessors, (204), 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 09:24:46,744 INFO L276 IsEmpty]: Start isEmpty. Operand 46158 states and 76774 transitions. [2023-04-01 09:24:46,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2023-04-01 09:24:46,839 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:24:46,839 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 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] [2023-04-01 09:24:46,851 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 09:24:47,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:24:47,054 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:24:47,054 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:24:47,054 INFO L85 PathProgramCache]: Analyzing trace with hash 2019942451, now seen corresponding path program 1 times [2023-04-01 09:24:47,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:24:47,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964544064] [2023-04-01 09:24:47,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:24:47,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:24:47,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:24:48,301 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:24:48,301 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:24:48,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964544064] [2023-04-01 09:24:48,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964544064] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:24:48,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 09:24:48,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 09:24:48,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603017521] [2023-04-01 09:24:48,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:24:48,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 09:24:48,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:24:48,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 09:24:48,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 09:24:48,303 INFO L87 Difference]: Start difference. First operand 46158 states and 76774 transitions. Second operand has 5 states, 5 states have (on average 45.8) internal successors, (229), 4 states have internal predecessors, (229), 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 09:24:49,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:24:49,692 INFO L93 Difference]: Finished difference Result 94623 states and 157850 transitions. [2023-04-01 09:24:49,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 09:24:49,693 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 45.8) internal successors, (229), 4 states have internal predecessors, (229), 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 235 [2023-04-01 09:24:49,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:24:49,901 INFO L225 Difference]: With dead ends: 94623 [2023-04-01 09:24:49,901 INFO L226 Difference]: Without dead ends: 48470 [2023-04-01 09:24:49,963 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 09:24:49,964 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 287 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 1131 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 1204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 1131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-04-01 09:24:49,964 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [287 Valid, 45 Invalid, 1204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 1131 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-04-01 09:24:50,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48470 states. [2023-04-01 09:24:51,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48470 to 48446. [2023-04-01 09:24:51,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48446 states, 46602 states have (on average 1.4013561649714605) internal successors, (65306), 47816 states have internal predecessors, (65306), 315 states have call successors, (315), 315 states have call predecessors, (315), 1528 states have return successors, (14879), 314 states have call predecessors, (14879), 314 states have call successors, (14879) [2023-04-01 09:24:51,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48446 states to 48446 states and 80500 transitions. [2023-04-01 09:24:51,516 INFO L78 Accepts]: Start accepts. Automaton has 48446 states and 80500 transitions. Word has length 235 [2023-04-01 09:24:51,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:24:51,516 INFO L495 AbstractCegarLoop]: Abstraction has 48446 states and 80500 transitions. [2023-04-01 09:24:51,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 45.8) internal successors, (229), 4 states have internal predecessors, (229), 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 09:24:51,517 INFO L276 IsEmpty]: Start isEmpty. Operand 48446 states and 80500 transitions. [2023-04-01 09:24:51,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2023-04-01 09:24:51,623 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:24:51,623 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 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] [2023-04-01 09:24:51,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-04-01 09:24:51,624 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:24:51,624 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:24:51,624 INFO L85 PathProgramCache]: Analyzing trace with hash 1899273, now seen corresponding path program 1 times [2023-04-01 09:24:51,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:24:51,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849993524] [2023-04-01 09:24:51,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:24:51,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:24:52,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:24:52,769 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 92 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:24:52,769 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:24:52,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849993524] [2023-04-01 09:24:52,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849993524] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 09:24:52,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898895219] [2023-04-01 09:24:52,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:24:52,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:24:52,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:24:52,777 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 09:24:52,780 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 09:24:53,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:24:53,044 INFO L262 TraceCheckSpWp]: Trace formula consists of 1132 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 09:24:53,050 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:24:53,185 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 100 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:24:53,185 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 09:24:53,455 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 100 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:24:53,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898895219] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 09:24:53,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1852401851] [2023-04-01 09:24:53,502 INFO L159 IcfgInterpreter]: Started Sifa with 153 locations of interest [2023-04-01 09:24:53,502 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 09:24:53,516 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 09:24:53,520 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 09:24:53,521 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 09:24:54,872 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 194 for LOIs