/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/Problem02_label20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 09:19:01,927 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 09:19:01,929 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 09:19:01,959 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 09:19:01,960 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 09:19:01,962 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 09:19:01,964 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 09:19:01,966 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 09:19:01,967 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 09:19:01,970 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 09:19:01,971 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 09:19:01,972 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 09:19:01,973 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 09:19:01,974 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 09:19:01,976 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 09:19:01,977 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 09:19:01,978 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 09:19:01,978 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 09:19:01,980 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 09:19:01,983 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 09:19:01,984 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 09:19:01,985 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 09:19:01,985 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 09:19:01,986 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 09:19:01,993 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 09:19:01,993 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 09:19:01,993 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 09:19:01,994 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 09:19:01,994 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 09:19:01,995 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 09:19:01,995 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 09:19:01,996 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 09:19:01,997 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 09:19:01,997 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 09:19:01,997 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 09:19:01,998 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 09:19:01,998 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 09:19:01,998 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 09:19:01,998 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 09:19:01,999 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 09:19:01,999 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 09:19:02,000 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 09:19:02,023 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 09:19:02,023 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 09:19:02,024 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 09:19:02,024 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 09:19:02,024 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 09:19:02,025 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 09:19:02,025 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 09:19:02,025 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 09:19:02,025 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 09:19:02,025 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 09:19:02,026 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 09:19:02,026 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 09:19:02,026 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 09:19:02,026 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 09:19:02,026 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 09:19:02,026 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 09:19:02,026 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 09:19:02,027 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 09:19:02,027 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 09:19:02,027 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 09:19:02,027 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 09:19:02,027 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 09:19:02,028 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 09:19:02,028 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 09:19:02,028 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 09:19:02,028 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 09:19:02,028 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 09:19:02,028 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 09:19:02,029 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 09:19:02,029 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 09:19:02,029 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 09:19:02,029 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 09:19:02,029 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 09:19:02,029 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 09:19:02,029 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 09:19:02,030 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 09:19:02,030 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 09:19:02,030 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 09:19:02,030 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 09:19:02,030 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 09:19:02,030 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 09:19:02,030 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 09:19:02,222 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 09:19:02,245 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 09:19:02,246 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 09:19:02,247 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 09:19:02,248 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 09:19:02,248 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem02_label20.c [2023-04-01 09:19:03,165 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 09:19:03,378 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 09:19:03,379 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem02_label20.c [2023-04-01 09:19:03,389 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/24dbf7c7b/d6e6422d88de4c70b2ebd65e4a8216d9/FLAG2af9b30e4 [2023-04-01 09:19:03,398 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/24dbf7c7b/d6e6422d88de4c70b2ebd65e4a8216d9 [2023-04-01 09:19:03,400 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 09:19:03,401 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 09:19:03,403 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 09:19:03,403 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 09:19:03,405 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 09:19:03,405 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 09:19:03" (1/1) ... [2023-04-01 09:19:03,406 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d13e961 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:19:03, skipping insertion in model container [2023-04-01 09:19:03,407 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 09:19:03" (1/1) ... [2023-04-01 09:19:03,411 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 09:19:03,439 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 09:19:03,681 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/Problem02_label20.c[16674,16687] [2023-04-01 09:19:03,708 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 09:19:03,718 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 09:19:03,772 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/Problem02_label20.c[16674,16687] [2023-04-01 09:19:03,785 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 09:19:03,796 INFO L208 MainTranslator]: Completed translation [2023-04-01 09:19:03,797 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:19:03 WrapperNode [2023-04-01 09:19:03,797 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 09:19:03,798 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 09:19:03,798 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 09:19:03,798 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 09:19:03,806 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:19:03" (1/1) ... [2023-04-01 09:19:03,806 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:19:03" (1/1) ... [2023-04-01 09:19:03,824 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:19:03" (1/1) ... [2023-04-01 09:19:03,824 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:19:03" (1/1) ... [2023-04-01 09:19:03,861 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:19:03" (1/1) ... [2023-04-01 09:19:03,879 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:19:03" (1/1) ... [2023-04-01 09:19:03,882 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:19:03" (1/1) ... [2023-04-01 09:19:03,884 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:19:03" (1/1) ... [2023-04-01 09:19:03,888 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 09:19:03,901 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 09:19:03,901 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 09:19:03,901 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 09:19:03,902 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:19:03" (1/1) ... [2023-04-01 09:19:03,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 09:19:03,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:19:03,924 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 09:19:03,930 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 09:19:03,951 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 09:19:03,951 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 09:19:03,951 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 09:19:03,952 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 09:19:03,952 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 09:19:03,952 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 09:19:03,952 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 09:19:03,953 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 09:19:03,953 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 09:19:03,953 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 09:19:03,953 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 09:19:03,953 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 09:19:03,953 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 09:19:03,953 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 09:19:03,953 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 09:19:03,953 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 09:19:03,953 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 09:19:03,953 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 09:19:03,953 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 09:19:04,004 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 09:19:04,005 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 09:19:04,628 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 09:19:04,799 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 09:19:04,799 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 09:19:04,801 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 09:19:04 BoogieIcfgContainer [2023-04-01 09:19:04,801 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 09:19:04,803 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 09:19:04,803 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 09:19:04,805 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 09:19:04,805 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 09:19:03" (1/3) ... [2023-04-01 09:19:04,805 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@134d94e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 09:19:04, skipping insertion in model container [2023-04-01 09:19:04,805 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:19:03" (2/3) ... [2023-04-01 09:19:04,806 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@134d94e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 09:19:04, skipping insertion in model container [2023-04-01 09:19:04,806 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 09:19:04" (3/3) ... [2023-04-01 09:19:04,806 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem02_label20.c [2023-04-01 09:19:04,817 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 09:19:04,817 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 09:19:04,851 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 09:19:04,856 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;@5779351e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 09:19:04,856 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 09:19:04,859 INFO L276 IsEmpty]: Start isEmpty. Operand has 95 states, 87 states have (on average 1.9080459770114941) internal successors, (166), 88 states have internal predecessors, (166), 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 09:19:04,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-04-01 09:19:04,866 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:19:04,867 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] [2023-04-01 09:19:04,867 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:19:04,870 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:19:04,870 INFO L85 PathProgramCache]: Analyzing trace with hash -2027412264, now seen corresponding path program 1 times [2023-04-01 09:19:04,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:19:04,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659582494] [2023-04-01 09:19:04,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:19:04,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:19:05,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:19:05,355 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 09:19:05,355 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:19:05,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659582494] [2023-04-01 09:19:05,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659582494] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:19:05,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 09:19:05,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 09:19:05,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806844154] [2023-04-01 09:19:05,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:19:05,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 09:19:05,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:19:05,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 09:19:05,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 09:19:05,425 INFO L87 Difference]: Start difference. First operand has 95 states, 87 states have (on average 1.9080459770114941) internal successors, (166), 88 states have internal predecessors, (166), 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 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 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 09:19:05,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:19:05,748 INFO L93 Difference]: Finished difference Result 273 states and 508 transitions. [2023-04-01 09:19:05,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 09:19:05,750 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 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 86 [2023-04-01 09:19:05,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:19:05,756 INFO L225 Difference]: With dead ends: 273 [2023-04-01 09:19:05,756 INFO L226 Difference]: Without dead ends: 175 [2023-04-01 09:19:05,758 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 09:19:05,760 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 25 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 09:19:05,761 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 39 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 09:19:05,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2023-04-01 09:19:05,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2023-04-01 09:19:05,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 167 states have (on average 1.844311377245509) internal successors, (308), 167 states have internal predecessors, (308), 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 09:19:05,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 317 transitions. [2023-04-01 09:19:05,792 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 317 transitions. Word has length 86 [2023-04-01 09:19:05,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:19:05,792 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 317 transitions. [2023-04-01 09:19:05,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 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 09:19:05,792 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 317 transitions. [2023-04-01 09:19:05,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2023-04-01 09:19:05,795 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:19:05,795 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-01 09:19:05,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 09:19:05,795 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:19:05,796 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:19:05,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1213460140, now seen corresponding path program 1 times [2023-04-01 09:19:05,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:19:05,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186402661] [2023-04-01 09:19:05,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:19:05,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:19:05,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:19:06,065 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:19:06,065 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:19:06,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186402661] [2023-04-01 09:19:06,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186402661] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:19:06,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 09:19:06,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 09:19:06,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512380129] [2023-04-01 09:19:06,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:19:06,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 09:19:06,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:19:06,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 09:19:06,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 09:19:06,069 INFO L87 Difference]: Start difference. First operand 175 states and 317 transitions. Second operand has 5 states, 5 states have (on average 19.6) internal successors, (98), 4 states have internal predecessors, (98), 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 09:19:06,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:19:06,442 INFO L93 Difference]: Finished difference Result 535 states and 986 transitions. [2023-04-01 09:19:06,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 09:19:06,443 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.6) internal successors, (98), 4 states have internal predecessors, (98), 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 104 [2023-04-01 09:19:06,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:19:06,449 INFO L225 Difference]: With dead ends: 535 [2023-04-01 09:19:06,449 INFO L226 Difference]: Without dead ends: 365 [2023-04-01 09:19:06,454 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 09:19:06,457 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 272 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 09:19:06,457 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [272 Valid, 49 Invalid, 586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 507 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 09:19:06,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2023-04-01 09:19:06,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 355. [2023-04-01 09:19:06,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 337 states have (on average 1.7329376854599408) internal successors, (584), 343 states have internal predecessors, (584), 6 states have call successors, (6), 6 states have call predecessors, (6), 11 states have return successors, (27), 5 states have call predecessors, (27), 5 states have call successors, (27) [2023-04-01 09:19:06,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 617 transitions. [2023-04-01 09:19:06,483 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 617 transitions. Word has length 104 [2023-04-01 09:19:06,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:19:06,484 INFO L495 AbstractCegarLoop]: Abstraction has 355 states and 617 transitions. [2023-04-01 09:19:06,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.6) internal successors, (98), 4 states have internal predecessors, (98), 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 09:19:06,484 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 617 transitions. [2023-04-01 09:19:06,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2023-04-01 09:19:06,487 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:19:06,487 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-01 09:19:06,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 09:19:06,488 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:19:06,488 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:19:06,488 INFO L85 PathProgramCache]: Analyzing trace with hash 1673322951, now seen corresponding path program 1 times [2023-04-01 09:19:06,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:19:06,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481146454] [2023-04-01 09:19:06,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:19:06,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:19:06,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:19:06,618 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:19:06,618 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:19:06,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481146454] [2023-04-01 09:19:06,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481146454] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:19:06,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 09:19:06,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 09:19:06,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352367996] [2023-04-01 09:19:06,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:19:06,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 09:19:06,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:19:06,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 09:19:06,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 09:19:06,620 INFO L87 Difference]: Start difference. First operand 355 states and 617 transitions. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 4 states have internal predecessors, (99), 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 09:19:06,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:19:06,986 INFO L93 Difference]: Finished difference Result 1007 states and 1864 transitions. [2023-04-01 09:19:06,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 09:19:06,987 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 4 states have internal predecessors, (99), 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 105 [2023-04-01 09:19:06,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:19:06,990 INFO L225 Difference]: With dead ends: 1007 [2023-04-01 09:19:06,991 INFO L226 Difference]: Without dead ends: 657 [2023-04-01 09:19:06,992 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 09:19:06,992 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 346 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 346 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 09:19:06,993 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [346 Valid, 42 Invalid, 542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 09:19:06,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2023-04-01 09:19:07,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 637. [2023-04-01 09:19:07,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 637 states, 598 states have (on average 1.5819397993311037) internal successors, (946), 619 states have internal predecessors, (946), 9 states have call successors, (9), 9 states have call predecessors, (9), 29 states have return successors, (100), 8 states have call predecessors, (100), 8 states have call successors, (100) [2023-04-01 09:19:07,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 1055 transitions. [2023-04-01 09:19:07,053 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 1055 transitions. Word has length 105 [2023-04-01 09:19:07,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:19:07,054 INFO L495 AbstractCegarLoop]: Abstraction has 637 states and 1055 transitions. [2023-04-01 09:19:07,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 4 states have internal predecessors, (99), 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 09:19:07,054 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 1055 transitions. [2023-04-01 09:19:07,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2023-04-01 09:19:07,059 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:19:07,059 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:19:07,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 09:19:07,060 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:19:07,060 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:19:07,060 INFO L85 PathProgramCache]: Analyzing trace with hash 695084301, now seen corresponding path program 1 times [2023-04-01 09:19:07,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:19:07,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171415669] [2023-04-01 09:19:07,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:19:07,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:19:07,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:19:07,222 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:19:07,222 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:19:07,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171415669] [2023-04-01 09:19:07,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171415669] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:19:07,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 09:19:07,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 09:19:07,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178235204] [2023-04-01 09:19:07,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:19:07,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 09:19:07,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:19:07,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 09:19:07,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 09:19:07,225 INFO L87 Difference]: Start difference. First operand 637 states and 1055 transitions. Second operand has 5 states, 5 states have (on average 23.0) internal successors, (115), 4 states have internal predecessors, (115), 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 09:19:07,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:19:07,576 INFO L93 Difference]: Finished difference Result 1567 states and 2674 transitions. [2023-04-01 09:19:07,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 09:19:07,577 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 23.0) internal successors, (115), 4 states have internal predecessors, (115), 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 121 [2023-04-01 09:19:07,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:19:07,586 INFO L225 Difference]: With dead ends: 1567 [2023-04-01 09:19:07,586 INFO L226 Difference]: Without dead ends: 935 [2023-04-01 09:19:07,588 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 09:19:07,596 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 243 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 09:19:07,597 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [243 Valid, 44 Invalid, 611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 507 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 09:19:07,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 935 states. [2023-04-01 09:19:07,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 935 to 913. [2023-04-01 09:19:07,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 913 states, 856 states have (on average 1.4824766355140186) internal successors, (1269), 889 states have internal predecessors, (1269), 12 states have call successors, (12), 12 states have call predecessors, (12), 44 states have return successors, (171), 11 states have call predecessors, (171), 11 states have call successors, (171) [2023-04-01 09:19:07,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 913 states to 913 states and 1452 transitions. [2023-04-01 09:19:07,651 INFO L78 Accepts]: Start accepts. Automaton has 913 states and 1452 transitions. Word has length 121 [2023-04-01 09:19:07,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:19:07,652 INFO L495 AbstractCegarLoop]: Abstraction has 913 states and 1452 transitions. [2023-04-01 09:19:07,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.0) internal successors, (115), 4 states have internal predecessors, (115), 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 09:19:07,653 INFO L276 IsEmpty]: Start isEmpty. Operand 913 states and 1452 transitions. [2023-04-01 09:19:07,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-04-01 09:19:07,663 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:19:07,663 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] [2023-04-01 09:19:07,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 09:19:07,664 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:19:07,664 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:19:07,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1199027665, now seen corresponding path program 1 times [2023-04-01 09:19:07,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:19:07,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697232133] [2023-04-01 09:19:07,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:19:07,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:19:07,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:19:07,848 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 09:19:07,849 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:19:07,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697232133] [2023-04-01 09:19:07,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697232133] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:19:07,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 09:19:07,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 09:19:07,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798686258] [2023-04-01 09:19:07,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:19:07,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 09:19:07,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:19:07,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 09:19:07,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 09:19:07,851 INFO L87 Difference]: Start difference. First operand 913 states and 1452 transitions. Second operand has 5 states, 5 states have (on average 23.4) internal successors, (117), 4 states have internal predecessors, (117), 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 09:19:08,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:19:08,033 INFO L93 Difference]: Finished difference Result 1671 states and 2839 transitions. [2023-04-01 09:19:08,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 09:19:08,033 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 23.4) internal successors, (117), 4 states have internal predecessors, (117), 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 123 [2023-04-01 09:19:08,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:19:08,037 INFO L225 Difference]: With dead ends: 1671 [2023-04-01 09:19:08,038 INFO L226 Difference]: Without dead ends: 763 [2023-04-01 09:19:08,040 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 09:19:08,041 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 246 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 09:19:08,043 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [246 Valid, 24 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 09:19:08,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 763 states. [2023-04-01 09:19:08,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 763 to 729. [2023-04-01 09:19:08,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 729 states, 684 states have (on average 1.3698830409356726) internal successors, (937), 709 states have internal predecessors, (937), 10 states have call successors, (10), 10 states have call predecessors, (10), 34 states have return successors, (101), 9 states have call predecessors, (101), 9 states have call successors, (101) [2023-04-01 09:19:08,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 729 states to 729 states and 1048 transitions. [2023-04-01 09:19:08,078 INFO L78 Accepts]: Start accepts. Automaton has 729 states and 1048 transitions. Word has length 123 [2023-04-01 09:19:08,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:19:08,078 INFO L495 AbstractCegarLoop]: Abstraction has 729 states and 1048 transitions. [2023-04-01 09:19:08,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.4) internal successors, (117), 4 states have internal predecessors, (117), 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 09:19:08,078 INFO L276 IsEmpty]: Start isEmpty. Operand 729 states and 1048 transitions. [2023-04-01 09:19:08,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2023-04-01 09:19:08,082 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:19:08,083 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:19:08,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 09:19:08,083 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:19:08,083 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:19:08,083 INFO L85 PathProgramCache]: Analyzing trace with hash -1195485845, now seen corresponding path program 1 times [2023-04-01 09:19:08,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:19:08,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332999309] [2023-04-01 09:19:08,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:19:08,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:19:08,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:19:08,224 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 53 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:19:08,224 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:19:08,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332999309] [2023-04-01 09:19:08,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332999309] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 09:19:08,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764380895] [2023-04-01 09:19:08,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:19:08,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:19:08,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:19:08,227 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 09:19:08,268 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 09:19:08,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:19:08,332 INFO L262 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-01 09:19:08,338 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:19:08,450 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 53 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:19:08,451 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 09:19:08,571 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 53 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:19:08,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764380895] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 09:19:08,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [694907413] [2023-04-01 09:19:08,608 INFO L159 IcfgInterpreter]: Started Sifa with 90 locations of interest [2023-04-01 09:19:08,608 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 09:19:08,611 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 09:19:08,614 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 09:19:08,615 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 09:19:08,906 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 98 for LOIs