/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/eca-rers2012/Problem16_label33.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 04:18:46,871 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 04:18:46,873 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 04:18:46,911 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 04:18:46,912 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 04:18:46,914 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 04:18:46,917 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 04:18:46,919 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 04:18:46,921 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 04:18:46,925 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 04:18:46,927 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 04:18:46,928 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 04:18:46,928 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 04:18:46,931 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 04:18:46,932 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 04:18:46,933 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 04:18:46,934 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 04:18:46,934 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 04:18:46,936 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 04:18:46,941 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 04:18:46,942 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 04:18:46,942 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 04:18:46,944 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 04:18:46,945 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 04:18:46,952 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 04:18:46,952 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 04:18:46,953 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 04:18:46,954 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 04:18:46,954 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 04:18:46,955 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 04:18:46,955 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 04:18:46,955 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 04:18:46,957 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 04:18:46,957 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 04:18:46,958 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 04:18:46,958 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 04:18:46,958 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 04:18:46,958 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 04:18:46,959 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 04:18:46,959 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 04:18:46,960 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 04:18:46,961 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 04:18:46,982 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 04:18:46,982 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 04:18:46,982 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 04:18:46,983 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 04:18:46,983 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 04:18:46,983 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 04:18:46,984 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 04:18:46,984 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 04:18:46,984 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 04:18:46,984 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 04:18:46,985 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 04:18:46,985 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 04:18:46,985 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 04:18:46,985 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 04:18:46,985 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 04:18:46,986 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 04:18:46,986 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 04:18:46,986 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 04:18:46,986 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 04:18:46,986 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 04:18:46,986 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 04:18:46,987 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 04:18:46,987 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 04:18:46,987 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 04:18:46,987 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 04:18:46,987 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 04:18:46,987 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 04:18:46,987 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 04:18:46,987 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 04:18:46,987 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 04:18:46,988 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 04:18:46,988 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 04:18:46,988 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:18:46,988 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 04:18:46,988 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 04:18:46,988 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 04:18:46,988 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 04:18:46,989 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 04:18:46,989 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 04:18:46,989 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 04:18:46,989 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 04:18:46,989 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 04:18:47,224 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 04:18:47,247 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 04:18:47,249 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 04:18:47,250 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 04:18:47,252 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 04:18:47,253 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem16_label33.c [2023-04-01 04:18:48,431 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 04:18:48,805 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 04:18:48,805 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem16_label33.c [2023-04-01 04:18:48,825 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eb6e5cc9b/25afbf1ef38d42c385250d2eb9ca453a/FLAG8c9347b1c [2023-04-01 04:18:48,841 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eb6e5cc9b/25afbf1ef38d42c385250d2eb9ca453a [2023-04-01 04:18:48,843 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 04:18:48,844 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 04:18:48,847 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 04:18:48,847 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 04:18:48,851 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 04:18:48,852 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:18:48" (1/1) ... [2023-04-01 04:18:48,853 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34f9bf6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:18:48, skipping insertion in model container [2023-04-01 04:18:48,853 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:18:48" (1/1) ... [2023-04-01 04:18:48,859 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 04:18:48,929 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 04:18:49,125 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/Problem16_label33.c[3017,3030] [2023-04-01 04:18:49,429 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:18:49,439 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 04:18:49,454 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/Problem16_label33.c[3017,3030] [2023-04-01 04:18:49,618 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:18:49,633 INFO L208 MainTranslator]: Completed translation [2023-04-01 04:18:49,634 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:18:49 WrapperNode [2023-04-01 04:18:49,634 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 04:18:49,635 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 04:18:49,635 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 04:18:49,635 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 04:18:49,647 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:18:49" (1/1) ... [2023-04-01 04:18:49,647 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:18:49" (1/1) ... [2023-04-01 04:18:49,689 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:18:49" (1/1) ... [2023-04-01 04:18:49,690 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:18:49" (1/1) ... [2023-04-01 04:18:49,750 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:18:49" (1/1) ... [2023-04-01 04:18:49,771 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:18:49" (1/1) ... [2023-04-01 04:18:49,785 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:18:49" (1/1) ... [2023-04-01 04:18:49,793 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:18:49" (1/1) ... [2023-04-01 04:18:49,804 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 04:18:49,805 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 04:18:49,805 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 04:18:49,806 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 04:18:49,807 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:18:49" (1/1) ... [2023-04-01 04:18:49,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:18:49,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:18:49,835 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 04:18:49,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 04:18:49,907 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 04:18:49,907 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 04:18:49,907 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 04:18:49,908 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 04:18:49,908 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 04:18:49,908 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 04:18:49,908 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 04:18:49,908 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 04:18:49,908 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 04:18:49,908 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 04:18:49,909 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 04:18:49,909 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 04:18:49,909 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 04:18:49,909 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 04:18:49,909 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 04:18:49,909 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 04:18:49,909 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 04:18:49,909 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 04:18:49,909 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 04:18:49,909 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 04:18:49,909 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 04:18:49,996 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 04:18:49,998 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 04:18:51,833 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 04:18:52,950 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 04:18:52,950 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 04:18:52,956 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:18:52 BoogieIcfgContainer [2023-04-01 04:18:52,956 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 04:18:52,960 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 04:18:52,960 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 04:18:52,963 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 04:18:52,963 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 04:18:48" (1/3) ... [2023-04-01 04:18:52,964 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e399994 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:18:52, skipping insertion in model container [2023-04-01 04:18:52,964 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:18:49" (2/3) ... [2023-04-01 04:18:52,964 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e399994 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:18:52, skipping insertion in model container [2023-04-01 04:18:52,964 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:18:52" (3/3) ... [2023-04-01 04:18:52,966 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem16_label33.c [2023-04-01 04:18:52,983 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 04:18:52,983 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 04:18:53,041 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 04:18:53,047 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;@a63aa07, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 04:18:53,047 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 04:18:53,053 INFO L276 IsEmpty]: Start isEmpty. Operand has 244 states, 234 states have (on average 1.9572649572649572) internal successors, (458), 235 states have internal predecessors, (458), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 04:18:53,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 04:18:53,059 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:18:53,059 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:18:53,060 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:18:53,066 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:18:53,066 INFO L85 PathProgramCache]: Analyzing trace with hash -706738074, now seen corresponding path program 1 times [2023-04-01 04:18:53,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:18:53,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579112328] [2023-04-01 04:18:53,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:18:53,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:18:53,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:18:53,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:18:53,471 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:18:53,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579112328] [2023-04-01 04:18:53,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579112328] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:18:53,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:18:53,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 04:18:53,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431717773] [2023-04-01 04:18:53,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:18:53,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:18:53,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:18:53,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:18:53,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:18:53,517 INFO L87 Difference]: Start difference. First operand has 244 states, 234 states have (on average 1.9572649572649572) internal successors, (458), 235 states have internal predecessors, (458), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:18:55,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:18:55,131 INFO L93 Difference]: Finished difference Result 718 states and 1389 transitions. [2023-04-01 04:18:55,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 04:18:55,133 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-04-01 04:18:55,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:18:55,146 INFO L225 Difference]: With dead ends: 718 [2023-04-01 04:18:55,147 INFO L226 Difference]: Without dead ends: 471 [2023-04-01 04:18:55,155 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:18:55,159 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 247 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 686 mSolverCounterSat, 317 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 1003 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 317 IncrementalHoareTripleChecker+Valid, 686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-04-01 04:18:55,160 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 90 Invalid, 1003 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [317 Valid, 686 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-04-01 04:18:55,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2023-04-01 04:18:55,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 468. [2023-04-01 04:18:55,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 458 states have (on average 1.8384279475982532) internal successors, (842), 458 states have internal predecessors, (842), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-04-01 04:18:55,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 853 transitions. [2023-04-01 04:18:55,236 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 853 transitions. Word has length 11 [2023-04-01 04:18:55,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:18:55,237 INFO L495 AbstractCegarLoop]: Abstraction has 468 states and 853 transitions. [2023-04-01 04:18:55,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:18:55,237 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 853 transitions. [2023-04-01 04:18:55,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-04-01 04:18:55,239 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:18:55,239 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:18:55,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 04:18:55,239 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:18:55,239 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:18:55,240 INFO L85 PathProgramCache]: Analyzing trace with hash -342906536, now seen corresponding path program 1 times [2023-04-01 04:18:55,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:18:55,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921693081] [2023-04-01 04:18:55,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:18:55,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:18:55,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:18:55,433 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:18:55,433 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:18:55,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921693081] [2023-04-01 04:18:55,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921693081] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:18:55,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:18:55,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:18:55,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462305969] [2023-04-01 04:18:55,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:18:55,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:18:55,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:18:55,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:18:55,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:18:55,441 INFO L87 Difference]: Start difference. First operand 468 states and 853 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:18:56,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:18:56,841 INFO L93 Difference]: Finished difference Result 1410 states and 2605 transitions. [2023-04-01 04:18:56,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 04:18:56,842 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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 22 [2023-04-01 04:18:56,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:18:56,848 INFO L225 Difference]: With dead ends: 1410 [2023-04-01 04:18:56,848 INFO L226 Difference]: Without dead ends: 947 [2023-04-01 04:18:56,850 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-04-01 04:18:56,851 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 889 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 1247 mSolverCounterSat, 397 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 889 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 1644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 397 IncrementalHoareTripleChecker+Valid, 1247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-04-01 04:18:56,851 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [889 Valid, 43 Invalid, 1644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [397 Valid, 1247 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-04-01 04:18:56,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 947 states. [2023-04-01 04:18:56,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 947 to 924. [2023-04-01 04:18:56,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 924 states, 906 states have (on average 1.7339955849889626) internal successors, (1571), 910 states have internal predecessors, (1571), 7 states have call successors, (7), 7 states have call predecessors, (7), 10 states have return successors, (26), 6 states have call predecessors, (26), 6 states have call successors, (26) [2023-04-01 04:18:56,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 924 states to 924 states and 1604 transitions. [2023-04-01 04:18:56,921 INFO L78 Accepts]: Start accepts. Automaton has 924 states and 1604 transitions. Word has length 22 [2023-04-01 04:18:56,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:18:56,922 INFO L495 AbstractCegarLoop]: Abstraction has 924 states and 1604 transitions. [2023-04-01 04:18:56,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:18:56,922 INFO L276 IsEmpty]: Start isEmpty. Operand 924 states and 1604 transitions. [2023-04-01 04:18:56,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-04-01 04:18:56,923 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:18:56,923 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:18:56,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 04:18:56,923 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:18:56,924 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:18:56,924 INFO L85 PathProgramCache]: Analyzing trace with hash -806188677, now seen corresponding path program 1 times [2023-04-01 04:18:56,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:18:56,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503552359] [2023-04-01 04:18:56,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:18:56,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:18:56,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:18:57,108 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:18:57,109 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:18:57,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503552359] [2023-04-01 04:18:57,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503552359] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:18:57,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:18:57,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:18:57,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147869013] [2023-04-01 04:18:57,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:18:57,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:18:57,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:18:57,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:18:57,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:18:57,111 INFO L87 Difference]: Start difference. First operand 924 states and 1604 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:18:58,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:18:58,623 INFO L93 Difference]: Finished difference Result 2556 states and 4514 transitions. [2023-04-01 04:18:58,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 04:18:58,625 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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 23 [2023-04-01 04:18:58,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:18:58,633 INFO L225 Difference]: With dead ends: 2556 [2023-04-01 04:18:58,633 INFO L226 Difference]: Without dead ends: 1637 [2023-04-01 04:18:58,635 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-04-01 04:18:58,636 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 994 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 1145 mSolverCounterSat, 439 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 994 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 1584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 439 IncrementalHoareTripleChecker+Valid, 1145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-04-01 04:18:58,636 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [994 Valid, 45 Invalid, 1584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [439 Valid, 1145 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-04-01 04:18:58,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1637 states. [2023-04-01 04:18:58,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1637 to 1605. [2023-04-01 04:18:58,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1605 states, 1573 states have (on average 1.477431659249841) internal successors, (2324), 1583 states have internal predecessors, (2324), 11 states have call successors, (11), 11 states have call predecessors, (11), 20 states have return successors, (69), 10 states have call predecessors, (69), 10 states have call successors, (69) [2023-04-01 04:18:58,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1605 states to 1605 states and 2404 transitions. [2023-04-01 04:18:58,686 INFO L78 Accepts]: Start accepts. Automaton has 1605 states and 2404 transitions. Word has length 23 [2023-04-01 04:18:58,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:18:58,686 INFO L495 AbstractCegarLoop]: Abstraction has 1605 states and 2404 transitions. [2023-04-01 04:18:58,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:18:58,686 INFO L276 IsEmpty]: Start isEmpty. Operand 1605 states and 2404 transitions. [2023-04-01 04:18:58,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-04-01 04:18:58,689 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:18:58,689 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:18:58,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 04:18:58,689 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:18:58,690 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:18:58,690 INFO L85 PathProgramCache]: Analyzing trace with hash 2063394039, now seen corresponding path program 1 times [2023-04-01 04:18:58,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:18:58,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266740834] [2023-04-01 04:18:58,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:18:58,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:18:58,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:18:58,861 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-01 04:18:58,861 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:18:58,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266740834] [2023-04-01 04:18:58,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266740834] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:18:58,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:18:58,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 04:18:58,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236277341] [2023-04-01 04:18:58,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:18:58,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:18:58,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:18:58,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:18:58,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:18:58,863 INFO L87 Difference]: Start difference. First operand 1605 states and 2404 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 04:18:59,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:18:59,962 INFO L93 Difference]: Finished difference Result 4561 states and 6803 transitions. [2023-04-01 04:18:59,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 04:18:59,963 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 92 [2023-04-01 04:18:59,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:18:59,975 INFO L225 Difference]: With dead ends: 4561 [2023-04-01 04:18:59,976 INFO L226 Difference]: Without dead ends: 2961 [2023-04-01 04:18:59,979 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:18:59,980 INFO L413 NwaCegarLoop]: 460 mSDtfsCounter, 225 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 756 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 476 SdHoareTripleChecker+Invalid, 940 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 756 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-04-01 04:18:59,981 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [225 Valid, 476 Invalid, 940 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 756 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-04-01 04:18:59,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2961 states. [2023-04-01 04:19:00,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2961 to 2913. [2023-04-01 04:19:00,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2913 states, 2866 states have (on average 1.3080949057920446) internal successors, (3749), 2879 states have internal predecessors, (3749), 17 states have call successors, (17), 17 states have call predecessors, (17), 29 states have return successors, (145), 16 states have call predecessors, (145), 16 states have call successors, (145) [2023-04-01 04:19:00,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2913 states to 2913 states and 3911 transitions. [2023-04-01 04:19:00,055 INFO L78 Accepts]: Start accepts. Automaton has 2913 states and 3911 transitions. Word has length 92 [2023-04-01 04:19:00,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:19:00,056 INFO L495 AbstractCegarLoop]: Abstraction has 2913 states and 3911 transitions. [2023-04-01 04:19:00,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 04:19:00,057 INFO L276 IsEmpty]: Start isEmpty. Operand 2913 states and 3911 transitions. [2023-04-01 04:19:00,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2023-04-01 04:19:00,059 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:19:00,059 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:19:00,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 04:19:00,059 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:19:00,060 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:19:00,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1583167363, now seen corresponding path program 1 times [2023-04-01 04:19:00,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:19:00,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381369645] [2023-04-01 04:19:00,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:19:00,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:19:00,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:19:00,293 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:19:00,293 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:19:00,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381369645] [2023-04-01 04:19:00,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381369645] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:19:00,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:19:00,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:19:00,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399234473] [2023-04-01 04:19:00,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:19:00,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:19:00,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:19:00,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:19:00,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:19:00,295 INFO L87 Difference]: Start difference. First operand 2913 states and 3911 transitions. Second operand has 5 states, 5 states have (on average 21.8) internal successors, (109), 4 states have internal predecessors, (109), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:19:01,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:19:01,821 INFO L93 Difference]: Finished difference Result 7225 states and 10000 transitions. [2023-04-01 04:19:01,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 04:19:01,823 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.8) internal successors, (109), 4 states have internal predecessors, (109), 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 115 [2023-04-01 04:19:01,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:19:01,844 INFO L225 Difference]: With dead ends: 7225 [2023-04-01 04:19:01,845 INFO L226 Difference]: Without dead ends: 4317 [2023-04-01 04:19:01,855 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-04-01 04:19:01,861 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 606 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1326 mSolverCounterSat, 403 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 606 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 1729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 403 IncrementalHoareTripleChecker+Valid, 1326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-04-01 04:19:01,862 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [606 Valid, 44 Invalid, 1729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [403 Valid, 1326 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-04-01 04:19:01,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4317 states. [2023-04-01 04:19:01,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4317 to 4138. [2023-04-01 04:19:01,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4138 states, 4059 states have (on average 1.3121458487312145) internal successors, (5326), 4092 states have internal predecessors, (5326), 23 states have call successors, (23), 23 states have call predecessors, (23), 55 states have return successors, (363), 22 states have call predecessors, (363), 22 states have call successors, (363) [2023-04-01 04:19:01,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4138 states to 4138 states and 5712 transitions. [2023-04-01 04:19:01,982 INFO L78 Accepts]: Start accepts. Automaton has 4138 states and 5712 transitions. Word has length 115 [2023-04-01 04:19:01,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:19:01,982 INFO L495 AbstractCegarLoop]: Abstraction has 4138 states and 5712 transitions. [2023-04-01 04:19:01,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.8) internal successors, (109), 4 states have internal predecessors, (109), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:19:01,983 INFO L276 IsEmpty]: Start isEmpty. Operand 4138 states and 5712 transitions. [2023-04-01 04:19:01,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2023-04-01 04:19:01,988 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:19:01,988 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:19:01,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 04:19:01,988 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:19:01,989 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:19:01,989 INFO L85 PathProgramCache]: Analyzing trace with hash -13217694, now seen corresponding path program 1 times [2023-04-01 04:19:01,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:19:01,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734588239] [2023-04-01 04:19:01,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:19:01,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:19:02,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:19:02,229 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 73 proven. 39 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-04-01 04:19:02,229 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:19:02,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734588239] [2023-04-01 04:19:02,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734588239] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:19:02,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317868953] [2023-04-01 04:19:02,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:19:02,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:19:02,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:19:02,237 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 04:19:02,261 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 04:19:02,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:19:02,383 INFO L262 TraceCheckSpWp]: Trace formula consists of 628 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 04:19:02,390 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:19:02,558 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 141 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 04:19:02,558 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:19:02,829 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 73 proven. 39 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-04-01 04:19:02,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317868953] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 04:19:02,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [855442922] [2023-04-01 04:19:02,858 INFO L159 IcfgInterpreter]: Started Sifa with 77 locations of interest [2023-04-01 04:19:02,859 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 04:19:02,862 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 04:19:02,867 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 04:19:02,867 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 04:19:03,070 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 46 for LOIs [2023-04-01 04:19:03,240 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 21 [2023-04-01 04:19:04,229 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 45826 conjuctions. This might take some time... [2023-04-01 04:19:08,546 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 1030 conjuctions. [2023-04-01 04:19:34,223 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 40