/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/float-benchs/zonotope_3.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 21:20:45,796 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 21:20:45,797 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 21:20:45,815 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 21:20:45,816 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 21:20:45,816 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 21:20:45,817 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 21:20:45,818 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 21:20:45,819 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 21:20:45,820 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 21:20:45,820 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 21:20:45,821 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 21:20:45,821 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 21:20:45,822 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 21:20:45,823 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 21:20:45,823 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 21:20:45,824 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 21:20:45,824 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 21:20:45,825 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 21:20:45,827 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 21:20:45,827 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 21:20:45,828 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 21:20:45,829 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 21:20:45,829 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 21:20:45,832 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-02 21:20:45,832 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-02 21:20:45,832 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-02 21:20:45,833 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-02 21:20:45,833 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-02 21:20:45,833 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-02 21:20:45,834 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 21:20:45,834 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 21:20:45,835 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 21:20:45,835 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 21:20:45,836 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 21:20:45,836 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 21:20:45,836 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 21:20:45,837 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 21:20:45,837 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 21:20:45,837 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 21:20:45,838 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 21:20:45,838 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 [2023-04-02 21:20:45,853 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 21:20:45,853 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 21:20:45,853 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 21:20:45,854 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 21:20:45,854 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 21:20:45,854 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 21:20:45,854 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 21:20:45,854 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 21:20:45,854 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 21:20:45,855 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 21:20:45,855 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 21:20:45,855 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 21:20:45,855 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 21:20:45,855 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 21:20:45,855 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 21:20:45,855 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 21:20:45,855 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 21:20:45,855 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 21:20:45,856 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 21:20:45,856 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 21:20:45,856 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 21:20:45,856 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 21:20:45,856 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 21:20:45,856 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 21:20:45,858 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 21:20:45,858 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 21:20:45,858 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 21:20:45,858 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 21:20:45,858 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 21:20:45,858 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 21:20:45,858 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 21:20:45,858 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 21:20:45,859 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 21:20:45,859 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 21:20:45,859 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 21:20:45,859 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 21:20:45,859 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 21:20:45,859 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 21:20:45,859 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 21:20:45,859 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 21:20:45,859 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 21:20:45,860 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 21:20:45,997 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 21:20:46,018 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 21:20:46,020 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 21:20:46,020 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 21:20:46,021 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 21:20:46,022 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-benchs/zonotope_3.c [2023-04-02 21:20:47,104 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 21:20:47,269 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 21:20:47,270 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-benchs/zonotope_3.c [2023-04-02 21:20:47,274 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/71d7fd43e/41afebc8c1644e2893da3e57da2ab36b/FLAGeebbc4962 [2023-04-02 21:20:47,287 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/71d7fd43e/41afebc8c1644e2893da3e57da2ab36b [2023-04-02 21:20:47,289 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 21:20:47,290 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 21:20:47,293 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 21:20:47,293 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 21:20:47,296 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 21:20:47,296 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 09:20:47" (1/1) ... [2023-04-02 21:20:47,297 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46511671 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:20:47, skipping insertion in model container [2023-04-02 21:20:47,297 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 09:20:47" (1/1) ... [2023-04-02 21:20:47,302 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 21:20:47,312 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 21:20:47,427 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/float-benchs/zonotope_3.c[604,617] [2023-04-02 21:20:47,439 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 21:20:47,445 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 21:20:47,453 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/float-benchs/zonotope_3.c[604,617] [2023-04-02 21:20:47,459 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 21:20:47,470 INFO L208 MainTranslator]: Completed translation [2023-04-02 21:20:47,471 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:20:47 WrapperNode [2023-04-02 21:20:47,471 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 21:20:47,472 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 21:20:47,472 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 21:20:47,472 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 21:20:47,478 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:20:47" (1/1) ... [2023-04-02 21:20:47,478 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:20:47" (1/1) ... [2023-04-02 21:20:47,484 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:20:47" (1/1) ... [2023-04-02 21:20:47,484 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:20:47" (1/1) ... [2023-04-02 21:20:47,491 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:20:47" (1/1) ... [2023-04-02 21:20:47,493 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:20:47" (1/1) ... [2023-04-02 21:20:47,493 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:20:47" (1/1) ... [2023-04-02 21:20:47,494 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:20:47" (1/1) ... [2023-04-02 21:20:47,495 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 21:20:47,496 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 21:20:47,496 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 21:20:47,496 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 21:20:47,496 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:20:47" (1/1) ... [2023-04-02 21:20:47,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 21:20:47,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 21:20:47,524 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) [2023-04-02 21:20:47,540 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 [2023-04-02 21:20:47,577 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 21:20:47,578 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 21:20:47,578 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 21:20:47,579 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-02 21:20:47,579 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-02 21:20:47,579 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2023-04-02 21:20:47,579 INFO L138 BoogieDeclarations]: Found implementation of procedure g [2023-04-02 21:20:47,581 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 21:20:47,581 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 21:20:47,582 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 21:20:47,582 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 21:20:47,582 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 21:20:47,582 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float [2023-04-02 21:20:47,582 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-02 21:20:47,582 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-02 21:20:47,582 INFO L130 BoogieDeclarations]: Found specification of procedure f [2023-04-02 21:20:47,582 INFO L130 BoogieDeclarations]: Found specification of procedure g [2023-04-02 21:20:47,582 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 21:20:47,582 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 21:20:47,582 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 21:20:47,582 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 21:20:47,582 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 21:20:47,592 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 21:20:47,592 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 21:20:47,691 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 21:20:47,692 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 21:20:47,873 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 21:20:47,904 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 21:20:47,905 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-02 21:20:47,906 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 09:20:47 BoogieIcfgContainer [2023-04-02 21:20:47,906 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 21:20:47,908 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 21:20:47,908 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 21:20:47,910 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 21:20:47,910 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 09:20:47" (1/3) ... [2023-04-02 21:20:47,911 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9b80484 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 09:20:47, skipping insertion in model container [2023-04-02 21:20:47,911 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:20:47" (2/3) ... [2023-04-02 21:20:47,911 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9b80484 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 09:20:47, skipping insertion in model container [2023-04-02 21:20:47,911 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 09:20:47" (3/3) ... [2023-04-02 21:20:47,912 INFO L112 eAbstractionObserver]: Analyzing ICFG zonotope_3.c [2023-04-02 21:20:47,928 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 21:20:47,928 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 21:20:47,957 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 21:20:47,962 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;@3859619c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 21:20:47,962 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 21:20:47,964 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 20 states have (on average 1.15) internal successors, (23), 21 states have internal predecessors, (23), 12 states have call successors, (12), 6 states have call predecessors, (12), 6 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-04-02 21:20:47,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-04-02 21:20:47,969 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 21:20:47,970 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 21:20:47,970 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 21:20:47,973 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 21:20:47,973 INFO L85 PathProgramCache]: Analyzing trace with hash 1071781716, now seen corresponding path program 1 times [2023-04-02 21:20:47,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 21:20:47,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341645975] [2023-04-02 21:20:47,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:20:47,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 21:20:48,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:20:48,121 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 21:20:48,121 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 21:20:48,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341645975] [2023-04-02 21:20:48,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341645975] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 21:20:48,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 21:20:48,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 21:20:48,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316881873] [2023-04-02 21:20:48,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 21:20:48,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 21:20:48,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 21:20:48,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 21:20:48,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 21:20:48,145 INFO L87 Difference]: Start difference. First operand has 40 states, 20 states have (on average 1.15) internal successors, (23), 21 states have internal predecessors, (23), 12 states have call successors, (12), 6 states have call predecessors, (12), 6 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-04-02 21:20:48,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 21:20:48,175 INFO L93 Difference]: Finished difference Result 61 states and 75 transitions. [2023-04-02 21:20:48,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 21:20:48,176 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 26 [2023-04-02 21:20:48,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 21:20:48,181 INFO L225 Difference]: With dead ends: 61 [2023-04-02 21:20:48,181 INFO L226 Difference]: Without dead ends: 44 [2023-04-02 21:20:48,182 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 21:20:48,185 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 4 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 21:20:48,185 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 74 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 21:20:48,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-04-02 21:20:48,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 35. [2023-04-02 21:20:48,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 18 states have internal predecessors, (19), 12 states have call successors, (12), 6 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-04-02 21:20:48,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2023-04-02 21:20:48,230 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 26 [2023-04-02 21:20:48,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 21:20:48,230 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2023-04-02 21:20:48,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-04-02 21:20:48,231 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2023-04-02 21:20:48,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-04-02 21:20:48,232 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 21:20:48,232 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 21:20:48,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 21:20:48,232 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 21:20:48,233 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 21:20:48,233 INFO L85 PathProgramCache]: Analyzing trace with hash 289249611, now seen corresponding path program 1 times [2023-04-02 21:20:48,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 21:20:48,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810600862] [2023-04-02 21:20:48,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:20:48,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 21:20:48,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:20:48,349 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-04-02 21:20:48,349 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 21:20:48,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810600862] [2023-04-02 21:20:48,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810600862] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 21:20:48,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671881931] [2023-04-02 21:20:48,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:20:48,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 21:20:48,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 21:20:48,363 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) [2023-04-02 21:20:48,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-02 21:20:48,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:20:48,439 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-02 21:20:48,443 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 21:20:48,485 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-04-02 21:20:48,486 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 21:20:48,538 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-04-02 21:20:48,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671881931] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 21:20:48,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [250893208] [2023-04-02 21:20:48,551 INFO L159 IcfgInterpreter]: Started Sifa with 34 locations of interest [2023-04-02 21:20:48,551 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 21:20:48,554 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 21:20:48,557 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 21:20:48,557 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 21:20:48,606 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-02 21:20:49,016 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 13 for LOIs [2023-04-02 21:20:49,023 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 27 for LOIs [2023-04-02 21:20:49,029 INFO L197 IcfgInterpreter]: Interpreting procedure g with input of size 9 for LOIs [2023-04-02 21:20:49,030 INFO L197 IcfgInterpreter]: Interpreting procedure f with input of size 9 for LOIs [2023-04-02 21:20:49,031 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 21:20:49,034 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 21:20:49,400 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '469#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 21:20:49,401 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 21:20:49,401 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 21:20:49,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-04-02 21:20:49,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970658911] [2023-04-02 21:20:49,402 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 21:20:49,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 21:20:49,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 21:20:49,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 21:20:49,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2023-04-02 21:20:49,404 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 5 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20) [2023-04-02 21:20:49,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 21:20:49,463 INFO L93 Difference]: Finished difference Result 70 states and 93 transitions. [2023-04-02 21:20:49,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 21:20:49,463 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 5 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20) Word has length 46 [2023-04-02 21:20:49,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 21:20:49,464 INFO L225 Difference]: With dead ends: 70 [2023-04-02 21:20:49,464 INFO L226 Difference]: Without dead ends: 65 [2023-04-02 21:20:49,465 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 115 SyntacticMatches, 8 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2023-04-02 21:20:49,466 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 8 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 21:20:49,466 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 91 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 21:20:49,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-04-02 21:20:49,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2023-04-02 21:20:49,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 33 states have (on average 1.0303030303030303) internal successors, (34), 33 states have internal predecessors, (34), 27 states have call successors, (27), 6 states have call predecessors, (27), 4 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2023-04-02 21:20:49,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 86 transitions. [2023-04-02 21:20:49,474 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 86 transitions. Word has length 46 [2023-04-02 21:20:49,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 21:20:49,474 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 86 transitions. [2023-04-02 21:20:49,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 5 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20) [2023-04-02 21:20:49,474 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 86 transitions. [2023-04-02 21:20:49,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2023-04-02 21:20:49,476 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 21:20:49,476 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 21:20:49,484 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-02 21:20:49,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 21:20:49,682 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 21:20:49,682 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 21:20:49,682 INFO L85 PathProgramCache]: Analyzing trace with hash -315795920, now seen corresponding path program 2 times [2023-04-02 21:20:49,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 21:20:49,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775644779] [2023-04-02 21:20:49,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:20:49,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 21:20:49,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:20:49,881 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2023-04-02 21:20:49,881 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 21:20:49,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775644779] [2023-04-02 21:20:49,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775644779] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 21:20:49,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482183894] [2023-04-02 21:20:49,882 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 21:20:49,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 21:20:49,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 21:20:49,898 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 21:20:49,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-02 21:20:50,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2023-04-02 21:20:50,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 21:20:50,026 INFO L262 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-02 21:20:50,030 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 21:20:50,095 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2023-04-02 21:20:50,095 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 21:20:50,214 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2023-04-02 21:20:50,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482183894] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 21:20:50,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [88616507] [2023-04-02 21:20:50,217 INFO L159 IcfgInterpreter]: Started Sifa with 34 locations of interest [2023-04-02 21:20:50,217 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 21:20:50,217 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 21:20:50,217 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 21:20:50,217 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 21:20:50,232 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-02 21:20:50,478 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 13 for LOIs [2023-04-02 21:20:50,481 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 27 for LOIs [2023-04-02 21:20:50,485 INFO L197 IcfgInterpreter]: Interpreting procedure g with input of size 9 for LOIs [2023-04-02 21:20:50,485 INFO L197 IcfgInterpreter]: Interpreting procedure f with input of size 9 for LOIs [2023-04-02 21:20:50,486 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 21:20:50,488 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 21:20:51,116 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1341#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 21:20:51,116 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 21:20:51,116 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 21:20:51,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-04-02 21:20:51,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307083953] [2023-04-02 21:20:51,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 21:20:51,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-02 21:20:51,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 21:20:51,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-02 21:20:51,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2023-04-02 21:20:51,118 INFO L87 Difference]: Start difference. First operand 65 states and 86 transitions. Second operand has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 13 states have internal predecessors, (61), 11 states have call successors, (52), 2 states have call predecessors, (52), 1 states have return successors, (50), 10 states have call predecessors, (50), 10 states have call successors, (50) [2023-04-02 21:20:51,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 21:20:51,204 INFO L93 Difference]: Finished difference Result 130 states and 186 transitions. [2023-04-02 21:20:51,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-02 21:20:51,205 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 13 states have internal predecessors, (61), 11 states have call successors, (52), 2 states have call predecessors, (52), 1 states have return successors, (50), 10 states have call predecessors, (50), 10 states have call successors, (50) Word has length 106 [2023-04-02 21:20:51,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 21:20:51,207 INFO L225 Difference]: With dead ends: 130 [2023-04-02 21:20:51,207 INFO L226 Difference]: Without dead ends: 125 [2023-04-02 21:20:51,207 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 268 SyntacticMatches, 32 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 721 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2023-04-02 21:20:51,208 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 8 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 21:20:51,208 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 129 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 21:20:51,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2023-04-02 21:20:51,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2023-04-02 21:20:51,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 63 states have (on average 1.0158730158730158) internal successors, (64), 63 states have internal predecessors, (64), 57 states have call successors, (57), 6 states have call predecessors, (57), 4 states have return successors, (55), 55 states have call predecessors, (55), 55 states have call successors, (55) [2023-04-02 21:20:51,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 176 transitions. [2023-04-02 21:20:51,220 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 176 transitions. Word has length 106 [2023-04-02 21:20:51,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 21:20:51,220 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 176 transitions. [2023-04-02 21:20:51,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 13 states have internal predecessors, (61), 11 states have call successors, (52), 2 states have call predecessors, (52), 1 states have return successors, (50), 10 states have call predecessors, (50), 10 states have call successors, (50) [2023-04-02 21:20:51,221 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 176 transitions. [2023-04-02 21:20:51,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2023-04-02 21:20:51,224 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 21:20:51,241 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 21:20:51,248 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-02 21:20:51,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-04-02 21:20:51,442 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 21:20:51,442 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 21:20:51,442 INFO L85 PathProgramCache]: Analyzing trace with hash -1909864582, now seen corresponding path program 3 times [2023-04-02 21:20:51,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 21:20:51,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457310553] [2023-04-02 21:20:51,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:20:51,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 21:20:51,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:20:51,907 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 0 proven. 460 refuted. 0 times theorem prover too weak. 1014 trivial. 0 not checked. [2023-04-02 21:20:51,907 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 21:20:51,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457310553] [2023-04-02 21:20:51,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457310553] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 21:20:51,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697399350] [2023-04-02 21:20:51,914 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 21:20:51,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 21:20:51,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 21:20:51,939 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 21:20:51,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-02 21:20:52,072 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 21:20:52,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 21:20:52,074 INFO L262 TraceCheckSpWp]: Trace formula consists of 581 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-02 21:20:52,079 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 21:20:52,176 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 0 proven. 460 refuted. 0 times theorem prover too weak. 1014 trivial. 0 not checked. [2023-04-02 21:20:52,176 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 21:20:52,533 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 0 proven. 460 refuted. 0 times theorem prover too weak. 1014 trivial. 0 not checked. [2023-04-02 21:20:52,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697399350] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 21:20:52,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1597491308] [2023-04-02 21:20:52,535 INFO L159 IcfgInterpreter]: Started Sifa with 34 locations of interest [2023-04-02 21:20:52,535 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 21:20:52,536 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 21:20:52,536 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 21:20:52,536 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 21:20:52,546 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-02 21:20:52,697 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 13 for LOIs [2023-04-02 21:20:52,701 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 27 for LOIs [2023-04-02 21:20:52,705 INFO L197 IcfgInterpreter]: Interpreting procedure g with input of size 9 for LOIs [2023-04-02 21:20:52,706 INFO L197 IcfgInterpreter]: Interpreting procedure f with input of size 9 for LOIs [2023-04-02 21:20:52,707 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 21:20:52,709 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 21:20:53,842 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3137#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 21:20:53,842 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 21:20:53,842 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 21:20:53,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2023-04-02 21:20:53,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834297816] [2023-04-02 21:20:53,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 21:20:53,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-04-02 21:20:53,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 21:20:53,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-04-02 21:20:53,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=344, Invalid=1062, Unknown=0, NotChecked=0, Total=1406 [2023-04-02 21:20:53,846 INFO L87 Difference]: Start difference. First operand 125 states and 176 transitions. Second operand has 25 states, 25 states have (on average 4.84) internal successors, (121), 25 states have internal predecessors, (121), 23 states have call successors, (112), 2 states have call predecessors, (112), 1 states have return successors, (110), 22 states have call predecessors, (110), 22 states have call successors, (110) [2023-04-02 21:20:54,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 21:20:54,049 INFO L93 Difference]: Finished difference Result 250 states and 372 transitions. [2023-04-02 21:20:54,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-04-02 21:20:54,049 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.84) internal successors, (121), 25 states have internal predecessors, (121), 23 states have call successors, (112), 2 states have call predecessors, (112), 1 states have return successors, (110), 22 states have call predecessors, (110), 22 states have call successors, (110) Word has length 226 [2023-04-02 21:20:54,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 21:20:54,052 INFO L225 Difference]: With dead ends: 250 [2023-04-02 21:20:54,052 INFO L226 Difference]: Without dead ends: 245 [2023-04-02 21:20:54,053 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 690 GetRequests, 574 SyntacticMatches, 80 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3367 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=344, Invalid=1062, Unknown=0, NotChecked=0, Total=1406 [2023-04-02 21:20:54,053 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 8 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 21:20:54,053 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 191 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 21:20:54,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2023-04-02 21:20:54,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 245. [2023-04-02 21:20:54,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 123 states have (on average 1.008130081300813) internal successors, (124), 123 states have internal predecessors, (124), 117 states have call successors, (117), 6 states have call predecessors, (117), 4 states have return successors, (115), 115 states have call predecessors, (115), 115 states have call successors, (115) [2023-04-02 21:20:54,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 356 transitions. [2023-04-02 21:20:54,071 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 356 transitions. Word has length 226 [2023-04-02 21:20:54,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 21:20:54,072 INFO L495 AbstractCegarLoop]: Abstraction has 245 states and 356 transitions. [2023-04-02 21:20:54,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.84) internal successors, (121), 25 states have internal predecessors, (121), 23 states have call successors, (112), 2 states have call predecessors, (112), 1 states have return successors, (110), 22 states have call predecessors, (110), 22 states have call successors, (110) [2023-04-02 21:20:54,072 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 356 transitions. [2023-04-02 21:20:54,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 467 [2023-04-02 21:20:54,078 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 21:20:54,078 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 21:20:54,097 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-04-02 21:20:54,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 21:20:54,283 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 21:20:54,284 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 21:20:54,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1271298034, now seen corresponding path program 4 times [2023-04-02 21:20:54,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 21:20:54,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416823175] [2023-04-02 21:20:54,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:20:54,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 21:20:54,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:20:55,136 INFO L134 CoverageAnalysis]: Checked inductivity of 6934 backedges. 0 proven. 2332 refuted. 0 times theorem prover too weak. 4602 trivial. 0 not checked. [2023-04-02 21:20:55,137 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 21:20:55,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416823175] [2023-04-02 21:20:55,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416823175] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 21:20:55,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906564762] [2023-04-02 21:20:55,137 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 21:20:55,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 21:20:55,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 21:20:55,145 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 21:20:55,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-02 21:20:55,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:20:55,358 INFO L262 TraceCheckSpWp]: Trace formula consists of 1169 conjuncts, 24 conjunts are in the unsatisfiable core [2023-04-02 21:20:55,371 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 21:20:55,583 INFO L134 CoverageAnalysis]: Checked inductivity of 6934 backedges. 0 proven. 2332 refuted. 0 times theorem prover too weak. 4602 trivial. 0 not checked. [2023-04-02 21:20:55,584 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 21:20:56,539 INFO L134 CoverageAnalysis]: Checked inductivity of 6934 backedges. 0 proven. 2332 refuted. 0 times theorem prover too weak. 4602 trivial. 0 not checked. [2023-04-02 21:20:56,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906564762] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 21:20:56,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [416120708] [2023-04-02 21:20:56,542 INFO L159 IcfgInterpreter]: Started Sifa with 34 locations of interest [2023-04-02 21:20:56,542 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 21:20:56,542 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 21:20:56,542 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 21:20:56,542 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 21:20:56,552 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-02 21:20:56,663 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 13 for LOIs [2023-04-02 21:20:56,666 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 27 for LOIs [2023-04-02 21:20:56,669 INFO L197 IcfgInterpreter]: Interpreting procedure g with input of size 9 for LOIs [2023-04-02 21:20:56,669 INFO L197 IcfgInterpreter]: Interpreting procedure f with input of size 9 for LOIs [2023-04-02 21:20:56,670 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 21:20:56,672 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 21:20:59,121 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6781#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 21:20:59,121 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 21:20:59,121 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 21:20:59,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2023-04-02 21:20:59,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501652644] [2023-04-02 21:20:59,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 21:20:59,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-04-02 21:20:59,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 21:20:59,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-04-02 21:20:59,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1220, Invalid=2562, Unknown=0, NotChecked=0, Total=3782 [2023-04-02 21:20:59,162 INFO L87 Difference]: Start difference. First operand 245 states and 356 transitions. Second operand has 49 states, 49 states have (on average 4.918367346938775) internal successors, (241), 49 states have internal predecessors, (241), 47 states have call successors, (232), 2 states have call predecessors, (232), 1 states have return successors, (230), 46 states have call predecessors, (230), 46 states have call successors, (230) [2023-04-02 21:20:59,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 21:20:59,564 INFO L93 Difference]: Finished difference Result 490 states and 744 transitions. [2023-04-02 21:20:59,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-04-02 21:20:59,565 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 4.918367346938775) internal successors, (241), 49 states have internal predecessors, (241), 47 states have call successors, (232), 2 states have call predecessors, (232), 1 states have return successors, (230), 46 states have call predecessors, (230), 46 states have call successors, (230) Word has length 466 [2023-04-02 21:20:59,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 21:20:59,569 INFO L225 Difference]: With dead ends: 490 [2023-04-02 21:20:59,569 INFO L226 Difference]: Without dead ends: 485 [2023-04-02 21:20:59,570 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1422 GetRequests, 1186 SyntacticMatches, 176 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13675 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1220, Invalid=2562, Unknown=0, NotChecked=0, Total=3782 [2023-04-02 21:20:59,570 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 8 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 21:20:59,570 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 260 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 21:20:59,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2023-04-02 21:20:59,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 485. [2023-04-02 21:20:59,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 243 states have (on average 1.0041152263374487) internal successors, (244), 243 states have internal predecessors, (244), 237 states have call successors, (237), 6 states have call predecessors, (237), 4 states have return successors, (235), 235 states have call predecessors, (235), 235 states have call successors, (235) [2023-04-02 21:20:59,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 716 transitions. [2023-04-02 21:20:59,616 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 716 transitions. Word has length 466 [2023-04-02 21:20:59,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 21:20:59,620 INFO L495 AbstractCegarLoop]: Abstraction has 485 states and 716 transitions. [2023-04-02 21:20:59,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 4.918367346938775) internal successors, (241), 49 states have internal predecessors, (241), 47 states have call successors, (232), 2 states have call predecessors, (232), 1 states have return successors, (230), 46 states have call predecessors, (230), 46 states have call successors, (230) [2023-04-02 21:20:59,621 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 716 transitions. [2023-04-02 21:20:59,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 947 [2023-04-02 21:20:59,641 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 21:20:59,641 INFO L195 NwaCegarLoop]: trace histogram [94, 94, 46, 46, 46, 46, 46, 46, 46, 46, 46, 46, 46, 46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 21:20:59,659 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-02 21:20:59,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 21:20:59,846 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 21:20:59,847 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 21:20:59,847 INFO L85 PathProgramCache]: Analyzing trace with hash 986480950, now seen corresponding path program 5 times [2023-04-02 21:20:59,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 21:20:59,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193247378] [2023-04-02 21:20:59,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:20:59,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 21:20:59,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:21:02,814 INFO L134 CoverageAnalysis]: Checked inductivity of 29950 backedges. 0 proven. 10396 refuted. 0 times theorem prover too weak. 19554 trivial. 0 not checked. [2023-04-02 21:21:02,814 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 21:21:02,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193247378] [2023-04-02 21:21:02,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193247378] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 21:21:02,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845487946] [2023-04-02 21:21:02,814 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 21:21:02,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 21:21:02,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 21:21:02,826 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 21:21:02,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-02 21:21:03,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 62 check-sat command(s) [2023-04-02 21:21:03,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 21:21:03,321 INFO L262 TraceCheckSpWp]: Trace formula consists of 2345 conjuncts, 48 conjunts are in the unsatisfiable core [2023-04-02 21:21:03,333 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 21:21:03,850 INFO L134 CoverageAnalysis]: Checked inductivity of 29950 backedges. 0 proven. 10396 refuted. 0 times theorem prover too weak. 19554 trivial. 0 not checked. [2023-04-02 21:21:03,850 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 21:21:06,519 INFO L134 CoverageAnalysis]: Checked inductivity of 29950 backedges. 0 proven. 10396 refuted. 0 times theorem prover too weak. 19554 trivial. 0 not checked. [2023-04-02 21:21:06,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845487946] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 21:21:06,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2033448363] [2023-04-02 21:21:06,521 INFO L159 IcfgInterpreter]: Started Sifa with 34 locations of interest [2023-04-02 21:21:06,521 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 21:21:06,522 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 21:21:06,522 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 21:21:06,522 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 21:21:06,553 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-02 21:21:06,716 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 13 for LOIs [2023-04-02 21:21:06,720 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 27 for LOIs [2023-04-02 21:21:06,723 INFO L197 IcfgInterpreter]: Interpreting procedure g with input of size 9 for LOIs [2023-04-02 21:21:06,723 INFO L197 IcfgInterpreter]: Interpreting procedure f with input of size 9 for LOIs [2023-04-02 21:21:06,725 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 21:21:06,727 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 21:21:14,487 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14121#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 21:21:14,488 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 21:21:14,488 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 21:21:14,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 97 [2023-04-02 21:21:14,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793626676] [2023-04-02 21:21:14,489 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 21:21:14,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2023-04-02 21:21:14,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 21:21:14,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2023-04-02 21:21:14,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4700, Invalid=7290, Unknown=0, NotChecked=0, Total=11990 [2023-04-02 21:21:14,496 INFO L87 Difference]: Start difference. First operand 485 states and 716 transitions. Second operand has 97 states, 97 states have (on average 4.958762886597938) internal successors, (481), 97 states have internal predecessors, (481), 95 states have call successors, (472), 2 states have call predecessors, (472), 1 states have return successors, (470), 94 states have call predecessors, (470), 94 states have call successors, (470) [2023-04-02 21:21:15,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 21:21:15,268 INFO L93 Difference]: Finished difference Result 970 states and 1488 transitions. [2023-04-02 21:21:15,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2023-04-02 21:21:15,269 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 4.958762886597938) internal successors, (481), 97 states have internal predecessors, (481), 95 states have call successors, (472), 2 states have call predecessors, (472), 1 states have return successors, (470), 94 states have call predecessors, (470), 94 states have call successors, (470) Word has length 946 [2023-04-02 21:21:15,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 21:21:15,275 INFO L225 Difference]: With dead ends: 970 [2023-04-02 21:21:15,275 INFO L226 Difference]: Without dead ends: 965 [2023-04-02 21:21:15,278 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2886 GetRequests, 2410 SyntacticMatches, 368 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55027 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=4700, Invalid=7290, Unknown=0, NotChecked=0, Total=11990 [2023-04-02 21:21:15,278 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 8 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 690 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-02 21:21:15,278 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 407 Invalid, 692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 690 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-02 21:21:15,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 965 states. [2023-04-02 21:21:15,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 965 to 965. [2023-04-02 21:21:15,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 965 states, 483 states have (on average 1.0020703933747412) internal successors, (484), 483 states have internal predecessors, (484), 477 states have call successors, (477), 6 states have call predecessors, (477), 4 states have return successors, (475), 475 states have call predecessors, (475), 475 states have call successors, (475) [2023-04-02 21:21:15,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 965 states to 965 states and 1436 transitions. [2023-04-02 21:21:15,313 INFO L78 Accepts]: Start accepts. Automaton has 965 states and 1436 transitions. Word has length 946 [2023-04-02 21:21:15,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 21:21:15,314 INFO L495 AbstractCegarLoop]: Abstraction has 965 states and 1436 transitions. [2023-04-02 21:21:15,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 4.958762886597938) internal successors, (481), 97 states have internal predecessors, (481), 95 states have call successors, (472), 2 states have call predecessors, (472), 1 states have return successors, (470), 94 states have call predecessors, (470), 94 states have call successors, (470) [2023-04-02 21:21:15,315 INFO L276 IsEmpty]: Start isEmpty. Operand 965 states and 1436 transitions. [2023-04-02 21:21:15,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1907 [2023-04-02 21:21:15,361 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 21:21:15,362 INFO L195 NwaCegarLoop]: trace histogram [190, 190, 94, 94, 94, 94, 94, 94, 94, 94, 94, 94, 94, 94, 94, 94, 94, 94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 21:21:15,370 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-02 21:21:15,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 21:21:15,570 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 21:21:15,571 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 21:21:15,571 INFO L85 PathProgramCache]: Analyzing trace with hash 1384141702, now seen corresponding path program 6 times [2023-04-02 21:21:15,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 21:21:15,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690420400] [2023-04-02 21:21:15,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:21:15,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 21:21:15,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:21:29,989 INFO L134 CoverageAnalysis]: Checked inductivity of 124366 backedges. 0 proven. 43804 refuted. 0 times theorem prover too weak. 80562 trivial. 0 not checked. [2023-04-02 21:21:29,989 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 21:21:29,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690420400] [2023-04-02 21:21:29,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690420400] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 21:21:29,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498704418] [2023-04-02 21:21:29,989 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 21:21:29,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 21:21:29,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 21:21:30,008 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 21:21:30,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-02 21:21:30,712 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 21:21:30,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 21:21:30,732 INFO L262 TraceCheckSpWp]: Trace formula consists of 4697 conjuncts, 96 conjunts are in the unsatisfiable core [2023-04-02 21:21:30,755 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 21:21:31,773 INFO L134 CoverageAnalysis]: Checked inductivity of 124366 backedges. 0 proven. 43804 refuted. 0 times theorem prover too weak. 80562 trivial. 0 not checked. [2023-04-02 21:21:31,773 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 21:21:41,082 INFO L134 CoverageAnalysis]: Checked inductivity of 124366 backedges. 0 proven. 43804 refuted. 0 times theorem prover too weak. 80562 trivial. 0 not checked. [2023-04-02 21:21:41,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498704418] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 21:21:41,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [810467129] [2023-04-02 21:21:41,084 INFO L159 IcfgInterpreter]: Started Sifa with 34 locations of interest [2023-04-02 21:21:41,084 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 21:21:41,084 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 21:21:41,084 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 21:21:41,085 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 21:21:41,106 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-02 21:21:41,215 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 13 for LOIs [2023-04-02 21:21:41,220 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 27 for LOIs [2023-04-02 21:21:41,223 INFO L197 IcfgInterpreter]: Interpreting procedure g with input of size 9 for LOIs [2023-04-02 21:21:41,224 INFO L197 IcfgInterpreter]: Interpreting procedure f with input of size 9 for LOIs [2023-04-02 21:21:41,224 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 21:21:41,227 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 21:22:08,976 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '28853#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 21:22:08,976 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 21:22:08,977 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 21:22:08,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97, 97] total 193 [2023-04-02 21:22:08,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136192988] [2023-04-02 21:22:08,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 21:22:09,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 193 states [2023-04-02 21:22:09,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 21:22:09,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2023-04-02 21:22:09,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18572, Invalid=23658, Unknown=0, NotChecked=0, Total=42230 [2023-04-02 21:22:09,029 INFO L87 Difference]: Start difference. First operand 965 states and 1436 transitions. Second operand has 193 states, 193 states have (on average 4.979274611398964) internal successors, (961), 193 states have internal predecessors, (961), 191 states have call successors, (952), 2 states have call predecessors, (952), 1 states have return successors, (950), 190 states have call predecessors, (950), 190 states have call successors, (950) [2023-04-02 21:22:12,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 21:22:12,330 INFO L93 Difference]: Finished difference Result 1930 states and 2976 transitions. [2023-04-02 21:22:12,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2023-04-02 21:22:12,331 INFO L78 Accepts]: Start accepts. Automaton has has 193 states, 193 states have (on average 4.979274611398964) internal successors, (961), 193 states have internal predecessors, (961), 191 states have call successors, (952), 2 states have call predecessors, (952), 1 states have return successors, (950), 190 states have call predecessors, (950), 190 states have call successors, (950) Word has length 1906 [2023-04-02 21:22:12,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 21:22:12,340 INFO L225 Difference]: With dead ends: 1930 [2023-04-02 21:22:12,340 INFO L226 Difference]: Without dead ends: 1925 [2023-04-02 21:22:12,343 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5814 GetRequests, 4858 SyntacticMatches, 752 SemanticMatches, 204 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220675 ImplicationChecksByTransitivity, 37.1s TimeCoverageRelationStatistics Valid=18572, Invalid=23658, Unknown=0, NotChecked=0, Total=42230 [2023-04-02 21:22:12,344 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 8 mSDsluCounter, 777 mSDsCounter, 0 mSdLazyCounter, 1392 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 810 SdHoareTripleChecker+Invalid, 1394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-04-02 21:22:12,344 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 810 Invalid, 1394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1392 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-04-02 21:22:12,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1925 states. [2023-04-02 21:22:12,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1925 to 1925. [2023-04-02 21:22:12,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1925 states, 963 states have (on average 1.0010384215991692) internal successors, (964), 963 states have internal predecessors, (964), 957 states have call successors, (957), 6 states have call predecessors, (957), 4 states have return successors, (955), 955 states have call predecessors, (955), 955 states have call successors, (955) [2023-04-02 21:22:12,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1925 states to 1925 states and 2876 transitions. [2023-04-02 21:22:12,401 INFO L78 Accepts]: Start accepts. Automaton has 1925 states and 2876 transitions. Word has length 1906 [2023-04-02 21:22:12,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 21:22:12,403 INFO L495 AbstractCegarLoop]: Abstraction has 1925 states and 2876 transitions. [2023-04-02 21:22:12,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 193 states, 193 states have (on average 4.979274611398964) internal successors, (961), 193 states have internal predecessors, (961), 191 states have call successors, (952), 2 states have call predecessors, (952), 1 states have return successors, (950), 190 states have call predecessors, (950), 190 states have call successors, (950) [2023-04-02 21:22:12,405 INFO L276 IsEmpty]: Start isEmpty. Operand 1925 states and 2876 transitions. [2023-04-02 21:22:12,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3827 [2023-04-02 21:22:12,478 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 21:22:12,478 INFO L195 NwaCegarLoop]: trace histogram [382, 382, 190, 190, 190, 190, 190, 190, 190, 190, 190, 190, 190, 190, 190, 190, 190, 190, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 21:22:12,490 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-04-02 21:22:12,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 21:22:12,689 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 21:22:12,690 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 21:22:12,690 INFO L85 PathProgramCache]: Analyzing trace with hash -1306560474, now seen corresponding path program 7 times [2023-04-02 21:22:12,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 21:22:12,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215414734] [2023-04-02 21:22:12,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:22:12,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 21:22:12,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:24:04,603 INFO L134 CoverageAnalysis]: Checked inductivity of 506734 backedges. 0 proven. 179740 refuted. 0 times theorem prover too weak. 326994 trivial. 0 not checked. [2023-04-02 21:24:04,603 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 21:24:04,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215414734] [2023-04-02 21:24:04,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215414734] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 21:24:04,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836312817] [2023-04-02 21:24:04,603 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 21:24:04,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 21:24:04,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 21:24:04,606 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 21:24:04,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-02 21:24:05,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:24:05,989 INFO L262 TraceCheckSpWp]: Trace formula consists of 9401 conjuncts, 192 conjunts are in the unsatisfiable core [2023-04-02 21:24:06,056 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 21:24:08,182 INFO L134 CoverageAnalysis]: Checked inductivity of 506734 backedges. 0 proven. 179740 refuted. 0 times theorem prover too weak. 326994 trivial. 0 not checked. [2023-04-02 21:24:08,182 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 21:24:36,851 INFO L134 CoverageAnalysis]: Checked inductivity of 506734 backedges. 0 proven. 179740 refuted. 0 times theorem prover too weak. 326994 trivial. 0 not checked. [2023-04-02 21:24:36,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836312817] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 21:24:36,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1289436098] [2023-04-02 21:24:36,858 INFO L159 IcfgInterpreter]: Started Sifa with 34 locations of interest [2023-04-02 21:24:36,858 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 21:24:36,858 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 21:24:36,858 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 21:24:36,858 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 21:24:36,867 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-02 21:24:36,990 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 13 for LOIs [2023-04-02 21:24:36,992 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 27 for LOIs [2023-04-02 21:24:36,995 INFO L197 IcfgInterpreter]: Interpreting procedure g with input of size 9 for LOIs [2023-04-02 21:24:36,996 INFO L197 IcfgInterpreter]: Interpreting procedure f with input of size 9 for LOIs [2023-04-02 21:24:36,997 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 21:24:36,999 INFO L180 IcfgInterpreter]: Interpretation finished