/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 IntervalDomain -i ../sv-benchmarks/c/loops-crafted-1/mono-crafted_14.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 23:05:13,697 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 23:05:13,700 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 23:05:13,739 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 23:05:13,739 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 23:05:13,742 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 23:05:13,745 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 23:05:13,747 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 23:05:13,749 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 23:05:13,754 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 23:05:13,755 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 23:05:13,757 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 23:05:13,758 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 23:05:13,760 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 23:05:13,763 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 23:05:13,764 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 23:05:13,765 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 23:05:13,766 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 23:05:13,767 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 23:05:13,772 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 23:05:13,774 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 23:05:13,775 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 23:05:13,776 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 23:05:13,777 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 23:05:13,785 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-31 23:05:13,785 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-31 23:05:13,786 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-31 23:05:13,787 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-31 23:05:13,787 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-31 23:05:13,788 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-31 23:05:13,788 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 23:05:13,789 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 23:05:13,790 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 23:05:13,791 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 23:05:13,791 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 23:05:13,791 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 23:05:13,792 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 23:05:13,792 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 23:05:13,792 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 23:05:13,793 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 23:05:13,794 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 23:05:13,795 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 [2023-03-31 23:05:13,824 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 23:05:13,824 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 23:05:13,825 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 23:05:13,825 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 23:05:13,825 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 23:05:13,826 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 23:05:13,826 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 23:05:13,826 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 23:05:13,826 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 23:05:13,826 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 23:05:13,827 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 23:05:13,827 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 23:05:13,827 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 23:05:13,827 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 23:05:13,827 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 23:05:13,827 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 23:05:13,828 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 23:05:13,828 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 23:05:13,829 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 23:05:13,829 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 23:05:13,829 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 23:05:13,829 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 23:05:13,829 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 23:05:13,829 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 23:05:13,829 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 23:05:13,829 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 23:05:13,829 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 23:05:13,830 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 23:05:13,830 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 23:05:13,830 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 23:05:13,830 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 23:05:13,830 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 23:05:13,830 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 23:05:13,831 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 23:05:13,831 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 23:05:13,831 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 23:05:13,831 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 23:05:13,831 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 23:05:13,831 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 23:05:13,831 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 23:05:13,831 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 23:05:13,831 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 23:05:14,034 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 23:05:14,063 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 23:05:14,065 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 23:05:14,066 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 23:05:14,067 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 23:05:14,068 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops-crafted-1/mono-crafted_14.c [2023-03-31 23:05:15,219 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 23:05:15,409 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 23:05:15,409 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/mono-crafted_14.c [2023-03-31 23:05:15,414 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cc33ff142/bcf027cd18bb41139b7173d0f1b26d47/FLAG97517ce18 [2023-03-31 23:05:15,425 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cc33ff142/bcf027cd18bb41139b7173d0f1b26d47 [2023-03-31 23:05:15,427 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 23:05:15,428 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 23:05:15,430 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 23:05:15,430 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 23:05:15,433 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 23:05:15,434 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 11:05:15" (1/1) ... [2023-03-31 23:05:15,435 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2db5eb23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:05:15, skipping insertion in model container [2023-03-31 23:05:15,435 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 11:05:15" (1/1) ... [2023-03-31 23:05:15,441 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 23:05:15,451 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 23:05:15,604 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/loops-crafted-1/mono-crafted_14.c[319,332] [2023-03-31 23:05:15,623 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 23:05:15,632 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 23:05:15,645 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/loops-crafted-1/mono-crafted_14.c[319,332] [2023-03-31 23:05:15,650 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 23:05:15,668 INFO L208 MainTranslator]: Completed translation [2023-03-31 23:05:15,668 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:05:15 WrapperNode [2023-03-31 23:05:15,669 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 23:05:15,670 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 23:05:15,670 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 23:05:15,670 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 23:05:15,682 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:05:15" (1/1) ... [2023-03-31 23:05:15,682 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:05:15" (1/1) ... [2023-03-31 23:05:15,689 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:05:15" (1/1) ... [2023-03-31 23:05:15,689 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:05:15" (1/1) ... [2023-03-31 23:05:15,698 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:05:15" (1/1) ... [2023-03-31 23:05:15,701 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:05:15" (1/1) ... [2023-03-31 23:05:15,706 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:05:15" (1/1) ... [2023-03-31 23:05:15,706 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:05:15" (1/1) ... [2023-03-31 23:05:15,712 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 23:05:15,713 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 23:05:15,714 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 23:05:15,714 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 23:05:15,715 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:05:15" (1/1) ... [2023-03-31 23:05:15,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 23:05:15,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:05:15,750 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) [2023-03-31 23:05:15,773 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 [2023-03-31 23:05:15,788 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 23:05:15,788 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 23:05:15,788 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 23:05:15,789 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-03-31 23:05:15,789 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 23:05:15,789 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 23:05:15,789 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 23:05:15,789 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 23:05:15,789 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 23:05:15,789 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-03-31 23:05:15,789 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 23:05:15,789 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 23:05:15,789 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 23:05:15,790 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 23:05:15,790 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 23:05:15,790 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 23:05:15,790 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 23:05:15,851 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 23:05:15,853 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 23:05:16,017 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 23:05:16,039 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 23:05:16,039 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-03-31 23:05:16,041 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 11:05:16 BoogieIcfgContainer [2023-03-31 23:05:16,041 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 23:05:16,043 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 23:05:16,043 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 23:05:16,070 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 23:05:16,070 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 11:05:15" (1/3) ... [2023-03-31 23:05:16,071 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@981d2a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 11:05:16, skipping insertion in model container [2023-03-31 23:05:16,071 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:05:15" (2/3) ... [2023-03-31 23:05:16,071 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@981d2a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 11:05:16, skipping insertion in model container [2023-03-31 23:05:16,071 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 11:05:16" (3/3) ... [2023-03-31 23:05:16,072 INFO L112 eAbstractionObserver]: Analyzing ICFG mono-crafted_14.c [2023-03-31 23:05:16,099 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 23:05:16,099 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 23:05:16,150 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 23:05:16,157 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;@d70a956, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 23:05:16,158 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 23:05:16,161 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-31 23:05:16,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-03-31 23:05:16,168 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:05:16,169 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:05:16,170 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:05:16,175 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:05:16,175 INFO L85 PathProgramCache]: Analyzing trace with hash -233365237, now seen corresponding path program 1 times [2023-03-31 23:05:16,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:05:16,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074823366] [2023-03-31 23:05:16,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:05:16,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:05:16,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:05:16,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 23:05:16,405 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:05:16,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074823366] [2023-03-31 23:05:16,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074823366] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:05:16,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 23:05:16,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 23:05:16,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049683093] [2023-03-31 23:05:16,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:05:16,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 23:05:16,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:05:16,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 23:05:16,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 23:05:16,437 INFO L87 Difference]: Start difference. First operand has 19 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 23:05:16,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:05:16,469 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2023-03-31 23:05:16,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 23:05:16,472 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-03-31 23:05:16,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:05:16,478 INFO L225 Difference]: With dead ends: 33 [2023-03-31 23:05:16,479 INFO L226 Difference]: Without dead ends: 16 [2023-03-31 23:05:16,481 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 [2023-03-31 23:05:16,485 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 23:05:16,486 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 29 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 23:05:16,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2023-03-31 23:05:16,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2023-03-31 23:05:16,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 23:05:16,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2023-03-31 23:05:16,537 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 11 [2023-03-31 23:05:16,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:05:16,538 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2023-03-31 23:05:16,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 23:05:16,539 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2023-03-31 23:05:16,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-03-31 23:05:16,540 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:05:16,541 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:05:16,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 23:05:16,541 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:05:16,544 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:05:16,544 INFO L85 PathProgramCache]: Analyzing trace with hash 560904630, now seen corresponding path program 1 times [2023-03-31 23:05:16,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:05:16,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833206267] [2023-03-31 23:05:16,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:05:16,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:05:16,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:05:16,741 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 23:05:16,741 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:05:16,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833206267] [2023-03-31 23:05:16,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833206267] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 23:05:16,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858884485] [2023-03-31 23:05:16,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:05:16,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:05:16,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:05:16,746 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) [2023-03-31 23:05:16,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-31 23:05:16,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:05:16,809 INFO L262 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-31 23:05:16,813 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:05:16,870 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 23:05:16,870 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 23:05:16,988 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 23:05:16,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858884485] provided 1 perfect and 1 imperfect interpolant sequences [2023-03-31 23:05:16,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-03-31 23:05:16,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2023-03-31 23:05:16,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238425688] [2023-03-31 23:05:16,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:05:16,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 23:05:16,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:05:16,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 23:05:16,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-03-31 23:05:16,991 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 23:05:17,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:05:17,008 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2023-03-31 23:05:17,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 23:05:17,008 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2023-03-31 23:05:17,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:05:17,009 INFO L225 Difference]: With dead ends: 25 [2023-03-31 23:05:17,009 INFO L226 Difference]: Without dead ends: 17 [2023-03-31 23:05:17,010 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-03-31 23:05:17,011 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 23:05:17,011 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 33 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 23:05:17,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-03-31 23:05:17,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-03-31 23:05:17,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 23:05:17,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2023-03-31 23:05:17,015 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 12 [2023-03-31 23:05:17,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:05:17,015 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2023-03-31 23:05:17,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 23:05:17,016 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2023-03-31 23:05:17,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-03-31 23:05:17,016 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:05:17,016 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:05:17,025 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-03-31 23:05:17,222 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 [2023-03-31 23:05:17,223 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:05:17,223 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:05:17,223 INFO L85 PathProgramCache]: Analyzing trace with hash -643791571, now seen corresponding path program 1 times [2023-03-31 23:05:17,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:05:17,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512652708] [2023-03-31 23:05:17,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:05:17,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:05:17,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:05:17,302 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-31 23:05:17,302 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:05:17,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512652708] [2023-03-31 23:05:17,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512652708] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 23:05:17,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444655303] [2023-03-31 23:05:17,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:05:17,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:05:17,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:05:17,305 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) [2023-03-31 23:05:17,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-31 23:05:17,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:05:17,348 INFO L262 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 3 conjunts are in the unsatisfiable core [2023-03-31 23:05:17,349 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:05:17,366 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-31 23:05:17,367 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 23:05:17,439 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-31 23:05:17,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444655303] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 23:05:17,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1333471712] [2023-03-31 23:05:17,459 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2023-03-31 23:05:17,460 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 23:05:17,462 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 23:05:17,466 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 23:05:17,467 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 23:05:17,536 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 8 for LOIs [2023-03-31 23:05:17,650 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 23 for LOIs [2023-03-31 23:05:17,675 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 23:05:17,689 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 23:05:17,918 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '323#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 23:05:17,918 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 23:05:17,918 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 23:05:17,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-03-31 23:05:17,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407194855] [2023-03-31 23:05:17,919 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 23:05:17,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-03-31 23:05:17,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:05:17,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-03-31 23:05:17,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2023-03-31 23:05:17,923 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 23:05:17,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:05:17,944 INFO L93 Difference]: Finished difference Result 30 states and 36 transitions. [2023-03-31 23:05:17,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-31 23:05:17,944 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2023-03-31 23:05:17,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:05:17,945 INFO L225 Difference]: With dead ends: 30 [2023-03-31 23:05:17,945 INFO L226 Difference]: Without dead ends: 20 [2023-03-31 23:05:17,946 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2023-03-31 23:05:17,947 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 23:05:17,947 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 33 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 23:05:17,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-03-31 23:05:17,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2023-03-31 23:05:17,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 14 states have internal predecessors, (16), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 23:05:17,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2023-03-31 23:05:17,952 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 13 [2023-03-31 23:05:17,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:05:17,952 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2023-03-31 23:05:17,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 23:05:17,952 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2023-03-31 23:05:17,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-03-31 23:05:17,953 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:05:17,953 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:05:17,961 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-03-31 23:05:18,159 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 [2023-03-31 23:05:18,159 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:05:18,160 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:05:18,160 INFO L85 PathProgramCache]: Analyzing trace with hash -413594184, now seen corresponding path program 2 times [2023-03-31 23:05:18,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:05:18,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70393572] [2023-03-31 23:05:18,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:05:18,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:05:18,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:05:18,346 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-31 23:05:18,346 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:05:18,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70393572] [2023-03-31 23:05:18,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70393572] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 23:05:18,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439347202] [2023-03-31 23:05:18,347 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-31 23:05:18,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:05:18,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:05:18,349 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) [2023-03-31 23:05:18,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-03-31 23:05:18,396 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-03-31 23:05:18,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 23:05:18,397 INFO L262 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 6 conjunts are in the unsatisfiable core [2023-03-31 23:05:18,399 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:05:18,434 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-31 23:05:18,434 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 23:05:18,627 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-31 23:05:18,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439347202] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 23:05:18,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [754858205] [2023-03-31 23:05:18,630 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2023-03-31 23:05:18,630 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 23:05:18,631 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 23:05:18,631 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 23:05:18,631 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 23:05:18,667 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 8 for LOIs [2023-03-31 23:05:18,738 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 23 for LOIs [2023-03-31 23:05:18,758 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 23:05:18,781 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 23:05:18,979 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '521#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 23:05:18,979 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 23:05:18,982 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 23:05:18,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-03-31 23:05:18,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976823624] [2023-03-31 23:05:18,982 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 23:05:18,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-03-31 23:05:18,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:05:18,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-03-31 23:05:18,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2023-03-31 23:05:18,984 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 23:05:19,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:05:19,028 INFO L93 Difference]: Finished difference Result 36 states and 45 transitions. [2023-03-31 23:05:19,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-03-31 23:05:19,029 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2023-03-31 23:05:19,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:05:19,031 INFO L225 Difference]: With dead ends: 36 [2023-03-31 23:05:19,031 INFO L226 Difference]: Without dead ends: 26 [2023-03-31 23:05:19,032 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2023-03-31 23:05:19,038 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 23:05:19,040 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 53 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 23:05:19,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-03-31 23:05:19,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2023-03-31 23:05:19,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 23:05:19,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2023-03-31 23:05:19,053 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 16 [2023-03-31 23:05:19,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:05:19,053 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2023-03-31 23:05:19,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 23:05:19,054 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2023-03-31 23:05:19,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-03-31 23:05:19,055 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:05:19,055 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:05:19,063 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-03-31 23:05:19,260 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 [2023-03-31 23:05:19,261 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:05:19,261 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:05:19,261 INFO L85 PathProgramCache]: Analyzing trace with hash -1998100072, now seen corresponding path program 3 times [2023-03-31 23:05:19,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:05:19,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567583848] [2023-03-31 23:05:19,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:05:19,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:05:19,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:05:19,613 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-31 23:05:19,613 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:05:19,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567583848] [2023-03-31 23:05:19,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567583848] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 23:05:19,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341374472] [2023-03-31 23:05:19,613 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-03-31 23:05:19,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:05:19,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:05:19,615 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) [2023-03-31 23:05:19,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-03-31 23:05:19,670 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-03-31 23:05:19,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 23:05:19,671 INFO L262 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 12 conjunts are in the unsatisfiable core [2023-03-31 23:05:19,673 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:05:19,716 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-31 23:05:19,717 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 23:05:20,117 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-31 23:05:20,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341374472] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 23:05:20,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [752075287] [2023-03-31 23:05:20,123 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2023-03-31 23:05:20,124 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 23:05:20,124 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 23:05:20,124 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 23:05:20,124 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 23:05:20,145 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 8 for LOIs [2023-03-31 23:05:20,198 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 23 for LOIs [2023-03-31 23:05:20,207 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 23:05:20,212 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 23:05:20,414 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '791#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 23:05:20,414 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 23:05:20,414 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 23:05:20,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2023-03-31 23:05:20,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882250733] [2023-03-31 23:05:20,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 23:05:20,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-03-31 23:05:20,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:05:20,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-03-31 23:05:20,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=792, Unknown=0, NotChecked=0, Total=1122 [2023-03-31 23:05:20,417 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand has 25 states, 25 states have (on average 1.28) internal successors, (32), 25 states have internal predecessors, (32), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 23:05:20,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:05:20,468 INFO L93 Difference]: Finished difference Result 48 states and 63 transitions. [2023-03-31 23:05:20,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-03-31 23:05:20,469 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.28) internal successors, (32), 25 states have internal predecessors, (32), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2023-03-31 23:05:20,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:05:20,470 INFO L225 Difference]: With dead ends: 48 [2023-03-31 23:05:20,470 INFO L226 Difference]: Without dead ends: 38 [2023-03-31 23:05:20,470 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=330, Invalid=792, Unknown=0, NotChecked=0, Total=1122 [2023-03-31 23:05:20,471 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 23:05:20,471 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 63 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 23:05:20,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-03-31 23:05:20,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2023-03-31 23:05:20,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 31 states have (on average 1.096774193548387) internal successors, (34), 32 states have internal predecessors, (34), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 23:05:20,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2023-03-31 23:05:20,477 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 22 [2023-03-31 23:05:20,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:05:20,477 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2023-03-31 23:05:20,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.28) internal successors, (32), 25 states have internal predecessors, (32), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 23:05:20,477 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2023-03-31 23:05:20,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-03-31 23:05:20,478 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:05:20,478 INFO L195 NwaCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:05:20,485 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-03-31 23:05:20,683 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 [2023-03-31 23:05:20,684 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:05:20,684 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:05:20,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1794959704, now seen corresponding path program 4 times [2023-03-31 23:05:20,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:05:20,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910943998] [2023-03-31 23:05:20,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:05:20,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:05:20,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:05:21,702 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-31 23:05:21,702 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:05:21,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910943998] [2023-03-31 23:05:21,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910943998] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 23:05:21,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687821350] [2023-03-31 23:05:21,702 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-03-31 23:05:21,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:05:21,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:05:21,705 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) [2023-03-31 23:05:21,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-03-31 23:05:21,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:05:21,774 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 24 conjunts are in the unsatisfiable core [2023-03-31 23:05:21,777 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:05:21,858 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-31 23:05:21,858 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 23:05:22,879 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-31 23:05:22,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687821350] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 23:05:22,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1475887493] [2023-03-31 23:05:22,882 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2023-03-31 23:05:22,882 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 23:05:22,882 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 23:05:22,882 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 23:05:22,882 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 23:05:22,896 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 8 for LOIs [2023-03-31 23:05:22,935 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 23 for LOIs [2023-03-31 23:05:22,943 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 23:05:22,946 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 23:05:23,178 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1205#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 23:05:23,179 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 23:05:23,179 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 23:05:23,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2023-03-31 23:05:23,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914900018] [2023-03-31 23:05:23,179 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 23:05:23,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-03-31 23:05:23,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:05:23,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-03-31 23:05:23,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1206, Invalid=2100, Unknown=0, NotChecked=0, Total=3306 [2023-03-31 23:05:23,182 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand has 49 states, 49 states have (on average 1.1428571428571428) internal successors, (56), 49 states have internal predecessors, (56), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 23:05:23,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:05:23,274 INFO L93 Difference]: Finished difference Result 72 states and 99 transitions. [2023-03-31 23:05:23,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-03-31 23:05:23,274 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.1428571428571428) internal successors, (56), 49 states have internal predecessors, (56), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2023-03-31 23:05:23,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:05:23,275 INFO L225 Difference]: With dead ends: 72 [2023-03-31 23:05:23,275 INFO L226 Difference]: Without dead ends: 62 [2023-03-31 23:05:23,276 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 719 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1206, Invalid=2100, Unknown=0, NotChecked=0, Total=3306 [2023-03-31 23:05:23,277 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 23:05:23,277 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 63 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 23:05:23,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2023-03-31 23:05:23,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2023-03-31 23:05:23,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 55 states have (on average 1.0545454545454545) internal successors, (58), 56 states have internal predecessors, (58), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 23:05:23,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2023-03-31 23:05:23,284 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 34 [2023-03-31 23:05:23,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:05:23,284 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2023-03-31 23:05:23,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.1428571428571428) internal successors, (56), 49 states have internal predecessors, (56), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 23:05:23,285 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2023-03-31 23:05:23,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-03-31 23:05:23,286 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:05:23,286 INFO L195 NwaCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:05:23,295 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-03-31 23:05:23,491 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 [2023-03-31 23:05:23,491 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:05:23,492 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:05:23,492 INFO L85 PathProgramCache]: Analyzing trace with hash 93522136, now seen corresponding path program 5 times [2023-03-31 23:05:23,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:05:23,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776206340] [2023-03-31 23:05:23,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:05:23,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:05:23,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:05:26,343 INFO L134 CoverageAnalysis]: Checked inductivity of 1082 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-31 23:05:26,343 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:05:26,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776206340] [2023-03-31 23:05:26,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776206340] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 23:05:26,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815839927] [2023-03-31 23:05:26,343 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-31 23:05:26,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:05:26,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:05:26,345 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) [2023-03-31 23:05:26,347 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-03-31 23:05:26,437 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2023-03-31 23:05:26,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 23:05:26,439 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 48 conjunts are in the unsatisfiable core [2023-03-31 23:05:26,447 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:05:26,558 INFO L134 CoverageAnalysis]: Checked inductivity of 1082 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-31 23:05:26,558 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 23:05:29,614 INFO L134 CoverageAnalysis]: Checked inductivity of 1082 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-31 23:05:29,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815839927] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 23:05:29,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2111019691] [2023-03-31 23:05:29,617 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2023-03-31 23:05:29,617 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 23:05:29,617 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 23:05:29,618 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 23:05:29,618 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 23:05:29,632 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 8 for LOIs [2023-03-31 23:05:29,662 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 23 for LOIs [2023-03-31 23:05:29,670 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 23:05:29,673 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 23:05:29,971 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1907#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 23:05:29,972 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 23:05:29,972 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 23:05:29,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 97 [2023-03-31 23:05:29,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728063385] [2023-03-31 23:05:29,972 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 23:05:29,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2023-03-31 23:05:29,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:05:29,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2023-03-31 23:05:29,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4686, Invalid=6444, Unknown=0, NotChecked=0, Total=11130 [2023-03-31 23:05:29,979 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand has 97 states, 97 states have (on average 1.0721649484536082) internal successors, (104), 97 states have internal predecessors, (104), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 23:05:30,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:05:30,137 INFO L93 Difference]: Finished difference Result 120 states and 171 transitions. [2023-03-31 23:05:30,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2023-03-31 23:05:30,138 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 1.0721649484536082) internal successors, (104), 97 states have internal predecessors, (104), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2023-03-31 23:05:30,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:05:30,139 INFO L225 Difference]: With dead ends: 120 [2023-03-31 23:05:30,139 INFO L226 Difference]: Without dead ends: 110 [2023-03-31 23:05:30,142 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1463 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=4686, Invalid=6444, Unknown=0, NotChecked=0, Total=11130 [2023-03-31 23:05:30,143 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 23:05:30,143 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 83 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 23:05:30,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2023-03-31 23:05:30,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2023-03-31 23:05:30,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 103 states have (on average 1.029126213592233) internal successors, (106), 104 states have internal predecessors, (106), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 23:05:30,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 112 transitions. [2023-03-31 23:05:30,153 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 112 transitions. Word has length 58 [2023-03-31 23:05:30,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:05:30,154 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 112 transitions. [2023-03-31 23:05:30,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 1.0721649484536082) internal successors, (104), 97 states have internal predecessors, (104), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 23:05:30,154 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 112 transitions. [2023-03-31 23:05:30,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2023-03-31 23:05:30,156 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:05:30,156 INFO L195 NwaCegarLoop]: trace histogram [94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:05:30,167 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-03-31 23:05:30,363 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 [2023-03-31 23:05:30,363 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:05:30,364 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:05:30,364 INFO L85 PathProgramCache]: Analyzing trace with hash -190068776, now seen corresponding path program 6 times [2023-03-31 23:05:30,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:05:30,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880378841] [2023-03-31 23:05:30,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:05:30,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:05:30,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:05:38,951 INFO L134 CoverageAnalysis]: Checked inductivity of 4466 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-31 23:05:38,952 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:05:38,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880378841] [2023-03-31 23:05:38,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880378841] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 23:05:38,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856051461] [2023-03-31 23:05:38,952 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-03-31 23:05:38,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:05:38,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:05:38,953 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) [2023-03-31 23:05:38,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-03-31 23:05:39,056 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-03-31 23:05:39,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 23:05:39,059 INFO L262 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 96 conjunts are in the unsatisfiable core [2023-03-31 23:05:39,069 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:05:39,307 INFO L134 CoverageAnalysis]: Checked inductivity of 4466 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-31 23:05:39,307 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 23:05:48,910 INFO L134 CoverageAnalysis]: Checked inductivity of 4466 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-31 23:05:48,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856051461] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 23:05:48,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [663958347] [2023-03-31 23:05:48,912 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2023-03-31 23:05:48,912 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 23:05:48,913 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 23:05:48,913 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 23:05:48,913 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 23:05:48,929 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 8 for LOIs [2023-03-31 23:05:48,951 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 23 for LOIs [2023-03-31 23:05:48,957 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 23:05:48,959 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 23:05:49,417 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3185#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 23:05:49,417 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 23:05:49,417 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 23:05:49,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97, 97] total 193 [2023-03-31 23:05:49,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661339218] [2023-03-31 23:05:49,418 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 23:05:49,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 193 states [2023-03-31 23:05:49,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:05:49,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2023-03-31 23:05:49,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18558, Invalid=22044, Unknown=0, NotChecked=0, Total=40602 [2023-03-31 23:05:49,430 INFO L87 Difference]: Start difference. First operand 110 states and 112 transitions. Second operand has 193 states, 193 states have (on average 1.0362694300518134) internal successors, (200), 193 states have internal predecessors, (200), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 23:05:49,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:05:49,707 INFO L93 Difference]: Finished difference Result 216 states and 315 transitions. [2023-03-31 23:05:49,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2023-03-31 23:05:49,708 INFO L78 Accepts]: Start accepts. Automaton has has 193 states, 193 states have (on average 1.0362694300518134) internal successors, (200), 193 states have internal predecessors, (200), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 106 [2023-03-31 23:05:49,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:05:49,710 INFO L225 Difference]: With dead ends: 216 [2023-03-31 23:05:49,710 INFO L226 Difference]: Without dead ends: 206 [2023-03-31 23:05:49,713 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 414 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 200 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2951 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=18558, Invalid=22044, Unknown=0, NotChecked=0, Total=40602 [2023-03-31 23:05:49,714 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 23:05:49,714 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 43 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 23:05:49,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2023-03-31 23:05:49,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 206. [2023-03-31 23:05:49,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 199 states have (on average 1.015075376884422) internal successors, (202), 200 states have internal predecessors, (202), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 23:05:49,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 208 transitions. [2023-03-31 23:05:49,731 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 208 transitions. Word has length 106 [2023-03-31 23:05:49,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:05:49,731 INFO L495 AbstractCegarLoop]: Abstraction has 206 states and 208 transitions. [2023-03-31 23:05:49,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 193 states, 193 states have (on average 1.0362694300518134) internal successors, (200), 193 states have internal predecessors, (200), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 23:05:49,731 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 208 transitions. [2023-03-31 23:05:49,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2023-03-31 23:05:49,734 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:05:49,734 INFO L195 NwaCegarLoop]: trace histogram [190, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:05:49,743 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-03-31 23:05:49,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:05:49,943 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:05:49,944 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:05:49,944 INFO L85 PathProgramCache]: Analyzing trace with hash 2089764312, now seen corresponding path program 7 times [2023-03-31 23:05:49,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:05:49,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628802639] [2023-03-31 23:05:49,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:05:49,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:05:50,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat