/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain EqDomain -i ../sv-benchmarks/c/recursive-simple/id2_i5_o5-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 12:13:42,035 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 12:13:42,036 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 12:13:42,064 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 12:13:42,064 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 12:13:42,067 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 12:13:42,070 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 12:13:42,072 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 12:13:42,073 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 12:13:42,077 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 12:13:42,078 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 12:13:42,078 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 12:13:42,078 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 12:13:42,079 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 12:13:42,080 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 12:13:42,080 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 12:13:42,081 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 12:13:42,081 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 12:13:42,082 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 12:13:42,083 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 12:13:42,084 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 12:13:42,084 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 12:13:42,085 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 12:13:42,086 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 12:13:42,088 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 12:13:42,088 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 12:13:42,088 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 12:13:42,089 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 12:13:42,089 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 12:13:42,089 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 12:13:42,090 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 12:13:42,090 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 12:13:42,091 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 12:13:42,091 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 12:13:42,092 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 12:13:42,092 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 12:13:42,092 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 12:13:42,092 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 12:13:42,092 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 12:13:42,093 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 12:13:42,093 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 12:13:42,097 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 12:13:42,116 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 12:13:42,116 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 12:13:42,116 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 12:13:42,116 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 12:13:42,118 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 12:13:42,118 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 12:13:42,118 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 12:13:42,118 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 12:13:42,118 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 12:13:42,119 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 12:13:42,119 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 12:13:42,119 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 12:13:42,119 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 12:13:42,119 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 12:13:42,119 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 12:13:42,119 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 12:13:42,119 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 12:13:42,119 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 12:13:42,120 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 12:13:42,120 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 12:13:42,120 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 12:13:42,120 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 12:13:42,120 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 12:13:42,120 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 12:13:42,120 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 12:13:42,120 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 12:13:42,120 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 12:13:42,120 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 12:13:42,121 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 12:13:42,121 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 12:13:42,121 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 12:13:42,121 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 12:13:42,121 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 12:13:42,121 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 12:13:42,121 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 12:13:42,121 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 12:13:42,122 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 12:13:42,122 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 12:13:42,122 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 12:13:42,122 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 12:13:42,122 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 12:13:42,122 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 12:13:42,295 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 12:13:42,315 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 12:13:42,317 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 12:13:42,318 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 12:13:42,318 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 12:13:42,319 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/id2_i5_o5-1.c [2023-04-01 12:13:43,324 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 12:13:43,526 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 12:13:43,527 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/id2_i5_o5-1.c [2023-04-01 12:13:43,530 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/83d8c3a30/cf88da6621914a7ebc9061b9b5904163/FLAG5dde42214 [2023-04-01 12:13:43,540 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/83d8c3a30/cf88da6621914a7ebc9061b9b5904163 [2023-04-01 12:13:43,543 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 12:13:43,544 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 12:13:43,545 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 12:13:43,545 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 12:13:43,547 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 12:13:43,548 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:13:43" (1/1) ... [2023-04-01 12:13:43,548 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10573cc1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:13:43, skipping insertion in model container [2023-04-01 12:13:43,549 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:13:43" (1/1) ... [2023-04-01 12:13:43,554 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 12:13:43,565 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 12:13:43,660 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/recursive-simple/id2_i5_o5-1.c[548,561] [2023-04-01 12:13:43,663 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 12:13:43,672 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 12:13:43,682 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/recursive-simple/id2_i5_o5-1.c[548,561] [2023-04-01 12:13:43,683 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 12:13:43,693 INFO L208 MainTranslator]: Completed translation [2023-04-01 12:13:43,693 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:13:43 WrapperNode [2023-04-01 12:13:43,693 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 12:13:43,694 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 12:13:43,694 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 12:13:43,694 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 12:13:43,701 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:13:43" (1/1) ... [2023-04-01 12:13:43,701 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:13:43" (1/1) ... [2023-04-01 12:13:43,706 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:13:43" (1/1) ... [2023-04-01 12:13:43,706 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:13:43" (1/1) ... [2023-04-01 12:13:43,709 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:13:43" (1/1) ... [2023-04-01 12:13:43,710 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:13:43" (1/1) ... [2023-04-01 12:13:43,714 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:13:43" (1/1) ... [2023-04-01 12:13:43,715 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:13:43" (1/1) ... [2023-04-01 12:13:43,717 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 12:13:43,718 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 12:13:43,718 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 12:13:43,718 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 12:13:43,719 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:13:43" (1/1) ... [2023-04-01 12:13:43,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 12:13:43,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 12:13:43,741 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 12:13:43,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 12:13:43,769 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 12:13:43,770 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 12:13:43,770 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 12:13:43,770 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2023-04-01 12:13:43,770 INFO L138 BoogieDeclarations]: Found implementation of procedure id2 [2023-04-01 12:13:43,770 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 12:13:43,770 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 12:13:43,770 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 12:13:43,770 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 12:13:43,770 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 12:13:43,770 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 12:13:43,771 INFO L130 BoogieDeclarations]: Found specification of procedure id [2023-04-01 12:13:43,771 INFO L130 BoogieDeclarations]: Found specification of procedure id2 [2023-04-01 12:13:43,771 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 12:13:43,771 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 12:13:43,771 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 12:13:43,771 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 12:13:43,771 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 12:13:43,771 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 12:13:43,771 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 12:13:43,823 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 12:13:43,824 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 12:13:43,916 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 12:13:43,925 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 12:13:43,926 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-01 12:13:43,927 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:13:43 BoogieIcfgContainer [2023-04-01 12:13:43,927 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 12:13:43,931 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 12:13:43,931 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 12:13:43,934 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 12:13:43,934 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 12:13:43" (1/3) ... [2023-04-01 12:13:43,934 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@269a0313 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:13:43, skipping insertion in model container [2023-04-01 12:13:43,934 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:13:43" (2/3) ... [2023-04-01 12:13:43,935 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@269a0313 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:13:43, skipping insertion in model container [2023-04-01 12:13:43,935 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:13:43" (3/3) ... [2023-04-01 12:13:43,936 INFO L112 eAbstractionObserver]: Analyzing ICFG id2_i5_o5-1.c [2023-04-01 12:13:43,949 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 12:13:43,950 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 12:13:43,994 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 12:13:43,999 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;@206f37fb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 12:13:44,000 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 12:13:44,003 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-01 12:13:44,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-04-01 12:13:44,007 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:13:44,008 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:13:44,008 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:13:44,013 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:13:44,013 INFO L85 PathProgramCache]: Analyzing trace with hash 1088902710, now seen corresponding path program 1 times [2023-04-01 12:13:44,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:13:44,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902661460] [2023-04-01 12:13:44,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:13:44,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:13:44,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:13:44,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:13:44,218 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:13:44,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902661460] [2023-04-01 12:13:44,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902661460] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:13:44,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:13:44,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 12:13:44,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833254078] [2023-04-01 12:13:44,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:13:44,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 12:13:44,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:13:44,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 12:13:44,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 12:13:44,241 INFO L87 Difference]: Start difference. First operand has 26 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 12:13:44,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:13:44,270 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2023-04-01 12:13:44,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 12:13:44,271 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 13 [2023-04-01 12:13:44,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:13:44,276 INFO L225 Difference]: With dead ends: 38 [2023-04-01 12:13:44,276 INFO L226 Difference]: Without dead ends: 24 [2023-04-01 12:13:44,278 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 12:13:44,280 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 2 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:13:44,281 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 95 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:13:44,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-04-01 12:13:44,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-04-01 12:13:44,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 15 states have internal predecessors, (16), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2023-04-01 12:13:44,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2023-04-01 12:13:44,320 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 13 [2023-04-01 12:13:44,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:13:44,320 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2023-04-01 12:13:44,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 12:13:44,320 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2023-04-01 12:13:44,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-04-01 12:13:44,323 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:13:44,323 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:13:44,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 12:13:44,323 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:13:44,324 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:13:44,324 INFO L85 PathProgramCache]: Analyzing trace with hash 1018989271, now seen corresponding path program 1 times [2023-04-01 12:13:44,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:13:44,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9259997] [2023-04-01 12:13:44,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:13:44,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:13:44,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:13:44,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:13:44,438 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:13:44,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9259997] [2023-04-01 12:13:44,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9259997] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:13:44,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:13:44,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-01 12:13:44,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923453524] [2023-04-01 12:13:44,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:13:44,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 12:13:44,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:13:44,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 12:13:44,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 12:13:44,441 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 7 states, 6 states have (on average 2.0) internal successors, (12), 7 states have internal predecessors, (12), 3 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 12:13:44,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:13:44,501 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2023-04-01 12:13:44,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 12:13:44,502 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 7 states have internal predecessors, (12), 3 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 19 [2023-04-01 12:13:44,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:13:44,502 INFO L225 Difference]: With dead ends: 33 [2023-04-01 12:13:44,502 INFO L226 Difference]: Without dead ends: 29 [2023-04-01 12:13:44,503 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-04-01 12:13:44,504 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 13 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:13:44,504 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 69 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:13:44,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-04-01 12:13:44,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2023-04-01 12:13:44,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 16 states have (on average 1.125) internal successors, (18), 17 states have internal predecessors, (18), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2023-04-01 12:13:44,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2023-04-01 12:13:44,509 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 19 [2023-04-01 12:13:44,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:13:44,509 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2023-04-01 12:13:44,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 7 states have internal predecessors, (12), 3 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 12:13:44,509 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2023-04-01 12:13:44,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-04-01 12:13:44,510 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:13:44,510 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:13:44,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 12:13:44,510 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:13:44,510 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:13:44,510 INFO L85 PathProgramCache]: Analyzing trace with hash -1959056254, now seen corresponding path program 1 times [2023-04-01 12:13:44,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:13:44,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855898486] [2023-04-01 12:13:44,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:13:44,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:13:44,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:13:44,611 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 12:13:44,611 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:13:44,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855898486] [2023-04-01 12:13:44,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855898486] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 12:13:44,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357355842] [2023-04-01 12:13:44,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:13:44,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 12:13:44,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 12:13:44,641 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 12:13:44,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 12:13:44,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:13:44,687 INFO L262 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-01 12:13:44,690 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 12:13:44,775 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 12:13:44,776 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 12:13:45,117 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 12:13:45,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357355842] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 12:13:45,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [268017965] [2023-04-01 12:13:45,172 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-04-01 12:13:45,172 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 12:13:45,178 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:96) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-04-01 12:13:45,186 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 12:13:45,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 12 [2023-04-01 12:13:45,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845900389] [2023-04-01 12:13:45,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 12:13:45,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 12:13:45,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:13:45,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 12:13:45,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2023-04-01 12:13:45,188 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 12 states, 10 states have (on average 2.2) internal successors, (22), 12 states have internal predecessors, (22), 7 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 7 states have call successors, (7) [2023-04-01 12:13:45,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:13:45,264 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2023-04-01 12:13:45,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 12:13:45,264 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.2) internal successors, (22), 12 states have internal predecessors, (22), 7 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 7 states have call successors, (7) Word has length 25 [2023-04-01 12:13:45,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:13:45,265 INFO L225 Difference]: With dead ends: 39 [2023-04-01 12:13:45,265 INFO L226 Difference]: Without dead ends: 35 [2023-04-01 12:13:45,266 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2023-04-01 12:13:45,266 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 16 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:13:45,267 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 90 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:13:45,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-04-01 12:13:45,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 30. [2023-04-01 12:13:45,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 19 states have internal predecessors, (20), 5 states have call successors, (5), 4 states have call predecessors, (5), 6 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) [2023-04-01 12:13:45,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2023-04-01 12:13:45,271 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 25 [2023-04-01 12:13:45,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:13:45,271 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2023-04-01 12:13:45,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.2) internal successors, (22), 12 states have internal predecessors, (22), 7 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 7 states have call successors, (7) [2023-04-01 12:13:45,271 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2023-04-01 12:13:45,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-04-01 12:13:45,272 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:13:45,272 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:13:45,281 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-01 12:13:45,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 12:13:45,477 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:13:45,478 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:13:45,478 INFO L85 PathProgramCache]: Analyzing trace with hash 142733283, now seen corresponding path program 1 times [2023-04-01 12:13:45,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:13:45,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825696165] [2023-04-01 12:13:45,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:13:45,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:13:45,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:13:45,650 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 12:13:45,650 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:13:45,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825696165] [2023-04-01 12:13:45,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825696165] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 12:13:45,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528577595] [2023-04-01 12:13:45,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:13:45,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 12:13:45,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 12:13:45,655 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 12:13:45,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 12:13:45,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:13:45,695 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 10 conjunts are in the unsatisfiable core [2023-04-01 12:13:45,697 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 12:13:45,725 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 12:13:45,725 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 12:13:46,157 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 12:13:46,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528577595] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 12:13:46,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1706736386] [2023-04-01 12:13:46,159 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-04-01 12:13:46,159 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 12:13:46,160 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:96) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-04-01 12:13:46,160 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 12:13:46,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 11] total 14 [2023-04-01 12:13:46,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000105246] [2023-04-01 12:13:46,160 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 12:13:46,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-01 12:13:46,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:13:46,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-01 12:13:46,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2023-04-01 12:13:46,162 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 14 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 14 states have internal predecessors, (26), 8 states have call successors, (9), 1 states have call predecessors, (9), 5 states have return successors, (9), 5 states have call predecessors, (9), 8 states have call successors, (9) [2023-04-01 12:13:46,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:13:46,228 INFO L93 Difference]: Finished difference Result 45 states and 47 transitions. [2023-04-01 12:13:46,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 12:13:46,229 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 14 states have internal predecessors, (26), 8 states have call successors, (9), 1 states have call predecessors, (9), 5 states have return successors, (9), 5 states have call predecessors, (9), 8 states have call successors, (9) Word has length 31 [2023-04-01 12:13:46,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:13:46,230 INFO L225 Difference]: With dead ends: 45 [2023-04-01 12:13:46,230 INFO L226 Difference]: Without dead ends: 41 [2023-04-01 12:13:46,230 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 56 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2023-04-01 12:13:46,231 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 25 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:13:46,231 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 102 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:13:46,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-04-01 12:13:46,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 33. [2023-04-01 12:13:46,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 20 states have (on average 1.1) internal successors, (22), 21 states have internal predecessors, (22), 5 states have call successors, (5), 4 states have call predecessors, (5), 7 states have return successors, (8), 7 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-01 12:13:46,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2023-04-01 12:13:46,236 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 31 [2023-04-01 12:13:46,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:13:46,236 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2023-04-01 12:13:46,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 14 states have internal predecessors, (26), 8 states have call successors, (9), 1 states have call predecessors, (9), 5 states have return successors, (9), 5 states have call predecessors, (9), 8 states have call successors, (9) [2023-04-01 12:13:46,236 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2023-04-01 12:13:46,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-04-01 12:13:46,237 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:13:46,237 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:13:46,242 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-04-01 12:13:46,442 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,SelfDestructingSolverStorable3 [2023-04-01 12:13:46,442 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:13:46,443 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:13:46,443 INFO L85 PathProgramCache]: Analyzing trace with hash -89911090, now seen corresponding path program 2 times [2023-04-01 12:13:46,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:13:46,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244015923] [2023-04-01 12:13:46,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:13:46,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:13:46,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:13:46,534 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-01 12:13:46,535 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:13:46,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244015923] [2023-04-01 12:13:46,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244015923] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 12:13:46,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968824638] [2023-04-01 12:13:46,535 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 12:13:46,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 12:13:46,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 12:13:46,536 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 12:13:46,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 12:13:46,589 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-01 12:13:46,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 12:13:46,589 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-01 12:13:46,591 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 12:13:46,708 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-01 12:13:46,708 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 12:13:47,190 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-01 12:13:47,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968824638] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 12:13:47,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1297007981] [2023-04-01 12:13:47,192 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-04-01 12:13:47,192 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 12:13:47,192 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:96) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-04-01 12:13:47,193 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 12:13:47,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 13] total 21 [2023-04-01 12:13:47,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305929647] [2023-04-01 12:13:47,193 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 12:13:47,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-04-01 12:13:47,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:13:47,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-04-01 12:13:47,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2023-04-01 12:13:47,194 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 21 states, 20 states have (on average 1.8) internal successors, (36), 16 states have internal predecessors, (36), 4 states have call successors, (8), 1 states have call predecessors, (8), 11 states have return successors, (11), 11 states have call predecessors, (11), 4 states have call successors, (11) [2023-04-01 12:13:47,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:13:47,362 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2023-04-01 12:13:47,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-01 12:13:47,363 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.8) internal successors, (36), 16 states have internal predecessors, (36), 4 states have call successors, (8), 1 states have call predecessors, (8), 11 states have return successors, (11), 11 states have call predecessors, (11), 4 states have call successors, (11) Word has length 37 [2023-04-01 12:13:47,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:13:47,364 INFO L225 Difference]: With dead ends: 51 [2023-04-01 12:13:47,364 INFO L226 Difference]: Without dead ends: 47 [2023-04-01 12:13:47,364 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 56 SyntacticMatches, 11 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=112, Invalid=758, Unknown=0, NotChecked=0, Total=870 [2023-04-01 12:13:47,365 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 18 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:13:47,365 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 151 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:13:47,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-04-01 12:13:47,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 36. [2023-04-01 12:13:47,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 23 states have internal predecessors, (24), 5 states have call successors, (5), 4 states have call predecessors, (5), 8 states have return successors, (9), 8 states have call predecessors, (9), 4 states have call successors, (9) [2023-04-01 12:13:47,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2023-04-01 12:13:47,369 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 37 [2023-04-01 12:13:47,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:13:47,369 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2023-04-01 12:13:47,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.8) internal successors, (36), 16 states have internal predecessors, (36), 4 states have call successors, (8), 1 states have call predecessors, (8), 11 states have return successors, (11), 11 states have call predecessors, (11), 4 states have call successors, (11) [2023-04-01 12:13:47,369 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2023-04-01 12:13:47,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-04-01 12:13:47,370 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:13:47,370 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:13:47,375 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 12:13:47,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 12:13:47,575 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:13:47,575 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:13:47,575 INFO L85 PathProgramCache]: Analyzing trace with hash -1022291217, now seen corresponding path program 2 times [2023-04-01 12:13:47,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:13:47,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091086539] [2023-04-01 12:13:47,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:13:47,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:13:47,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-04-01 12:13:47,585 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-04-01 12:13:47,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-04-01 12:13:47,613 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-04-01 12:13:47,614 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-04-01 12:13:47,615 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location mainErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-04-01 12:13:47,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-01 12:13:47,618 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1] [2023-04-01 12:13:47,623 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-04-01 12:13:47,639 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.04 12:13:47 BoogieIcfgContainer [2023-04-01 12:13:47,639 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-04-01 12:13:47,639 INFO L158 Benchmark]: Toolchain (without parser) took 4094.87ms. Allocated memory is still 289.4MB. Free memory was 251.5MB in the beginning and 226.4MB in the end (delta: 25.1MB). Peak memory consumption was 27.4MB. Max. memory is 8.0GB. [2023-04-01 12:13:47,639 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 240.1MB. Free memory is still 189.3MB. There was no memory consumed. Max. memory is 8.0GB. [2023-04-01 12:13:47,640 INFO L158 Benchmark]: CACSL2BoogieTranslator took 148.10ms. Allocated memory is still 289.4MB. Free memory was 251.2MB in the beginning and 241.3MB in the end (delta: 9.9MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2023-04-01 12:13:47,640 INFO L158 Benchmark]: Boogie Preprocessor took 23.56ms. Allocated memory is still 289.4MB. Free memory was 241.3MB in the beginning and 240.0MB in the end (delta: 1.3MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-04-01 12:13:47,640 INFO L158 Benchmark]: RCFGBuilder took 209.40ms. Allocated memory is still 289.4MB. Free memory was 239.6MB in the beginning and 229.2MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2023-04-01 12:13:47,640 INFO L158 Benchmark]: TraceAbstraction took 3707.60ms. Allocated memory is still 289.4MB. Free memory was 228.5MB in the beginning and 226.4MB in the end (delta: 2.1MB). Peak memory consumption was 4.3MB. Max. memory is 8.0GB. [2023-04-01 12:13:47,641 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 240.1MB. Free memory is still 189.3MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 148.10ms. Allocated memory is still 289.4MB. Free memory was 251.2MB in the beginning and 241.3MB in the end (delta: 9.9MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 23.56ms. Allocated memory is still 289.4MB. Free memory was 241.3MB in the beginning and 240.0MB in the end (delta: 1.3MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 209.40ms. Allocated memory is still 289.4MB. Free memory was 239.6MB in the beginning and 229.2MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * TraceAbstraction took 3707.60ms. Allocated memory is still 289.4MB. Free memory was 228.5MB in the beginning and 226.4MB in the end (delta: 2.1MB). Peak memory consumption was 4.3MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 23]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L20] int input = 5; VAL [input=5] [L21] CALL, EXPR id(input) VAL [\old(x)=5] [L10] COND FALSE !(x==0) VAL [\old(x)=5, x=5] [L11] CALL, EXPR id2(x-1) VAL [\old(x)=4] [L15] COND FALSE !(x==0) VAL [\old(x)=4, x=4] [L16] CALL, EXPR id(x-1) VAL [\old(x)=3] [L10] COND FALSE !(x==0) VAL [\old(x)=3, x=3] [L11] CALL, EXPR id2(x-1) VAL [\old(x)=2] [L15] COND FALSE !(x==0) VAL [\old(x)=2, x=2] [L16] CALL, EXPR id(x-1) VAL [\old(x)=1] [L10] COND FALSE !(x==0) VAL [\old(x)=1, x=1] [L11] CALL, EXPR id2(x-1) VAL [\old(x)=0] [L15] COND TRUE x==0 [L15] return 0; VAL [\old(x)=0, \result=0, x=0] [L11] RET, EXPR id2(x-1) VAL [\old(x)=1, id2(x-1)=0, x=1] [L11] return id2(x-1) + 1; [L16] RET, EXPR id(x-1) VAL [\old(x)=2, id(x-1)=1, x=2] [L16] return id(x-1) + 1; [L11] RET, EXPR id2(x-1) VAL [\old(x)=3, id2(x-1)=2, x=3] [L11] return id2(x-1) + 1; [L16] RET, EXPR id(x-1) VAL [\old(x)=4, id(x-1)=3, x=4] [L16] return id(x-1) + 1; [L11] RET, EXPR id2(x-1) VAL [\old(x)=5, id2(x-1)=4, x=5] [L11] return id2(x-1) + 1; [L21] RET, EXPR id(input) VAL [id(input)=5, input=5] [L21] int result = id(input); [L22] COND TRUE result == 5 VAL [input=5, result=5] [L23] reach_error() VAL [input=5, result=5] - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 28 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 3.6s, OverallIterations: 6, TraceHistogramMax: 3, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 100 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 74 mSDsluCounter, 507 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 420 mSDsCounter, 14 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 414 IncrementalHoareTripleChecker+Invalid, 428 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 14 mSolverCounterUnsat, 87 mSDtfsCounter, 414 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 246 GetRequests, 161 SyntacticMatches, 18 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=36occurred in iteration=5, InterpolantAutomatonStates: 43, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 26 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.0s InterpolantComputationTime, 261 NumberOfCodeBlocks, 261 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 300 ConstructedInterpolants, 0 QuantifiedInterpolants, 684 SizeOfPredicates, 7 NumberOfNonLiveVariables, 306 ConjunctsInSsa, 30 ConjunctsInUnsatCore, 11 InterpolantComputations, 2 PerfectInterpolantSequences, 47/102 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2023-04-01 12:13:47,655 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...