./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-examples/standard_two_index_08.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7e1ff0e6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-examples/standard_two_index_08.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f36ecc230238464ca74f9ec244847d47641e99ef3ee219d6c3ec0ed13a7505ac --- Real Ultimate output --- This is Ultimate 0.2.2-?-7e1ff0e [2023-02-14 21:27:37,014 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-14 21:27:37,016 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-14 21:27:37,055 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-14 21:27:37,056 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-14 21:27:37,059 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-14 21:27:37,061 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-14 21:27:37,065 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-14 21:27:37,068 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-14 21:27:37,072 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-14 21:27:37,074 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-14 21:27:37,075 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-14 21:27:37,076 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-14 21:27:37,078 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-14 21:27:37,079 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-14 21:27:37,080 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-14 21:27:37,081 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-14 21:27:37,082 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-14 21:27:37,083 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-14 21:27:37,088 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-14 21:27:37,089 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-14 21:27:37,090 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-14 21:27:37,091 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-14 21:27:37,092 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-14 21:27:37,100 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-14 21:27:37,100 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-14 21:27:37,100 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-14 21:27:37,102 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-14 21:27:37,102 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-14 21:27:37,103 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-14 21:27:37,103 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-14 21:27:37,104 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-14 21:27:37,105 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-14 21:27:37,107 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-14 21:27:37,108 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-14 21:27:37,108 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-14 21:27:37,109 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-14 21:27:37,109 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-14 21:27:37,109 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-14 21:27:37,110 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-14 21:27:37,111 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-14 21:27:37,112 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-14 21:27:37,149 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-14 21:27:37,150 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-14 21:27:37,150 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-14 21:27:37,150 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-14 21:27:37,151 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-14 21:27:37,152 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-14 21:27:37,152 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-14 21:27:37,152 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-14 21:27:37,153 INFO L138 SettingsManager]: * Use SBE=true [2023-02-14 21:27:37,153 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-14 21:27:37,154 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-14 21:27:37,154 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-14 21:27:37,154 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-14 21:27:37,154 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-14 21:27:37,155 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-14 21:27:37,155 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-14 21:27:37,155 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-14 21:27:37,155 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-14 21:27:37,155 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-14 21:27:37,156 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-14 21:27:37,156 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-14 21:27:37,156 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-14 21:27:37,156 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-14 21:27:37,157 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-14 21:27:37,157 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 21:27:37,157 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-14 21:27:37,157 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-14 21:27:37,157 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-14 21:27:37,158 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-14 21:27:37,158 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-14 21:27:37,158 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-14 21:27:37,158 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-14 21:27:37,159 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-14 21:27:37,159 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-14 21:27:37,159 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-14 21:27:37,159 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f36ecc230238464ca74f9ec244847d47641e99ef3ee219d6c3ec0ed13a7505ac [2023-02-14 21:27:37,426 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-14 21:27:37,455 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-14 21:27:37,457 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-14 21:27:37,458 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-14 21:27:37,458 INFO L275 PluginConnector]: CDTParser initialized [2023-02-14 21:27:37,460 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_two_index_08.i [2023-02-14 21:27:38,564 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-14 21:27:38,734 INFO L351 CDTParser]: Found 1 translation units. [2023-02-14 21:27:38,735 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_two_index_08.i [2023-02-14 21:27:38,739 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1efff29b9/990072818d744160bf3ffdb0e2324d48/FLAG0ca4acdcc [2023-02-14 21:27:38,749 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1efff29b9/990072818d744160bf3ffdb0e2324d48 [2023-02-14 21:27:38,751 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-14 21:27:38,752 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-14 21:27:38,753 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-14 21:27:38,753 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-14 21:27:38,760 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-14 21:27:38,760 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 09:27:38" (1/1) ... [2023-02-14 21:27:38,761 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e3c6a2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:27:38, skipping insertion in model container [2023-02-14 21:27:38,761 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 09:27:38" (1/1) ... [2023-02-14 21:27:38,768 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-14 21:27:38,780 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-14 21:27:38,892 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_two_index_08.i[814,827] [2023-02-14 21:27:38,904 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 21:27:38,918 INFO L203 MainTranslator]: Completed pre-run [2023-02-14 21:27:38,930 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_two_index_08.i[814,827] [2023-02-14 21:27:38,942 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 21:27:38,958 INFO L208 MainTranslator]: Completed translation [2023-02-14 21:27:38,958 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:27:38 WrapperNode [2023-02-14 21:27:38,958 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-14 21:27:38,959 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-14 21:27:38,959 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-14 21:27:38,959 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-14 21:27:38,963 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:27:38" (1/1) ... [2023-02-14 21:27:38,968 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:27:38" (1/1) ... [2023-02-14 21:27:38,981 INFO L138 Inliner]: procedures = 16, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 59 [2023-02-14 21:27:38,981 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-14 21:27:38,982 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-14 21:27:38,982 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-14 21:27:38,982 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-14 21:27:38,988 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:27:38" (1/1) ... [2023-02-14 21:27:38,989 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:27:38" (1/1) ... [2023-02-14 21:27:38,990 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:27:38" (1/1) ... [2023-02-14 21:27:38,990 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:27:38" (1/1) ... [2023-02-14 21:27:38,994 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:27:38" (1/1) ... [2023-02-14 21:27:38,997 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:27:38" (1/1) ... [2023-02-14 21:27:38,997 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:27:38" (1/1) ... [2023-02-14 21:27:38,998 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:27:38" (1/1) ... [2023-02-14 21:27:38,999 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-14 21:27:39,000 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-14 21:27:39,000 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-14 21:27:39,000 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-14 21:27:39,001 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:27:38" (1/1) ... [2023-02-14 21:27:39,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 21:27:39,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 21:27:39,024 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) [2023-02-14 21:27:39,026 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 [2023-02-14 21:27:39,055 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-14 21:27:39,055 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-14 21:27:39,055 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-14 21:27:39,055 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-14 21:27:39,056 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-14 21:27:39,056 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-14 21:27:39,056 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-14 21:27:39,056 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-14 21:27:39,106 INFO L235 CfgBuilder]: Building ICFG [2023-02-14 21:27:39,107 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-14 21:27:39,199 INFO L276 CfgBuilder]: Performing block encoding [2023-02-14 21:27:39,204 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-14 21:27:39,205 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2023-02-14 21:27:39,206 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 09:27:39 BoogieIcfgContainer [2023-02-14 21:27:39,206 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-14 21:27:39,208 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-14 21:27:39,208 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-14 21:27:39,211 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-14 21:27:39,211 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.02 09:27:38" (1/3) ... [2023-02-14 21:27:39,212 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ed4d27c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 09:27:39, skipping insertion in model container [2023-02-14 21:27:39,212 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:27:38" (2/3) ... [2023-02-14 21:27:39,213 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ed4d27c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 09:27:39, skipping insertion in model container [2023-02-14 21:27:39,213 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 09:27:39" (3/3) ... [2023-02-14 21:27:39,214 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_two_index_08.i [2023-02-14 21:27:39,229 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-14 21:27:39,229 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-14 21:27:39,264 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-14 21:27:39,269 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=PETRI_NET, 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;@617ecb0d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-14 21:27:39,269 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-14 21:27:39,273 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 21:27:39,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-02-14 21:27:39,278 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 21:27:39,279 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 21:27:39,279 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 21:27:39,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 21:27:39,283 INFO L85 PathProgramCache]: Analyzing trace with hash -1157635880, now seen corresponding path program 1 times [2023-02-14 21:27:39,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 21:27:39,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795463144] [2023-02-14 21:27:39,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 21:27:39,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 21:27:39,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 21:27:39,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 21:27:39,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 21:27:39,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795463144] [2023-02-14 21:27:39,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795463144] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 21:27:39,516 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 21:27:39,516 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-14 21:27:39,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678072969] [2023-02-14 21:27:39,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 21:27:39,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-14 21:27:39,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 21:27:39,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-14 21:27:39,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-14 21:27:39,569 INFO L87 Difference]: Start difference. First operand has 15 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 21:27:39,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 21:27:39,616 INFO L93 Difference]: Finished difference Result 28 states and 40 transitions. [2023-02-14 21:27:39,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-14 21:27:39,622 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-02-14 21:27:39,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 21:27:39,628 INFO L225 Difference]: With dead ends: 28 [2023-02-14 21:27:39,628 INFO L226 Difference]: Without dead ends: 12 [2023-02-14 21:27:39,631 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 [2023-02-14 21:27:39,650 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 21:27:39,651 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 21:27:39,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2023-02-14 21:27:39,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2023-02-14 21:27:39,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 21:27:39,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2023-02-14 21:27:39,692 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 9 [2023-02-14 21:27:39,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 21:27:39,698 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2023-02-14 21:27:39,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 21:27:39,699 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2023-02-14 21:27:39,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-14 21:27:39,699 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 21:27:39,700 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 21:27:39,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-14 21:27:39,700 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 21:27:39,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 21:27:39,701 INFO L85 PathProgramCache]: Analyzing trace with hash 722375763, now seen corresponding path program 1 times [2023-02-14 21:27:39,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 21:27:39,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746236364] [2023-02-14 21:27:39,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 21:27:39,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 21:27:39,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 21:27:39,815 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 21:27:39,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 21:27:39,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746236364] [2023-02-14 21:27:39,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746236364] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 21:27:39,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682817847] [2023-02-14 21:27:39,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 21:27:39,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 21:27:39,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 21:27:39,820 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) [2023-02-14 21:27:39,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-14 21:27:39,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 21:27:39,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 2 conjunts are in the unsatisfiable core [2023-02-14 21:27:39,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 21:27:39,911 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-14 21:27:39,911 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 21:27:39,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682817847] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 21:27:39,912 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-14 21:27:39,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2023-02-14 21:27:39,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444800904] [2023-02-14 21:27:39,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 21:27:39,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-14 21:27:39,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 21:27:39,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-14 21:27:39,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-14 21:27:39,917 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 21:27:39,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 21:27:39,948 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2023-02-14 21:27:39,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-14 21:27:39,949 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-02-14 21:27:39,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 21:27:39,949 INFO L225 Difference]: With dead ends: 24 [2023-02-14 21:27:39,949 INFO L226 Difference]: Without dead ends: 18 [2023-02-14 21:27:39,950 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-14 21:27:39,951 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 4 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 21:27:39,952 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 13 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 21:27:39,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-02-14 21:27:39,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 13. [2023-02-14 21:27:39,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 21:27:39,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2023-02-14 21:27:39,956 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 10 [2023-02-14 21:27:39,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 21:27:39,956 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2023-02-14 21:27:39,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 21:27:39,957 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2023-02-14 21:27:39,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-02-14 21:27:39,957 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 21:27:39,957 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 21:27:39,967 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-14 21:27:40,164 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 [2023-02-14 21:27:40,165 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 21:27:40,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 21:27:40,166 INFO L85 PathProgramCache]: Analyzing trace with hash 970258327, now seen corresponding path program 1 times [2023-02-14 21:27:40,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 21:27:40,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834814144] [2023-02-14 21:27:40,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 21:27:40,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 21:27:40,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 21:27:40,283 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-14 21:27:40,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 21:27:40,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834814144] [2023-02-14 21:27:40,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834814144] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 21:27:40,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163261775] [2023-02-14 21:27:40,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 21:27:40,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 21:27:40,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 21:27:40,286 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) [2023-02-14 21:27:40,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-14 21:27:40,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 21:27:40,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-14 21:27:40,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 21:27:40,364 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-14 21:27:40,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 21:27:40,394 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-14 21:27:40,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163261775] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 21:27:40,396 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 21:27:40,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-02-14 21:27:40,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633200744] [2023-02-14 21:27:40,398 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 21:27:40,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-14 21:27:40,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 21:27:40,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-14 21:27:40,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-02-14 21:27:40,401 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 21:27:40,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 21:27:40,453 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2023-02-14 21:27:40,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-14 21:27:40,455 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-02-14 21:27:40,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 21:27:40,456 INFO L225 Difference]: With dead ends: 36 [2023-02-14 21:27:40,456 INFO L226 Difference]: Without dead ends: 27 [2023-02-14 21:27:40,457 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-02-14 21:27:40,458 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 11 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 21:27:40,460 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 24 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 21:27:40,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-02-14 21:27:40,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 17. [2023-02-14 21:27:40,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 21:27:40,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2023-02-14 21:27:40,470 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 11 [2023-02-14 21:27:40,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 21:27:40,470 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2023-02-14 21:27:40,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 21:27:40,471 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2023-02-14 21:27:40,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-02-14 21:27:40,472 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 21:27:40,472 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 21:27:40,481 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-14 21:27:40,674 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 [2023-02-14 21:27:40,675 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 21:27:40,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 21:27:40,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1963781416, now seen corresponding path program 2 times [2023-02-14 21:27:40,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 21:27:40,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596905002] [2023-02-14 21:27:40,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 21:27:40,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 21:27:40,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 21:27:40,818 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-14 21:27:40,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 21:27:40,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596905002] [2023-02-14 21:27:40,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596905002] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 21:27:40,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896596191] [2023-02-14 21:27:40,822 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 21:27:40,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 21:27:40,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 21:27:40,825 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) [2023-02-14 21:27:40,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-14 21:27:40,902 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 21:27:40,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 21:27:40,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-14 21:27:40,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 21:27:40,962 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-14 21:27:40,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 21:27:41,019 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-14 21:27:41,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896596191] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 21:27:41,020 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 21:27:41,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 15 [2023-02-14 21:27:41,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550424274] [2023-02-14 21:27:41,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 21:27:41,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-14 21:27:41,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 21:27:41,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-14 21:27:41,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=106, Unknown=0, NotChecked=0, Total=210 [2023-02-14 21:27:41,025 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 21:27:41,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 21:27:41,103 INFO L93 Difference]: Finished difference Result 57 states and 70 transitions. [2023-02-14 21:27:41,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-14 21:27:41,103 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-02-14 21:27:41,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 21:27:41,106 INFO L225 Difference]: With dead ends: 57 [2023-02-14 21:27:41,106 INFO L226 Difference]: Without dead ends: 47 [2023-02-14 21:27:41,107 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=106, Unknown=0, NotChecked=0, Total=210 [2023-02-14 21:27:41,110 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 27 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 21:27:41,118 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 41 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 21:27:41,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-02-14 21:27:41,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 27. [2023-02-14 21:27:41,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 21:27:41,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2023-02-14 21:27:41,131 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 15 [2023-02-14 21:27:41,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 21:27:41,137 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2023-02-14 21:27:41,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 21:27:41,137 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2023-02-14 21:27:41,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-14 21:27:41,138 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 21:27:41,138 INFO L195 NwaCegarLoop]: trace histogram [12, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 21:27:41,143 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-14 21:27:41,339 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 [2023-02-14 21:27:41,339 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 21:27:41,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 21:27:41,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1448090520, now seen corresponding path program 3 times [2023-02-14 21:27:41,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 21:27:41,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735520580] [2023-02-14 21:27:41,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 21:27:41,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 21:27:41,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 21:27:41,530 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2023-02-14 21:27:41,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 21:27:41,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735520580] [2023-02-14 21:27:41,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735520580] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 21:27:41,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598133486] [2023-02-14 21:27:41,531 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-14 21:27:41,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 21:27:41,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 21:27:41,532 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) [2023-02-14 21:27:41,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-14 21:27:41,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-14 21:27:41,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 21:27:41,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-14 21:27:41,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 21:27:41,617 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2023-02-14 21:27:41,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 21:27:41,664 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2023-02-14 21:27:41,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598133486] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 21:27:41,664 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 21:27:41,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-02-14 21:27:41,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662940628] [2023-02-14 21:27:41,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 21:27:41,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-14 21:27:41,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 21:27:41,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-14 21:27:41,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-02-14 21:27:41,667 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 21:27:41,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 21:27:41,731 INFO L93 Difference]: Finished difference Result 85 states and 93 transitions. [2023-02-14 21:27:41,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-14 21:27:41,732 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2023-02-14 21:27:41,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 21:27:41,733 INFO L225 Difference]: With dead ends: 85 [2023-02-14 21:27:41,733 INFO L226 Difference]: Without dead ends: 79 [2023-02-14 21:27:41,734 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-02-14 21:27:41,734 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 84 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 21:27:41,735 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 41 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 21:27:41,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2023-02-14 21:27:41,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 33. [2023-02-14 21:27:41,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.09375) internal successors, (35), 32 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 21:27:41,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2023-02-14 21:27:41,744 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 25 [2023-02-14 21:27:41,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 21:27:41,745 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2023-02-14 21:27:41,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 21:27:41,745 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2023-02-14 21:27:41,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-02-14 21:27:41,746 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 21:27:41,746 INFO L195 NwaCegarLoop]: trace histogram [12, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 21:27:41,754 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-14 21:27:41,952 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 [2023-02-14 21:27:41,952 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 21:27:41,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 21:27:41,953 INFO L85 PathProgramCache]: Analyzing trace with hash -798905000, now seen corresponding path program 4 times [2023-02-14 21:27:41,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 21:27:41,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925485495] [2023-02-14 21:27:41,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 21:27:41,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 21:27:41,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 21:27:42,204 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2023-02-14 21:27:42,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 21:27:42,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925485495] [2023-02-14 21:27:42,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925485495] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 21:27:42,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594825772] [2023-02-14 21:27:42,205 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-14 21:27:42,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 21:27:42,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 21:27:42,207 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) [2023-02-14 21:27:42,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-14 21:27:42,313 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-14 21:27:42,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 21:27:42,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-14 21:27:42,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 21:27:42,435 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-02-14 21:27:42,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 21:27:42,687 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-02-14 21:27:42,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594825772] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 21:27:42,687 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 21:27:42,687 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 15] total 38 [2023-02-14 21:27:42,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956535147] [2023-02-14 21:27:42,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 21:27:42,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-02-14 21:27:42,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 21:27:42,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-02-14 21:27:42,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=702, Invalid=704, Unknown=0, NotChecked=0, Total=1406 [2023-02-14 21:27:42,693 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 38 states, 38 states have (on average 1.3421052631578947) internal successors, (51), 38 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 21:27:42,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 21:27:42,851 INFO L93 Difference]: Finished difference Result 142 states and 171 transitions. [2023-02-14 21:27:42,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-02-14 21:27:42,851 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.3421052631578947) internal successors, (51), 38 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2023-02-14 21:27:42,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 21:27:42,855 INFO L225 Difference]: With dead ends: 142 [2023-02-14 21:27:42,855 INFO L226 Difference]: Without dead ends: 124 [2023-02-14 21:27:42,857 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 577 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=702, Invalid=704, Unknown=0, NotChecked=0, Total=1406 [2023-02-14 21:27:42,857 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 171 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 21:27:42,858 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 78 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 21:27:42,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2023-02-14 21:27:42,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 59. [2023-02-14 21:27:42,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.0517241379310345) internal successors, (61), 58 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 21:27:42,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2023-02-14 21:27:42,875 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 31 [2023-02-14 21:27:42,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 21:27:42,876 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2023-02-14 21:27:42,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.3421052631578947) internal successors, (51), 38 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 21:27:42,876 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2023-02-14 21:27:42,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-02-14 21:27:42,878 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 21:27:42,879 INFO L195 NwaCegarLoop]: trace histogram [35, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 21:27:42,887 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-14 21:27:43,085 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 [2023-02-14 21:27:43,085 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 21:27:43,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 21:27:43,086 INFO L85 PathProgramCache]: Analyzing trace with hash 1918403063, now seen corresponding path program 5 times [2023-02-14 21:27:43,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 21:27:43,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326445265] [2023-02-14 21:27:43,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 21:27:43,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 21:27:43,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 21:27:43,507 INFO L134 CoverageAnalysis]: Checked inductivity of 721 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2023-02-14 21:27:43,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 21:27:43,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326445265] [2023-02-14 21:27:43,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326445265] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 21:27:43,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620608013] [2023-02-14 21:27:43,508 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-14 21:27:43,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 21:27:43,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 21:27:43,509 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) [2023-02-14 21:27:43,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-14 21:28:33,656 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2023-02-14 21:28:33,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 21:28:33,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 37 conjunts are in the unsatisfiable core [2023-02-14 21:28:33,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 21:28:33,986 INFO L134 CoverageAnalysis]: Checked inductivity of 721 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2023-02-14 21:28:33,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 21:28:34,933 INFO L134 CoverageAnalysis]: Checked inductivity of 721 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2023-02-14 21:28:34,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620608013] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 21:28:34,933 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 21:28:34,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 38, 38] total 84 [2023-02-14 21:28:34,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650870750] [2023-02-14 21:28:34,934 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 21:28:34,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2023-02-14 21:28:34,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 21:28:34,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2023-02-14 21:28:34,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3485, Invalid=3487, Unknown=0, NotChecked=0, Total=6972 [2023-02-14 21:28:34,938 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand has 84 states, 84 states have (on average 1.1904761904761905) internal successors, (100), 84 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 21:28:35,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 21:28:35,266 INFO L93 Difference]: Finished difference Result 227 states and 282 transitions. [2023-02-14 21:28:35,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2023-02-14 21:28:35,266 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 1.1904761904761905) internal successors, (100), 84 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2023-02-14 21:28:35,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 21:28:35,267 INFO L225 Difference]: With dead ends: 227 [2023-02-14 21:28:35,268 INFO L226 Difference]: Without dead ends: 206 [2023-02-14 21:28:35,270 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3765 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=3485, Invalid=3487, Unknown=0, NotChecked=0, Total=6972 [2023-02-14 21:28:35,270 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 411 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 411 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-14 21:28:35,271 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [411 Valid, 109 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-14 21:28:35,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2023-02-14 21:28:35,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 111. [2023-02-14 21:28:35,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.0272727272727273) internal successors, (113), 110 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 21:28:35,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 113 transitions. [2023-02-14 21:28:35,279 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 113 transitions. Word has length 57 [2023-02-14 21:28:35,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 21:28:35,279 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 113 transitions. [2023-02-14 21:28:35,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 1.1904761904761905) internal successors, (100), 84 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 21:28:35,280 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 113 transitions. [2023-02-14 21:28:35,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2023-02-14 21:28:35,281 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 21:28:35,281 INFO L195 NwaCegarLoop]: trace histogram [81, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 21:28:35,303 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-14 21:28:35,482 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 [2023-02-14 21:28:35,482 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 21:28:35,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 21:28:35,483 INFO L85 PathProgramCache]: Analyzing trace with hash -217898473, now seen corresponding path program 6 times [2023-02-14 21:28:35,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 21:28:35,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233265472] [2023-02-14 21:28:35,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 21:28:35,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 21:28:35,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 21:28:36,337 INFO L134 CoverageAnalysis]: Checked inductivity of 3511 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 3321 trivial. 0 not checked. [2023-02-14 21:28:36,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 21:28:36,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233265472] [2023-02-14 21:28:36,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233265472] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 21:28:36,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756271034] [2023-02-14 21:28:36,338 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-14 21:28:36,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 21:28:36,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 21:28:36,340 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) [2023-02-14 21:28:36,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process