./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-examples/standard_partition_ground-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 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_partition_ground-2.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 fcf72d109deb69f1acda4466c7376bd6c362d474983f8a50a2faed8c0a192a76 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-20 20:45:10,986 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-20 20:45:10,988 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-20 20:45:11,010 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-20 20:45:11,015 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-20 20:45:11,016 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-20 20:45:11,020 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-20 20:45:11,024 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-20 20:45:11,025 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-20 20:45:11,026 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-20 20:45:11,027 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-20 20:45:11,029 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-20 20:45:11,030 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-20 20:45:11,033 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-20 20:45:11,033 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-20 20:45:11,035 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-20 20:45:11,036 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-20 20:45:11,041 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-20 20:45:11,043 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-20 20:45:11,046 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-20 20:45:11,049 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-20 20:45:11,050 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-20 20:45:11,051 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-20 20:45:11,052 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-20 20:45:11,053 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-20 20:45:11,055 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-20 20:45:11,056 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-20 20:45:11,057 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-20 20:45:11,058 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-20 20:45:11,058 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-20 20:45:11,059 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-20 20:45:11,059 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-20 20:45:11,060 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-20 20:45:11,061 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-20 20:45:11,061 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-20 20:45:11,062 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-20 20:45:11,062 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-20 20:45:11,063 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-20 20:45:11,063 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-20 20:45:11,063 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-20 20:45:11,064 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-20 20:45:11,066 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-20 20:45:11,067 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-20 20:45:11,093 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-20 20:45:11,094 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-20 20:45:11,094 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-20 20:45:11,094 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-20 20:45:11,095 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-20 20:45:11,095 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-20 20:45:11,095 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-20 20:45:11,096 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-20 20:45:11,096 INFO L138 SettingsManager]: * Use SBE=true [2022-07-20 20:45:11,096 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-20 20:45:11,097 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-20 20:45:11,097 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-20 20:45:11,097 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-20 20:45:11,097 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-20 20:45:11,097 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-20 20:45:11,097 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-20 20:45:11,097 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-20 20:45:11,098 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-20 20:45:11,098 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-20 20:45:11,099 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-20 20:45:11,099 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-20 20:45:11,099 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-20 20:45:11,099 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-20 20:45:11,099 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-20 20:45:11,099 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 20:45:11,100 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-20 20:45:11,100 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-20 20:45:11,100 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-20 20:45:11,100 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-20 20:45:11,100 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-20 20:45:11,101 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-20 20:45:11,101 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-20 20:45:11,101 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-20 20:45:11,101 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fcf72d109deb69f1acda4466c7376bd6c362d474983f8a50a2faed8c0a192a76 [2022-07-20 20:45:11,325 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-20 20:45:11,352 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-20 20:45:11,354 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-20 20:45:11,354 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-20 20:45:11,355 INFO L275 PluginConnector]: CDTParser initialized [2022-07-20 20:45:11,356 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_partition_ground-2.i [2022-07-20 20:45:11,405 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4cf4665d9/cfe1d0b94fb2460cb3f5d97c21b024dd/FLAGece8d39f5 [2022-07-20 20:45:11,771 INFO L306 CDTParser]: Found 1 translation units. [2022-07-20 20:45:11,771 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_partition_ground-2.i [2022-07-20 20:45:11,777 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4cf4665d9/cfe1d0b94fb2460cb3f5d97c21b024dd/FLAGece8d39f5 [2022-07-20 20:45:11,792 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4cf4665d9/cfe1d0b94fb2460cb3f5d97c21b024dd [2022-07-20 20:45:11,794 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-20 20:45:11,795 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-20 20:45:11,810 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-20 20:45:11,810 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-20 20:45:11,820 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-20 20:45:11,821 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 08:45:11" (1/1) ... [2022-07-20 20:45:11,821 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@312a41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 08:45:11, skipping insertion in model container [2022-07-20 20:45:11,822 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 08:45:11" (1/1) ... [2022-07-20 20:45:11,828 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-20 20:45:11,840 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-20 20:45:11,921 WARN L230 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_partition_ground-2.i[820,833] [2022-07-20 20:45:11,949 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 20:45:11,956 INFO L203 MainTranslator]: Completed pre-run [2022-07-20 20:45:11,967 WARN L230 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_partition_ground-2.i[820,833] [2022-07-20 20:45:11,984 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 20:45:11,995 INFO L208 MainTranslator]: Completed translation [2022-07-20 20:45:11,996 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 08:45:11 WrapperNode [2022-07-20 20:45:11,996 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-20 20:45:11,997 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-20 20:45:11,997 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-20 20:45:11,997 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-20 20:45:12,002 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 08:45:11" (1/1) ... [2022-07-20 20:45:12,007 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 08:45:11" (1/1) ... [2022-07-20 20:45:12,024 INFO L137 Inliner]: procedures = 16, calls = 20, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 80 [2022-07-20 20:45:12,025 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-20 20:45:12,025 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-20 20:45:12,025 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-20 20:45:12,026 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-20 20:45:12,031 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 08:45:11" (1/1) ... [2022-07-20 20:45:12,031 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 08:45:11" (1/1) ... [2022-07-20 20:45:12,040 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 08:45:11" (1/1) ... [2022-07-20 20:45:12,041 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 08:45:11" (1/1) ... [2022-07-20 20:45:12,050 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 08:45:11" (1/1) ... [2022-07-20 20:45:12,055 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 08:45:11" (1/1) ... [2022-07-20 20:45:12,061 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 08:45:11" (1/1) ... [2022-07-20 20:45:12,063 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-20 20:45:12,068 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-20 20:45:12,068 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-20 20:45:12,068 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-20 20:45:12,069 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 08:45:11" (1/1) ... [2022-07-20 20:45:12,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 20:45:12,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 20:45:12,093 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) [2022-07-20 20:45:12,112 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 [2022-07-20 20:45:12,122 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-20 20:45:12,123 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-20 20:45:12,123 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-20 20:45:12,123 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-20 20:45:12,123 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-20 20:45:12,123 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-20 20:45:12,123 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-20 20:45:12,124 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-20 20:45:12,175 INFO L234 CfgBuilder]: Building ICFG [2022-07-20 20:45:12,176 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-20 20:45:12,333 INFO L275 CfgBuilder]: Performing block encoding [2022-07-20 20:45:12,341 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-20 20:45:12,352 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-07-20 20:45:12,354 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 08:45:12 BoogieIcfgContainer [2022-07-20 20:45:12,354 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-20 20:45:12,356 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-20 20:45:12,356 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-20 20:45:12,358 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-20 20:45:12,358 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 08:45:11" (1/3) ... [2022-07-20 20:45:12,359 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e5cc206 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 08:45:12, skipping insertion in model container [2022-07-20 20:45:12,359 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 08:45:11" (2/3) ... [2022-07-20 20:45:12,359 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e5cc206 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 08:45:12, skipping insertion in model container [2022-07-20 20:45:12,360 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 08:45:12" (3/3) ... [2022-07-20 20:45:12,361 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_partition_ground-2.i [2022-07-20 20:45:12,380 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-20 20:45:12,385 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-20 20:45:12,436 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-20 20:45:12,444 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@518d63c5, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@dce46c8 [2022-07-20 20:45:12,444 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-20 20:45:12,455 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 20 states have (on average 1.6) internal successors, (32), 21 states have internal predecessors, (32), 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) [2022-07-20 20:45:12,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-20 20:45:12,478 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 20:45:12,478 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 20:45:12,479 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 20:45:12,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 20:45:12,489 INFO L85 PathProgramCache]: Analyzing trace with hash -700880873, now seen corresponding path program 1 times [2022-07-20 20:45:12,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 20:45:12,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601019727] [2022-07-20 20:45:12,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:45:12,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 20:45:12,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:45:12,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 20:45:12,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 20:45:12,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601019727] [2022-07-20 20:45:12,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601019727] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 20:45:12,645 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 20:45:12,645 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 20:45:12,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559033404] [2022-07-20 20:45:12,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 20:45:12,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 20:45:12,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 20:45:12,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 20:45:12,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 20:45:12,676 INFO L87 Difference]: Start difference. First operand has 22 states, 20 states have (on average 1.6) internal successors, (32), 21 states have internal predecessors, (32), 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 3.3333333333333335) 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) [2022-07-20 20:45:12,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 20:45:12,709 INFO L93 Difference]: Finished difference Result 42 states and 62 transitions. [2022-07-20 20:45:12,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 20:45:12,712 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 [2022-07-20 20:45:12,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 20:45:12,718 INFO L225 Difference]: With dead ends: 42 [2022-07-20 20:45:12,718 INFO L226 Difference]: Without dead ends: 20 [2022-07-20 20:45:12,723 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 [2022-07-20 20:45:12,727 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 1 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 20:45:12,729 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 48 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 20:45:12,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-07-20 20:45:12,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2022-07-20 20:45:12,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 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) [2022-07-20 20:45:12,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2022-07-20 20:45:12,757 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 10 [2022-07-20 20:45:12,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 20:45:12,757 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2022-07-20 20:45:12,758 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) [2022-07-20 20:45:12,758 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2022-07-20 20:45:12,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-20 20:45:12,759 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 20:45:12,759 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 20:45:12,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-20 20:45:12,760 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 20:45:12,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 20:45:12,761 INFO L85 PathProgramCache]: Analyzing trace with hash 1756124227, now seen corresponding path program 1 times [2022-07-20 20:45:12,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 20:45:12,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907678428] [2022-07-20 20:45:12,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:45:12,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 20:45:12,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:45:12,813 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 20:45:12,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 20:45:12,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907678428] [2022-07-20 20:45:12,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907678428] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 20:45:12,814 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 20:45:12,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 20:45:12,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500526379] [2022-07-20 20:45:12,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 20:45:12,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 20:45:12,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 20:45:12,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 20:45:12,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 20:45:12,818 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2022-07-20 20:45:12,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 20:45:12,853 INFO L93 Difference]: Finished difference Result 36 states and 47 transitions. [2022-07-20 20:45:12,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 20:45:12,854 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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 12 [2022-07-20 20:45:12,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 20:45:12,855 INFO L225 Difference]: With dead ends: 36 [2022-07-20 20:45:12,856 INFO L226 Difference]: Without dead ends: 25 [2022-07-20 20:45:12,856 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 [2022-07-20 20:45:12,858 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 6 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 20:45:12,859 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 27 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 20:45:12,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-07-20 20:45:12,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 21. [2022-07-20 20:45:12,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.3) internal successors, (26), 20 states have internal predecessors, (26), 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) [2022-07-20 20:45:12,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2022-07-20 20:45:12,864 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 12 [2022-07-20 20:45:12,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 20:45:12,865 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2022-07-20 20:45:12,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2022-07-20 20:45:12,867 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2022-07-20 20:45:12,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-20 20:45:12,868 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 20:45:12,868 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 20:45:12,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-20 20:45:12,869 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 20:45:12,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 20:45:12,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1655857333, now seen corresponding path program 1 times [2022-07-20 20:45:12,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 20:45:12,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012426179] [2022-07-20 20:45:12,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:45:12,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 20:45:12,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:45:12,926 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-20 20:45:12,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 20:45:12,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012426179] [2022-07-20 20:45:12,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012426179] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 20:45:12,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674405329] [2022-07-20 20:45:12,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:45:12,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:45:12,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 20:45:12,930 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) [2022-07-20 20:45:12,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-20 20:45:13,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:45:13,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-20 20:45:13,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 20:45:13,038 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-20 20:45:13,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 20:45:13,066 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-20 20:45:13,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674405329] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 20:45:13,067 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 20:45:13,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-07-20 20:45:13,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967219530] [2022-07-20 20:45:13,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 20:45:13,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-20 20:45:13,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 20:45:13,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-20 20:45:13,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-07-20 20:45:13,069 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 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) [2022-07-20 20:45:13,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 20:45:13,109 INFO L93 Difference]: Finished difference Result 43 states and 55 transitions. [2022-07-20 20:45:13,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-20 20:45:13,110 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 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 18 [2022-07-20 20:45:13,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 20:45:13,118 INFO L225 Difference]: With dead ends: 43 [2022-07-20 20:45:13,118 INFO L226 Difference]: Without dead ends: 27 [2022-07-20 20:45:13,119 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-07-20 20:45:13,120 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 6 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 20:45:13,120 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 59 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 20:45:13,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-07-20 20:45:13,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-07-20 20:45:13,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 26 states have internal predecessors, (32), 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) [2022-07-20 20:45:13,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2022-07-20 20:45:13,124 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 18 [2022-07-20 20:45:13,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 20:45:13,124 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2022-07-20 20:45:13,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 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) [2022-07-20 20:45:13,124 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2022-07-20 20:45:13,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-20 20:45:13,125 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 20:45:13,125 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 20:45:13,144 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-20 20:45:13,326 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 [2022-07-20 20:45:13,326 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 20:45:13,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 20:45:13,327 INFO L85 PathProgramCache]: Analyzing trace with hash 1161822033, now seen corresponding path program 2 times [2022-07-20 20:45:13,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 20:45:13,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652305001] [2022-07-20 20:45:13,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:45:13,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 20:45:13,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:45:13,370 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-20 20:45:13,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 20:45:13,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652305001] [2022-07-20 20:45:13,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652305001] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 20:45:13,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739700199] [2022-07-20 20:45:13,376 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 20:45:13,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:45:13,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 20:45:13,378 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) [2022-07-20 20:45:13,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-20 20:45:13,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 20:45:13,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 20:45:13,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-20 20:45:13,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 20:45:13,476 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-20 20:45:13,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 20:45:13,547 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-20 20:45:13,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739700199] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 20:45:13,548 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 20:45:13,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2022-07-20 20:45:13,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673894672] [2022-07-20 20:45:13,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 20:45:13,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-20 20:45:13,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 20:45:13,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-20 20:45:13,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-07-20 20:45:13,552 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 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) [2022-07-20 20:45:13,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 20:45:13,732 INFO L93 Difference]: Finished difference Result 65 states and 86 transitions. [2022-07-20 20:45:13,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-20 20:45:13,733 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 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 24 [2022-07-20 20:45:13,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 20:45:13,737 INFO L225 Difference]: With dead ends: 65 [2022-07-20 20:45:13,738 INFO L226 Difference]: Without dead ends: 49 [2022-07-20 20:45:13,739 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=211, Invalid=341, Unknown=0, NotChecked=0, Total=552 [2022-07-20 20:45:13,743 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 39 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 20:45:13,745 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 87 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 20:45:13,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-07-20 20:45:13,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2022-07-20 20:45:13,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.1818181818181819) internal successors, (52), 44 states have internal predecessors, (52), 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) [2022-07-20 20:45:13,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions. [2022-07-20 20:45:13,754 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 24 [2022-07-20 20:45:13,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 20:45:13,754 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 52 transitions. [2022-07-20 20:45:13,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 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) [2022-07-20 20:45:13,755 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2022-07-20 20:45:13,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-20 20:45:13,755 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 20:45:13,755 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 20:45:13,773 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-20 20:45:13,960 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 [2022-07-20 20:45:13,961 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 20:45:13,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 20:45:13,962 INFO L85 PathProgramCache]: Analyzing trace with hash 194818197, now seen corresponding path program 3 times [2022-07-20 20:45:13,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 20:45:13,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510089101] [2022-07-20 20:45:13,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:45:13,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 20:45:14,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:45:14,096 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-20 20:45:14,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 20:45:14,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510089101] [2022-07-20 20:45:14,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510089101] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 20:45:14,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932809826] [2022-07-20 20:45:14,097 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 20:45:14,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:45:14,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 20:45:14,098 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) [2022-07-20 20:45:14,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-20 20:45:14,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-20 20:45:14,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 20:45:14,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-20 20:45:14,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 20:45:14,207 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-07-20 20:45:14,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 20:45:14,255 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-07-20 20:45:14,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932809826] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 20:45:14,255 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 20:45:14,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5, 5] total 19 [2022-07-20 20:45:14,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413933228] [2022-07-20 20:45:14,256 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 20:45:14,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-20 20:45:14,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 20:45:14,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-20 20:45:14,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2022-07-20 20:45:14,257 INFO L87 Difference]: Start difference. First operand 45 states and 52 transitions. Second operand has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 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) [2022-07-20 20:45:14,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 20:45:14,425 INFO L93 Difference]: Finished difference Result 94 states and 124 transitions. [2022-07-20 20:45:14,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-20 20:45:14,426 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 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 42 [2022-07-20 20:45:14,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 20:45:14,427 INFO L225 Difference]: With dead ends: 94 [2022-07-20 20:45:14,427 INFO L226 Difference]: Without dead ends: 72 [2022-07-20 20:45:14,428 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=314, Invalid=556, Unknown=0, NotChecked=0, Total=870 [2022-07-20 20:45:14,428 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 117 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 20:45:14,429 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 72 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 20:45:14,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-07-20 20:45:14,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2022-07-20 20:45:14,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.2285714285714286) internal successors, (86), 70 states have internal predecessors, (86), 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) [2022-07-20 20:45:14,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 86 transitions. [2022-07-20 20:45:14,434 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 86 transitions. Word has length 42 [2022-07-20 20:45:14,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 20:45:14,434 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 86 transitions. [2022-07-20 20:45:14,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 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) [2022-07-20 20:45:14,434 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 86 transitions. [2022-07-20 20:45:14,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-07-20 20:45:14,452 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 20:45:14,452 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 20:45:14,472 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-20 20:45:14,652 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 [2022-07-20 20:45:14,653 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 20:45:14,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 20:45:14,653 INFO L85 PathProgramCache]: Analyzing trace with hash 515904919, now seen corresponding path program 4 times [2022-07-20 20:45:14,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 20:45:14,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811108190] [2022-07-20 20:45:14,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:45:14,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 20:45:14,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:45:14,805 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-07-20 20:45:14,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 20:45:14,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811108190] [2022-07-20 20:45:14,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811108190] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 20:45:14,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559696134] [2022-07-20 20:45:14,806 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 20:45:14,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:45:14,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 20:45:14,807 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) [2022-07-20 20:45:14,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-20 20:45:14,911 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 20:45:14,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 20:45:14,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-20 20:45:14,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 20:45:14,972 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-07-20 20:45:14,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 20:45:15,169 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-07-20 20:45:15,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559696134] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 20:45:15,169 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 20:45:15,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 27 [2022-07-20 20:45:15,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781573660] [2022-07-20 20:45:15,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 20:45:15,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-20 20:45:15,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 20:45:15,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-20 20:45:15,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2022-07-20 20:45:15,171 INFO L87 Difference]: Start difference. First operand 71 states and 86 transitions. Second operand has 27 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 27 states have internal predecessors, (65), 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) [2022-07-20 20:45:15,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 20:45:15,226 INFO L93 Difference]: Finished difference Result 143 states and 185 transitions. [2022-07-20 20:45:15,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-20 20:45:15,245 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 27 states have internal predecessors, (65), 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 68 [2022-07-20 20:45:15,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 20:45:15,248 INFO L225 Difference]: With dead ends: 143 [2022-07-20 20:45:15,248 INFO L226 Difference]: Without dead ends: 97 [2022-07-20 20:45:15,249 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2022-07-20 20:45:15,250 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 36 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 20:45:15,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 78 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 20:45:15,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-07-20 20:45:15,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2022-07-20 20:45:15,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.1666666666666667) internal successors, (112), 96 states have internal predecessors, (112), 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) [2022-07-20 20:45:15,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 112 transitions. [2022-07-20 20:45:15,266 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 112 transitions. Word has length 68 [2022-07-20 20:45:15,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 20:45:15,267 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 112 transitions. [2022-07-20 20:45:15,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 27 states have internal predecessors, (65), 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) [2022-07-20 20:45:15,267 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 112 transitions. [2022-07-20 20:45:15,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-07-20 20:45:15,271 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 20:45:15,271 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 20:45:15,291 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-20 20:45:15,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:45:15,491 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 20:45:15,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 20:45:15,492 INFO L85 PathProgramCache]: Analyzing trace with hash 949453489, now seen corresponding path program 5 times [2022-07-20 20:45:15,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 20:45:15,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169995757] [2022-07-20 20:45:15,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:45:15,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 20:45:15,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:45:15,845 INFO L134 CoverageAnalysis]: Checked inductivity of 678 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-07-20 20:45:15,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 20:45:15,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169995757] [2022-07-20 20:45:15,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169995757] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 20:45:15,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625554264] [2022-07-20 20:45:15,845 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-20 20:45:15,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:45:15,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 20:45:15,847 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) [2022-07-20 20:45:15,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-20 20:45:21,564 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2022-07-20 20:45:21,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 20:45:21,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-20 20:45:21,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 20:45:21,659 INFO L134 CoverageAnalysis]: Checked inductivity of 678 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-07-20 20:45:21,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 20:45:22,364 INFO L134 CoverageAnalysis]: Checked inductivity of 678 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-07-20 20:45:22,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625554264] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 20:45:22,365 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 20:45:22,365 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 53 [2022-07-20 20:45:22,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841708293] [2022-07-20 20:45:22,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 20:45:22,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-07-20 20:45:22,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 20:45:22,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-07-20 20:45:22,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2022-07-20 20:45:22,368 INFO L87 Difference]: Start difference. First operand 97 states and 112 transitions. Second operand has 53 states, 53 states have (on average 2.207547169811321) internal successors, (117), 53 states have internal predecessors, (117), 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) [2022-07-20 20:45:22,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 20:45:22,483 INFO L93 Difference]: Finished difference Result 195 states and 250 transitions. [2022-07-20 20:45:22,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-07-20 20:45:22,483 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.207547169811321) internal successors, (117), 53 states have internal predecessors, (117), 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 94 [2022-07-20 20:45:22,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 20:45:22,484 INFO L225 Difference]: With dead ends: 195 [2022-07-20 20:45:22,484 INFO L226 Difference]: Without dead ends: 149 [2022-07-20 20:45:22,485 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2022-07-20 20:45:22,486 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 75 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 20:45:22,486 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 116 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 20:45:22,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-07-20 20:45:22,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2022-07-20 20:45:22,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 1.1081081081081081) internal successors, (164), 148 states have internal predecessors, (164), 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) [2022-07-20 20:45:22,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 164 transitions. [2022-07-20 20:45:22,494 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 164 transitions. Word has length 94 [2022-07-20 20:45:22,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 20:45:22,494 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 164 transitions. [2022-07-20 20:45:22,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.207547169811321) internal successors, (117), 53 states have internal predecessors, (117), 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) [2022-07-20 20:45:22,494 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 164 transitions. [2022-07-20 20:45:22,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-07-20 20:45:22,497 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 20:45:22,497 INFO L195 NwaCegarLoop]: trace histogram [50, 50, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 20:45:22,522 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-20 20:45:22,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:45:22,698 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 20:45:22,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 20:45:22,699 INFO L85 PathProgramCache]: Analyzing trace with hash 2079151973, now seen corresponding path program 6 times [2022-07-20 20:45:22,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 20:45:22,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538102721] [2022-07-20 20:45:22,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:45:22,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 20:45:22,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:45:23,705 INFO L134 CoverageAnalysis]: Checked inductivity of 2602 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-07-20 20:45:23,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 20:45:23,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538102721] [2022-07-20 20:45:23,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538102721] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 20:45:23,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092060839] [2022-07-20 20:45:23,706 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-20 20:45:23,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:45:23,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 20:45:23,708 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) [2022-07-20 20:45:23,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-20 20:45:24,130 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-07-20 20:45:24,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 20:45:24,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-20 20:45:24,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 20:45:24,292 INFO L134 CoverageAnalysis]: Checked inductivity of 2602 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 2551 trivial. 0 not checked. [2022-07-20 20:45:24,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 20:45:24,460 INFO L134 CoverageAnalysis]: Checked inductivity of 2602 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 2551 trivial. 0 not checked. [2022-07-20 20:45:24,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092060839] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 20:45:24,461 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 20:45:24,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 9, 9] total 67 [2022-07-20 20:45:24,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588072788] [2022-07-20 20:45:24,461 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 20:45:24,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-07-20 20:45:24,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 20:45:24,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-07-20 20:45:24,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1497, Invalid=2925, Unknown=0, NotChecked=0, Total=4422 [2022-07-20 20:45:24,464 INFO L87 Difference]: Start difference. First operand 149 states and 164 transitions. Second operand has 67 states, 67 states have (on average 2.4477611940298507) internal successors, (164), 67 states have internal predecessors, (164), 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) [2022-07-20 20:45:25,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 20:45:25,699 INFO L93 Difference]: Finished difference Result 246 states and 308 transitions. [2022-07-20 20:45:25,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-07-20 20:45:25,700 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.4477611940298507) internal successors, (164), 67 states have internal predecessors, (164), 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 146 [2022-07-20 20:45:25,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 20:45:25,701 INFO L225 Difference]: With dead ends: 246 [2022-07-20 20:45:25,701 INFO L226 Difference]: Without dead ends: 200 [2022-07-20 20:45:25,703 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 278 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1975 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=4914, Invalid=8892, Unknown=0, NotChecked=0, Total=13806 [2022-07-20 20:45:25,704 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 545 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 332 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 545 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 332 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 20:45:25,704 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [545 Valid, 122 Invalid, 561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [332 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-20 20:45:25,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-07-20 20:45:25,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 199. [2022-07-20 20:45:25,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 1.1616161616161615) internal successors, (230), 198 states have internal predecessors, (230), 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) [2022-07-20 20:45:25,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 230 transitions. [2022-07-20 20:45:25,716 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 230 transitions. Word has length 146 [2022-07-20 20:45:25,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 20:45:25,716 INFO L495 AbstractCegarLoop]: Abstraction has 199 states and 230 transitions. [2022-07-20 20:45:25,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.4477611940298507) internal successors, (164), 67 states have internal predecessors, (164), 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) [2022-07-20 20:45:25,716 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 230 transitions. [2022-07-20 20:45:25,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2022-07-20 20:45:25,717 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 20:45:25,717 INFO L195 NwaCegarLoop]: trace histogram [51, 51, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 20:45:25,735 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-07-20 20:45:25,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:45:25,918 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 20:45:25,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 20:45:25,918 INFO L85 PathProgramCache]: Analyzing trace with hash 1233622247, now seen corresponding path program 7 times [2022-07-20 20:45:25,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 20:45:25,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572550430] [2022-07-20 20:45:25,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:45:25,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 20:45:26,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:45:26,869 INFO L134 CoverageAnalysis]: Checked inductivity of 3175 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 574 trivial. 0 not checked. [2022-07-20 20:45:26,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 20:45:26,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572550430] [2022-07-20 20:45:26,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572550430] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 20:45:26,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509908826] [2022-07-20 20:45:26,870 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-20 20:45:26,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:45:26,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 20:45:26,871 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) [2022-07-20 20:45:26,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-20 20:45:27,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:45:27,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 781 conjuncts, 53 conjunts are in the unsatisfiable core [2022-07-20 20:45:27,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 20:45:27,128 INFO L134 CoverageAnalysis]: Checked inductivity of 3175 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 574 trivial. 0 not checked. [2022-07-20 20:45:27,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 20:45:29,462 INFO L134 CoverageAnalysis]: Checked inductivity of 3175 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 574 trivial. 0 not checked. [2022-07-20 20:45:29,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509908826] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 20:45:29,462 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 20:45:29,463 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54, 54] total 107 [2022-07-20 20:45:29,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043712186] [2022-07-20 20:45:29,463 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 20:45:29,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2022-07-20 20:45:29,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 20:45:29,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2022-07-20 20:45:29,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2022-07-20 20:45:29,467 INFO L87 Difference]: Start difference. First operand 199 states and 230 transitions. Second operand has 107 states, 107 states have (on average 2.102803738317757) internal successors, (225), 107 states have internal predecessors, (225), 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) [2022-07-20 20:45:29,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 20:45:29,757 INFO L93 Difference]: Finished difference Result 399 states and 513 transitions. [2022-07-20 20:45:29,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-07-20 20:45:29,758 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 2.102803738317757) internal successors, (225), 107 states have internal predecessors, (225), 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 196 [2022-07-20 20:45:29,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 20:45:29,760 INFO L225 Difference]: With dead ends: 399 [2022-07-20 20:45:29,760 INFO L226 Difference]: Without dead ends: 305 [2022-07-20 20:45:29,763 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 444 GetRequests, 339 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2022-07-20 20:45:29,765 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 156 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 20:45:29,765 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 116 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 20:45:29,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2022-07-20 20:45:29,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 305. [2022-07-20 20:45:29,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 1.105263157894737) internal successors, (336), 304 states have internal predecessors, (336), 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) [2022-07-20 20:45:29,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 336 transitions. [2022-07-20 20:45:29,778 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 336 transitions. Word has length 196 [2022-07-20 20:45:29,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 20:45:29,779 INFO L495 AbstractCegarLoop]: Abstraction has 305 states and 336 transitions. [2022-07-20 20:45:29,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 2.102803738317757) internal successors, (225), 107 states have internal predecessors, (225), 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) [2022-07-20 20:45:29,779 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 336 transitions. [2022-07-20 20:45:29,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2022-07-20 20:45:29,781 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 20:45:29,781 INFO L195 NwaCegarLoop]: trace histogram [104, 104, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 20:45:29,799 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-20 20:45:29,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:45:29,999 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 20:45:30,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 20:45:30,000 INFO L85 PathProgramCache]: Analyzing trace with hash -2006247343, now seen corresponding path program 8 times [2022-07-20 20:45:30,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 20:45:30,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63747138] [2022-07-20 20:45:30,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:45:30,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 20:45:30,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:45:33,235 INFO L134 CoverageAnalysis]: Checked inductivity of 11390 backedges. 0 proven. 10816 refuted. 0 times theorem prover too weak. 574 trivial. 0 not checked. [2022-07-20 20:45:33,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 20:45:33,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63747138] [2022-07-20 20:45:33,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63747138] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 20:45:33,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753386890] [2022-07-20 20:45:33,235 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 20:45:33,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:45:33,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 20:45:33,237 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 20:45:33,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-20 20:45:33,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 20:45:33,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 20:45:33,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 1258 conjuncts, 106 conjunts are in the unsatisfiable core [2022-07-20 20:45:33,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 20:45:33,721 INFO L134 CoverageAnalysis]: Checked inductivity of 11390 backedges. 0 proven. 10816 refuted. 0 times theorem prover too weak. 574 trivial. 0 not checked. [2022-07-20 20:45:33,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 20:45:42,819 INFO L134 CoverageAnalysis]: Checked inductivity of 11390 backedges. 0 proven. 10816 refuted. 0 times theorem prover too weak. 574 trivial. 0 not checked. [2022-07-20 20:45:42,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753386890] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 20:45:42,819 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 20:45:42,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 107, 107] total 213 [2022-07-20 20:45:42,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592443753] [2022-07-20 20:45:42,820 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 20:45:42,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 213 states [2022-07-20 20:45:42,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 20:45:42,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 213 interpolants. [2022-07-20 20:45:42,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22578, Invalid=22578, Unknown=0, NotChecked=0, Total=45156 [2022-07-20 20:45:42,829 INFO L87 Difference]: Start difference. First operand 305 states and 336 transitions. Second operand has 213 states, 213 states have (on average 2.051643192488263) internal successors, (437), 213 states have internal predecessors, (437), 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) [2022-07-20 20:45:43,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 20:45:43,514 INFO L93 Difference]: Finished difference Result 611 states and 778 transitions. [2022-07-20 20:45:43,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 212 states. [2022-07-20 20:45:43,514 INFO L78 Accepts]: Start accepts. Automaton has has 213 states, 213 states have (on average 2.051643192488263) internal successors, (437), 213 states have internal predecessors, (437), 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 302 [2022-07-20 20:45:43,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 20:45:43,516 INFO L225 Difference]: With dead ends: 611 [2022-07-20 20:45:43,516 INFO L226 Difference]: Without dead ends: 517 [2022-07-20 20:45:43,538 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 709 GetRequests, 498 SyntacticMatches, 0 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=22578, Invalid=22578, Unknown=0, NotChecked=0, Total=45156 [2022-07-20 20:45:43,539 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 210 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 20:45:43,539 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 154 Invalid, 541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 430 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-20 20:45:43,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2022-07-20 20:45:43,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 517. [2022-07-20 20:45:43,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 517 states, 516 states have (on average 1.062015503875969) internal successors, (548), 516 states have internal predecessors, (548), 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) [2022-07-20 20:45:43,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 548 transitions. [2022-07-20 20:45:43,549 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 548 transitions. Word has length 302 [2022-07-20 20:45:43,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 20:45:43,549 INFO L495 AbstractCegarLoop]: Abstraction has 517 states and 548 transitions. [2022-07-20 20:45:43,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 213 states, 213 states have (on average 2.051643192488263) internal successors, (437), 213 states have internal predecessors, (437), 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) [2022-07-20 20:45:43,550 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 548 transitions. [2022-07-20 20:45:43,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 515 [2022-07-20 20:45:43,555 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 20:45:43,556 INFO L195 NwaCegarLoop]: trace histogram [210, 210, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 20:45:43,575 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-20 20:45:43,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-20 20:45:43,776 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 20:45:43,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 20:45:43,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1109860773, now seen corresponding path program 9 times [2022-07-20 20:45:43,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 20:45:43,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873990537] [2022-07-20 20:45:43,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:45:43,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 20:45:44,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:45:55,908 INFO L134 CoverageAnalysis]: Checked inductivity of 44674 backedges. 0 proven. 44100 refuted. 0 times theorem prover too weak. 574 trivial. 0 not checked. [2022-07-20 20:45:55,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 20:45:55,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873990537] [2022-07-20 20:45:55,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873990537] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 20:45:55,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302406789] [2022-07-20 20:45:55,909 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 20:45:55,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:45:55,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 20:45:55,911 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 20:45:55,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-20 20:45:57,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2022-07-20 20:45:57,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 20:45:57,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 33 conjunts are in the unsatisfiable core [2022-07-20 20:45:57,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 20:45:58,817 INFO L134 CoverageAnalysis]: Checked inductivity of 44674 backedges. 40 proven. 287 refuted. 0 times theorem prover too weak. 44347 trivial. 0 not checked. [2022-07-20 20:45:58,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 20:45:59,853 INFO L134 CoverageAnalysis]: Checked inductivity of 44674 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 44387 trivial. 0 not checked. [2022-07-20 20:45:59,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302406789] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 20:45:59,853 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 20:45:59,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [213, 19, 17] total 244 [2022-07-20 20:45:59,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886228937] [2022-07-20 20:45:59,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 20:45:59,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 244 states [2022-07-20 20:45:59,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 20:45:59,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 244 interpolants. [2022-07-20 20:45:59,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23105, Invalid=36187, Unknown=0, NotChecked=0, Total=59292 [2022-07-20 20:45:59,862 INFO L87 Difference]: Start difference. First operand 517 states and 548 transitions. Second operand has 244 states, 244 states have (on average 2.19672131147541) internal successors, (536), 244 states have internal predecessors, (536), 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) [2022-07-20 20:46:14,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 20:46:14,914 INFO L93 Difference]: Finished difference Result 710 states and 836 transitions. [2022-07-20 20:46:14,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 244 states. [2022-07-20 20:46:14,914 INFO L78 Accepts]: Start accepts. Automaton has has 244 states, 244 states have (on average 2.19672131147541) internal successors, (536), 244 states have internal predecessors, (536), 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 514 [2022-07-20 20:46:14,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 20:46:14,916 INFO L225 Difference]: With dead ends: 710 [2022-07-20 20:46:14,917 INFO L226 Difference]: Without dead ends: 616 [2022-07-20 20:46:14,926 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1450 GetRequests, 997 SyntacticMatches, 0 SemanticMatches, 453 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28723 ImplicationChecksByTransitivity, 26.2s TimeCoverageRelationStatistics Valid=74589, Invalid=131981, Unknown=0, NotChecked=0, Total=206570 [2022-07-20 20:46:14,927 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 1063 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 666 mSolverCounterSat, 591 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1063 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 1257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 591 IncrementalHoareTripleChecker+Valid, 666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-20 20:46:14,927 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1063 Valid, 154 Invalid, 1257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [591 Valid, 666 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-20 20:46:14,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2022-07-20 20:46:14,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 615. [2022-07-20 20:46:14,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 615 states, 614 states have (on average 1.1042345276872965) internal successors, (678), 614 states have internal predecessors, (678), 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) [2022-07-20 20:46:14,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 615 states to 615 states and 678 transitions. [2022-07-20 20:46:14,939 INFO L78 Accepts]: Start accepts. Automaton has 615 states and 678 transitions. Word has length 514 [2022-07-20 20:46:14,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 20:46:14,939 INFO L495 AbstractCegarLoop]: Abstraction has 615 states and 678 transitions. [2022-07-20 20:46:14,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 244 states, 244 states have (on average 2.19672131147541) internal successors, (536), 244 states have internal predecessors, (536), 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) [2022-07-20 20:46:14,940 INFO L276 IsEmpty]: Start isEmpty. Operand 615 states and 678 transitions. [2022-07-20 20:46:14,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 613 [2022-07-20 20:46:14,946 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 20:46:14,946 INFO L195 NwaCegarLoop]: trace histogram [211, 211, 30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 20:46:14,968 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-20 20:46:15,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:46:15,153 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 20:46:15,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 20:46:15,154 INFO L85 PathProgramCache]: Analyzing trace with hash 1095157799, now seen corresponding path program 10 times [2022-07-20 20:46:15,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 20:46:15,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929749843] [2022-07-20 20:46:15,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:46:15,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 20:46:15,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:46:27,210 INFO L134 CoverageAnalysis]: Checked inductivity of 47191 backedges. 0 proven. 44521 refuted. 0 times theorem prover too weak. 2670 trivial. 0 not checked. [2022-07-20 20:46:27,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 20:46:27,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929749843] [2022-07-20 20:46:27,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929749843] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 20:46:27,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678159913] [2022-07-20 20:46:27,211 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 20:46:27,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:46:27,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 20:46:27,212 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 20:46:27,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-20 20:46:31,941 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 20:46:31,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 20:46:31,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 2509 conjuncts, 213 conjunts are in the unsatisfiable core [2022-07-20 20:46:31,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 20:46:32,396 INFO L134 CoverageAnalysis]: Checked inductivity of 47191 backedges. 0 proven. 44521 refuted. 0 times theorem prover too weak. 2670 trivial. 0 not checked. [2022-07-20 20:46:32,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 20:47:07,598 INFO L134 CoverageAnalysis]: Checked inductivity of 47191 backedges. 0 proven. 44521 refuted. 0 times theorem prover too weak. 2670 trivial. 0 not checked. [2022-07-20 20:47:07,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678159913] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 20:47:07,598 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 20:47:07,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [214, 214, 214] total 427 [2022-07-20 20:47:07,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284956966] [2022-07-20 20:47:07,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 20:47:07,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 427 states [2022-07-20 20:47:07,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 20:47:07,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 427 interpolants. [2022-07-20 20:47:07,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90951, Invalid=90951, Unknown=0, NotChecked=0, Total=181902 [2022-07-20 20:47:07,634 INFO L87 Difference]: Start difference. First operand 615 states and 678 transitions. Second operand has 427 states, 427 states have (on average 2.0257611241217797) internal successors, (865), 427 states have internal predecessors, (865), 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) [2022-07-20 20:47:10,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 20:47:10,879 INFO L93 Difference]: Finished difference Result 1231 states and 1569 transitions. [2022-07-20 20:47:10,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 426 states. [2022-07-20 20:47:10,881 INFO L78 Accepts]: Start accepts. Automaton has has 427 states, 427 states have (on average 2.0257611241217797) internal successors, (865), 427 states have internal predecessors, (865), 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 612 [2022-07-20 20:47:10,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 20:47:10,884 INFO L225 Difference]: With dead ends: 1231 [2022-07-20 20:47:10,884 INFO L226 Difference]: Without dead ends: 1041 [2022-07-20 20:47:10,890 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1436 GetRequests, 1011 SyntacticMatches, 0 SemanticMatches, 425 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 844 ImplicationChecksByTransitivity, 46.0s TimeCoverageRelationStatistics Valid=90951, Invalid=90951, Unknown=0, NotChecked=0, Total=181902 [2022-07-20 20:47:10,891 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 424 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 856 mSolverCounterSat, 220 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 424 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 1076 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 220 IncrementalHoareTripleChecker+Valid, 856 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-20 20:47:10,891 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [424 Valid, 154 Invalid, 1076 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [220 Valid, 856 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-20 20:47:10,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1041 states. [2022-07-20 20:47:10,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1041 to 1041. [2022-07-20 20:47:10,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1041 states, 1040 states have (on average 1.0615384615384615) internal successors, (1104), 1040 states have internal predecessors, (1104), 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) [2022-07-20 20:47:10,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1041 states to 1041 states and 1104 transitions. [2022-07-20 20:47:10,910 INFO L78 Accepts]: Start accepts. Automaton has 1041 states and 1104 transitions. Word has length 612 [2022-07-20 20:47:10,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 20:47:10,910 INFO L495 AbstractCegarLoop]: Abstraction has 1041 states and 1104 transitions. [2022-07-20 20:47:10,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 427 states, 427 states have (on average 2.0257611241217797) internal successors, (865), 427 states have internal predecessors, (865), 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) [2022-07-20 20:47:10,911 INFO L276 IsEmpty]: Start isEmpty. Operand 1041 states and 1104 transitions. [2022-07-20 20:47:10,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1039 [2022-07-20 20:47:10,918 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 20:47:10,918 INFO L195 NwaCegarLoop]: trace histogram [424, 424, 30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 20:47:10,943 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-07-20 20:47:11,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-20 20:47:11,139 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 20:47:11,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 20:47:11,140 INFO L85 PathProgramCache]: Analyzing trace with hash -40706863, now seen corresponding path program 11 times [2022-07-20 20:47:11,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 20:47:11,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195267980] [2022-07-20 20:47:11,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:47:11,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 20:47:11,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:47:58,669 INFO L134 CoverageAnalysis]: Checked inductivity of 182446 backedges. 0 proven. 179776 refuted. 0 times theorem prover too weak. 2670 trivial. 0 not checked. [2022-07-20 20:47:58,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 20:47:58,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195267980] [2022-07-20 20:47:58,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195267980] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 20:47:58,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335963979] [2022-07-20 20:47:58,670 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-20 20:47:58,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:47:58,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 20:47:58,671 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 20:47:58,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process