./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-examples/sanfoundry_27_ground.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 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/sanfoundry_27_ground.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 40b578d2ddf68a49bc52037a6e4860a392bad1b49fc77d85682d536447864a03 --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 08:50:24,025 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 08:50:24,026 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 08:50:24,056 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 08:50:24,057 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 08:50:24,058 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 08:50:24,059 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 08:50:24,061 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 08:50:24,062 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 08:50:24,065 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 08:50:24,066 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 08:50:24,067 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 08:50:24,068 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 08:50:24,069 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 08:50:24,070 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 08:50:24,072 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 08:50:24,073 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 08:50:24,074 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 08:50:24,075 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 08:50:24,079 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 08:50:24,081 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 08:50:24,081 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 08:50:24,082 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 08:50:24,083 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 08:50:24,084 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 08:50:24,089 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 08:50:24,089 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 08:50:24,090 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 08:50:24,090 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 08:50:24,091 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 08:50:24,092 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 08:50:24,092 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 08:50:24,093 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 08:50:24,093 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 08:50:24,094 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 08:50:24,094 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 08:50:24,094 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 08:50:24,095 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 08:50:24,095 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 08:50:24,096 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 08:50:24,097 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 08:50:24,098 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 08:50:24,099 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 08:50:24,124 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 08:50:24,125 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 08:50:24,125 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 08:50:24,125 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 08:50:24,126 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 08:50:24,126 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 08:50:24,126 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 08:50:24,126 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 08:50:24,126 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 08:50:24,127 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 08:50:24,127 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 08:50:24,127 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 08:50:24,127 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 08:50:24,128 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 08:50:24,128 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 08:50:24,128 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 08:50:24,128 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 08:50:24,128 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 08:50:24,128 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 08:50:24,129 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 08:50:24,129 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 08:50:24,129 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 08:50:24,130 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 08:50:24,130 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 08:50:24,130 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 08:50:24,130 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 08:50:24,130 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 08:50:24,130 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 08:50:24,130 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 08:50:24,131 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 08:50:24,131 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 08:50:24,131 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 08:50:24,131 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 08:50:24,131 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 40b578d2ddf68a49bc52037a6e4860a392bad1b49fc77d85682d536447864a03 [2022-07-19 08:50:24,328 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 08:50:24,344 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 08:50:24,346 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 08:50:24,347 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 08:50:24,347 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 08:50:24,348 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/sanfoundry_27_ground.i [2022-07-19 08:50:24,397 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a17d976d/88e05a00e4ca47bcbac850609ee63c6b/FLAG47cc8e0ff [2022-07-19 08:50:24,716 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 08:50:24,716 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/sanfoundry_27_ground.i [2022-07-19 08:50:24,721 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a17d976d/88e05a00e4ca47bcbac850609ee63c6b/FLAG47cc8e0ff [2022-07-19 08:50:25,134 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a17d976d/88e05a00e4ca47bcbac850609ee63c6b [2022-07-19 08:50:25,136 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 08:50:25,138 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 08:50:25,140 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 08:50:25,140 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 08:50:25,143 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 08:50:25,143 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 08:50:25" (1/1) ... [2022-07-19 08:50:25,144 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@82fe63d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:50:25, skipping insertion in model container [2022-07-19 08:50:25,144 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 08:50:25" (1/1) ... [2022-07-19 08:50:25,149 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 08:50:25,160 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 08:50:25,281 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/sanfoundry_27_ground.i[813,826] [2022-07-19 08:50:25,291 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 08:50:25,295 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 08:50:25,303 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/sanfoundry_27_ground.i[813,826] [2022-07-19 08:50:25,306 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 08:50:25,314 INFO L208 MainTranslator]: Completed translation [2022-07-19 08:50:25,314 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:50:25 WrapperNode [2022-07-19 08:50:25,314 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 08:50:25,315 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 08:50:25,315 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 08:50:25,315 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 08:50:25,320 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:50:25" (1/1) ... [2022-07-19 08:50:25,324 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:50:25" (1/1) ... [2022-07-19 08:50:25,335 INFO L137 Inliner]: procedures = 16, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 63 [2022-07-19 08:50:25,336 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 08:50:25,336 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 08:50:25,336 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 08:50:25,336 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 08:50:25,341 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:50:25" (1/1) ... [2022-07-19 08:50:25,341 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:50:25" (1/1) ... [2022-07-19 08:50:25,349 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:50:25" (1/1) ... [2022-07-19 08:50:25,350 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:50:25" (1/1) ... [2022-07-19 08:50:25,358 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:50:25" (1/1) ... [2022-07-19 08:50:25,362 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:50:25" (1/1) ... [2022-07-19 08:50:25,365 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:50:25" (1/1) ... [2022-07-19 08:50:25,367 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 08:50:25,368 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 08:50:25,368 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 08:50:25,368 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 08:50:25,369 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:50:25" (1/1) ... [2022-07-19 08:50:25,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 08:50:25,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 08:50:25,390 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) [2022-07-19 08:50:25,410 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 [2022-07-19 08:50:25,426 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 08:50:25,426 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 08:50:25,427 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-19 08:50:25,427 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-19 08:50:25,427 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 08:50:25,427 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 08:50:25,427 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-19 08:50:25,427 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-19 08:50:25,472 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 08:50:25,473 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 08:50:25,568 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 08:50:25,572 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 08:50:25,572 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-19 08:50:25,573 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 08:50:25 BoogieIcfgContainer [2022-07-19 08:50:25,574 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 08:50:25,575 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 08:50:25,575 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 08:50:25,577 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 08:50:25,577 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 08:50:25" (1/3) ... [2022-07-19 08:50:25,578 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a1798ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 08:50:25, skipping insertion in model container [2022-07-19 08:50:25,578 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:50:25" (2/3) ... [2022-07-19 08:50:25,578 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a1798ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 08:50:25, skipping insertion in model container [2022-07-19 08:50:25,578 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 08:50:25" (3/3) ... [2022-07-19 08:50:25,579 INFO L111 eAbstractionObserver]: Analyzing ICFG sanfoundry_27_ground.i [2022-07-19 08:50:25,589 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 08:50:25,589 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 08:50:25,619 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 08:50:25,624 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@423651b6, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7db053e1 [2022-07-19 08:50:25,625 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-19 08:50:25,628 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 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) [2022-07-19 08:50:25,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-19 08:50:25,632 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 08:50:25,632 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 08:50:25,633 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 08:50:25,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 08:50:25,637 INFO L85 PathProgramCache]: Analyzing trace with hash -2006137184, now seen corresponding path program 1 times [2022-07-19 08:50:25,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 08:50:25,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130986566] [2022-07-19 08:50:25,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 08:50:25,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 08:50:25,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 08:50:25,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 08:50:25,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 08:50:25,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130986566] [2022-07-19 08:50:25,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130986566] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 08:50:25,749 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 08:50:25,749 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 08:50:25,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309678358] [2022-07-19 08:50:25,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 08:50:25,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 08:50:25,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 08:50:25,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 08:50:25,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 08:50:25,776 INFO L87 Difference]: Start difference. First operand has 19 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 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) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 08:50:25,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 08:50:25,799 INFO L93 Difference]: Finished difference Result 36 states and 50 transitions. [2022-07-19 08:50:25,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 08:50:25,802 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-07-19 08:50:25,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 08:50:25,807 INFO L225 Difference]: With dead ends: 36 [2022-07-19 08:50:25,807 INFO L226 Difference]: Without dead ends: 17 [2022-07-19 08:50:25,809 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 [2022-07-19 08:50:25,812 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 1 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 08:50:25,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 33 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 08:50:25,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-07-19 08:50:25,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2022-07-19 08:50:25,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 08:50:25,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2022-07-19 08:50:25,834 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 9 [2022-07-19 08:50:25,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 08:50:25,835 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2022-07-19 08:50:25,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 08:50:25,835 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2022-07-19 08:50:25,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-19 08:50:25,836 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 08:50:25,836 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 08:50:25,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 08:50:25,836 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 08:50:25,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 08:50:25,837 INFO L85 PathProgramCache]: Analyzing trace with hash 1564799315, now seen corresponding path program 1 times [2022-07-19 08:50:25,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 08:50:25,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627182802] [2022-07-19 08:50:25,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 08:50:25,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 08:50:25,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 08:50:25,896 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 08:50:25,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 08:50:25,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627182802] [2022-07-19 08:50:25,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627182802] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 08:50:25,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163039979] [2022-07-19 08:50:25,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 08:50:25,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 08:50:25,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 08:50:25,912 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) [2022-07-19 08:50:25,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 08:50:25,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 08:50:25,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-19 08:50:25,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 08:50:25,987 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 08:50:25,987 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 08:50:25,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163039979] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 08:50:25,988 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 08:50:25,988 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2022-07-19 08:50:25,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790909417] [2022-07-19 08:50:25,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 08:50:25,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 08:50:25,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 08:50:25,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 08:50:25,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 08:50:25,999 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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) [2022-07-19 08:50:26,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 08:50:26,028 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2022-07-19 08:50:26,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 08:50:26,029 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-07-19 08:50:26,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 08:50:26,029 INFO L225 Difference]: With dead ends: 27 [2022-07-19 08:50:26,029 INFO L226 Difference]: Without dead ends: 20 [2022-07-19 08:50:26,029 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 08:50:26,030 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 4 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 08:50:26,031 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 22 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 08:50:26,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-07-19 08:50:26,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 17. [2022-07-19 08:50:26,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 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) [2022-07-19 08:50:26,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2022-07-19 08:50:26,033 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 11 [2022-07-19 08:50:26,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 08:50:26,033 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2022-07-19 08:50:26,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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) [2022-07-19 08:50:26,034 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2022-07-19 08:50:26,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-19 08:50:26,034 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 08:50:26,034 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 08:50:26,055 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-19 08:50:26,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 08:50:26,248 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 08:50:26,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 08:50:26,249 INFO L85 PathProgramCache]: Analyzing trace with hash -324137903, now seen corresponding path program 1 times [2022-07-19 08:50:26,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 08:50:26,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140301347] [2022-07-19 08:50:26,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 08:50:26,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 08:50:26,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 08:50:26,301 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 08:50:26,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 08:50:26,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140301347] [2022-07-19 08:50:26,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140301347] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 08:50:26,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709026187] [2022-07-19 08:50:26,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 08:50:26,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 08:50:26,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 08:50:26,306 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) [2022-07-19 08:50:26,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 08:50:26,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 08:50:26,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-19 08:50:26,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 08:50:26,401 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 08:50:26,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 08:50:26,423 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 08:50:26,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709026187] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 08:50:26,425 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 08:50:26,425 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-07-19 08:50:26,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127200471] [2022-07-19 08:50:26,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 08:50:26,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 08:50:26,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 08:50:26,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 08:50:26,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-07-19 08:50:26,428 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 08:50:26,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 08:50:26,476 INFO L93 Difference]: Finished difference Result 41 states and 53 transitions. [2022-07-19 08:50:26,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 08:50:26,477 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-07-19 08:50:26,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 08:50:26,478 INFO L225 Difference]: With dead ends: 41 [2022-07-19 08:50:26,478 INFO L226 Difference]: Without dead ends: 29 [2022-07-19 08:50:26,478 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-07-19 08:50:26,479 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 16 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 08:50:26,480 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 33 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 08:50:26,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-07-19 08:50:26,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-07-19 08:50:26,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 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) [2022-07-19 08:50:26,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2022-07-19 08:50:26,483 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 14 [2022-07-19 08:50:26,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 08:50:26,484 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2022-07-19 08:50:26,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 08:50:26,484 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2022-07-19 08:50:26,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-19 08:50:26,485 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 08:50:26,485 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 08:50:26,503 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-19 08:50:26,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-07-19 08:50:26,704 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 08:50:26,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 08:50:26,704 INFO L85 PathProgramCache]: Analyzing trace with hash -1260321897, now seen corresponding path program 2 times [2022-07-19 08:50:26,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 08:50:26,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615481993] [2022-07-19 08:50:26,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 08:50:26,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 08:50:26,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 08:50:26,768 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-19 08:50:26,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 08:50:26,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615481993] [2022-07-19 08:50:26,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615481993] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 08:50:26,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432369738] [2022-07-19 08:50:26,769 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 08:50:26,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 08:50:26,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 08:50:26,770 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) [2022-07-19 08:50:26,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-19 08:50:26,819 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 08:50:26,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 08:50:26,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-19 08:50:26,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 08:50:26,840 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-19 08:50:26,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 08:50:26,896 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-19 08:50:26,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432369738] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 08:50:26,897 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 08:50:26,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-07-19 08:50:26,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624481622] [2022-07-19 08:50:26,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 08:50:26,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-19 08:50:26,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 08:50:26,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-19 08:50:26,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-07-19 08:50:26,902 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 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) [2022-07-19 08:50:26,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 08:50:26,982 INFO L93 Difference]: Finished difference Result 77 states and 104 transitions. [2022-07-19 08:50:26,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-19 08:50:26,982 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 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 26 [2022-07-19 08:50:26,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 08:50:26,986 INFO L225 Difference]: With dead ends: 77 [2022-07-19 08:50:26,986 INFO L226 Difference]: Without dead ends: 59 [2022-07-19 08:50:26,986 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-07-19 08:50:26,987 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 69 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 08:50:26,988 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 46 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 08:50:26,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-07-19 08:50:26,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2022-07-19 08:50:26,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.206896551724138) internal successors, (70), 58 states have internal predecessors, (70), 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) [2022-07-19 08:50:26,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 70 transitions. [2022-07-19 08:50:26,993 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 70 transitions. Word has length 26 [2022-07-19 08:50:26,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 08:50:26,994 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 70 transitions. [2022-07-19 08:50:26,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 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) [2022-07-19 08:50:26,994 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 70 transitions. [2022-07-19 08:50:26,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-19 08:50:26,995 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 08:50:26,995 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 08:50:27,013 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-07-19 08:50:27,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 08:50:27,213 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 08:50:27,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 08:50:27,214 INFO L85 PathProgramCache]: Analyzing trace with hash 642014435, now seen corresponding path program 3 times [2022-07-19 08:50:27,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 08:50:27,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506346888] [2022-07-19 08:50:27,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 08:50:27,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 08:50:27,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 08:50:27,441 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2022-07-19 08:50:27,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 08:50:27,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506346888] [2022-07-19 08:50:27,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506346888] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 08:50:27,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745287342] [2022-07-19 08:50:27,442 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 08:50:27,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 08:50:27,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 08:50:27,444 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) [2022-07-19 08:50:27,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-19 08:50:27,525 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-07-19 08:50:27,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 08:50:27,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-19 08:50:27,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 08:50:27,565 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-07-19 08:50:27,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 08:50:27,743 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-07-19 08:50:27,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745287342] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 08:50:27,743 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 08:50:27,744 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 23 [2022-07-19 08:50:27,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911256642] [2022-07-19 08:50:27,744 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 08:50:27,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-19 08:50:27,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 08:50:27,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-19 08:50:27,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2022-07-19 08:50:27,746 INFO L87 Difference]: Start difference. First operand 59 states and 70 transitions. Second operand has 23 states, 23 states have (on average 4.086956521739131) internal successors, (94), 23 states have internal predecessors, (94), 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) [2022-07-19 08:50:27,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 08:50:27,883 INFO L93 Difference]: Finished difference Result 150 states and 204 transitions. [2022-07-19 08:50:27,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-19 08:50:27,883 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.086956521739131) internal successors, (94), 23 states have internal predecessors, (94), 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 56 [2022-07-19 08:50:27,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 08:50:27,884 INFO L225 Difference]: With dead ends: 150 [2022-07-19 08:50:27,884 INFO L226 Difference]: Without dead ends: 114 [2022-07-19 08:50:27,885 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2022-07-19 08:50:27,885 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 202 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 08:50:27,886 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 65 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 08:50:27,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-07-19 08:50:27,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2022-07-19 08:50:27,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 1.2035398230088497) internal successors, (136), 113 states have internal predecessors, (136), 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) [2022-07-19 08:50:27,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 136 transitions. [2022-07-19 08:50:27,893 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 136 transitions. Word has length 56 [2022-07-19 08:50:27,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 08:50:27,893 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 136 transitions. [2022-07-19 08:50:27,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.086956521739131) internal successors, (94), 23 states have internal predecessors, (94), 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) [2022-07-19 08:50:27,894 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 136 transitions. [2022-07-19 08:50:27,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-07-19 08:50:27,896 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 08:50:27,896 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 08:50:27,930 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-19 08:50:28,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 08:50:28,113 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 08:50:28,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 08:50:28,114 INFO L85 PathProgramCache]: Analyzing trace with hash -1738221653, now seen corresponding path program 4 times [2022-07-19 08:50:28,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 08:50:28,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795051936] [2022-07-19 08:50:28,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 08:50:28,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 08:50:28,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 08:50:28,416 INFO L134 CoverageAnalysis]: Checked inductivity of 1031 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2022-07-19 08:50:28,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 08:50:28,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795051936] [2022-07-19 08:50:28,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795051936] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 08:50:28,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980969020] [2022-07-19 08:50:28,417 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 08:50:28,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 08:50:28,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 08:50:28,418 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) [2022-07-19 08:50:28,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-19 08:50:28,520 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 08:50:28,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 08:50:28,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-19 08:50:28,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 08:50:28,593 INFO L134 CoverageAnalysis]: Checked inductivity of 1031 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2022-07-19 08:50:28,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 08:50:29,120 INFO L134 CoverageAnalysis]: Checked inductivity of 1031 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2022-07-19 08:50:29,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980969020] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 08:50:29,121 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 08:50:29,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 47 [2022-07-19 08:50:29,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371181226] [2022-07-19 08:50:29,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 08:50:29,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-07-19 08:50:29,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 08:50:29,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-07-19 08:50:29,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2022-07-19 08:50:29,124 INFO L87 Difference]: Start difference. First operand 114 states and 136 transitions. Second operand has 47 states, 47 states have (on average 2.148936170212766) internal successors, (101), 47 states have internal predecessors, (101), 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) [2022-07-19 08:50:29,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 08:50:29,444 INFO L93 Difference]: Finished difference Result 298 states and 410 transitions. [2022-07-19 08:50:29,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-07-19 08:50:29,445 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.148936170212766) internal successors, (101), 47 states have internal predecessors, (101), 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 111 [2022-07-19 08:50:29,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 08:50:29,446 INFO L225 Difference]: With dead ends: 298 [2022-07-19 08:50:29,446 INFO L226 Difference]: Without dead ends: 229 [2022-07-19 08:50:29,447 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2022-07-19 08:50:29,449 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 558 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 558 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 08:50:29,449 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [558 Valid, 73 Invalid, 446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 08:50:29,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2022-07-19 08:50:29,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 229. [2022-07-19 08:50:29,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 1.2017543859649122) internal successors, (274), 228 states have internal predecessors, (274), 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) [2022-07-19 08:50:29,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 274 transitions. [2022-07-19 08:50:29,461 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 274 transitions. Word has length 111 [2022-07-19 08:50:29,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 08:50:29,461 INFO L495 AbstractCegarLoop]: Abstraction has 229 states and 274 transitions. [2022-07-19 08:50:29,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.148936170212766) internal successors, (101), 47 states have internal predecessors, (101), 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) [2022-07-19 08:50:29,462 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 274 transitions. [2022-07-19 08:50:29,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2022-07-19 08:50:29,464 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 08:50:29,464 INFO L195 NwaCegarLoop]: trace histogram [44, 44, 43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 08:50:29,503 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-19 08:50:29,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 08:50:29,678 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 08:50:29,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 08:50:29,678 INFO L85 PathProgramCache]: Analyzing trace with hash -808999193, now seen corresponding path program 5 times [2022-07-19 08:50:29,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 08:50:29,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159146031] [2022-07-19 08:50:29,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 08:50:29,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 08:50:29,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 08:50:30,581 INFO L134 CoverageAnalysis]: Checked inductivity of 4688 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 2752 trivial. 0 not checked. [2022-07-19 08:50:30,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 08:50:30,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159146031] [2022-07-19 08:50:30,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159146031] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 08:50:30,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117332282] [2022-07-19 08:50:30,582 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 08:50:30,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 08:50:30,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 08:50:30,585 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) [2022-07-19 08:50:30,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-19 08:50:48,485 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 45 check-sat command(s) [2022-07-19 08:50:48,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 08:50:48,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 793 conjuncts, 46 conjunts are in the unsatisfiable core [2022-07-19 08:50:48,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 08:50:48,644 INFO L134 CoverageAnalysis]: Checked inductivity of 4688 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 2752 trivial. 0 not checked. [2022-07-19 08:50:48,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 08:50:50,444 INFO L134 CoverageAnalysis]: Checked inductivity of 4688 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 2752 trivial. 0 not checked. [2022-07-19 08:50:50,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117332282] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 08:50:50,447 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 08:50:50,447 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 93 [2022-07-19 08:50:50,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595144938] [2022-07-19 08:50:50,448 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 08:50:50,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-07-19 08:50:50,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 08:50:50,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-07-19 08:50:50,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2022-07-19 08:50:50,461 INFO L87 Difference]: Start difference. First operand 229 states and 274 transitions. Second operand has 93 states, 93 states have (on average 2.075268817204301) internal successors, (193), 93 states have internal predecessors, (193), 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) [2022-07-19 08:50:51,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 08:50:51,552 INFO L93 Difference]: Finished difference Result 597 states and 824 transitions. [2022-07-19 08:50:51,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-07-19 08:50:51,553 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 2.075268817204301) internal successors, (193), 93 states have internal predecessors, (193), 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 226 [2022-07-19 08:50:51,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 08:50:51,557 INFO L225 Difference]: With dead ends: 597 [2022-07-19 08:50:51,557 INFO L226 Difference]: Without dead ends: 459 [2022-07-19 08:50:51,560 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 497 GetRequests, 406 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2022-07-19 08:50:51,561 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 1299 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 500 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1299 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 969 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 500 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-19 08:50:51,561 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1299 Valid, 143 Invalid, 969 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [500 Valid, 469 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-19 08:50:51,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2022-07-19 08:50:51,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 459. [2022-07-19 08:50:51,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 458 states have (on average 1.2008733624454149) internal successors, (550), 458 states have internal predecessors, (550), 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) [2022-07-19 08:50:51,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 550 transitions. [2022-07-19 08:50:51,599 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 550 transitions. Word has length 226 [2022-07-19 08:50:51,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 08:50:51,599 INFO L495 AbstractCegarLoop]: Abstraction has 459 states and 550 transitions. [2022-07-19 08:50:51,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 2.075268817204301) internal successors, (193), 93 states have internal predecessors, (193), 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) [2022-07-19 08:50:51,600 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 550 transitions. [2022-07-19 08:50:51,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 457 [2022-07-19 08:50:51,610 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 08:50:51,610 INFO L195 NwaCegarLoop]: trace histogram [90, 90, 89, 89, 89, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 08:50:51,646 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-19 08:50:51,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 08:50:51,811 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 08:50:51,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 08:50:51,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1955011709, now seen corresponding path program 6 times [2022-07-19 08:50:51,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 08:50:51,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462755448] [2022-07-19 08:50:51,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 08:50:51,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 08:50:52,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 08:50:54,336 INFO L134 CoverageAnalysis]: Checked inductivity of 19937 backedges. 0 proven. 8100 refuted. 0 times theorem prover too weak. 11837 trivial. 0 not checked. [2022-07-19 08:50:54,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 08:50:54,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462755448] [2022-07-19 08:50:54,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462755448] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 08:50:54,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499792996] [2022-07-19 08:50:54,337 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-19 08:50:54,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 08:50:54,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 08:50:54,339 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) [2022-07-19 08:50:54,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process