./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-industry-pattern/array_assert_loop_dep.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 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-industry-pattern/array_assert_loop_dep.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 fb960067570884de0638f14e8f74b0912d9ff4ed83f9c3c33e6cd3e420d05661 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 09:51:08,942 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 09:51:08,943 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 09:51:08,990 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 09:51:08,991 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 09:51:08,994 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 09:51:08,996 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 09:51:08,997 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 09:51:08,998 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 09:51:09,003 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 09:51:09,003 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 09:51:09,005 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 09:51:09,006 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 09:51:09,008 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 09:51:09,009 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 09:51:09,010 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 09:51:09,011 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 09:51:09,012 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 09:51:09,016 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 09:51:09,019 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 09:51:09,020 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 09:51:09,021 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 09:51:09,021 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 09:51:09,022 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 09:51:09,025 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 09:51:09,025 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 09:51:09,025 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 09:51:09,027 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 09:51:09,031 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 09:51:09,032 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 09:51:09,033 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 09:51:09,033 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 09:51:09,035 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 09:51:09,035 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 09:51:09,036 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 09:51:09,037 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 09:51:09,037 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 09:51:09,038 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 09:51:09,038 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 09:51:09,038 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 09:51:09,039 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 09:51:09,040 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 09:51:09,064 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 09:51:09,066 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 09:51:09,067 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 09:51:09,067 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 09:51:09,068 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 09:51:09,068 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 09:51:09,068 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 09:51:09,069 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 09:51:09,069 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 09:51:09,069 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 09:51:09,070 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 09:51:09,070 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 09:51:09,070 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 09:51:09,070 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 09:51:09,070 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 09:51:09,070 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 09:51:09,071 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 09:51:09,071 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 09:51:09,071 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 09:51:09,071 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 09:51:09,071 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 09:51:09,071 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 09:51:09,072 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 09:51:09,072 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 09:51:09,072 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 09:51:09,072 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 09:51:09,072 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 09:51:09,072 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 09:51:09,072 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 09:51:09,073 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 09:51:09,073 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 09:51:09,073 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 09:51:09,073 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 09:51:09,073 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 09:51:09,074 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fb960067570884de0638f14e8f74b0912d9ff4ed83f9c3c33e6cd3e420d05661 [2021-12-21 09:51:09,284 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 09:51:09,299 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 09:51:09,303 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 09:51:09,304 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 09:51:09,304 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 09:51:09,305 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-industry-pattern/array_assert_loop_dep.i [2021-12-21 09:51:09,352 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/27cf2fdaa/517779a944154ea69c35362345823a9f/FLAG707963469 [2021-12-21 09:51:09,658 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 09:51:09,658 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-industry-pattern/array_assert_loop_dep.i [2021-12-21 09:51:09,662 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/27cf2fdaa/517779a944154ea69c35362345823a9f/FLAG707963469 [2021-12-21 09:51:10,092 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/27cf2fdaa/517779a944154ea69c35362345823a9f [2021-12-21 09:51:10,094 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 09:51:10,095 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 09:51:10,096 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 09:51:10,096 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 09:51:10,099 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 09:51:10,100 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 09:51:10" (1/1) ... [2021-12-21 09:51:10,101 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6dad1ec2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:51:10, skipping insertion in model container [2021-12-21 09:51:10,101 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 09:51:10" (1/1) ... [2021-12-21 09:51:10,107 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 09:51:10,118 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 09:51:10,223 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-industry-pattern/array_assert_loop_dep.i[814,827] [2021-12-21 09:51:10,237 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 09:51:10,244 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 09:51:10,259 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-industry-pattern/array_assert_loop_dep.i[814,827] [2021-12-21 09:51:10,267 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 09:51:10,278 INFO L208 MainTranslator]: Completed translation [2021-12-21 09:51:10,279 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:51:10 WrapperNode [2021-12-21 09:51:10,279 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 09:51:10,280 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 09:51:10,281 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 09:51:10,281 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 09:51:10,286 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:51:10" (1/1) ... [2021-12-21 09:51:10,291 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:51:10" (1/1) ... [2021-12-21 09:51:10,305 INFO L137 Inliner]: procedures = 15, calls = 13, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 44 [2021-12-21 09:51:10,306 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 09:51:10,307 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 09:51:10,307 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 09:51:10,307 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 09:51:10,314 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:51:10" (1/1) ... [2021-12-21 09:51:10,314 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:51:10" (1/1) ... [2021-12-21 09:51:10,325 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:51:10" (1/1) ... [2021-12-21 09:51:10,325 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:51:10" (1/1) ... [2021-12-21 09:51:10,335 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:51:10" (1/1) ... [2021-12-21 09:51:10,341 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:51:10" (1/1) ... [2021-12-21 09:51:10,344 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:51:10" (1/1) ... [2021-12-21 09:51:10,345 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 09:51:10,346 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 09:51:10,347 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 09:51:10,347 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 09:51:10,348 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:51:10" (1/1) ... [2021-12-21 09:51:10,352 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 09:51:10,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 09:51:10,372 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) [2021-12-21 09:51:10,388 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 [2021-12-21 09:51:10,402 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 09:51:10,402 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 09:51:10,402 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-21 09:51:10,402 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-21 09:51:10,403 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 09:51:10,403 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 09:51:10,403 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-21 09:51:10,403 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-21 09:51:10,450 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 09:51:10,452 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 09:51:10,588 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 09:51:10,592 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 09:51:10,593 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-21 09:51:10,594 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:51:10 BoogieIcfgContainer [2021-12-21 09:51:10,594 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 09:51:10,595 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 09:51:10,596 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 09:51:10,598 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 09:51:10,598 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 09:51:10" (1/3) ... [2021-12-21 09:51:10,599 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a124b4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 09:51:10, skipping insertion in model container [2021-12-21 09:51:10,599 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:51:10" (2/3) ... [2021-12-21 09:51:10,599 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a124b4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 09:51:10, skipping insertion in model container [2021-12-21 09:51:10,600 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:51:10" (3/3) ... [2021-12-21 09:51:10,600 INFO L111 eAbstractionObserver]: Analyzing ICFG array_assert_loop_dep.i [2021-12-21 09:51:10,604 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 09:51:10,604 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 09:51:10,635 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 09:51:10,640 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-21 09:51:10,640 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 09:51:10,649 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 14 states have (on average 1.5) internal successors, (21), 15 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) [2021-12-21 09:51:10,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-21 09:51:10,653 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:51:10,653 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:51:10,654 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:51:10,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:51:10,657 INFO L85 PathProgramCache]: Analyzing trace with hash 1807957391, now seen corresponding path program 1 times [2021-12-21 09:51:10,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:51:10,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176772579] [2021-12-21 09:51:10,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:51:10,665 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:51:10,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:51:10,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:51:10,763 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:51:10,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176772579] [2021-12-21 09:51:10,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176772579] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 09:51:10,764 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 09:51:10,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 09:51:10,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266446093] [2021-12-21 09:51:10,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 09:51:10,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 09:51:10,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:51:10,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 09:51:10,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 09:51:10,788 INFO L87 Difference]: Start difference. First operand has 16 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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) [2021-12-21 09:51:10,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:51:10,815 INFO L93 Difference]: Finished difference Result 37 states and 51 transitions. [2021-12-21 09:51:10,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 09:51:10,818 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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 7 [2021-12-21 09:51:10,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:51:10,823 INFO L225 Difference]: With dead ends: 37 [2021-12-21 09:51:10,823 INFO L226 Difference]: Without dead ends: 21 [2021-12-21 09:51:10,825 INFO L932 BasicCegarLoop]: 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 [2021-12-21 09:51:10,828 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 7 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 09:51:10,829 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 21 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 09:51:10,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-12-21 09:51:10,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 17. [2021-12-21 09:51:10,848 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) [2021-12-21 09:51:10,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2021-12-21 09:51:10,850 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 7 [2021-12-21 09:51:10,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:51:10,850 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2021-12-21 09:51:10,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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) [2021-12-21 09:51:10,850 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2021-12-21 09:51:10,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-21 09:51:10,851 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:51:10,851 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:51:10,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 09:51:10,851 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:51:10,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:51:10,852 INFO L85 PathProgramCache]: Analyzing trace with hash -369319347, now seen corresponding path program 1 times [2021-12-21 09:51:10,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:51:10,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015413944] [2021-12-21 09:51:10,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:51:10,853 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:51:10,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:51:10,885 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:51:10,886 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:51:10,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015413944] [2021-12-21 09:51:10,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015413944] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 09:51:10,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169109690] [2021-12-21 09:51:10,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:51:10,886 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:51:10,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 09:51:10,888 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) [2021-12-21 09:51:10,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-21 09:51:10,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:51:10,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-21 09:51:10,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 09:51:11,016 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:51:11,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 09:51:11,060 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:51:11,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169109690] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 09:51:11,061 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 09:51:11,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-12-21 09:51:11,062 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615508029] [2021-12-21 09:51:11,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 09:51:11,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 09:51:11,063 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:51:11,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 09:51:11,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-21 09:51:11,063 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:51:11,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:51:11,130 INFO L93 Difference]: Finished difference Result 53 states and 62 transitions. [2021-12-21 09:51:11,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 09:51:11,131 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-12-21 09:51:11,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:51:11,132 INFO L225 Difference]: With dead ends: 53 [2021-12-21 09:51:11,132 INFO L226 Difference]: Without dead ends: 41 [2021-12-21 09:51:11,132 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-21 09:51:11,133 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 41 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 09:51:11,134 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 23 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 09:51:11,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-12-21 09:51:11,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 28. [2021-12-21 09:51:11,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 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) [2021-12-21 09:51:11,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2021-12-21 09:51:11,138 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 9 [2021-12-21 09:51:11,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:51:11,139 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2021-12-21 09:51:11,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:51:11,139 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2021-12-21 09:51:11,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-21 09:51:11,140 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:51:11,140 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:51:11,157 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-21 09:51:11,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:51:11,348 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:51:11,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:51:11,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1716192135, now seen corresponding path program 2 times [2021-12-21 09:51:11,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:51:11,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007584599] [2021-12-21 09:51:11,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:51:11,349 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:51:11,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:51:11,414 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:51:11,415 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:51:11,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007584599] [2021-12-21 09:51:11,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007584599] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 09:51:11,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165525750] [2021-12-21 09:51:11,415 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 09:51:11,416 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:51:11,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 09:51:11,417 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) [2021-12-21 09:51:11,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-21 09:51:11,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 09:51:11,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 09:51:11,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-21 09:51:11,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 09:51:11,527 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:51:11,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 09:51:11,604 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:51:11,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165525750] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 09:51:11,605 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 09:51:11,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2021-12-21 09:51:11,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437255000] [2021-12-21 09:51:11,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 09:51:11,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-21 09:51:11,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:51:11,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-21 09:51:11,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-12-21 09:51:11,608 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 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) [2021-12-21 09:51:11,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:51:11,683 INFO L93 Difference]: Finished difference Result 112 states and 130 transitions. [2021-12-21 09:51:11,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-21 09:51:11,684 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-12-21 09:51:11,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:51:11,686 INFO L225 Difference]: With dead ends: 112 [2021-12-21 09:51:11,686 INFO L226 Difference]: Without dead ends: 95 [2021-12-21 09:51:11,687 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-12-21 09:51:11,688 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 156 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 09:51:11,688 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 50 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 09:51:11,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-12-21 09:51:11,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 55. [2021-12-21 09:51:11,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.1481481481481481) internal successors, (62), 54 states have internal predecessors, (62), 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) [2021-12-21 09:51:11,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 62 transitions. [2021-12-21 09:51:11,695 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 62 transitions. Word has length 15 [2021-12-21 09:51:11,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:51:11,696 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 62 transitions. [2021-12-21 09:51:11,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 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) [2021-12-21 09:51:11,696 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 62 transitions. [2021-12-21 09:51:11,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-21 09:51:11,697 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:51:11,697 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:51:11,717 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-21 09:51:11,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-12-21 09:51:11,912 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:51:11,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:51:11,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1328180091, now seen corresponding path program 3 times [2021-12-21 09:51:11,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:51:11,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093233407] [2021-12-21 09:51:11,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:51:11,913 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:51:11,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:51:12,026 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:51:12,026 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:51:12,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093233407] [2021-12-21 09:51:12,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093233407] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 09:51:12,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991041874] [2021-12-21 09:51:12,027 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-21 09:51:12,027 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:51:12,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 09:51:12,032 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) [2021-12-21 09:51:12,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-21 09:51:12,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-12-21 09:51:12,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 09:51:12,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-21 09:51:12,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 09:51:12,160 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:51:12,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 09:51:12,350 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:51:12,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991041874] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 09:51:12,351 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 09:51:12,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2021-12-21 09:51:12,351 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020852274] [2021-12-21 09:51:12,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 09:51:12,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-21 09:51:12,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:51:12,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-21 09:51:12,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-12-21 09:51:12,355 INFO L87 Difference]: Start difference. First operand 55 states and 62 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 25 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) [2021-12-21 09:51:12,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:51:12,534 INFO L93 Difference]: Finished difference Result 235 states and 271 transitions. [2021-12-21 09:51:12,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-21 09:51:12,534 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 25 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) Word has length 27 [2021-12-21 09:51:12,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:51:12,536 INFO L225 Difference]: With dead ends: 235 [2021-12-21 09:51:12,536 INFO L226 Difference]: Without dead ends: 203 [2021-12-21 09:51:12,536 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-12-21 09:51:12,537 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 347 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 09:51:12,537 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [347 Valid, 98 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 09:51:12,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-12-21 09:51:12,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 109. [2021-12-21 09:51:12,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.1296296296296295) internal successors, (122), 108 states have internal predecessors, (122), 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) [2021-12-21 09:51:12,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 122 transitions. [2021-12-21 09:51:12,547 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 122 transitions. Word has length 27 [2021-12-21 09:51:12,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:51:12,547 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 122 transitions. [2021-12-21 09:51:12,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 25 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) [2021-12-21 09:51:12,548 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 122 transitions. [2021-12-21 09:51:12,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-21 09:51:12,548 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:51:12,548 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:51:12,566 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-21 09:51:12,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:51:12,771 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:51:12,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:51:12,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1458393443, now seen corresponding path program 4 times [2021-12-21 09:51:12,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:51:12,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810199067] [2021-12-21 09:51:12,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:51:12,773 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:51:12,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:51:13,062 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:51:13,062 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:51:13,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810199067] [2021-12-21 09:51:13,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810199067] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 09:51:13,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042173100] [2021-12-21 09:51:13,063 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-21 09:51:13,063 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:51:13,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 09:51:13,064 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) [2021-12-21 09:51:13,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-21 09:51:13,123 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-21 09:51:13,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 09:51:13,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-21 09:51:13,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 09:51:13,228 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:51:13,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 09:51:13,817 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:51:13,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042173100] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 09:51:13,818 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 09:51:13,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2021-12-21 09:51:13,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577335317] [2021-12-21 09:51:13,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 09:51:13,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-12-21 09:51:13,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:51:13,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-12-21 09:51:13,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-12-21 09:51:13,821 INFO L87 Difference]: Start difference. First operand 109 states and 122 transitions. Second operand has 49 states, 49 states have (on average 2.0408163265306123) internal successors, (100), 49 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:51:14,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:51:14,258 INFO L93 Difference]: Finished difference Result 481 states and 553 transitions. [2021-12-21 09:51:14,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-12-21 09:51:14,258 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.0408163265306123) internal successors, (100), 49 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-12-21 09:51:14,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:51:14,260 INFO L225 Difference]: With dead ends: 481 [2021-12-21 09:51:14,260 INFO L226 Difference]: Without dead ends: 419 [2021-12-21 09:51:14,261 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-12-21 09:51:14,262 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 897 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 222 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 897 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 222 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 09:51:14,262 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [897 Valid, 199 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [222 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 09:51:14,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2021-12-21 09:51:14,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 217. [2021-12-21 09:51:14,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 1.1203703703703705) internal successors, (242), 216 states have internal predecessors, (242), 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) [2021-12-21 09:51:14,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 242 transitions. [2021-12-21 09:51:14,275 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 242 transitions. Word has length 51 [2021-12-21 09:51:14,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:51:14,275 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 242 transitions. [2021-12-21 09:51:14,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.0408163265306123) internal successors, (100), 49 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:51:14,276 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 242 transitions. [2021-12-21 09:51:14,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-12-21 09:51:14,277 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:51:14,278 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:51:14,297 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-21 09:51:14,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:51:14,487 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:51:14,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:51:14,488 INFO L85 PathProgramCache]: Analyzing trace with hash 546272563, now seen corresponding path program 5 times [2021-12-21 09:51:14,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:51:14,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360719188] [2021-12-21 09:51:14,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:51:14,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:51:14,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:51:15,417 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:51:15,417 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:51:15,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360719188] [2021-12-21 09:51:15,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360719188] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 09:51:15,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495110426] [2021-12-21 09:51:15,418 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-21 09:51:15,418 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:51:15,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 09:51:15,420 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) [2021-12-21 09:51:15,422 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-21 09:51:18,679 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) [2021-12-21 09:51:18,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 09:51:18,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 48 conjunts are in the unsatisfiable core [2021-12-21 09:51:18,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 09:51:18,865 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:51:18,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 09:51:20,937 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:51:20,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495110426] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 09:51:20,937 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 09:51:20,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 97 [2021-12-21 09:51:20,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561487620] [2021-12-21 09:51:20,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 09:51:20,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2021-12-21 09:51:20,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:51:20,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2021-12-21 09:51:20,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2021-12-21 09:51:20,943 INFO L87 Difference]: Start difference. First operand 217 states and 242 transitions. Second operand has 97 states, 97 states have (on average 2.020618556701031) internal successors, (196), 97 states have internal predecessors, (196), 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) [2021-12-21 09:51:22,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:51:22,831 INFO L93 Difference]: Finished difference Result 973 states and 1117 transitions. [2021-12-21 09:51:22,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-12-21 09:51:22,831 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 2.020618556701031) internal successors, (196), 97 states have internal predecessors, (196), 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 99 [2021-12-21 09:51:22,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:51:22,834 INFO L225 Difference]: With dead ends: 973 [2021-12-21 09:51:22,834 INFO L226 Difference]: Without dead ends: 851 [2021-12-21 09:51:22,836 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2021-12-21 09:51:22,837 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 3144 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 696 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3144 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 1176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 696 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-21 09:51:22,837 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3144 Valid, 384 Invalid, 1176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [696 Valid, 480 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-21 09:51:22,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 851 states. [2021-12-21 09:51:22,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 851 to 433. [2021-12-21 09:51:22,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 432 states have (on average 1.1157407407407407) internal successors, (482), 432 states have internal predecessors, (482), 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) [2021-12-21 09:51:22,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 482 transitions. [2021-12-21 09:51:22,854 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 482 transitions. Word has length 99 [2021-12-21 09:51:22,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:51:22,854 INFO L470 AbstractCegarLoop]: Abstraction has 433 states and 482 transitions. [2021-12-21 09:51:22,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 2.020618556701031) internal successors, (196), 97 states have internal predecessors, (196), 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) [2021-12-21 09:51:22,855 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 482 transitions. [2021-12-21 09:51:22,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-12-21 09:51:22,859 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:51:22,860 INFO L514 BasicCegarLoop]: trace histogram [94, 94, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:51:22,881 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-21 09:51:23,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:51:23,067 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:51:23,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:51:23,068 INFO L85 PathProgramCache]: Analyzing trace with hash 1352998099, now seen corresponding path program 6 times [2021-12-21 09:51:23,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:51:23,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436437882] [2021-12-21 09:51:23,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:51:23,069 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:51:23,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:51:25,723 INFO L134 CoverageAnalysis]: Checked inductivity of 8836 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:51:25,724 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:51:25,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436437882] [2021-12-21 09:51:25,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436437882] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 09:51:25,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005449037] [2021-12-21 09:51:25,724 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-21 09:51:25,724 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:51:25,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 09:51:25,725 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) [2021-12-21 09:51:25,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process