./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem03_label29.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3a877d22 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/eca-rers2012/Problem03_label29.c -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 372b0f8557f493ed9d29c5f8057b8dc54ad330866696fd4878e863a88379edbf --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 09:04:44,932 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 09:04:44,935 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 09:04:44,994 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 09:04:44,994 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 09:04:44,997 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 09:04:44,998 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 09:04:45,000 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 09:04:45,002 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 09:04:45,006 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 09:04:45,007 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 09:04:45,008 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 09:04:45,008 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 09:04:45,010 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 09:04:45,011 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 09:04:45,012 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 09:04:45,015 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 09:04:45,016 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 09:04:45,017 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 09:04:45,018 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 09:04:45,021 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 09:04:45,022 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 09:04:45,023 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 09:04:45,024 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 09:04:45,026 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 09:04:45,027 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 09:04:45,027 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 09:04:45,028 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 09:04:45,028 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 09:04:45,029 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 09:04:45,029 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 09:04:45,030 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 09:04:45,031 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 09:04:45,032 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 09:04:45,033 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 09:04:45,033 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 09:04:45,034 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 09:04:45,034 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 09:04:45,034 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 09:04:45,035 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 09:04:45,035 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 09:04:45,036 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 09:04:45,060 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 09:04:45,060 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 09:04:45,061 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 09:04:45,061 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 09:04:45,062 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 09:04:45,062 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 09:04:45,062 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 09:04:45,062 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 09:04:45,062 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 09:04:45,063 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 09:04:45,063 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 09:04:45,063 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 09:04:45,064 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 09:04:45,064 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 09:04:45,064 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 09:04:45,064 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 09:04:45,064 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 09:04:45,064 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 09:04:45,064 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 09:04:45,064 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 09:04:45,065 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 09:04:45,065 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 09:04:45,065 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 09:04:45,065 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 09:04:45,065 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 09:04:45,065 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 09:04:45,065 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 09:04:45,066 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 09:04:45,067 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 09:04:45,067 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 09:04:45,067 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 09:04:45,067 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 09:04:45,067 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 09:04:45,067 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 09:04:45,068 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 372b0f8557f493ed9d29c5f8057b8dc54ad330866696fd4878e863a88379edbf [2021-12-15 09:04:45,291 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 09:04:45,308 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 09:04:45,310 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 09:04:45,310 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 09:04:45,311 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 09:04:45,312 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem03_label29.c [2021-12-15 09:04:45,364 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/107382191/63e23ed1b02040a3b1adeb53ed91169e/FLAGdf2395dab [2021-12-15 09:04:45,832 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 09:04:45,833 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label29.c [2021-12-15 09:04:45,850 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/107382191/63e23ed1b02040a3b1adeb53ed91169e/FLAGdf2395dab [2021-12-15 09:04:45,865 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/107382191/63e23ed1b02040a3b1adeb53ed91169e [2021-12-15 09:04:45,867 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 09:04:45,868 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 09:04:45,870 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 09:04:45,870 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 09:04:45,873 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 09:04:45,873 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:04:45" (1/1) ... [2021-12-15 09:04:45,875 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d916a49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:04:45, skipping insertion in model container [2021-12-15 09:04:45,875 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:04:45" (1/1) ... [2021-12-15 09:04:45,880 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 09:04:45,933 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 09:04:46,309 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/eca-rers2012/Problem03_label29.c[58258,58271] [2021-12-15 09:04:46,340 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 09:04:46,346 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 09:04:46,511 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/eca-rers2012/Problem03_label29.c[58258,58271] [2021-12-15 09:04:46,520 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 09:04:46,532 INFO L208 MainTranslator]: Completed translation [2021-12-15 09:04:46,533 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:04:46 WrapperNode [2021-12-15 09:04:46,534 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 09:04:46,535 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 09:04:46,535 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 09:04:46,535 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 09:04:46,540 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:04:46" (1/1) ... [2021-12-15 09:04:46,564 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:04:46" (1/1) ... [2021-12-15 09:04:46,632 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1771 [2021-12-15 09:04:46,632 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 09:04:46,633 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 09:04:46,633 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 09:04:46,633 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 09:04:46,639 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:04:46" (1/1) ... [2021-12-15 09:04:46,639 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:04:46" (1/1) ... [2021-12-15 09:04:46,646 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:04:46" (1/1) ... [2021-12-15 09:04:46,647 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:04:46" (1/1) ... [2021-12-15 09:04:46,685 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:04:46" (1/1) ... [2021-12-15 09:04:46,699 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:04:46" (1/1) ... [2021-12-15 09:04:46,709 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:04:46" (1/1) ... [2021-12-15 09:04:46,723 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 09:04:46,725 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 09:04:46,726 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 09:04:46,726 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 09:04:46,726 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:04:46" (1/1) ... [2021-12-15 09:04:46,731 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 09:04:46,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:04:46,747 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) [2021-12-15 09:04:46,780 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 [2021-12-15 09:04:46,808 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 09:04:46,808 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 09:04:46,808 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 09:04:46,808 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 09:04:46,926 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 09:04:46,928 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 09:04:48,039 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 09:04:48,045 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 09:04:48,046 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-15 09:04:48,047 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:04:48 BoogieIcfgContainer [2021-12-15 09:04:48,047 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 09:04:48,048 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 09:04:48,048 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 09:04:48,050 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 09:04:48,051 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 09:04:45" (1/3) ... [2021-12-15 09:04:48,051 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@480cfd7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:04:48, skipping insertion in model container [2021-12-15 09:04:48,051 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:04:46" (2/3) ... [2021-12-15 09:04:48,052 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@480cfd7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:04:48, skipping insertion in model container [2021-12-15 09:04:48,052 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:04:48" (3/3) ... [2021-12-15 09:04:48,053 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem03_label29.c [2021-12-15 09:04:48,056 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 09:04:48,056 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 09:04:48,084 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 09:04:48,089 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 [2021-12-15 09:04:48,089 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 09:04:48,101 INFO L276 IsEmpty]: Start isEmpty. Operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 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) [2021-12-15 09:04:48,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-12-15 09:04:48,110 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:04:48,111 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:04:48,111 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:04:48,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:04:48,114 INFO L85 PathProgramCache]: Analyzing trace with hash 800753066, now seen corresponding path program 1 times [2021-12-15 09:04:48,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:04:48,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319366091] [2021-12-15 09:04:48,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:04:48,121 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:04:48,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:04:48,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:04:48,478 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:04:48,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319366091] [2021-12-15 09:04:48,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319366091] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:04:48,479 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:04:48,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:04:48,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813918734] [2021-12-15 09:04:48,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:04:48,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:04:48,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:04:48,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:04:48,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:04:48,511 INFO L87 Difference]: Start difference. First operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 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 59.333333333333336) internal successors, (178), 2 states have internal predecessors, (178), 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) [2021-12-15 09:04:49,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:04:49,414 INFO L93 Difference]: Finished difference Result 823 states and 1459 transitions. [2021-12-15 09:04:49,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:04:49,429 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 2 states have internal predecessors, (178), 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 178 [2021-12-15 09:04:49,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:04:49,444 INFO L225 Difference]: With dead ends: 823 [2021-12-15 09:04:49,444 INFO L226 Difference]: Without dead ends: 444 [2021-12-15 09:04:49,452 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:04:49,455 INFO L933 BasicCegarLoop]: 213 mSDtfsCounter, 53 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 658 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 658 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-15 09:04:49,456 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 244 Invalid, 821 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 658 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-15 09:04:49,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2021-12-15 09:04:49,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 443. [2021-12-15 09:04:49,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 442 states have (on average 1.420814479638009) internal successors, (628), 442 states have internal predecessors, (628), 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) [2021-12-15 09:04:49,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 628 transitions. [2021-12-15 09:04:49,495 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 628 transitions. Word has length 178 [2021-12-15 09:04:49,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:04:49,496 INFO L470 AbstractCegarLoop]: Abstraction has 443 states and 628 transitions. [2021-12-15 09:04:49,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 2 states have internal predecessors, (178), 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) [2021-12-15 09:04:49,496 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 628 transitions. [2021-12-15 09:04:49,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2021-12-15 09:04:49,499 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:04:49,499 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:04:49,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 09:04:49,500 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:04:49,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:04:49,500 INFO L85 PathProgramCache]: Analyzing trace with hash -726821495, now seen corresponding path program 1 times [2021-12-15 09:04:49,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:04:49,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600090622] [2021-12-15 09:04:49,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:04:49,501 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:04:49,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:04:49,558 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:04:49,559 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:04:49,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600090622] [2021-12-15 09:04:49,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600090622] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:04:49,560 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:04:49,560 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:04:49,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424780847] [2021-12-15 09:04:49,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:04:49,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:04:49,561 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:04:49,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:04:49,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:04:49,562 INFO L87 Difference]: Start difference. First operand 443 states and 628 transitions. Second operand has 3 states, 3 states have (on average 62.0) internal successors, (186), 2 states have internal predecessors, (186), 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) [2021-12-15 09:04:50,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:04:50,146 INFO L93 Difference]: Finished difference Result 1310 states and 1864 transitions. [2021-12-15 09:04:50,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:04:50,147 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.0) internal successors, (186), 2 states have internal predecessors, (186), 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 186 [2021-12-15 09:04:50,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:04:50,163 INFO L225 Difference]: With dead ends: 1310 [2021-12-15 09:04:50,163 INFO L226 Difference]: Without dead ends: 869 [2021-12-15 09:04:50,168 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:04:50,169 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 247 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 09:04:50,170 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [247 Valid, 92 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 09:04:50,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 869 states. [2021-12-15 09:04:50,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 869 to 855. [2021-12-15 09:04:50,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 855 states, 854 states have (on average 1.3864168618266979) internal successors, (1184), 854 states have internal predecessors, (1184), 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) [2021-12-15 09:04:50,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 855 states to 855 states and 1184 transitions. [2021-12-15 09:04:50,227 INFO L78 Accepts]: Start accepts. Automaton has 855 states and 1184 transitions. Word has length 186 [2021-12-15 09:04:50,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:04:50,227 INFO L470 AbstractCegarLoop]: Abstraction has 855 states and 1184 transitions. [2021-12-15 09:04:50,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.0) internal successors, (186), 2 states have internal predecessors, (186), 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) [2021-12-15 09:04:50,228 INFO L276 IsEmpty]: Start isEmpty. Operand 855 states and 1184 transitions. [2021-12-15 09:04:50,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2021-12-15 09:04:50,230 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:04:50,230 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:04:50,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 09:04:50,231 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:04:50,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:04:50,231 INFO L85 PathProgramCache]: Analyzing trace with hash 1639909094, now seen corresponding path program 1 times [2021-12-15 09:04:50,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:04:50,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695642629] [2021-12-15 09:04:50,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:04:50,232 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:04:50,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:04:50,282 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:04:50,282 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:04:50,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695642629] [2021-12-15 09:04:50,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695642629] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:04:50,283 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:04:50,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:04:50,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858110220] [2021-12-15 09:04:50,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:04:50,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:04:50,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:04:50,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:04:50,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:04:50,285 INFO L87 Difference]: Start difference. First operand 855 states and 1184 transitions. Second operand has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 2 states have internal predecessors, (191), 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) [2021-12-15 09:04:50,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:04:50,584 INFO L93 Difference]: Finished difference Result 1688 states and 2338 transitions. [2021-12-15 09:04:50,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:04:50,584 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 2 states have internal predecessors, (191), 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 191 [2021-12-15 09:04:50,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:04:50,587 INFO L225 Difference]: With dead ends: 1688 [2021-12-15 09:04:50,587 INFO L226 Difference]: Without dead ends: 835 [2021-12-15 09:04:50,588 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:04:50,589 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 329 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-15 09:04:50,589 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [329 Valid, 31 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-15 09:04:50,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 835 states. [2021-12-15 09:04:50,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 835 to 835. [2021-12-15 09:04:50,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 835 states, 834 states have (on average 1.3453237410071943) internal successors, (1122), 834 states have internal predecessors, (1122), 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) [2021-12-15 09:04:50,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 835 states to 835 states and 1122 transitions. [2021-12-15 09:04:50,604 INFO L78 Accepts]: Start accepts. Automaton has 835 states and 1122 transitions. Word has length 191 [2021-12-15 09:04:50,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:04:50,605 INFO L470 AbstractCegarLoop]: Abstraction has 835 states and 1122 transitions. [2021-12-15 09:04:50,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 2 states have internal predecessors, (191), 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) [2021-12-15 09:04:50,605 INFO L276 IsEmpty]: Start isEmpty. Operand 835 states and 1122 transitions. [2021-12-15 09:04:50,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-12-15 09:04:50,607 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:04:50,607 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:04:50,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 09:04:50,608 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:04:50,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:04:50,608 INFO L85 PathProgramCache]: Analyzing trace with hash 490147013, now seen corresponding path program 1 times [2021-12-15 09:04:50,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:04:50,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599097896] [2021-12-15 09:04:50,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:04:50,609 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:04:50,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:04:50,679 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-15 09:04:50,679 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:04:50,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599097896] [2021-12-15 09:04:50,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599097896] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:04:50,680 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:04:50,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:04:50,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024501909] [2021-12-15 09:04:50,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:04:50,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:04:50,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:04:50,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:04:50,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:04:50,682 INFO L87 Difference]: Start difference. First operand 835 states and 1122 transitions. Second operand has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 2 states have internal predecessors, (191), 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) [2021-12-15 09:04:51,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:04:51,284 INFO L93 Difference]: Finished difference Result 2500 states and 3361 transitions. [2021-12-15 09:04:51,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:04:51,285 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 2 states have internal predecessors, (191), 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 195 [2021-12-15 09:04:51,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:04:51,289 INFO L225 Difference]: With dead ends: 2500 [2021-12-15 09:04:51,289 INFO L226 Difference]: Without dead ends: 1667 [2021-12-15 09:04:51,290 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:04:51,291 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 286 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 651 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 09:04:51,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [286 Valid, 51 Invalid, 708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 651 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 09:04:51,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1667 states. [2021-12-15 09:04:51,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1667 to 1665. [2021-12-15 09:04:51,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1665 states, 1664 states have (on average 1.3389423076923077) internal successors, (2228), 1664 states have internal predecessors, (2228), 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) [2021-12-15 09:04:51,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1665 states to 1665 states and 2228 transitions. [2021-12-15 09:04:51,317 INFO L78 Accepts]: Start accepts. Automaton has 1665 states and 2228 transitions. Word has length 195 [2021-12-15 09:04:51,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:04:51,317 INFO L470 AbstractCegarLoop]: Abstraction has 1665 states and 2228 transitions. [2021-12-15 09:04:51,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 2 states have internal predecessors, (191), 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) [2021-12-15 09:04:51,318 INFO L276 IsEmpty]: Start isEmpty. Operand 1665 states and 2228 transitions. [2021-12-15 09:04:51,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2021-12-15 09:04:51,320 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:04:51,321 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:04:51,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 09:04:51,321 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:04:51,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:04:51,322 INFO L85 PathProgramCache]: Analyzing trace with hash -1294418448, now seen corresponding path program 1 times [2021-12-15 09:04:51,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:04:51,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639960119] [2021-12-15 09:04:51,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:04:51,322 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:04:51,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:04:51,371 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-15 09:04:51,371 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:04:51,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639960119] [2021-12-15 09:04:51,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639960119] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:04:51,372 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:04:51,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:04:51,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406795252] [2021-12-15 09:04:51,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:04:51,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:04:51,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:04:51,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:04:51,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:04:51,374 INFO L87 Difference]: Start difference. First operand 1665 states and 2228 transitions. Second operand has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 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) [2021-12-15 09:04:51,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:04:51,573 INFO L93 Difference]: Finished difference Result 4975 states and 6659 transitions. [2021-12-15 09:04:51,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:04:51,573 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 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 198 [2021-12-15 09:04:51,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:04:51,581 INFO L225 Difference]: With dead ends: 4975 [2021-12-15 09:04:51,582 INFO L226 Difference]: Without dead ends: 3312 [2021-12-15 09:04:51,583 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 [2021-12-15 09:04:51,584 INFO L933 BasicCegarLoop]: 279 mSDtfsCounter, 322 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 09:04:51,584 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [322 Valid, 528 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-15 09:04:51,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3312 states. [2021-12-15 09:04:51,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3312 to 3308. [2021-12-15 09:04:51,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3308 states, 3307 states have (on average 1.3377683701239795) internal successors, (4424), 3307 states have internal predecessors, (4424), 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) [2021-12-15 09:04:51,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3308 states to 3308 states and 4424 transitions. [2021-12-15 09:04:51,636 INFO L78 Accepts]: Start accepts. Automaton has 3308 states and 4424 transitions. Word has length 198 [2021-12-15 09:04:51,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:04:51,636 INFO L470 AbstractCegarLoop]: Abstraction has 3308 states and 4424 transitions. [2021-12-15 09:04:51,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 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) [2021-12-15 09:04:51,637 INFO L276 IsEmpty]: Start isEmpty. Operand 3308 states and 4424 transitions. [2021-12-15 09:04:51,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-12-15 09:04:51,640 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:04:51,641 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:04:51,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-15 09:04:51,641 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:04:51,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:04:51,642 INFO L85 PathProgramCache]: Analyzing trace with hash 309639563, now seen corresponding path program 1 times [2021-12-15 09:04:51,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:04:51,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395576621] [2021-12-15 09:04:51,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:04:51,642 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:04:51,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:04:51,691 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 28 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:04:51,691 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:04:51,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395576621] [2021-12-15 09:04:51,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395576621] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:04:51,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134143534] [2021-12-15 09:04:51,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:04:51,692 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:04:51,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:04:51,694 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) [2021-12-15 09:04:51,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-15 09:04:51,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:04:51,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 09:04:51,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:04:52,038 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-15 09:04:52,038 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:04:52,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134143534] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:04:52,039 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:04:52,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-12-15 09:04:52,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495366082] [2021-12-15 09:04:52,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:04:52,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:04:52,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:04:52,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:04:52,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:04:52,041 INFO L87 Difference]: Start difference. First operand 3308 states and 4424 transitions. Second operand has 3 states, 3 states have (on average 65.0) internal successors, (195), 3 states have internal predecessors, (195), 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) [2021-12-15 09:04:52,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:04:52,639 INFO L93 Difference]: Finished difference Result 8244 states and 11386 transitions. [2021-12-15 09:04:52,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:04:52,640 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 65.0) internal successors, (195), 3 states have internal predecessors, (195), 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 200 [2021-12-15 09:04:52,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:04:52,654 INFO L225 Difference]: With dead ends: 8244 [2021-12-15 09:04:52,655 INFO L226 Difference]: Without dead ends: 4938 [2021-12-15 09:04:52,660 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:04:52,660 INFO L933 BasicCegarLoop]: 345 mSDtfsCounter, 212 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 09:04:52,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 366 Invalid, 661 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 495 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 09:04:52,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4938 states. [2021-12-15 09:04:52,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4938 to 4932. [2021-12-15 09:04:52,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4932 states, 4931 states have (on average 1.2646522003650376) internal successors, (6236), 4931 states have internal predecessors, (6236), 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) [2021-12-15 09:04:52,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4932 states to 4932 states and 6236 transitions. [2021-12-15 09:04:52,772 INFO L78 Accepts]: Start accepts. Automaton has 4932 states and 6236 transitions. Word has length 200 [2021-12-15 09:04:52,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:04:52,773 INFO L470 AbstractCegarLoop]: Abstraction has 4932 states and 6236 transitions. [2021-12-15 09:04:52,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.0) internal successors, (195), 3 states have internal predecessors, (195), 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) [2021-12-15 09:04:52,773 INFO L276 IsEmpty]: Start isEmpty. Operand 4932 states and 6236 transitions. [2021-12-15 09:04:52,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2021-12-15 09:04:52,777 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:04:52,778 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:04:52,815 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-15 09:04:52,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-12-15 09:04:52,996 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:04:52,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:04:52,996 INFO L85 PathProgramCache]: Analyzing trace with hash -215854226, now seen corresponding path program 1 times [2021-12-15 09:04:52,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:04:52,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085931481] [2021-12-15 09:04:52,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:04:52,997 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:04:53,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:04:53,071 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 37 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:04:53,071 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:04:53,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085931481] [2021-12-15 09:04:53,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085931481] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:04:53,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876891358] [2021-12-15 09:04:53,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:04:53,072 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:04:53,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:04:53,080 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) [2021-12-15 09:04:53,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-15 09:04:53,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:04:53,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-15 09:04:53,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:04:53,558 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-15 09:04:53,559 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:04:53,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876891358] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:04:53,559 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:04:53,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-15 09:04:53,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133781973] [2021-12-15 09:04:53,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:04:53,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:04:53,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:04:53,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:04:53,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:04:53,561 INFO L87 Difference]: Start difference. First operand 4932 states and 6236 transitions. Second operand has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 states have internal predecessors, (211), 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) [2021-12-15 09:04:54,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:04:54,111 INFO L93 Difference]: Finished difference Result 14751 states and 18649 transitions. [2021-12-15 09:04:54,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:04:54,112 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 states have internal predecessors, (211), 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 216 [2021-12-15 09:04:54,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:04:54,138 INFO L225 Difference]: With dead ends: 14751 [2021-12-15 09:04:54,139 INFO L226 Difference]: Without dead ends: 9821 [2021-12-15 09:04:54,146 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:04:54,147 INFO L933 BasicCegarLoop]: 293 mSDtfsCounter, 73 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 535 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 09:04:54,147 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 309 Invalid, 674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 535 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 09:04:54,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9821 states. [2021-12-15 09:04:54,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9821 to 9815. [2021-12-15 09:04:54,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9815 states, 9814 states have (on average 1.2079682086814754) internal successors, (11855), 9814 states have internal predecessors, (11855), 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) [2021-12-15 09:04:54,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9815 states to 9815 states and 11855 transitions. [2021-12-15 09:04:54,330 INFO L78 Accepts]: Start accepts. Automaton has 9815 states and 11855 transitions. Word has length 216 [2021-12-15 09:04:54,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:04:54,331 INFO L470 AbstractCegarLoop]: Abstraction has 9815 states and 11855 transitions. [2021-12-15 09:04:54,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 states have internal predecessors, (211), 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) [2021-12-15 09:04:54,331 INFO L276 IsEmpty]: Start isEmpty. Operand 9815 states and 11855 transitions. [2021-12-15 09:04:54,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2021-12-15 09:04:54,340 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:04:54,340 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:04:54,360 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-15 09:04:54,554 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,SelfDestructingSolverStorable6 [2021-12-15 09:04:54,555 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:04:54,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:04:54,555 INFO L85 PathProgramCache]: Analyzing trace with hash -1238323550, now seen corresponding path program 1 times [2021-12-15 09:04:54,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:04:54,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153863288] [2021-12-15 09:04:54,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:04:54,555 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:04:54,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:04:54,618 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-15 09:04:54,620 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:04:54,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153863288] [2021-12-15 09:04:54,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153863288] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:04:54,620 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:04:54,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:04:54,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005226684] [2021-12-15 09:04:54,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:04:54,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:04:54,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:04:54,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:04:54,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:04:54,623 INFO L87 Difference]: Start difference. First operand 9815 states and 11855 transitions. Second operand has 4 states, 4 states have (on average 58.25) internal successors, (233), 3 states have internal predecessors, (233), 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) [2021-12-15 09:04:55,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:04:55,281 INFO L93 Difference]: Finished difference Result 19640 states and 23731 transitions. [2021-12-15 09:04:55,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:04:55,282 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 58.25) internal successors, (233), 3 states have internal predecessors, (233), 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 247 [2021-12-15 09:04:55,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:04:55,316 INFO L225 Difference]: With dead ends: 19640 [2021-12-15 09:04:55,316 INFO L226 Difference]: Without dead ends: 9827 [2021-12-15 09:04:55,327 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:04:55,329 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 756 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 240 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 756 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 812 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 240 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 09:04:55,330 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [756 Valid, 44 Invalid, 812 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [240 Valid, 572 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 09:04:55,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9827 states. [2021-12-15 09:04:55,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9827 to 9409. [2021-12-15 09:04:55,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9409 states, 9408 states have (on average 1.204187925170068) internal successors, (11329), 9408 states have internal predecessors, (11329), 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) [2021-12-15 09:04:55,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9409 states to 9409 states and 11329 transitions. [2021-12-15 09:04:55,462 INFO L78 Accepts]: Start accepts. Automaton has 9409 states and 11329 transitions. Word has length 247 [2021-12-15 09:04:55,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:04:55,463 INFO L470 AbstractCegarLoop]: Abstraction has 9409 states and 11329 transitions. [2021-12-15 09:04:55,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 58.25) internal successors, (233), 3 states have internal predecessors, (233), 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) [2021-12-15 09:04:55,464 INFO L276 IsEmpty]: Start isEmpty. Operand 9409 states and 11329 transitions. [2021-12-15 09:04:55,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2021-12-15 09:04:55,470 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:04:55,470 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:04:55,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-15 09:04:55,471 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:04:55,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:04:55,471 INFO L85 PathProgramCache]: Analyzing trace with hash 1763287382, now seen corresponding path program 1 times [2021-12-15 09:04:55,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:04:55,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723897325] [2021-12-15 09:04:55,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:04:55,472 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:04:55,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:04:55,586 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-15 09:04:55,586 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:04:55,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723897325] [2021-12-15 09:04:55,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723897325] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:04:55,587 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:04:55,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:04:55,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950296725] [2021-12-15 09:04:55,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:04:55,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:04:55,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:04:55,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:04:55,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:04:55,588 INFO L87 Difference]: Start difference. First operand 9409 states and 11329 transitions. Second operand has 3 states, 3 states have (on average 81.66666666666667) internal successors, (245), 2 states have internal predecessors, (245), 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) [2021-12-15 09:04:56,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:04:56,182 INFO L93 Difference]: Finished difference Result 22076 states and 26386 transitions. [2021-12-15 09:04:56,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:04:56,182 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 81.66666666666667) internal successors, (245), 2 states have internal predecessors, (245), 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 254 [2021-12-15 09:04:56,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:04:56,202 INFO L225 Difference]: With dead ends: 22076 [2021-12-15 09:04:56,203 INFO L226 Difference]: Without dead ends: 12669 [2021-12-15 09:04:56,213 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:04:56,216 INFO L933 BasicCegarLoop]: 147 mSDtfsCounter, 153 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 683 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 683 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 09:04:56,216 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 162 Invalid, 709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 683 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 09:04:56,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12669 states. [2021-12-15 09:04:56,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12669 to 12657. [2021-12-15 09:04:56,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12657 states, 12656 states have (on average 1.1836283185840708) internal successors, (14980), 12656 states have internal predecessors, (14980), 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) [2021-12-15 09:04:56,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12657 states to 12657 states and 14980 transitions. [2021-12-15 09:04:56,412 INFO L78 Accepts]: Start accepts. Automaton has 12657 states and 14980 transitions. Word has length 254 [2021-12-15 09:04:56,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:04:56,413 INFO L470 AbstractCegarLoop]: Abstraction has 12657 states and 14980 transitions. [2021-12-15 09:04:56,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.66666666666667) internal successors, (245), 2 states have internal predecessors, (245), 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) [2021-12-15 09:04:56,413 INFO L276 IsEmpty]: Start isEmpty. Operand 12657 states and 14980 transitions. [2021-12-15 09:04:56,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2021-12-15 09:04:56,421 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:04:56,421 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:04:56,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-15 09:04:56,422 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:04:56,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:04:56,423 INFO L85 PathProgramCache]: Analyzing trace with hash 125029868, now seen corresponding path program 1 times [2021-12-15 09:04:56,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:04:56,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734741334] [2021-12-15 09:04:56,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:04:56,423 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:04:56,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:04:56,547 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:04:56,547 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:04:56,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734741334] [2021-12-15 09:04:56,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734741334] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:04:56,548 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:04:56,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:04:56,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008985839] [2021-12-15 09:04:56,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:04:56,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:04:56,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:04:56,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:04:56,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:04:56,549 INFO L87 Difference]: Start difference. First operand 12657 states and 14980 transitions. Second operand has 3 states, 3 states have (on average 85.33333333333333) internal successors, (256), 2 states have internal predecessors, (256), 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) [2021-12-15 09:04:57,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:04:57,157 INFO L93 Difference]: Finished difference Result 25115 states and 29761 transitions. [2021-12-15 09:04:57,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:04:57,157 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 85.33333333333333) internal successors, (256), 2 states have internal predecessors, (256), 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 256 [2021-12-15 09:04:57,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:04:57,173 INFO L225 Difference]: With dead ends: 25115 [2021-12-15 09:04:57,174 INFO L226 Difference]: Without dead ends: 12460 [2021-12-15 09:04:57,185 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:04:57,186 INFO L933 BasicCegarLoop]: 111 mSDtfsCounter, 165 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 09:04:57,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 127 Invalid, 652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 09:04:57,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12460 states. [2021-12-15 09:04:57,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12460 to 12454. [2021-12-15 09:04:57,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12454 states, 12453 states have (on average 1.1549024331486388) internal successors, (14382), 12453 states have internal predecessors, (14382), 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) [2021-12-15 09:04:57,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12454 states to 12454 states and 14382 transitions. [2021-12-15 09:04:57,380 INFO L78 Accepts]: Start accepts. Automaton has 12454 states and 14382 transitions. Word has length 256 [2021-12-15 09:04:57,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:04:57,380 INFO L470 AbstractCegarLoop]: Abstraction has 12454 states and 14382 transitions. [2021-12-15 09:04:57,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.33333333333333) internal successors, (256), 2 states have internal predecessors, (256), 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) [2021-12-15 09:04:57,380 INFO L276 IsEmpty]: Start isEmpty. Operand 12454 states and 14382 transitions. [2021-12-15 09:04:57,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2021-12-15 09:04:57,404 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:04:57,404 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:04:57,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-15 09:04:57,405 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:04:57,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:04:57,405 INFO L85 PathProgramCache]: Analyzing trace with hash -1704134975, now seen corresponding path program 2 times [2021-12-15 09:04:57,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:04:57,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075379905] [2021-12-15 09:04:57,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:04:57,406 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:04:57,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:04:57,492 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 89 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-15 09:04:57,492 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:04:57,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075379905] [2021-12-15 09:04:57,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075379905] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:04:57,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747319327] [2021-12-15 09:04:57,493 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 09:04:57,493 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:04:57,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:04:57,505 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) [2021-12-15 09:04:57,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-15 09:04:57,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-15 09:04:57,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 09:04:57,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 09:04:57,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:04:58,027 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-12-15 09:04:58,027 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:04:58,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747319327] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:04:58,027 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:04:58,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2021-12-15 09:04:58,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210883002] [2021-12-15 09:04:58,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:04:58,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:04:58,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:04:58,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:04:58,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:04:58,029 INFO L87 Difference]: Start difference. First operand 12454 states and 14382 transitions. Second operand has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 2 states have internal predecessors, (184), 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) [2021-12-15 09:04:58,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:04:58,564 INFO L93 Difference]: Finished difference Result 24912 states and 28774 transitions. [2021-12-15 09:04:58,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:04:58,564 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 2 states have internal predecessors, (184), 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 261 [2021-12-15 09:04:58,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:04:58,581 INFO L225 Difference]: With dead ends: 24912 [2021-12-15 09:04:58,581 INFO L226 Difference]: Without dead ends: 12460 [2021-12-15 09:04:58,592 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 260 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:04:58,593 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 85 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 599 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 09:04:58,593 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 58 Invalid, 625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 599 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 09:04:58,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12460 states. [2021-12-15 09:04:58,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12460 to 12454. [2021-12-15 09:04:58,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12454 states, 12453 states have (on average 1.1534569983136593) internal successors, (14364), 12453 states have internal predecessors, (14364), 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) [2021-12-15 09:04:58,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12454 states to 12454 states and 14364 transitions. [2021-12-15 09:04:58,792 INFO L78 Accepts]: Start accepts. Automaton has 12454 states and 14364 transitions. Word has length 261 [2021-12-15 09:04:58,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:04:58,793 INFO L470 AbstractCegarLoop]: Abstraction has 12454 states and 14364 transitions. [2021-12-15 09:04:58,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 2 states have internal predecessors, (184), 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) [2021-12-15 09:04:58,793 INFO L276 IsEmpty]: Start isEmpty. Operand 12454 states and 14364 transitions. [2021-12-15 09:04:58,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2021-12-15 09:04:58,800 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:04:58,800 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:04:58,817 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-15 09:04:59,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:04:59,018 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:04:59,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:04:59,018 INFO L85 PathProgramCache]: Analyzing trace with hash 562659126, now seen corresponding path program 1 times [2021-12-15 09:04:59,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:04:59,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62477979] [2021-12-15 09:04:59,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:04:59,019 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:04:59,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:04:59,097 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 106 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-15 09:04:59,098 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:04:59,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62477979] [2021-12-15 09:04:59,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62477979] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:04:59,098 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:04:59,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:04:59,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723139446] [2021-12-15 09:04:59,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:04:59,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:04:59,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:04:59,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:04:59,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:04:59,100 INFO L87 Difference]: Start difference. First operand 12454 states and 14364 transitions. Second operand has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 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) [2021-12-15 09:04:59,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:04:59,846 INFO L93 Difference]: Finished difference Result 26339 states and 30528 transitions. [2021-12-15 09:04:59,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:04:59,847 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 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 271 [2021-12-15 09:04:59,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:04:59,864 INFO L225 Difference]: With dead ends: 26339 [2021-12-15 09:04:59,864 INFO L226 Difference]: Without dead ends: 13887 [2021-12-15 09:04:59,873 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 [2021-12-15 09:04:59,873 INFO L933 BasicCegarLoop]: 326 mSDtfsCounter, 135 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 09:04:59,874 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 343 Invalid, 661 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 548 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 09:04:59,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13887 states. [2021-12-15 09:04:59,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13887 to 13885. [2021-12-15 09:05:00,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13885 states, 13884 states have (on average 1.1449870354364737) internal successors, (15897), 13884 states have internal predecessors, (15897), 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) [2021-12-15 09:05:00,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13885 states to 13885 states and 15897 transitions. [2021-12-15 09:05:00,017 INFO L78 Accepts]: Start accepts. Automaton has 13885 states and 15897 transitions. Word has length 271 [2021-12-15 09:05:00,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:05:00,018 INFO L470 AbstractCegarLoop]: Abstraction has 13885 states and 15897 transitions. [2021-12-15 09:05:00,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 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) [2021-12-15 09:05:00,018 INFO L276 IsEmpty]: Start isEmpty. Operand 13885 states and 15897 transitions. [2021-12-15 09:05:00,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2021-12-15 09:05:00,028 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:05:00,028 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:05:00,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-15 09:05:00,028 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:05:00,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:05:00,029 INFO L85 PathProgramCache]: Analyzing trace with hash 1112047954, now seen corresponding path program 1 times [2021-12-15 09:05:00,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:05:00,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694944762] [2021-12-15 09:05:00,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:05:00,029 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:05:00,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:05:00,094 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-12-15 09:05:00,094 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:05:00,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694944762] [2021-12-15 09:05:00,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694944762] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:05:00,094 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:05:00,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:05:00,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550631270] [2021-12-15 09:05:00,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:05:00,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:05:00,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:05:00,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:05:00,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:05:00,098 INFO L87 Difference]: Start difference. First operand 13885 states and 15897 transitions. Second operand has 3 states, 3 states have (on average 69.0) internal successors, (207), 2 states have internal predecessors, (207), 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) [2021-12-15 09:05:00,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:05:00,893 INFO L93 Difference]: Finished difference Result 40585 states and 46575 transitions. [2021-12-15 09:05:00,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:05:00,893 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 69.0) internal successors, (207), 2 states have internal predecessors, (207), 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 284 [2021-12-15 09:05:00,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:05:00,935 INFO L225 Difference]: With dead ends: 40585 [2021-12-15 09:05:00,936 INFO L226 Difference]: Without dead ends: 26702 [2021-12-15 09:05:00,950 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:05:00,951 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 208 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 598 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-15 09:05:00,951 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 104 Invalid, 701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 598 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-15 09:05:00,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26702 states. [2021-12-15 09:05:01,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26702 to 25472. [2021-12-15 09:05:01,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25472 states, 25471 states have (on average 1.1307369164932668) internal successors, (28801), 25471 states have internal predecessors, (28801), 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) [2021-12-15 09:05:01,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25472 states to 25472 states and 28801 transitions. [2021-12-15 09:05:01,290 INFO L78 Accepts]: Start accepts. Automaton has 25472 states and 28801 transitions. Word has length 284 [2021-12-15 09:05:01,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:05:01,290 INFO L470 AbstractCegarLoop]: Abstraction has 25472 states and 28801 transitions. [2021-12-15 09:05:01,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.0) internal successors, (207), 2 states have internal predecessors, (207), 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) [2021-12-15 09:05:01,291 INFO L276 IsEmpty]: Start isEmpty. Operand 25472 states and 28801 transitions. [2021-12-15 09:05:01,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2021-12-15 09:05:01,301 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:05:01,302 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:05:01,302 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-15 09:05:01,302 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:05:01,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:05:01,303 INFO L85 PathProgramCache]: Analyzing trace with hash 765710523, now seen corresponding path program 1 times [2021-12-15 09:05:01,303 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:05:01,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787273902] [2021-12-15 09:05:01,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:05:01,303 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:05:01,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:05:01,397 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 138 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:05:01,398 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:05:01,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787273902] [2021-12-15 09:05:01,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787273902] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:05:01,398 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:05:01,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:05:01,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485817072] [2021-12-15 09:05:01,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:05:01,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:05:01,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:05:01,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:05:01,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:05:01,400 INFO L87 Difference]: Start difference. First operand 25472 states and 28801 transitions. Second operand has 4 states, 4 states have (on average 71.75) internal successors, (287), 3 states have internal predecessors, (287), 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) [2021-12-15 09:05:02,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:05:02,475 INFO L93 Difference]: Finished difference Result 52791 states and 59938 transitions. [2021-12-15 09:05:02,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:05:02,476 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 71.75) internal successors, (287), 3 states have internal predecessors, (287), 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 287 [2021-12-15 09:05:02,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:05:02,542 INFO L225 Difference]: With dead ends: 52791 [2021-12-15 09:05:02,542 INFO L226 Difference]: Without dead ends: 28336 [2021-12-15 09:05:02,560 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:05:02,560 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 342 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1077 mSolverCounterSat, 241 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 342 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 1318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 241 IncrementalHoareTripleChecker+Valid, 1077 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-15 09:05:02,561 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [342 Valid, 118 Invalid, 1318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [241 Valid, 1077 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-15 09:05:02,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28336 states. [2021-12-15 09:05:02,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28336 to 25472. [2021-12-15 09:05:02,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25472 states, 25471 states have (on average 1.1307369164932668) internal successors, (28801), 25471 states have internal predecessors, (28801), 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) [2021-12-15 09:05:02,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25472 states to 25472 states and 28801 transitions. [2021-12-15 09:05:02,876 INFO L78 Accepts]: Start accepts. Automaton has 25472 states and 28801 transitions. Word has length 287 [2021-12-15 09:05:02,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:05:02,877 INFO L470 AbstractCegarLoop]: Abstraction has 25472 states and 28801 transitions. [2021-12-15 09:05:02,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 71.75) internal successors, (287), 3 states have internal predecessors, (287), 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) [2021-12-15 09:05:02,877 INFO L276 IsEmpty]: Start isEmpty. Operand 25472 states and 28801 transitions. [2021-12-15 09:05:02,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2021-12-15 09:05:02,888 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:05:02,888 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:05:02,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-15 09:05:02,889 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:05:02,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:05:02,889 INFO L85 PathProgramCache]: Analyzing trace with hash 1380533368, now seen corresponding path program 1 times [2021-12-15 09:05:02,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:05:02,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048760683] [2021-12-15 09:05:02,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:05:02,890 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:05:02,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:05:02,960 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 74 proven. 6 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-12-15 09:05:02,960 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:05:02,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048760683] [2021-12-15 09:05:02,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048760683] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:05:02,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256124144] [2021-12-15 09:05:02,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:05:02,961 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:05:02,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:05:02,976 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) [2021-12-15 09:05:02,977 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-15 09:05:03,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:05:03,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 541 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-15 09:05:03,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:05:03,468 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 108 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-12-15 09:05:03,468 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:05:03,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256124144] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:05:03,468 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:05:03,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-15 09:05:03,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024906637] [2021-12-15 09:05:03,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:05:03,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:05:03,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:05:03,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:05:03,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:05:03,481 INFO L87 Difference]: Start difference. First operand 25472 states and 28801 transitions. Second operand has 3 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 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) [2021-12-15 09:05:04,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:05:04,130 INFO L93 Difference]: Finished difference Result 62322 states and 70843 transitions. [2021-12-15 09:05:04,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:05:04,130 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 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 289 [2021-12-15 09:05:04,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:05:04,172 INFO L225 Difference]: With dead ends: 62322 [2021-12-15 09:05:04,173 INFO L226 Difference]: Without dead ends: 37258 [2021-12-15 09:05:04,194 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 288 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:05:04,195 INFO L933 BasicCegarLoop]: 312 mSDtfsCounter, 81 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 515 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 09:05:04,195 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 328 Invalid, 663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 515 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 09:05:04,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37258 states. [2021-12-15 09:05:04,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37258 to 37045. [2021-12-15 09:05:04,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37045 states, 37044 states have (on average 1.1132167152575316) internal successors, (41238), 37044 states have internal predecessors, (41238), 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) [2021-12-15 09:05:04,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37045 states to 37045 states and 41238 transitions. [2021-12-15 09:05:04,669 INFO L78 Accepts]: Start accepts. Automaton has 37045 states and 41238 transitions. Word has length 289 [2021-12-15 09:05:04,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:05:04,670 INFO L470 AbstractCegarLoop]: Abstraction has 37045 states and 41238 transitions. [2021-12-15 09:05:04,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 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) [2021-12-15 09:05:04,670 INFO L276 IsEmpty]: Start isEmpty. Operand 37045 states and 41238 transitions. [2021-12-15 09:05:04,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2021-12-15 09:05:04,685 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:05:04,686 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:05:04,704 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-15 09:05:04,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-15 09:05:04,904 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:05:04,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:05:04,905 INFO L85 PathProgramCache]: Analyzing trace with hash -887745360, now seen corresponding path program 1 times [2021-12-15 09:05:04,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:05:04,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727131524] [2021-12-15 09:05:04,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:05:04,905 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:05:04,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:05:04,985 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 74 proven. 6 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-12-15 09:05:04,985 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:05:04,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727131524] [2021-12-15 09:05:04,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727131524] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:05:04,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797908954] [2021-12-15 09:05:04,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:05:04,986 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:05:04,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:05:04,987 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) [2021-12-15 09:05:05,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-15 09:05:05,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:05:05,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 09:05:05,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:05:05,539 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 115 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-12-15 09:05:05,540 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:05:05,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797908954] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:05:05,540 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:05:05,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-15 09:05:05,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853953874] [2021-12-15 09:05:05,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:05:05,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:05:05,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:05:05,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:05:05,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:05:05,542 INFO L87 Difference]: Start difference. First operand 37045 states and 41238 transitions. Second operand has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 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) [2021-12-15 09:05:06,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:05:06,405 INFO L93 Difference]: Finished difference Result 92188 states and 103282 transitions. [2021-12-15 09:05:06,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:05:06,405 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 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 294 [2021-12-15 09:05:06,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:05:06,490 INFO L225 Difference]: With dead ends: 92188 [2021-12-15 09:05:06,491 INFO L226 Difference]: Without dead ends: 56160 [2021-12-15 09:05:06,514 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 293 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:05:06,515 INFO L933 BasicCegarLoop]: 138 mSDtfsCounter, 53 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 627 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 627 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 09:05:06,515 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 165 Invalid, 663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 627 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 09:05:06,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56160 states. [2021-12-15 09:05:07,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56160 to 46182. [2021-12-15 09:05:07,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46182 states, 46181 states have (on average 1.1283861328251878) internal successors, (52110), 46181 states have internal predecessors, (52110), 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) [2021-12-15 09:05:07,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46182 states to 46182 states and 52110 transitions. [2021-12-15 09:05:07,211 INFO L78 Accepts]: Start accepts. Automaton has 46182 states and 52110 transitions. Word has length 294 [2021-12-15 09:05:07,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:05:07,211 INFO L470 AbstractCegarLoop]: Abstraction has 46182 states and 52110 transitions. [2021-12-15 09:05:07,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 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) [2021-12-15 09:05:07,211 INFO L276 IsEmpty]: Start isEmpty. Operand 46182 states and 52110 transitions. [2021-12-15 09:05:07,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 356 [2021-12-15 09:05:07,231 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:05:07,232 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:05:07,252 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-15 09:05:07,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-15 09:05:07,452 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:05:07,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:05:07,453 INFO L85 PathProgramCache]: Analyzing trace with hash 1822467724, now seen corresponding path program 1 times [2021-12-15 09:05:07,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:05:07,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427840398] [2021-12-15 09:05:07,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:05:07,453 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:05:07,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:05:07,541 INFO L134 CoverageAnalysis]: Checked inductivity of 419 backedges. 155 proven. 6 refuted. 0 times theorem prover too weak. 258 trivial. 0 not checked. [2021-12-15 09:05:07,541 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:05:07,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427840398] [2021-12-15 09:05:07,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427840398] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:05:07,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363659391] [2021-12-15 09:05:07,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:05:07,542 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:05:07,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:05:07,543 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) [2021-12-15 09:05:07,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-15 09:05:07,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:05:07,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 722 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 09:05:07,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:05:07,985 INFO L134 CoverageAnalysis]: Checked inductivity of 419 backedges. 250 proven. 0 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-12-15 09:05:07,985 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:05:07,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363659391] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:05:07,986 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:05:07,986 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-15 09:05:07,986 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040992659] [2021-12-15 09:05:07,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:05:07,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:05:07,987 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:05:07,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:05:07,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:05:07,988 INFO L87 Difference]: Start difference. First operand 46182 states and 52110 transitions. Second operand has 3 states, 3 states have (on average 76.66666666666667) internal successors, (230), 3 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:05:08,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:05:08,881 INFO L93 Difference]: Finished difference Result 102323 states and 116919 transitions. [2021-12-15 09:05:08,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:05:08,882 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 76.66666666666667) internal successors, (230), 3 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 355 [2021-12-15 09:05:08,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:05:08,945 INFO L225 Difference]: With dead ends: 102323 [2021-12-15 09:05:08,946 INFO L226 Difference]: Without dead ends: 57564 [2021-12-15 09:05:08,976 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 354 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:05:08,978 INFO L933 BasicCegarLoop]: 114 mSDtfsCounter, 220 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 09:05:08,978 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 134 Invalid, 674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 09:05:09,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57564 states. [2021-12-15 09:05:09,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57564 to 55114. [2021-12-15 09:05:09,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55114 states, 55113 states have (on average 1.113929562898046) internal successors, (61392), 55113 states have internal predecessors, (61392), 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) [2021-12-15 09:05:09,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55114 states to 55114 states and 61392 transitions. [2021-12-15 09:05:09,808 INFO L78 Accepts]: Start accepts. Automaton has 55114 states and 61392 transitions. Word has length 355 [2021-12-15 09:05:09,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:05:09,808 INFO L470 AbstractCegarLoop]: Abstraction has 55114 states and 61392 transitions. [2021-12-15 09:05:09,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.66666666666667) internal successors, (230), 3 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:05:09,809 INFO L276 IsEmpty]: Start isEmpty. Operand 55114 states and 61392 transitions. [2021-12-15 09:05:09,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 403 [2021-12-15 09:05:09,828 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:05:09,829 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:05:09,846 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-15 09:05:10,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-15 09:05:10,044 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:05:10,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:05:10,045 INFO L85 PathProgramCache]: Analyzing trace with hash -127625773, now seen corresponding path program 1 times [2021-12-15 09:05:10,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:05:10,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576094130] [2021-12-15 09:05:10,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:05:10,045 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:05:10,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:05:10,157 INFO L134 CoverageAnalysis]: Checked inductivity of 466 backedges. 148 proven. 6 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2021-12-15 09:05:10,157 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:05:10,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576094130] [2021-12-15 09:05:10,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576094130] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:05:10,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853105742] [2021-12-15 09:05:10,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:05:10,158 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:05:10,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:05:10,173 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) [2021-12-15 09:05:10,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-15 09:05:10,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:05:10,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 724 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-15 09:05:10,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:05:11,082 INFO L134 CoverageAnalysis]: Checked inductivity of 466 backedges. 352 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-12-15 09:05:11,082 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:05:11,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853105742] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:05:11,082 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:05:11,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-15 09:05:11,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207108585] [2021-12-15 09:05:11,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:05:11,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:05:11,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:05:11,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:05:11,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:05:11,084 INFO L87 Difference]: Start difference. First operand 55114 states and 61392 transitions. Second operand has 3 states, 3 states have (on average 111.33333333333333) internal successors, (334), 3 states have internal predecessors, (334), 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) [2021-12-15 09:05:11,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:05:11,999 INFO L93 Difference]: Finished difference Result 119991 states and 133659 transitions. [2021-12-15 09:05:11,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:05:11,999 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 111.33333333333333) internal successors, (334), 3 states have internal predecessors, (334), 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 402 [2021-12-15 09:05:12,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:05:12,082 INFO L225 Difference]: With dead ends: 119991 [2021-12-15 09:05:12,083 INFO L226 Difference]: Without dead ends: 65488 [2021-12-15 09:05:12,113 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 404 GetRequests, 401 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:05:12,114 INFO L933 BasicCegarLoop]: 120 mSDtfsCounter, 163 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 596 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 09:05:12,114 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 135 Invalid, 667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 596 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 09:05:12,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65488 states. [2021-12-15 09:05:12,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65488 to 65276. [2021-12-15 09:05:12,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65276 states, 65275 states have (on average 1.1030256606664113) internal successors, (72000), 65275 states have internal predecessors, (72000), 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) [2021-12-15 09:05:13,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65276 states to 65276 states and 72000 transitions. [2021-12-15 09:05:13,057 INFO L78 Accepts]: Start accepts. Automaton has 65276 states and 72000 transitions. Word has length 402 [2021-12-15 09:05:13,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:05:13,058 INFO L470 AbstractCegarLoop]: Abstraction has 65276 states and 72000 transitions. [2021-12-15 09:05:13,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 111.33333333333333) internal successors, (334), 3 states have internal predecessors, (334), 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) [2021-12-15 09:05:13,058 INFO L276 IsEmpty]: Start isEmpty. Operand 65276 states and 72000 transitions. [2021-12-15 09:05:13,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 469 [2021-12-15 09:05:13,090 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:05:13,091 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:05:13,107 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-15 09:05:13,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:05:13,308 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:05:13,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:05:13,308 INFO L85 PathProgramCache]: Analyzing trace with hash -546314285, now seen corresponding path program 1 times [2021-12-15 09:05:13,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:05:13,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189711548] [2021-12-15 09:05:13,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:05:13,309 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:05:13,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:05:13,428 INFO L134 CoverageAnalysis]: Checked inductivity of 727 backedges. 185 proven. 6 refuted. 0 times theorem prover too weak. 536 trivial. 0 not checked. [2021-12-15 09:05:13,429 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:05:13,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189711548] [2021-12-15 09:05:13,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189711548] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:05:13,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968227487] [2021-12-15 09:05:13,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:05:13,429 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:05:13,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:05:13,431 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 09:05:13,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-15 09:05:13,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:05:13,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 831 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-15 09:05:13,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:05:14,492 INFO L134 CoverageAnalysis]: Checked inductivity of 727 backedges. 418 proven. 137 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2021-12-15 09:05:14,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 09:05:15,216 INFO L134 CoverageAnalysis]: Checked inductivity of 727 backedges. 418 proven. 137 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2021-12-15 09:05:15,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968227487] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 09:05:15,216 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 09:05:15,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2021-12-15 09:05:15,217 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725042195] [2021-12-15 09:05:15,217 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 09:05:15,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-15 09:05:15,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:05:15,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-15 09:05:15,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-15 09:05:15,221 INFO L87 Difference]: Start difference. First operand 65276 states and 72000 transitions. Second operand has 6 states, 6 states have (on average 64.16666666666667) internal successors, (385), 5 states have internal predecessors, (385), 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) [2021-12-15 09:05:18,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:05:18,233 INFO L93 Difference]: Finished difference Result 271079 states and 299308 transitions. [2021-12-15 09:05:18,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-15 09:05:18,234 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 64.16666666666667) internal successors, (385), 5 states have internal predecessors, (385), 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 468 [2021-12-15 09:05:18,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:05:18,679 INFO L225 Difference]: With dead ends: 271079 [2021-12-15 09:05:18,680 INFO L226 Difference]: Without dead ends: 205805 [2021-12-15 09:05:18,715 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 948 GetRequests, 932 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-12-15 09:05:18,715 INFO L933 BasicCegarLoop]: 154 mSDtfsCounter, 3822 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 2727 mSolverCounterSat, 1250 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3822 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 3977 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1250 IncrementalHoareTripleChecker+Valid, 2727 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-15 09:05:18,716 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3822 Valid, 303 Invalid, 3977 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1250 Valid, 2727 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-15 09:05:18,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205805 states. [2021-12-15 09:05:20,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205805 to 185446. [2021-12-15 09:05:21,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185446 states, 185445 states have (on average 1.1009679419774057) internal successors, (204169), 185445 states have internal predecessors, (204169), 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) [2021-12-15 09:05:21,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185446 states to 185446 states and 204169 transitions. [2021-12-15 09:05:21,236 INFO L78 Accepts]: Start accepts. Automaton has 185446 states and 204169 transitions. Word has length 468 [2021-12-15 09:05:21,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:05:21,236 INFO L470 AbstractCegarLoop]: Abstraction has 185446 states and 204169 transitions. [2021-12-15 09:05:21,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 64.16666666666667) internal successors, (385), 5 states have internal predecessors, (385), 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) [2021-12-15 09:05:21,237 INFO L276 IsEmpty]: Start isEmpty. Operand 185446 states and 204169 transitions. [2021-12-15 09:05:21,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 521 [2021-12-15 09:05:21,281 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:05:21,282 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:05:21,303 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-15 09:05:21,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:05:21,496 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:05:21,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:05:21,496 INFO L85 PathProgramCache]: Analyzing trace with hash 421184153, now seen corresponding path program 1 times [2021-12-15 09:05:21,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:05:21,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130800451] [2021-12-15 09:05:21,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:05:21,497 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:05:22,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:05:22,118 INFO L134 CoverageAnalysis]: Checked inductivity of 619 backedges. 359 proven. 9 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2021-12-15 09:05:22,119 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:05:22,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130800451] [2021-12-15 09:05:22,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130800451] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:05:22,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880977612] [2021-12-15 09:05:22,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:05:22,119 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:05:22,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:05:22,120 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 09:05:22,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-15 09:05:22,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:05:22,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 847 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 09:05:22,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:05:22,952 INFO L134 CoverageAnalysis]: Checked inductivity of 619 backedges. 548 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-12-15 09:05:22,953 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:05:22,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880977612] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:05:22,953 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:05:22,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-15 09:05:22,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776445956] [2021-12-15 09:05:22,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:05:22,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:05:22,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:05:22,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:05:22,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:05:22,955 INFO L87 Difference]: Start difference. First operand 185446 states and 204169 transitions. Second operand has 3 states, 3 states have (on average 151.66666666666666) internal successors, (455), 3 states have internal predecessors, (455), 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) [2021-12-15 09:05:24,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:05:24,650 INFO L93 Difference]: Finished difference Result 435387 states and 480202 transitions. [2021-12-15 09:05:24,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:05:24,650 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 151.66666666666666) internal successors, (455), 3 states have internal predecessors, (455), 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 520 [2021-12-15 09:05:24,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:05:25,069 INFO L225 Difference]: With dead ends: 435387 [2021-12-15 09:05:25,069 INFO L226 Difference]: Without dead ends: 250349 [2021-12-15 09:05:25,134 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 522 GetRequests, 519 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:05:25,136 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 124 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 592 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-15 09:05:25,136 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 117 Invalid, 663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 592 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-15 09:05:25,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250349 states. [2021-12-15 09:05:28,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250349 to 246244. [2021-12-15 09:05:28,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246244 states, 246243 states have (on average 1.0972819531925782) internal successors, (270198), 246243 states have internal predecessors, (270198), 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) [2021-12-15 09:05:29,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246244 states to 246244 states and 270198 transitions. [2021-12-15 09:05:29,171 INFO L78 Accepts]: Start accepts. Automaton has 246244 states and 270198 transitions. Word has length 520 [2021-12-15 09:05:29,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:05:29,172 INFO L470 AbstractCegarLoop]: Abstraction has 246244 states and 270198 transitions. [2021-12-15 09:05:29,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 151.66666666666666) internal successors, (455), 3 states have internal predecessors, (455), 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) [2021-12-15 09:05:29,172 INFO L276 IsEmpty]: Start isEmpty. Operand 246244 states and 270198 transitions. [2021-12-15 09:05:29,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 525 [2021-12-15 09:05:29,242 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:05:29,243 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:05:29,260 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-15 09:05:29,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:05:29,456 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:05:29,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:05:29,456 INFO L85 PathProgramCache]: Analyzing trace with hash -100031726, now seen corresponding path program 1 times [2021-12-15 09:05:29,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:05:29,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397806100] [2021-12-15 09:05:29,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:05:29,456 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:05:29,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:05:29,685 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 582 proven. 18 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-12-15 09:05:29,685 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:05:29,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397806100] [2021-12-15 09:05:29,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397806100] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:05:29,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007152386] [2021-12-15 09:05:29,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:05:29,686 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:05:29,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:05:29,687 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 09:05:29,688 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-15 09:05:29,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:05:29,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 860 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-15 09:05:29,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:05:30,613 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 343 proven. 0 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2021-12-15 09:05:30,614 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:05:30,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007152386] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:05:30,614 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:05:30,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-12-15 09:05:30,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854913893] [2021-12-15 09:05:30,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:05:30,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:05:30,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:05:30,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:05:30,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-15 09:05:30,616 INFO L87 Difference]: Start difference. First operand 246244 states and 270198 transitions. Second operand has 3 states, 3 states have (on average 105.33333333333333) internal successors, (316), 3 states have internal predecessors, (316), 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) [2021-12-15 09:05:32,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:05:32,462 INFO L93 Difference]: Finished difference Result 438844 states and 480509 transitions. [2021-12-15 09:05:32,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:05:32,463 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 105.33333333333333) internal successors, (316), 3 states have internal predecessors, (316), 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 524 [2021-12-15 09:05:32,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:05:32,464 INFO L225 Difference]: With dead ends: 438844 [2021-12-15 09:05:32,464 INFO L226 Difference]: Without dead ends: 0 [2021-12-15 09:05:32,954 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 527 GetRequests, 523 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-15 09:05:32,954 INFO L933 BasicCegarLoop]: 305 mSDtfsCounter, 74 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 553 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-15 09:05:32,955 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 325 Invalid, 635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 553 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-15 09:05:32,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-12-15 09:05:32,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-12-15 09:05:32,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 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) [2021-12-15 09:05:32,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-12-15 09:05:32,956 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 524 [2021-12-15 09:05:32,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:05:32,956 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-15 09:05:32,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 105.33333333333333) internal successors, (316), 3 states have internal predecessors, (316), 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) [2021-12-15 09:05:32,956 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-12-15 09:05:32,956 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-12-15 09:05:32,958 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-15 09:05:33,002 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-15 09:05:33,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-12-15 09:05:33,173 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.