./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem12_label59.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/eca-rers2012/Problem12_label59.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 51dcd89c10622c543bf9ef783ec22401c3170140113dd2b2907b165950bd75af --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 11:04:35,336 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 11:04:35,338 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 11:04:35,399 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 11:04:35,400 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 11:04:35,401 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 11:04:35,402 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 11:04:35,403 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 11:04:35,419 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 11:04:35,420 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 11:04:35,420 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 11:04:35,421 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 11:04:35,422 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 11:04:35,422 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 11:04:35,423 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 11:04:35,424 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 11:04:35,424 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 11:04:35,425 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 11:04:35,426 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 11:04:35,427 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 11:04:35,428 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 11:04:35,429 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 11:04:35,430 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 11:04:35,433 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 11:04:35,434 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 11:04:35,439 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 11:04:35,439 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 11:04:35,440 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 11:04:35,441 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 11:04:35,441 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 11:04:35,441 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 11:04:35,442 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 11:04:35,442 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 11:04:35,443 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 11:04:35,444 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 11:04:35,445 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 11:04:35,448 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 11:04:35,448 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 11:04:35,448 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 11:04:35,449 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 11:04:35,449 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 11:04:35,451 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 11:04:35,473 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 11:04:35,475 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 11:04:35,475 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 11:04:35,476 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 11:04:35,476 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 11:04:35,476 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 11:04:35,477 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 11:04:35,477 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 11:04:35,477 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 11:04:35,477 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 11:04:35,478 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 11:04:35,478 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 11:04:35,478 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 11:04:35,479 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 11:04:35,479 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 11:04:35,479 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 11:04:35,479 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 11:04:35,479 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 11:04:35,479 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 11:04:35,479 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 11:04:35,480 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 11:04:35,480 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 11:04:35,480 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 11:04:35,480 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 11:04:35,480 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 11:04:35,480 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 11:04:35,480 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 11:04:35,481 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 11:04:35,482 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 11:04:35,482 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 11:04:35,482 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 11:04:35,482 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 11:04:35,482 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 11:04:35,482 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 11:04:35,483 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 51dcd89c10622c543bf9ef783ec22401c3170140113dd2b2907b165950bd75af [2021-12-21 11:04:35,629 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 11:04:35,644 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 11:04:35,646 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 11:04:35,646 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 11:04:35,647 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 11:04:35,648 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem12_label59.c [2021-12-21 11:04:35,702 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6a5b19678/3e46d25c811f41ccbe5c77a646395f5c/FLAG4304b1085 [2021-12-21 11:04:36,243 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 11:04:36,244 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label59.c [2021-12-21 11:04:36,268 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6a5b19678/3e46d25c811f41ccbe5c77a646395f5c/FLAG4304b1085 [2021-12-21 11:04:36,717 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6a5b19678/3e46d25c811f41ccbe5c77a646395f5c [2021-12-21 11:04:36,719 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 11:04:36,720 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 11:04:36,721 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 11:04:36,721 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 11:04:36,723 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 11:04:36,724 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 11:04:36" (1/1) ... [2021-12-21 11:04:36,724 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b34646 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:04:36, skipping insertion in model container [2021-12-21 11:04:36,724 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 11:04:36" (1/1) ... [2021-12-21 11:04:36,729 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 11:04:36,799 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 11:04:36,963 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/Problem12_label59.c[5577,5590] [2021-12-21 11:04:37,787 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 11:04:37,813 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 11:04:37,859 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/Problem12_label59.c[5577,5590] [2021-12-21 11:04:38,423 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 11:04:38,438 INFO L208 MainTranslator]: Completed translation [2021-12-21 11:04:38,438 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:04:38 WrapperNode [2021-12-21 11:04:38,438 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 11:04:38,440 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 11:04:38,440 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 11:04:38,440 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 11:04:38,444 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:04:38" (1/1) ... [2021-12-21 11:04:38,480 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:04:38" (1/1) ... [2021-12-21 11:04:38,750 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 4757 [2021-12-21 11:04:38,751 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 11:04:38,752 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 11:04:38,752 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 11:04:38,752 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 11:04:38,758 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:04:38" (1/1) ... [2021-12-21 11:04:38,758 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:04:38" (1/1) ... [2021-12-21 11:04:38,796 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:04:38" (1/1) ... [2021-12-21 11:04:38,797 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:04:38" (1/1) ... [2021-12-21 11:04:38,962 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:04:38" (1/1) ... [2021-12-21 11:04:38,998 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:04:38" (1/1) ... [2021-12-21 11:04:39,015 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:04:38" (1/1) ... [2021-12-21 11:04:39,144 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 11:04:39,145 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 11:04:39,146 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 11:04:39,146 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 11:04:39,160 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:04:38" (1/1) ... [2021-12-21 11:04:39,166 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 11:04:39,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 11:04:39,185 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-21 11:04:39,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-21 11:04:39,240 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 11:04:39,241 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 11:04:39,241 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 11:04:39,241 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 11:04:39,323 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 11:04:39,324 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 11:04:42,005 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 11:04:42,015 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 11:04:42,015 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-21 11:04:42,017 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 11:04:42 BoogieIcfgContainer [2021-12-21 11:04:42,017 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 11:04:42,018 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 11:04:42,018 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 11:04:42,021 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 11:04:42,021 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 11:04:36" (1/3) ... [2021-12-21 11:04:42,021 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4af32b05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 11:04:42, skipping insertion in model container [2021-12-21 11:04:42,022 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:04:38" (2/3) ... [2021-12-21 11:04:42,022 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4af32b05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 11:04:42, skipping insertion in model container [2021-12-21 11:04:42,022 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 11:04:42" (3/3) ... [2021-12-21 11:04:42,023 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem12_label59.c [2021-12-21 11:04:42,026 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 11:04:42,026 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 11:04:42,056 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 11:04:42,060 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-21 11:04:42,060 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 11:04:42,077 INFO L276 IsEmpty]: Start isEmpty. Operand has 818 states, 816 states have (on average 1.9178921568627452) internal successors, (1565), 817 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:04:42,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-21 11:04:42,081 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:04:42,081 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] [2021-12-21 11:04:42,082 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:04:42,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:04:42,085 INFO L85 PathProgramCache]: Analyzing trace with hash 626000386, now seen corresponding path program 1 times [2021-12-21 11:04:42,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:04:42,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108340049] [2021-12-21 11:04:42,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:04:42,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:04:42,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:04:42,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 11:04:42,229 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:04:42,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108340049] [2021-12-21 11:04:42,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108340049] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:04:42,230 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:04:42,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 11:04:42,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170951906] [2021-12-21 11:04:42,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:04:42,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:04:42,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:04:42,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:04:42,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:04:42,253 INFO L87 Difference]: Start difference. First operand has 818 states, 816 states have (on average 1.9178921568627452) internal successors, (1565), 817 states have internal predecessors, (1565), 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 14.666666666666666) internal successors, (44), 2 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:04:45,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:04:45,125 INFO L93 Difference]: Finished difference Result 2388 states and 4629 transitions. [2021-12-21 11:04:45,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:04:45,128 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 2 states have internal predecessors, (44), 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 44 [2021-12-21 11:04:45,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:04:45,143 INFO L225 Difference]: With dead ends: 2388 [2021-12-21 11:04:45,143 INFO L226 Difference]: Without dead ends: 1506 [2021-12-21 11:04:45,148 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 [2021-12-21 11:04:45,150 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 792 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 2500 mSolverCounterSat, 764 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 792 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 3264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 764 IncrementalHoareTripleChecker+Valid, 2500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-21 11:04:45,151 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [792 Valid, 112 Invalid, 3264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [764 Valid, 2500 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-12-21 11:04:45,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1506 states. [2021-12-21 11:04:45,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1506 to 1506. [2021-12-21 11:04:45,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1506 states, 1505 states have (on average 1.86578073089701) internal successors, (2808), 1505 states have internal predecessors, (2808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:04:45,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1506 states to 1506 states and 2808 transitions. [2021-12-21 11:04:45,222 INFO L78 Accepts]: Start accepts. Automaton has 1506 states and 2808 transitions. Word has length 44 [2021-12-21 11:04:45,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:04:45,223 INFO L470 AbstractCegarLoop]: Abstraction has 1506 states and 2808 transitions. [2021-12-21 11:04:45,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 2 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:04:45,223 INFO L276 IsEmpty]: Start isEmpty. Operand 1506 states and 2808 transitions. [2021-12-21 11:04:45,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-12-21 11:04:45,225 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:04:45,225 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:04:45,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 11:04:45,226 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:04:45,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:04:45,227 INFO L85 PathProgramCache]: Analyzing trace with hash 606861728, now seen corresponding path program 1 times [2021-12-21 11:04:45,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:04:45,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716826752] [2021-12-21 11:04:45,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:04:45,227 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:04:45,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:04:45,358 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 11:04:45,359 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:04:45,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716826752] [2021-12-21 11:04:45,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716826752] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:04:45,359 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:04:45,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:04:45,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013408267] [2021-12-21 11:04:45,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:04:45,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 11:04:45,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:04:45,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 11:04:45,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 11:04:45,361 INFO L87 Difference]: Start difference. First operand 1506 states and 2808 transitions. Second operand has 4 states, 4 states have (on average 27.25) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:04:49,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:04:49,462 INFO L93 Difference]: Finished difference Result 5271 states and 9796 transitions. [2021-12-21 11:04:49,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 11:04:49,462 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 3 states have internal predecessors, (109), 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 109 [2021-12-21 11:04:49,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:04:49,473 INFO L225 Difference]: With dead ends: 5271 [2021-12-21 11:04:49,473 INFO L226 Difference]: Without dead ends: 3767 [2021-12-21 11:04:49,474 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 11:04:49,475 INFO L933 BasicCegarLoop]: 181 mSDtfsCounter, 2307 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 3612 mSolverCounterSat, 1534 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2307 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 5146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1534 IncrementalHoareTripleChecker+Valid, 3612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2021-12-21 11:04:49,476 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2307 Valid, 197 Invalid, 5146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1534 Valid, 3612 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2021-12-21 11:04:49,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3767 states. [2021-12-21 11:04:49,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3767 to 3759. [2021-12-21 11:04:49,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3759 states, 3758 states have (on average 1.6056412985630655) internal successors, (6034), 3758 states have internal predecessors, (6034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:04:49,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3759 states to 3759 states and 6034 transitions. [2021-12-21 11:04:49,532 INFO L78 Accepts]: Start accepts. Automaton has 3759 states and 6034 transitions. Word has length 109 [2021-12-21 11:04:49,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:04:49,533 INFO L470 AbstractCegarLoop]: Abstraction has 3759 states and 6034 transitions. [2021-12-21 11:04:49,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:04:49,533 INFO L276 IsEmpty]: Start isEmpty. Operand 3759 states and 6034 transitions. [2021-12-21 11:04:49,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-12-21 11:04:49,534 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:04:49,534 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:04:49,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 11:04:49,535 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:04:49,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:04:49,535 INFO L85 PathProgramCache]: Analyzing trace with hash 1014367121, now seen corresponding path program 1 times [2021-12-21 11:04:49,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:04:49,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181078831] [2021-12-21 11:04:49,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:04:49,536 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:04:49,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:04:49,633 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 11:04:49,633 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:04:49,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181078831] [2021-12-21 11:04:49,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181078831] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:04:49,634 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:04:49,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:04:49,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787911693] [2021-12-21 11:04:49,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:04:49,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 11:04:49,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:04:49,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 11:04:49,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 11:04:49,636 INFO L87 Difference]: Start difference. First operand 3759 states and 6034 transitions. Second operand has 4 states, 4 states have (on average 28.75) internal successors, (115), 3 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:04:53,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:04:53,038 INFO L93 Difference]: Finished difference Result 10559 states and 17378 transitions. [2021-12-21 11:04:53,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 11:04:53,038 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.75) internal successors, (115), 3 states have internal predecessors, (115), 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 115 [2021-12-21 11:04:53,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:04:53,070 INFO L225 Difference]: With dead ends: 10559 [2021-12-21 11:04:53,071 INFO L226 Difference]: Without dead ends: 6765 [2021-12-21 11:04:53,074 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 [2021-12-21 11:04:53,081 INFO L933 BasicCegarLoop]: 695 mSDtfsCounter, 692 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 3806 mSolverCounterSat, 663 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 692 SdHoareTripleChecker+Valid, 714 SdHoareTripleChecker+Invalid, 4469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 663 IncrementalHoareTripleChecker+Valid, 3806 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2021-12-21 11:04:53,082 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [692 Valid, 714 Invalid, 4469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [663 Valid, 3806 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2021-12-21 11:04:53,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6765 states. [2021-12-21 11:04:53,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6765 to 6763. [2021-12-21 11:04:53,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6763 states, 6762 states have (on average 1.357438627624963) internal successors, (9179), 6762 states have internal predecessors, (9179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:04:53,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6763 states to 6763 states and 9179 transitions. [2021-12-21 11:04:53,174 INFO L78 Accepts]: Start accepts. Automaton has 6763 states and 9179 transitions. Word has length 115 [2021-12-21 11:04:53,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:04:53,175 INFO L470 AbstractCegarLoop]: Abstraction has 6763 states and 9179 transitions. [2021-12-21 11:04:53,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.75) internal successors, (115), 3 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:04:53,176 INFO L276 IsEmpty]: Start isEmpty. Operand 6763 states and 9179 transitions. [2021-12-21 11:04:53,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2021-12-21 11:04:53,182 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:04:53,182 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:04:53,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 11:04:53,183 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:04:53,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:04:53,183 INFO L85 PathProgramCache]: Analyzing trace with hash 1293105368, now seen corresponding path program 1 times [2021-12-21 11:04:53,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:04:53,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587022886] [2021-12-21 11:04:53,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:04:53,184 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:04:53,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:04:53,294 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 11:04:53,296 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:04:53,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587022886] [2021-12-21 11:04:53,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587022886] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:04:53,297 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:04:53,297 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:04:53,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255689989] [2021-12-21 11:04:53,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:04:53,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:04:53,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:04:53,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:04:53,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:04:53,299 INFO L87 Difference]: Start difference. First operand 6763 states and 9179 transitions. Second operand has 3 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:04:55,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:04:55,852 INFO L93 Difference]: Finished difference Result 16528 states and 23482 transitions. [2021-12-21 11:04:55,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:04:55,875 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 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 189 [2021-12-21 11:04:55,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:04:55,896 INFO L225 Difference]: With dead ends: 16528 [2021-12-21 11:04:55,897 INFO L226 Difference]: Without dead ends: 9767 [2021-12-21 11:04:55,902 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:04:55,909 INFO L933 BasicCegarLoop]: 1350 mSDtfsCounter, 734 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2435 mSolverCounterSat, 489 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 734 SdHoareTripleChecker+Valid, 1358 SdHoareTripleChecker+Invalid, 2924 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 489 IncrementalHoareTripleChecker+Valid, 2435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-21 11:04:55,910 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [734 Valid, 1358 Invalid, 2924 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [489 Valid, 2435 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-21 11:04:55,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9767 states. [2021-12-21 11:04:56,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9767 to 9767. [2021-12-21 11:04:56,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9767 states, 9766 states have (on average 1.3271554372312102) internal successors, (12961), 9766 states have internal predecessors, (12961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:04:56,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9767 states to 9767 states and 12961 transitions. [2021-12-21 11:04:56,023 INFO L78 Accepts]: Start accepts. Automaton has 9767 states and 12961 transitions. Word has length 189 [2021-12-21 11:04:56,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:04:56,025 INFO L470 AbstractCegarLoop]: Abstraction has 9767 states and 12961 transitions. [2021-12-21 11:04:56,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:04:56,025 INFO L276 IsEmpty]: Start isEmpty. Operand 9767 states and 12961 transitions. [2021-12-21 11:04:56,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2021-12-21 11:04:56,028 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:04:56,028 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:04:56,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-21 11:04:56,029 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:04:56,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:04:56,029 INFO L85 PathProgramCache]: Analyzing trace with hash 374813785, now seen corresponding path program 1 times [2021-12-21 11:04:56,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:04:56,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622831277] [2021-12-21 11:04:56,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:04:56,030 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:04:56,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:04:56,193 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-12-21 11:04:56,194 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:04:56,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622831277] [2021-12-21 11:04:56,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622831277] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:04:56,195 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:04:56,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 11:04:56,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19401951] [2021-12-21 11:04:56,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:04:56,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:04:56,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:04:56,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:04:56,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:04:56,197 INFO L87 Difference]: Start difference. First operand 9767 states and 12961 transitions. Second operand has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 2 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:04:58,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:04:58,475 INFO L93 Difference]: Finished difference Result 25542 states and 34829 transitions. [2021-12-21 11:04:58,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:04:58,476 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 2 states have internal predecessors, (187), 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 251 [2021-12-21 11:04:58,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:04:58,550 INFO L225 Difference]: With dead ends: 25542 [2021-12-21 11:04:58,552 INFO L226 Difference]: Without dead ends: 15777 [2021-12-21 11:04:58,560 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 [2021-12-21 11:04:58,561 INFO L933 BasicCegarLoop]: 381 mSDtfsCounter, 848 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2343 mSolverCounterSat, 466 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 848 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 2809 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 466 IncrementalHoareTripleChecker+Valid, 2343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-21 11:04:58,561 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [848 Valid, 388 Invalid, 2809 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [466 Valid, 2343 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-21 11:04:58,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15777 states. [2021-12-21 11:04:58,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15777 to 15775. [2021-12-21 11:04:58,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15775 states, 15774 states have (on average 1.301572207429948) internal successors, (20531), 15774 states have internal predecessors, (20531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:04:58,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15775 states to 15775 states and 20531 transitions. [2021-12-21 11:04:58,734 INFO L78 Accepts]: Start accepts. Automaton has 15775 states and 20531 transitions. Word has length 251 [2021-12-21 11:04:58,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:04:58,735 INFO L470 AbstractCegarLoop]: Abstraction has 15775 states and 20531 transitions. [2021-12-21 11:04:58,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 2 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:04:58,738 INFO L276 IsEmpty]: Start isEmpty. Operand 15775 states and 20531 transitions. [2021-12-21 11:04:58,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2021-12-21 11:04:58,740 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:04:58,740 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:04:58,740 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-21 11:04:58,740 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:04:58,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:04:58,741 INFO L85 PathProgramCache]: Analyzing trace with hash -97634127, now seen corresponding path program 1 times [2021-12-21 11:04:58,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:04:58,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739917952] [2021-12-21 11:04:58,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:04:58,747 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:04:58,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:04:58,855 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-12-21 11:04:58,856 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:04:58,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739917952] [2021-12-21 11:04:58,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739917952] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:04:58,857 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:04:58,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:04:58,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211447400] [2021-12-21 11:04:58,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:04:58,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 11:04:58,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:04:58,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 11:04:58,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 11:04:58,858 INFO L87 Difference]: Start difference. First operand 15775 states and 20531 transitions. Second operand has 4 states, 4 states have (on average 46.75) internal successors, (187), 3 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:05:01,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:05:01,633 INFO L93 Difference]: Finished difference Result 31587 states and 41098 transitions. [2021-12-21 11:05:01,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 11:05:01,633 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 46.75) internal successors, (187), 3 states have internal predecessors, (187), 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 [2021-12-21 11:05:01,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:05:01,703 INFO L225 Difference]: With dead ends: 31587 [2021-12-21 11:05:01,703 INFO L226 Difference]: Without dead ends: 15777 [2021-12-21 11:05:01,714 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 [2021-12-21 11:05:01,716 INFO L933 BasicCegarLoop]: 387 mSDtfsCounter, 776 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 3813 mSolverCounterSat, 248 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 776 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 4061 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 248 IncrementalHoareTripleChecker+Valid, 3813 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-21 11:05:01,716 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [776 Valid, 402 Invalid, 4061 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [248 Valid, 3813 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-21 11:05:01,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15777 states. [2021-12-21 11:05:01,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15777 to 15775. [2021-12-21 11:05:01,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15775 states, 15774 states have (on average 1.2801445416508177) internal successors, (20193), 15774 states have internal predecessors, (20193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:05:01,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15775 states to 15775 states and 20193 transitions. [2021-12-21 11:05:01,881 INFO L78 Accepts]: Start accepts. Automaton has 15775 states and 20193 transitions. Word has length 256 [2021-12-21 11:05:01,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:05:01,882 INFO L470 AbstractCegarLoop]: Abstraction has 15775 states and 20193 transitions. [2021-12-21 11:05:01,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 46.75) internal successors, (187), 3 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:05:01,882 INFO L276 IsEmpty]: Start isEmpty. Operand 15775 states and 20193 transitions. [2021-12-21 11:05:01,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2021-12-21 11:05:01,885 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:05:01,885 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:05:01,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-21 11:05:01,885 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:05:01,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:05:01,886 INFO L85 PathProgramCache]: Analyzing trace with hash -469041642, now seen corresponding path program 1 times [2021-12-21 11:05:01,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:05:01,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403975304] [2021-12-21 11:05:01,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:05:01,886 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:05:01,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:05:01,962 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-12-21 11:05:01,962 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:05:01,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403975304] [2021-12-21 11:05:01,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403975304] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:05:01,963 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:05:01,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 11:05:01,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801452103] [2021-12-21 11:05:01,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:05:01,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:05:01,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:05:01,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:05:01,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:05:01,965 INFO L87 Difference]: Start difference. First operand 15775 states and 20193 transitions. Second operand has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 2 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:05:03,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:05:03,921 INFO L93 Difference]: Finished difference Result 44315 states and 57309 transitions. [2021-12-21 11:05:03,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:05:03,922 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 2 states have internal predecessors, (187), 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 265 [2021-12-21 11:05:03,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:05:03,955 INFO L225 Difference]: With dead ends: 44315 [2021-12-21 11:05:03,955 INFO L226 Difference]: Without dead ends: 28542 [2021-12-21 11:05:03,965 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 [2021-12-21 11:05:03,966 INFO L933 BasicCegarLoop]: 518 mSDtfsCounter, 652 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2001 mSolverCounterSat, 815 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 652 SdHoareTripleChecker+Valid, 524 SdHoareTripleChecker+Invalid, 2816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 815 IncrementalHoareTripleChecker+Valid, 2001 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-21 11:05:03,966 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [652 Valid, 524 Invalid, 2816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [815 Valid, 2001 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-21 11:05:03,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28542 states. [2021-12-21 11:05:04,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28542 to 23285. [2021-12-21 11:05:04,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23285 states, 23284 states have (on average 1.2308022676516062) internal successors, (28658), 23284 states have internal predecessors, (28658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:05:04,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23285 states to 23285 states and 28658 transitions. [2021-12-21 11:05:04,200 INFO L78 Accepts]: Start accepts. Automaton has 23285 states and 28658 transitions. Word has length 265 [2021-12-21 11:05:04,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:05:04,201 INFO L470 AbstractCegarLoop]: Abstraction has 23285 states and 28658 transitions. [2021-12-21 11:05:04,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 2 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:05:04,201 INFO L276 IsEmpty]: Start isEmpty. Operand 23285 states and 28658 transitions. [2021-12-21 11:05:04,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2021-12-21 11:05:04,203 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:05:04,204 INFO L514 BasicCegarLoop]: trace histogram [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, 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] [2021-12-21 11:05:04,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-21 11:05:04,204 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:05:04,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:05:04,205 INFO L85 PathProgramCache]: Analyzing trace with hash -1628944431, now seen corresponding path program 1 times [2021-12-21 11:05:04,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:05:04,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342568276] [2021-12-21 11:05:04,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:05:04,205 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:05:04,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:05:04,306 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 283 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-12-21 11:05:04,306 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:05:04,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342568276] [2021-12-21 11:05:04,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342568276] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:05:04,307 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:05:04,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:05:04,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178405215] [2021-12-21 11:05:04,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:05:04,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:05:04,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:05:04,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:05:04,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:05:04,308 INFO L87 Difference]: Start difference. First operand 23285 states and 28658 transitions. Second operand has 3 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:05:06,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:05:06,801 INFO L93 Difference]: Finished difference Result 58584 states and 71943 transitions. [2021-12-21 11:05:06,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:05:06,802 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 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 344 [2021-12-21 11:05:06,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:05:06,869 INFO L225 Difference]: With dead ends: 58584 [2021-12-21 11:05:06,870 INFO L226 Difference]: Without dead ends: 35301 [2021-12-21 11:05:06,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:05:06,886 INFO L933 BasicCegarLoop]: 265 mSDtfsCounter, 696 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2422 mSolverCounterSat, 407 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 696 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 2829 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 407 IncrementalHoareTripleChecker+Valid, 2422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-21 11:05:06,886 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [696 Valid, 272 Invalid, 2829 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [407 Valid, 2422 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-21 11:05:06,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35301 states. [2021-12-21 11:05:07,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35301 to 33799. [2021-12-21 11:05:07,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33799 states, 33798 states have (on average 1.2203384815669567) internal successors, (41245), 33798 states have internal predecessors, (41245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:05:07,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33799 states to 33799 states and 41245 transitions. [2021-12-21 11:05:07,194 INFO L78 Accepts]: Start accepts. Automaton has 33799 states and 41245 transitions. Word has length 344 [2021-12-21 11:05:07,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:05:07,195 INFO L470 AbstractCegarLoop]: Abstraction has 33799 states and 41245 transitions. [2021-12-21 11:05:07,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:05:07,195 INFO L276 IsEmpty]: Start isEmpty. Operand 33799 states and 41245 transitions. [2021-12-21 11:05:07,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 358 [2021-12-21 11:05:07,198 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:05:07,198 INFO L514 BasicCegarLoop]: trace histogram [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, 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] [2021-12-21 11:05:07,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-21 11:05:07,200 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:05:07,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:05:07,200 INFO L85 PathProgramCache]: Analyzing trace with hash 485264543, now seen corresponding path program 1 times [2021-12-21 11:05:07,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:05:07,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601014843] [2021-12-21 11:05:07,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:05:07,201 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:05:07,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:05:07,311 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 296 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-12-21 11:05:07,311 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:05:07,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601014843] [2021-12-21 11:05:07,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601014843] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:05:07,311 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:05:07,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:05:07,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360000011] [2021-12-21 11:05:07,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:05:07,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:05:07,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:05:07,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:05:07,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:05:07,313 INFO L87 Difference]: Start difference. First operand 33799 states and 41245 transitions. Second operand has 3 states, 3 states have (on average 93.33333333333333) internal successors, (280), 3 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:05:09,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:05:09,825 INFO L93 Difference]: Finished difference Result 87873 states and 108666 transitions. [2021-12-21 11:05:09,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:05:09,826 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 93.33333333333333) internal successors, (280), 3 states have internal predecessors, (280), 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 357 [2021-12-21 11:05:09,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:05:09,890 INFO L225 Difference]: With dead ends: 87873 [2021-12-21 11:05:09,890 INFO L226 Difference]: Without dead ends: 54076 [2021-12-21 11:05:09,916 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:05:09,918 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 780 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2166 mSolverCounterSat, 912 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 780 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 3078 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 912 IncrementalHoareTripleChecker+Valid, 2166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-21 11:05:09,919 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [780 Valid, 105 Invalid, 3078 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [912 Valid, 2166 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-21 11:05:09,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54076 states. [2021-12-21 11:05:10,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54076 to 51072. [2021-12-21 11:05:10,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51072 states, 51071 states have (on average 1.229484443226097) internal successors, (62791), 51071 states have internal predecessors, (62791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:05:10,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51072 states to 51072 states and 62791 transitions. [2021-12-21 11:05:10,552 INFO L78 Accepts]: Start accepts. Automaton has 51072 states and 62791 transitions. Word has length 357 [2021-12-21 11:05:10,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:05:10,552 INFO L470 AbstractCegarLoop]: Abstraction has 51072 states and 62791 transitions. [2021-12-21 11:05:10,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 93.33333333333333) internal successors, (280), 3 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:05:10,553 INFO L276 IsEmpty]: Start isEmpty. Operand 51072 states and 62791 transitions. [2021-12-21 11:05:10,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 362 [2021-12-21 11:05:10,555 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:05:10,555 INFO L514 BasicCegarLoop]: trace histogram [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, 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] [2021-12-21 11:05:10,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-21 11:05:10,556 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:05:10,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:05:10,556 INFO L85 PathProgramCache]: Analyzing trace with hash -636646891, now seen corresponding path program 1 times [2021-12-21 11:05:10,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:05:10,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331925010] [2021-12-21 11:05:10,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:05:10,557 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:05:10,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:05:10,689 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 125 proven. 108 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-12-21 11:05:10,689 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:05:10,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331925010] [2021-12-21 11:05:10,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331925010] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 11:05:10,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868240631] [2021-12-21 11:05:10,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:05:10,690 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 11:05:10,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 11:05:10,715 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 11:05:10,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-21 11:05:10,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:05:10,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-21 11:05:10,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 11:05:11,280 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 300 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-12-21 11:05:11,281 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 11:05:11,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868240631] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:05:11,281 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 11:05:11,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-21 11:05:11,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054348811] [2021-12-21 11:05:11,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:05:11,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:05:11,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:05:11,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:05:11,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-21 11:05:11,283 INFO L87 Difference]: Start difference. First operand 51072 states and 62791 transitions. Second operand has 3 states, 3 states have (on average 94.66666666666667) internal successors, (284), 3 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:05:13,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:05:13,415 INFO L93 Difference]: Finished difference Result 117913 states and 145409 transitions. [2021-12-21 11:05:13,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:05:13,415 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 94.66666666666667) internal successors, (284), 3 states have internal predecessors, (284), 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 361 [2021-12-21 11:05:13,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:05:13,489 INFO L225 Difference]: With dead ends: 117913 [2021-12-21 11:05:13,489 INFO L226 Difference]: Without dead ends: 66843 [2021-12-21 11:05:13,512 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 360 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-21 11:05:13,512 INFO L933 BasicCegarLoop]: 240 mSDtfsCounter, 760 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2072 mSolverCounterSat, 795 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 760 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 2867 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 795 IncrementalHoareTripleChecker+Valid, 2072 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-21 11:05:13,512 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [760 Valid, 246 Invalid, 2867 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [795 Valid, 2072 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-21 11:05:13,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66843 states. [2021-12-21 11:05:14,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66843 to 66843. [2021-12-21 11:05:14,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66843 states, 66842 states have (on average 1.2162562460728286) internal successors, (81297), 66842 states have internal predecessors, (81297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:05:14,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66843 states to 66843 states and 81297 transitions. [2021-12-21 11:05:14,127 INFO L78 Accepts]: Start accepts. Automaton has 66843 states and 81297 transitions. Word has length 361 [2021-12-21 11:05:14,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:05:14,127 INFO L470 AbstractCegarLoop]: Abstraction has 66843 states and 81297 transitions. [2021-12-21 11:05:14,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 94.66666666666667) internal successors, (284), 3 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:05:14,128 INFO L276 IsEmpty]: Start isEmpty. Operand 66843 states and 81297 transitions. [2021-12-21 11:05:14,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 373 [2021-12-21 11:05:14,131 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:05:14,131 INFO L514 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 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] [2021-12-21 11:05:14,150 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-21 11:05:14,347 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,SelfDestructingSolverStorable9 [2021-12-21 11:05:14,348 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:05:14,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:05:14,348 INFO L85 PathProgramCache]: Analyzing trace with hash 93657291, now seen corresponding path program 1 times [2021-12-21 11:05:14,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:05:14,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943511698] [2021-12-21 11:05:14,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:05:14,349 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:05:14,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:05:14,435 INFO L134 CoverageAnalysis]: Checked inductivity of 389 backedges. 125 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2021-12-21 11:05:14,436 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:05:14,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943511698] [2021-12-21 11:05:14,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943511698] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:05:14,436 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:05:14,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:05:14,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61894584] [2021-12-21 11:05:14,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:05:14,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:05:14,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:05:14,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:05:14,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:05:14,438 INFO L87 Difference]: Start difference. First operand 66843 states and 81297 transitions. Second operand has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 3 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:05:17,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:05:17,245 INFO L93 Difference]: Finished difference Result 162222 states and 196832 transitions. [2021-12-21 11:05:17,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:05:17,245 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 3 states have internal predecessors, (188), 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 372 [2021-12-21 11:05:17,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:05:17,352 INFO L225 Difference]: With dead ends: 162222 [2021-12-21 11:05:17,352 INFO L226 Difference]: Without dead ends: 95381 [2021-12-21 11:05:17,367 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:05:17,367 INFO L933 BasicCegarLoop]: 1316 mSDtfsCounter, 747 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2165 mSolverCounterSat, 522 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 747 SdHoareTripleChecker+Valid, 1324 SdHoareTripleChecker+Invalid, 2687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 522 IncrementalHoareTripleChecker+Valid, 2165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-21 11:05:17,368 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [747 Valid, 1324 Invalid, 2687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [522 Valid, 2165 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-21 11:05:17,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95381 states. [2021-12-21 11:05:18,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95381 to 93128. [2021-12-21 11:05:18,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93128 states, 93127 states have (on average 1.1820739420361441) internal successors, (110083), 93127 states have internal predecessors, (110083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:05:18,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93128 states to 93128 states and 110083 transitions. [2021-12-21 11:05:18,461 INFO L78 Accepts]: Start accepts. Automaton has 93128 states and 110083 transitions. Word has length 372 [2021-12-21 11:05:18,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:05:18,463 INFO L470 AbstractCegarLoop]: Abstraction has 93128 states and 110083 transitions. [2021-12-21 11:05:18,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 3 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:05:18,463 INFO L276 IsEmpty]: Start isEmpty. Operand 93128 states and 110083 transitions. [2021-12-21 11:05:18,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 424 [2021-12-21 11:05:18,498 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:05:18,499 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:05:18,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-21 11:05:18,500 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:05:18,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:05:18,500 INFO L85 PathProgramCache]: Analyzing trace with hash -61006828, now seen corresponding path program 1 times [2021-12-21 11:05:18,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:05:18,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233888112] [2021-12-21 11:05:18,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:05:18,501 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:05:18,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:05:18,605 INFO L134 CoverageAnalysis]: Checked inductivity of 606 backedges. 466 proven. 0 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2021-12-21 11:05:18,606 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:05:18,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233888112] [2021-12-21 11:05:18,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233888112] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:05:18,606 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:05:18,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:05:18,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569936278] [2021-12-21 11:05:18,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:05:18,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:05:18,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:05:18,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:05:18,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:05:18,608 INFO L87 Difference]: Start difference. First operand 93128 states and 110083 transitions. Second operand has 3 states, 3 states have (on average 95.0) internal successors, (285), 3 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:05:21,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:05:21,418 INFO L93 Difference]: Finished difference Result 190009 states and 223998 transitions. [2021-12-21 11:05:21,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:05:21,419 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 95.0) internal successors, (285), 3 states have internal predecessors, (285), 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 423 [2021-12-21 11:05:21,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:05:21,527 INFO L225 Difference]: With dead ends: 190009 [2021-12-21 11:05:21,527 INFO L226 Difference]: Without dead ends: 96132 [2021-12-21 11:05:21,547 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:05:21,549 INFO L933 BasicCegarLoop]: 1059 mSDtfsCounter, 803 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2096 mSolverCounterSat, 665 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 803 SdHoareTripleChecker+Valid, 1067 SdHoareTripleChecker+Invalid, 2761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 665 IncrementalHoareTripleChecker+Valid, 2096 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-21 11:05:21,549 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [803 Valid, 1067 Invalid, 2761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [665 Valid, 2096 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-21 11:05:21,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96132 states. [2021-12-21 11:05:22,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96132 to 90875. [2021-12-21 11:05:22,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90875 states, 90874 states have (on average 1.1520676981314788) internal successors, (104693), 90874 states have internal predecessors, (104693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:05:22,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90875 states to 90875 states and 104693 transitions. [2021-12-21 11:05:22,548 INFO L78 Accepts]: Start accepts. Automaton has 90875 states and 104693 transitions. Word has length 423 [2021-12-21 11:05:22,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:05:22,549 INFO L470 AbstractCegarLoop]: Abstraction has 90875 states and 104693 transitions. [2021-12-21 11:05:22,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 95.0) internal successors, (285), 3 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:05:22,549 INFO L276 IsEmpty]: Start isEmpty. Operand 90875 states and 104693 transitions. [2021-12-21 11:05:22,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 428 [2021-12-21 11:05:22,562 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:05:22,563 INFO L514 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-21 11:05:22,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-21 11:05:22,563 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:05:22,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:05:22,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1882321360, now seen corresponding path program 1 times [2021-12-21 11:05:22,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:05:22,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399182175] [2021-12-21 11:05:22,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:05:22,564 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:05:22,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:05:22,784 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 125 proven. 108 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2021-12-21 11:05:22,784 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:05:22,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399182175] [2021-12-21 11:05:22,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399182175] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 11:05:22,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340710473] [2021-12-21 11:05:22,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:05:22,785 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 11:05:22,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 11:05:22,800 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 11:05:22,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-21 11:05:23,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:05:23,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 564 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-21 11:05:23,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 11:05:23,642 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 125 proven. 0 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2021-12-21 11:05:23,643 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 11:05:23,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340710473] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:05:23,643 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 11:05:23,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-12-21 11:05:23,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170439529] [2021-12-21 11:05:23,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:05:23,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:05:23,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:05:23,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:05:23,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-21 11:05:23,644 INFO L87 Difference]: Start difference. First operand 90875 states and 104693 transitions. Second operand has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:05:26,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:05:26,162 INFO L93 Difference]: Finished difference Result 179495 states and 206955 transitions. [2021-12-21 11:05:26,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:05:26,162 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 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 427 [2021-12-21 11:05:26,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:05:26,257 INFO L225 Difference]: With dead ends: 179495 [2021-12-21 11:05:26,257 INFO L226 Difference]: Without dead ends: 89373 [2021-12-21 11:05:26,300 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 430 GetRequests, 426 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-21 11:05:26,302 INFO L933 BasicCegarLoop]: 1301 mSDtfsCounter, 747 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2089 mSolverCounterSat, 630 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 747 SdHoareTripleChecker+Valid, 1309 SdHoareTripleChecker+Invalid, 2719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 630 IncrementalHoareTripleChecker+Valid, 2089 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-21 11:05:26,302 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [747 Valid, 1309 Invalid, 2719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [630 Valid, 2089 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-21 11:05:26,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89373 states. [2021-12-21 11:05:27,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89373 to 84867. [2021-12-21 11:05:27,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84867 states, 84866 states have (on average 1.107769896071454) internal successors, (94012), 84866 states have internal predecessors, (94012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:05:27,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84867 states to 84867 states and 94012 transitions. [2021-12-21 11:05:27,297 INFO L78 Accepts]: Start accepts. Automaton has 84867 states and 94012 transitions. Word has length 427 [2021-12-21 11:05:27,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:05:27,297 INFO L470 AbstractCegarLoop]: Abstraction has 84867 states and 94012 transitions. [2021-12-21 11:05:27,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:05:27,298 INFO L276 IsEmpty]: Start isEmpty. Operand 84867 states and 94012 transitions. [2021-12-21 11:05:27,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 457 [2021-12-21 11:05:27,302 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:05:27,303 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:05:27,319 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-21 11:05:27,518 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,SelfDestructingSolverStorable12 [2021-12-21 11:05:27,519 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:05:27,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:05:27,519 INFO L85 PathProgramCache]: Analyzing trace with hash 1284409237, now seen corresponding path program 1 times [2021-12-21 11:05:27,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:05:27,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101389894] [2021-12-21 11:05:27,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:05:27,520 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:05:27,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:05:27,716 INFO L134 CoverageAnalysis]: Checked inductivity of 667 backedges. 509 proven. 0 refuted. 0 times theorem prover too weak. 158 trivial. 0 not checked. [2021-12-21 11:05:27,716 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:05:27,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101389894] [2021-12-21 11:05:27,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101389894] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:05:27,717 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:05:27,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:05:27,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54797371] [2021-12-21 11:05:27,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:05:27,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:05:27,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:05:27,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:05:27,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:05:27,719 INFO L87 Difference]: Start difference. First operand 84867 states and 94012 transitions. Second operand has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:05:30,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:05:30,850 INFO L93 Difference]: Finished difference Result 184001 states and 202915 transitions. [2021-12-21 11:05:30,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:05:30,851 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 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 456 [2021-12-21 11:05:30,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:05:30,985 INFO L225 Difference]: With dead ends: 184001 [2021-12-21 11:05:30,986 INFO L226 Difference]: Without dead ends: 99887 [2021-12-21 11:05:31,035 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:05:31,036 INFO L933 BasicCegarLoop]: 1242 mSDtfsCounter, 650 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2608 mSolverCounterSat, 315 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 650 SdHoareTripleChecker+Valid, 1250 SdHoareTripleChecker+Invalid, 2923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 315 IncrementalHoareTripleChecker+Valid, 2608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-21 11:05:31,036 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [650 Valid, 1250 Invalid, 2923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [315 Valid, 2608 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-21 11:05:31,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99887 states. [2021-12-21 11:05:31,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99887 to 94630. [2021-12-21 11:05:32,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94630 states, 94629 states have (on average 1.0941466146741485) internal successors, (103538), 94629 states have internal predecessors, (103538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:05:32,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94630 states to 94630 states and 103538 transitions. [2021-12-21 11:05:32,143 INFO L78 Accepts]: Start accepts. Automaton has 94630 states and 103538 transitions. Word has length 456 [2021-12-21 11:05:32,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:05:32,143 INFO L470 AbstractCegarLoop]: Abstraction has 94630 states and 103538 transitions. [2021-12-21 11:05:32,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:05:32,143 INFO L276 IsEmpty]: Start isEmpty. Operand 94630 states and 103538 transitions. [2021-12-21 11:05:32,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 508 [2021-12-21 11:05:32,150 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:05:32,150 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:05:32,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-21 11:05:32,151 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:05:32,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:05:32,151 INFO L85 PathProgramCache]: Analyzing trace with hash -1182994588, now seen corresponding path program 1 times [2021-12-21 11:05:32,151 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:05:32,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137003934] [2021-12-21 11:05:32,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:05:32,152 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:05:32,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:05:32,303 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 363 proven. 108 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-12-21 11:05:32,304 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:05:32,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137003934] [2021-12-21 11:05:32,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137003934] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 11:05:32,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553402841] [2021-12-21 11:05:32,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:05:32,304 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 11:05:32,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 11:05:32,306 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 11:05:32,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-21 11:05:32,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:05:32,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 671 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-21 11:05:32,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 11:05:32,999 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 405 proven. 0 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2021-12-21 11:05:33,000 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 11:05:33,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553402841] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:05:33,000 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 11:05:33,000 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-12-21 11:05:33,000 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839548221] [2021-12-21 11:05:33,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:05:33,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:05:33,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:05:33,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:05:33,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-21 11:05:33,001 INFO L87 Difference]: Start difference. First operand 94630 states and 103538 transitions. Second operand has 3 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:05:35,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:05:35,919 INFO L93 Difference]: Finished difference Result 189258 states and 207072 transitions. [2021-12-21 11:05:35,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:05:35,919 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 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 507 [2021-12-21 11:05:35,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:05:36,020 INFO L225 Difference]: With dead ends: 189258 [2021-12-21 11:05:36,020 INFO L226 Difference]: Without dead ends: 95381 [2021-12-21 11:05:36,046 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 510 GetRequests, 506 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-21 11:05:36,047 INFO L933 BasicCegarLoop]: 406 mSDtfsCounter, 738 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2214 mSolverCounterSat, 330 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 738 SdHoareTripleChecker+Valid, 412 SdHoareTripleChecker+Invalid, 2544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 330 IncrementalHoareTripleChecker+Valid, 2214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-21 11:05:36,047 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [738 Valid, 412 Invalid, 2544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [330 Valid, 2214 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-21 11:05:36,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95381 states. [2021-12-21 11:05:36,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95381 to 92377. [2021-12-21 11:05:37,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92377 states, 92376 states have (on average 1.0786243180046766) internal successors, (99639), 92376 states have internal predecessors, (99639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:05:37,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92377 states to 92377 states and 99639 transitions. [2021-12-21 11:05:37,143 INFO L78 Accepts]: Start accepts. Automaton has 92377 states and 99639 transitions. Word has length 507 [2021-12-21 11:05:37,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:05:37,143 INFO L470 AbstractCegarLoop]: Abstraction has 92377 states and 99639 transitions. [2021-12-21 11:05:37,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:05:37,144 INFO L276 IsEmpty]: Start isEmpty. Operand 92377 states and 99639 transitions. [2021-12-21 11:05:37,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 509 [2021-12-21 11:05:37,150 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:05:37,150 INFO L514 BasicCegarLoop]: trace histogram [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, 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] [2021-12-21 11:05:37,167 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-21 11:05:37,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 11:05:37,367 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:05:37,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:05:37,367 INFO L85 PathProgramCache]: Analyzing trace with hash -1439974613, now seen corresponding path program 1 times [2021-12-21 11:05:37,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:05:37,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031982717] [2021-12-21 11:05:37,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:05:37,368 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:05:37,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:05:37,580 INFO L134 CoverageAnalysis]: Checked inductivity of 502 backedges. 125 proven. 0 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2021-12-21 11:05:37,581 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:05:37,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031982717] [2021-12-21 11:05:37,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031982717] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:05:37,581 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:05:37,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:05:37,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993807509] [2021-12-21 11:05:37,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:05:37,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:05:37,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:05:37,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:05:37,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:05:37,583 INFO L87 Difference]: Start difference. First operand 92377 states and 99639 transitions. Second operand has 3 states, 3 states have (on average 83.0) internal successors, (249), 3 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:05:40,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:05:40,056 INFO L93 Difference]: Finished difference Result 184001 states and 198520 transitions. [2021-12-21 11:05:40,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:05:40,056 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 83.0) internal successors, (249), 3 states have internal predecessors, (249), 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 508 [2021-12-21 11:05:40,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:05:40,168 INFO L225 Difference]: With dead ends: 184001 [2021-12-21 11:05:40,169 INFO L226 Difference]: Without dead ends: 92377 [2021-12-21 11:05:40,218 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:05:40,219 INFO L933 BasicCegarLoop]: 1233 mSDtfsCounter, 729 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2273 mSolverCounterSat, 297 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 729 SdHoareTripleChecker+Valid, 1241 SdHoareTripleChecker+Invalid, 2570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 297 IncrementalHoareTripleChecker+Valid, 2273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-21 11:05:40,219 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [729 Valid, 1241 Invalid, 2570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [297 Valid, 2273 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-21 11:05:40,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92377 states. [2021-12-21 11:05:41,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92377 to 90875. [2021-12-21 11:05:41,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90875 states, 90874 states have (on average 1.0689856284525827) internal successors, (97143), 90874 states have internal predecessors, (97143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:05:41,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90875 states to 90875 states and 97143 transitions. [2021-12-21 11:05:41,261 INFO L78 Accepts]: Start accepts. Automaton has 90875 states and 97143 transitions. Word has length 508 [2021-12-21 11:05:41,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:05:41,262 INFO L470 AbstractCegarLoop]: Abstraction has 90875 states and 97143 transitions. [2021-12-21 11:05:41,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 83.0) internal successors, (249), 3 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:05:41,262 INFO L276 IsEmpty]: Start isEmpty. Operand 90875 states and 97143 transitions. [2021-12-21 11:05:41,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 525 [2021-12-21 11:05:41,270 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:05:41,271 INFO L514 BasicCegarLoop]: trace histogram [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, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:05:41,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-21 11:05:41,271 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:05:41,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:05:41,271 INFO L85 PathProgramCache]: Analyzing trace with hash 1518596476, now seen corresponding path program 1 times [2021-12-21 11:05:41,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:05:41,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110551661] [2021-12-21 11:05:41,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:05:41,272 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:05:41,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:05:41,694 INFO L134 CoverageAnalysis]: Checked inductivity of 957 backedges. 662 proven. 0 refuted. 0 times theorem prover too weak. 295 trivial. 0 not checked. [2021-12-21 11:05:41,694 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:05:41,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110551661] [2021-12-21 11:05:41,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110551661] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:05:41,695 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:05:41,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:05:41,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053844365] [2021-12-21 11:05:41,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:05:41,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:05:41,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:05:41,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:05:41,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:05:41,696 INFO L87 Difference]: Start difference. First operand 90875 states and 97143 transitions. Second operand has 3 states, 3 states have (on average 100.0) internal successors, (300), 3 states have internal predecessors, (300), 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)