./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3a877d22 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+cfa-reducer.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 4d2ad25966f5b06d930031b35708c7035a644982dad73f08910281a8c7df501a --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 11:27:17,395 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 11:27:17,396 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 11:27:17,423 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 11:27:17,423 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 11:27:17,424 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 11:27:17,425 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 11:27:17,435 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 11:27:17,451 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 11:27:17,455 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 11:27:17,455 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 11:27:17,457 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 11:27:17,457 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 11:27:17,459 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 11:27:17,461 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 11:27:17,465 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 11:27:17,465 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 11:27:17,466 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 11:27:17,470 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 11:27:17,474 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 11:27:17,475 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 11:27:17,476 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 11:27:17,477 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 11:27:17,478 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 11:27:17,482 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 11:27:17,484 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 11:27:17,484 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 11:27:17,485 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 11:27:17,486 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 11:27:17,486 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 11:27:17,487 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 11:27:17,487 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 11:27:17,488 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 11:27:17,489 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 11:27:17,490 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 11:27:17,490 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 11:27:17,491 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 11:27:17,491 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 11:27:17,491 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 11:27:17,492 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 11:27:17,493 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 11:27:17,493 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 11:27:17,522 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 11:27:17,522 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 11:27:17,522 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 11:27:17,523 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 11:27:17,523 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 11:27:17,523 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 11:27:17,524 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 11:27:17,524 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 11:27:17,524 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 11:27:17,524 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 11:27:17,525 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 11:27:17,525 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 11:27:17,525 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 11:27:17,525 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 11:27:17,526 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 11:27:17,526 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 11:27:17,526 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 11:27:17,526 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 11:27:17,526 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 11:27:17,526 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 11:27:17,526 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 11:27:17,527 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 11:27:17,527 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 11:27:17,527 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 11:27:17,527 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 11:27:17,527 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 11:27:17,527 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 11:27:17,528 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 11:27:17,529 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 11:27:17,529 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 11:27:17,529 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 11:27:17,529 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 11:27:17,529 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 11:27:17,529 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 11:27:17,529 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4d2ad25966f5b06d930031b35708c7035a644982dad73f08910281a8c7df501a [2021-12-15 11:27:17,723 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 11:27:17,740 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 11:27:17,743 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 11:27:17,744 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 11:27:17,744 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 11:27:17,745 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2021-12-15 11:27:17,807 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/89fade43f/180ba0d5d3e54b28aa5184d0b4d39400/FLAG68096a2ff [2021-12-15 11:27:18,188 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 11:27:18,188 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2021-12-15 11:27:18,199 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/89fade43f/180ba0d5d3e54b28aa5184d0b4d39400/FLAG68096a2ff [2021-12-15 11:27:18,207 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/89fade43f/180ba0d5d3e54b28aa5184d0b4d39400 [2021-12-15 11:27:18,209 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 11:27:18,210 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 11:27:18,211 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 11:27:18,211 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 11:27:18,213 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 11:27:18,214 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 11:27:18" (1/1) ... [2021-12-15 11:27:18,215 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@682a616a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:27:18, skipping insertion in model container [2021-12-15 11:27:18,215 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 11:27:18" (1/1) ... [2021-12-15 11:27:18,219 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 11:27:18,240 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 11:27:18,383 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/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c[4373,4386] [2021-12-15 11:27:18,395 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 11:27:18,403 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 11:27:18,422 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/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c[4373,4386] [2021-12-15 11:27:18,431 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 11:27:18,446 INFO L208 MainTranslator]: Completed translation [2021-12-15 11:27:18,447 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:27:18 WrapperNode [2021-12-15 11:27:18,447 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 11:27:18,449 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 11:27:18,449 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 11:27:18,449 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 11:27:18,454 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:27:18" (1/1) ... [2021-12-15 11:27:18,460 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:27:18" (1/1) ... [2021-12-15 11:27:18,478 INFO L137 Inliner]: procedures = 22, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 320 [2021-12-15 11:27:18,478 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 11:27:18,479 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 11:27:18,479 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 11:27:18,479 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 11:27:18,484 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:27:18" (1/1) ... [2021-12-15 11:27:18,485 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:27:18" (1/1) ... [2021-12-15 11:27:18,487 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:27:18" (1/1) ... [2021-12-15 11:27:18,487 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:27:18" (1/1) ... [2021-12-15 11:27:18,491 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:27:18" (1/1) ... [2021-12-15 11:27:18,506 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:27:18" (1/1) ... [2021-12-15 11:27:18,507 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:27:18" (1/1) ... [2021-12-15 11:27:18,509 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 11:27:18,509 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 11:27:18,509 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 11:27:18,509 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 11:27:18,510 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:27:18" (1/1) ... [2021-12-15 11:27:18,519 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 11:27:18,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 11:27:18,546 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-15 11:27:18,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-15 11:27:18,582 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 11:27:18,582 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 11:27:18,582 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 11:27:18,582 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 11:27:18,642 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 11:27:18,643 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 11:27:18,899 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 11:27:18,904 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 11:27:18,904 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-15 11:27:18,913 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 11:27:18 BoogieIcfgContainer [2021-12-15 11:27:18,913 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 11:27:18,915 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 11:27:18,915 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 11:27:18,918 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 11:27:18,918 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 11:27:18" (1/3) ... [2021-12-15 11:27:18,919 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bd73322 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 11:27:18, skipping insertion in model container [2021-12-15 11:27:18,919 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:27:18" (2/3) ... [2021-12-15 11:27:18,919 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bd73322 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 11:27:18, skipping insertion in model container [2021-12-15 11:27:18,919 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 11:27:18" (3/3) ... [2021-12-15 11:27:18,920 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2021-12-15 11:27:18,923 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 11:27:18,924 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 11:27:18,953 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 11:27:18,958 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-15 11:27:18,958 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 11:27:18,969 INFO L276 IsEmpty]: Start isEmpty. Operand has 80 states, 78 states have (on average 1.6923076923076923) internal successors, (132), 79 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:27:18,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-15 11:27:18,974 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:27:18,974 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] [2021-12-15 11:27:18,975 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:27:18,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:27:18,979 INFO L85 PathProgramCache]: Analyzing trace with hash -1485847759, now seen corresponding path program 1 times [2021-12-15 11:27:18,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:27:18,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710121797] [2021-12-15 11:27:18,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:27:18,986 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:27:19,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:27:19,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:27:19,165 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:27:19,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710121797] [2021-12-15 11:27:19,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710121797] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:27:19,166 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:27:19,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:27:19,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748188189] [2021-12-15 11:27:19,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:27:19,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:27:19,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:27:19,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:27:19,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:27:19,199 INFO L87 Difference]: Start difference. First operand has 80 states, 78 states have (on average 1.6923076923076923) internal successors, (132), 79 states have internal predecessors, (132), 0 states have call successors, (0), 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 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:27:19,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:27:19,256 INFO L93 Difference]: Finished difference Result 184 states and 294 transitions. [2021-12-15 11:27:19,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:27:19,258 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 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 37 [2021-12-15 11:27:19,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:27:19,265 INFO L225 Difference]: With dead ends: 184 [2021-12-15 11:27:19,265 INFO L226 Difference]: Without dead ends: 118 [2021-12-15 11:27:19,267 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:27:19,269 INFO L933 BasicCegarLoop]: 172 mSDtfsCounter, 85 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:27:19,270 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 263 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:27:19,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-12-15 11:27:19,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 116. [2021-12-15 11:27:19,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 1.4956521739130435) internal successors, (172), 115 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:27:19,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 172 transitions. [2021-12-15 11:27:19,298 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 172 transitions. Word has length 37 [2021-12-15 11:27:19,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:27:19,299 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 172 transitions. [2021-12-15 11:27:19,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:27:19,299 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 172 transitions. [2021-12-15 11:27:19,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-15 11:27:19,300 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:27:19,300 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] [2021-12-15 11:27:19,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 11:27:19,301 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:27:19,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:27:19,301 INFO L85 PathProgramCache]: Analyzing trace with hash -498229074, now seen corresponding path program 1 times [2021-12-15 11:27:19,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:27:19,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077818236] [2021-12-15 11:27:19,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:27:19,302 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:27:19,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:27:19,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:27:19,366 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:27:19,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077818236] [2021-12-15 11:27:19,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077818236] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:27:19,367 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:27:19,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:27:19,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882663044] [2021-12-15 11:27:19,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:27:19,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:27:19,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:27:19,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:27:19,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:27:19,369 INFO L87 Difference]: Start difference. First operand 116 states and 172 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:27:19,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:27:19,392 INFO L93 Difference]: Finished difference Result 276 states and 424 transitions. [2021-12-15 11:27:19,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:27:19,393 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-12-15 11:27:19,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:27:19,394 INFO L225 Difference]: With dead ends: 276 [2021-12-15 11:27:19,394 INFO L226 Difference]: Without dead ends: 180 [2021-12-15 11:27:19,395 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:27:19,397 INFO L933 BasicCegarLoop]: 130 mSDtfsCounter, 69 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:27:19,398 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 213 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:27:19,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-12-15 11:27:19,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 178. [2021-12-15 11:27:19,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 1.5197740112994351) internal successors, (269), 177 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:27:19,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 269 transitions. [2021-12-15 11:27:19,441 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 269 transitions. Word has length 38 [2021-12-15 11:27:19,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:27:19,442 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 269 transitions. [2021-12-15 11:27:19,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:27:19,442 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 269 transitions. [2021-12-15 11:27:19,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-15 11:27:19,443 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:27:19,443 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] [2021-12-15 11:27:19,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 11:27:19,443 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:27:19,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:27:19,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1494403672, now seen corresponding path program 1 times [2021-12-15 11:27:19,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:27:19,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128871615] [2021-12-15 11:27:19,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:27:19,444 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:27:19,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:27:19,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:27:19,523 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:27:19,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128871615] [2021-12-15 11:27:19,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128871615] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:27:19,531 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:27:19,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 11:27:19,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131513397] [2021-12-15 11:27:19,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:27:19,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 11:27:19,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:27:19,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 11:27:19,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 11:27:19,533 INFO L87 Difference]: Start difference. First operand 178 states and 269 transitions. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:27:19,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:27:19,659 INFO L93 Difference]: Finished difference Result 810 states and 1265 transitions. [2021-12-15 11:27:19,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 11:27:19,661 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 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 39 [2021-12-15 11:27:19,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:27:19,664 INFO L225 Difference]: With dead ends: 810 [2021-12-15 11:27:19,664 INFO L226 Difference]: Without dead ends: 652 [2021-12-15 11:27:19,665 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-15 11:27:19,666 INFO L933 BasicCegarLoop]: 108 mSDtfsCounter, 447 mSDsluCounter, 512 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 447 SdHoareTripleChecker+Valid, 620 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 11:27:19,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [447 Valid, 620 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 11:27:19,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states. [2021-12-15 11:27:19,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 334. [2021-12-15 11:27:19,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 1.5285285285285286) internal successors, (509), 333 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:27:19,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 509 transitions. [2021-12-15 11:27:19,709 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 509 transitions. Word has length 39 [2021-12-15 11:27:19,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:27:19,709 INFO L470 AbstractCegarLoop]: Abstraction has 334 states and 509 transitions. [2021-12-15 11:27:19,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:27:19,710 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 509 transitions. [2021-12-15 11:27:19,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-15 11:27:19,710 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:27:19,710 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] [2021-12-15 11:27:19,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 11:27:19,711 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:27:19,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:27:19,711 INFO L85 PathProgramCache]: Analyzing trace with hash -937582741, now seen corresponding path program 1 times [2021-12-15 11:27:19,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:27:19,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307590871] [2021-12-15 11:27:19,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:27:19,712 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:27:19,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:27:19,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:27:19,797 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:27:19,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307590871] [2021-12-15 11:27:19,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307590871] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:27:19,797 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:27:19,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 11:27:19,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726805585] [2021-12-15 11:27:19,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:27:19,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 11:27:19,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:27:19,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 11:27:19,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-15 11:27:19,799 INFO L87 Difference]: Start difference. First operand 334 states and 509 transitions. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:27:19,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:27:19,890 INFO L93 Difference]: Finished difference Result 1164 states and 1792 transitions. [2021-12-15 11:27:19,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 11:27:19,891 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 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 40 [2021-12-15 11:27:19,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:27:19,895 INFO L225 Difference]: With dead ends: 1164 [2021-12-15 11:27:19,895 INFO L226 Difference]: Without dead ends: 850 [2021-12-15 11:27:19,899 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-15 11:27:19,916 INFO L933 BasicCegarLoop]: 195 mSDtfsCounter, 278 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 11:27:19,916 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 334 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 11:27:19,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 850 states. [2021-12-15 11:27:19,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 850 to 846. [2021-12-15 11:27:19,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 846 states, 845 states have (on average 1.5301775147928993) internal successors, (1293), 845 states have internal predecessors, (1293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:27:19,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 846 states to 846 states and 1293 transitions. [2021-12-15 11:27:19,983 INFO L78 Accepts]: Start accepts. Automaton has 846 states and 1293 transitions. Word has length 40 [2021-12-15 11:27:19,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:27:19,985 INFO L470 AbstractCegarLoop]: Abstraction has 846 states and 1293 transitions. [2021-12-15 11:27:19,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:27:19,985 INFO L276 IsEmpty]: Start isEmpty. Operand 846 states and 1293 transitions. [2021-12-15 11:27:19,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-15 11:27:19,992 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:27:19,992 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] [2021-12-15 11:27:19,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 11:27:19,992 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:27:19,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:27:19,997 INFO L85 PathProgramCache]: Analyzing trace with hash 936362024, now seen corresponding path program 1 times [2021-12-15 11:27:19,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:27:19,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783843590] [2021-12-15 11:27:19,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:27:19,998 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:27:20,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:27:20,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:27:20,050 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:27:20,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783843590] [2021-12-15 11:27:20,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783843590] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:27:20,050 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:27:20,051 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:27:20,051 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844786116] [2021-12-15 11:27:20,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:27:20,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:27:20,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:27:20,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:27:20,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:27:20,052 INFO L87 Difference]: Start difference. First operand 846 states and 1293 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:27:20,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:27:20,118 INFO L93 Difference]: Finished difference Result 2234 states and 3407 transitions. [2021-12-15 11:27:20,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:27:20,118 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 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 40 [2021-12-15 11:27:20,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:27:20,124 INFO L225 Difference]: With dead ends: 2234 [2021-12-15 11:27:20,124 INFO L226 Difference]: Without dead ends: 1408 [2021-12-15 11:27:20,126 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:27:20,131 INFO L933 BasicCegarLoop]: 178 mSDtfsCounter, 78 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:27:20,132 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 261 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:27:20,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1408 states. [2021-12-15 11:27:20,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1408 to 1406. [2021-12-15 11:27:20,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1406 states, 1405 states have (on average 1.5010676156583629) internal successors, (2109), 1405 states have internal predecessors, (2109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:27:20,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1406 states to 1406 states and 2109 transitions. [2021-12-15 11:27:20,212 INFO L78 Accepts]: Start accepts. Automaton has 1406 states and 2109 transitions. Word has length 40 [2021-12-15 11:27:20,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:27:20,213 INFO L470 AbstractCegarLoop]: Abstraction has 1406 states and 2109 transitions. [2021-12-15 11:27:20,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:27:20,215 INFO L276 IsEmpty]: Start isEmpty. Operand 1406 states and 2109 transitions. [2021-12-15 11:27:20,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-15 11:27:20,216 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:27:20,217 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] [2021-12-15 11:27:20,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-15 11:27:20,217 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:27:20,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:27:20,218 INFO L85 PathProgramCache]: Analyzing trace with hash -669019710, now seen corresponding path program 1 times [2021-12-15 11:27:20,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:27:20,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099117471] [2021-12-15 11:27:20,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:27:20,222 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:27:20,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:27:20,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:27:20,299 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:27:20,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099117471] [2021-12-15 11:27:20,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099117471] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:27:20,299 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:27:20,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 11:27:20,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490723775] [2021-12-15 11:27:20,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:27:20,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 11:27:20,300 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:27:20,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 11:27:20,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 11:27:20,301 INFO L87 Difference]: Start difference. First operand 1406 states and 2109 transitions. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:27:20,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:27:20,494 INFO L93 Difference]: Finished difference Result 4178 states and 6287 transitions. [2021-12-15 11:27:20,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 11:27:20,494 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-12-15 11:27:20,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:27:20,502 INFO L225 Difference]: With dead ends: 4178 [2021-12-15 11:27:20,503 INFO L226 Difference]: Without dead ends: 2792 [2021-12-15 11:27:20,505 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-15 11:27:20,506 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 455 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 455 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 11:27:20,506 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [455 Valid, 131 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 11:27:20,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2792 states. [2021-12-15 11:27:20,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2792 to 2790. [2021-12-15 11:27:20,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2790 states, 2789 states have (on average 1.4933667981355325) internal successors, (4165), 2789 states have internal predecessors, (4165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:27:20,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2790 states to 2790 states and 4165 transitions. [2021-12-15 11:27:20,626 INFO L78 Accepts]: Start accepts. Automaton has 2790 states and 4165 transitions. Word has length 42 [2021-12-15 11:27:20,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:27:20,626 INFO L470 AbstractCegarLoop]: Abstraction has 2790 states and 4165 transitions. [2021-12-15 11:27:20,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:27:20,627 INFO L276 IsEmpty]: Start isEmpty. Operand 2790 states and 4165 transitions. [2021-12-15 11:27:20,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-15 11:27:20,628 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:27:20,629 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] [2021-12-15 11:27:20,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-15 11:27:20,629 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:27:20,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:27:20,630 INFO L85 PathProgramCache]: Analyzing trace with hash 957144957, now seen corresponding path program 1 times [2021-12-15 11:27:20,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:27:20,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709554514] [2021-12-15 11:27:20,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:27:20,630 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:27:20,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:27:20,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:27:20,726 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:27:20,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709554514] [2021-12-15 11:27:20,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709554514] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:27:20,726 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:27:20,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 11:27:20,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879834696] [2021-12-15 11:27:20,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:27:20,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 11:27:20,728 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:27:20,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 11:27:20,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 11:27:20,728 INFO L87 Difference]: Start difference. First operand 2790 states and 4165 transitions. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:27:20,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:27:20,995 INFO L93 Difference]: Finished difference Result 5752 states and 8502 transitions. [2021-12-15 11:27:20,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-15 11:27:20,995 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-12-15 11:27:20,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:27:21,014 INFO L225 Difference]: With dead ends: 5752 [2021-12-15 11:27:21,014 INFO L226 Difference]: Without dead ends: 5750 [2021-12-15 11:27:21,019 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-15 11:27:21,020 INFO L933 BasicCegarLoop]: 159 mSDtfsCounter, 168 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 523 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:27:21,021 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 523 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:27:21,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5750 states. [2021-12-15 11:27:21,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5750 to 2982. [2021-12-15 11:27:21,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2982 states, 2981 states have (on average 1.461590070446159) internal successors, (4357), 2981 states have internal predecessors, (4357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:27:21,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2982 states to 2982 states and 4357 transitions. [2021-12-15 11:27:21,206 INFO L78 Accepts]: Start accepts. Automaton has 2982 states and 4357 transitions. Word has length 42 [2021-12-15 11:27:21,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:27:21,206 INFO L470 AbstractCegarLoop]: Abstraction has 2982 states and 4357 transitions. [2021-12-15 11:27:21,206 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:27:21,207 INFO L276 IsEmpty]: Start isEmpty. Operand 2982 states and 4357 transitions. [2021-12-15 11:27:21,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-15 11:27:21,207 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:27:21,207 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] [2021-12-15 11:27:21,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-15 11:27:21,208 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:27:21,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:27:21,208 INFO L85 PathProgramCache]: Analyzing trace with hash -382704394, now seen corresponding path program 1 times [2021-12-15 11:27:21,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:27:21,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38914744] [2021-12-15 11:27:21,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:27:21,209 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:27:21,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:27:21,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:27:21,232 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:27:21,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38914744] [2021-12-15 11:27:21,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38914744] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:27:21,232 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:27:21,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:27:21,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413350612] [2021-12-15 11:27:21,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:27:21,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:27:21,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:27:21,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:27:21,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:27:21,234 INFO L87 Difference]: Start difference. First operand 2982 states and 4357 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:27:21,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:27:21,399 INFO L93 Difference]: Finished difference Result 7124 states and 10403 transitions. [2021-12-15 11:27:21,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:27:21,400 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 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 43 [2021-12-15 11:27:21,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:27:21,412 INFO L225 Difference]: With dead ends: 7124 [2021-12-15 11:27:21,412 INFO L226 Difference]: Without dead ends: 4162 [2021-12-15 11:27:21,415 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:27:21,416 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 59 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:27:21,416 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 197 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:27:21,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4162 states. [2021-12-15 11:27:21,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4162 to 4160. [2021-12-15 11:27:21,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4160 states, 4159 states have (on average 1.4486655446020678) internal successors, (6025), 4159 states have internal predecessors, (6025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:27:21,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4160 states to 4160 states and 6025 transitions. [2021-12-15 11:27:21,636 INFO L78 Accepts]: Start accepts. Automaton has 4160 states and 6025 transitions. Word has length 43 [2021-12-15 11:27:21,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:27:21,636 INFO L470 AbstractCegarLoop]: Abstraction has 4160 states and 6025 transitions. [2021-12-15 11:27:21,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:27:21,637 INFO L276 IsEmpty]: Start isEmpty. Operand 4160 states and 6025 transitions. [2021-12-15 11:27:21,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-12-15 11:27:21,638 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:27:21,638 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:27:21,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-15 11:27:21,640 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:27:21,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:27:21,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1624116797, now seen corresponding path program 1 times [2021-12-15 11:27:21,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:27:21,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758158486] [2021-12-15 11:27:21,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:27:21,641 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:27:21,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:27:21,750 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 11:27:21,750 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:27:21,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758158486] [2021-12-15 11:27:21,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758158486] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 11:27:21,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32315403] [2021-12-15 11:27:21,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:27:21,751 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 11:27:21,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 11:27:21,752 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 11:27:21,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-15 11:27:21,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:27:21,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-15 11:27:21,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 11:27:22,004 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 11:27:22,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 11:27:22,288 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 11:27:22,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32315403] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 11:27:22,288 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 11:27:22,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 5] total 10 [2021-12-15 11:27:22,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554838573] [2021-12-15 11:27:22,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 11:27:22,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-15 11:27:22,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:27:22,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-15 11:27:22,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2021-12-15 11:27:22,290 INFO L87 Difference]: Start difference. First operand 4160 states and 6025 transitions. Second operand has 10 states, 10 states have (on average 15.2) internal successors, (152), 10 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:27:22,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:27:22,756 INFO L93 Difference]: Finished difference Result 12995 states and 18966 transitions. [2021-12-15 11:27:22,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-15 11:27:22,757 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 15.2) internal successors, (152), 10 states have internal predecessors, (152), 0 states have call successors, (0), 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 60 [2021-12-15 11:27:22,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:27:22,788 INFO L225 Difference]: With dead ends: 12995 [2021-12-15 11:27:22,788 INFO L226 Difference]: Without dead ends: 10033 [2021-12-15 11:27:22,794 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=50, Invalid=60, Unknown=0, NotChecked=0, Total=110 [2021-12-15 11:27:22,794 INFO L933 BasicCegarLoop]: 154 mSDtfsCounter, 622 mSDsluCounter, 653 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 622 SdHoareTripleChecker+Valid, 807 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:27:22,794 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [622 Valid, 807 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:27:22,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10033 states. [2021-12-15 11:27:23,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10033 to 9568. [2021-12-15 11:27:23,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9568 states, 9567 states have (on average 1.4392181457092088) internal successors, (13769), 9567 states have internal predecessors, (13769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:27:23,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9568 states to 9568 states and 13769 transitions. [2021-12-15 11:27:23,354 INFO L78 Accepts]: Start accepts. Automaton has 9568 states and 13769 transitions. Word has length 60 [2021-12-15 11:27:23,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:27:23,355 INFO L470 AbstractCegarLoop]: Abstraction has 9568 states and 13769 transitions. [2021-12-15 11:27:23,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.2) internal successors, (152), 10 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:27:23,355 INFO L276 IsEmpty]: Start isEmpty. Operand 9568 states and 13769 transitions. [2021-12-15 11:27:23,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-15 11:27:23,357 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:27:23,357 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-15 11:27:23,376 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-15 11:27:23,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 11:27:23,575 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:27:23,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:27:23,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1000125924, now seen corresponding path program 1 times [2021-12-15 11:27:23,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:27:23,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863807615] [2021-12-15 11:27:23,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:27:23,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:27:23,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:27:23,621 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-15 11:27:23,622 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:27:23,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863807615] [2021-12-15 11:27:23,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863807615] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:27:23,622 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:27:23,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 11:27:23,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429844949] [2021-12-15 11:27:23,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:27:23,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 11:27:23,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:27:23,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 11:27:23,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 11:27:23,624 INFO L87 Difference]: Start difference. First operand 9568 states and 13769 transitions. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:27:24,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:27:24,114 INFO L93 Difference]: Finished difference Result 17580 states and 25411 transitions. [2021-12-15 11:27:24,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 11:27:24,114 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 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 61 [2021-12-15 11:27:24,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:27:24,147 INFO L225 Difference]: With dead ends: 17580 [2021-12-15 11:27:24,148 INFO L226 Difference]: Without dead ends: 14122 [2021-12-15 11:27:24,158 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-15 11:27:24,159 INFO L933 BasicCegarLoop]: 198 mSDtfsCounter, 311 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 515 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:27:24,159 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [311 Valid, 515 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:27:24,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14122 states. [2021-12-15 11:27:24,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14122 to 12596. [2021-12-15 11:27:24,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12596 states, 12595 states have (on average 1.433664152441445) internal successors, (18057), 12595 states have internal predecessors, (18057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:27:24,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12596 states to 12596 states and 18057 transitions. [2021-12-15 11:27:24,809 INFO L78 Accepts]: Start accepts. Automaton has 12596 states and 18057 transitions. Word has length 61 [2021-12-15 11:27:24,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:27:24,810 INFO L470 AbstractCegarLoop]: Abstraction has 12596 states and 18057 transitions. [2021-12-15 11:27:24,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:27:24,810 INFO L276 IsEmpty]: Start isEmpty. Operand 12596 states and 18057 transitions. [2021-12-15 11:27:24,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-15 11:27:24,812 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:27:24,812 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-15 11:27:24,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-15 11:27:24,813 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:27:24,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:27:24,813 INFO L85 PathProgramCache]: Analyzing trace with hash -876556853, now seen corresponding path program 1 times [2021-12-15 11:27:24,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:27:24,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579325814] [2021-12-15 11:27:24,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:27:24,814 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:27:24,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:27:24,853 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:27:24,853 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:27:24,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579325814] [2021-12-15 11:27:24,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579325814] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:27:24,854 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:27:24,854 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:27:24,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078951552] [2021-12-15 11:27:24,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:27:24,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:27:24,855 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:27:24,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:27:24,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:27:24,856 INFO L87 Difference]: Start difference. First operand 12596 states and 18057 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:27:25,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:27:25,451 INFO L93 Difference]: Finished difference Result 20241 states and 28876 transitions. [2021-12-15 11:27:25,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:27:25,452 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 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 61 [2021-12-15 11:27:25,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:27:25,479 INFO L225 Difference]: With dead ends: 20241 [2021-12-15 11:27:25,479 INFO L226 Difference]: Without dead ends: 13034 [2021-12-15 11:27:25,490 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:27:25,490 INFO L933 BasicCegarLoop]: 139 mSDtfsCounter, 59 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:27:25,491 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 234 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:27:25,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13034 states. [2021-12-15 11:27:26,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13034 to 12675. [2021-12-15 11:27:26,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12675 states, 12674 states have (on average 1.4024775130187785) internal successors, (17775), 12674 states have internal predecessors, (17775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:27:26,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12675 states to 12675 states and 17775 transitions. [2021-12-15 11:27:26,047 INFO L78 Accepts]: Start accepts. Automaton has 12675 states and 17775 transitions. Word has length 61 [2021-12-15 11:27:26,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:27:26,047 INFO L470 AbstractCegarLoop]: Abstraction has 12675 states and 17775 transitions. [2021-12-15 11:27:26,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:27:26,048 INFO L276 IsEmpty]: Start isEmpty. Operand 12675 states and 17775 transitions. [2021-12-15 11:27:26,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-15 11:27:26,051 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:27:26,051 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-15 11:27:26,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-15 11:27:26,052 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:27:26,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:27:26,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1922561508, now seen corresponding path program 1 times [2021-12-15 11:27:26,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:27:26,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101824527] [2021-12-15 11:27:26,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:27:26,053 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:27:26,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:27:26,080 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:27:26,080 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:27:26,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101824527] [2021-12-15 11:27:26,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101824527] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:27:26,080 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:27:26,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:27:26,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105110836] [2021-12-15 11:27:26,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:27:26,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:27:26,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:27:26,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:27:26,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:27:26,082 INFO L87 Difference]: Start difference. First operand 12675 states and 17775 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:27:26,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:27:26,754 INFO L93 Difference]: Finished difference Result 31013 states and 43309 transitions. [2021-12-15 11:27:26,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:27:26,755 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 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 61 [2021-12-15 11:27:26,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:27:26,792 INFO L225 Difference]: With dead ends: 31013 [2021-12-15 11:27:26,792 INFO L226 Difference]: Without dead ends: 21246 [2021-12-15 11:27:26,807 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:27:26,808 INFO L933 BasicCegarLoop]: 111 mSDtfsCounter, 56 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:27:26,808 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 214 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:27:26,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21246 states. [2021-12-15 11:27:27,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21246 to 21195. [2021-12-15 11:27:27,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21195 states, 21194 states have (on average 1.3782674341794847) internal successors, (29211), 21194 states have internal predecessors, (29211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:27:27,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21195 states to 21195 states and 29211 transitions. [2021-12-15 11:27:27,815 INFO L78 Accepts]: Start accepts. Automaton has 21195 states and 29211 transitions. Word has length 61 [2021-12-15 11:27:27,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:27:27,816 INFO L470 AbstractCegarLoop]: Abstraction has 21195 states and 29211 transitions. [2021-12-15 11:27:27,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:27:27,816 INFO L276 IsEmpty]: Start isEmpty. Operand 21195 states and 29211 transitions. [2021-12-15 11:27:27,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-15 11:27:27,819 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:27:27,819 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-15 11:27:27,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-15 11:27:27,819 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:27:27,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:27:27,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1875177684, now seen corresponding path program 1 times [2021-12-15 11:27:27,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:27:27,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893455179] [2021-12-15 11:27:27,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:27:27,820 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:27:27,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:27:27,855 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-15 11:27:27,855 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:27:27,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893455179] [2021-12-15 11:27:27,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893455179] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:27:27,856 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:27:27,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 11:27:27,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888100578] [2021-12-15 11:27:27,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:27:27,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 11:27:27,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:27:27,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 11:27:27,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 11:27:27,858 INFO L87 Difference]: Start difference. First operand 21195 states and 29211 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:27:28,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:27:28,805 INFO L93 Difference]: Finished difference Result 30654 states and 42662 transitions. [2021-12-15 11:27:28,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 11:27:28,806 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 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 61 [2021-12-15 11:27:28,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:27:28,861 INFO L225 Difference]: With dead ends: 30654 [2021-12-15 11:27:28,862 INFO L226 Difference]: Without dead ends: 27204 [2021-12-15 11:27:28,879 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-15 11:27:28,881 INFO L933 BasicCegarLoop]: 190 mSDtfsCounter, 318 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 498 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:27:28,881 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [318 Valid, 498 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:27:28,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27204 states. [2021-12-15 11:27:29,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27204 to 24483. [2021-12-15 11:27:29,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24483 states, 24482 states have (on average 1.3794216158810555) internal successors, (33771), 24482 states have internal predecessors, (33771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:27:29,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24483 states to 24483 states and 33771 transitions. [2021-12-15 11:27:29,978 INFO L78 Accepts]: Start accepts. Automaton has 24483 states and 33771 transitions. Word has length 61 [2021-12-15 11:27:29,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:27:29,979 INFO L470 AbstractCegarLoop]: Abstraction has 24483 states and 33771 transitions. [2021-12-15 11:27:29,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:27:29,979 INFO L276 IsEmpty]: Start isEmpty. Operand 24483 states and 33771 transitions. [2021-12-15 11:27:29,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-15 11:27:29,982 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:27:29,982 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-15 11:27:29,982 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-15 11:27:29,982 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:27:29,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:27:29,983 INFO L85 PathProgramCache]: Analyzing trace with hash -237073659, now seen corresponding path program 1 times [2021-12-15 11:27:29,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:27:29,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313575976] [2021-12-15 11:27:29,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:27:29,983 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:27:29,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:27:30,013 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 11:27:30,014 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:27:30,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313575976] [2021-12-15 11:27:30,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313575976] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:27:30,014 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:27:30,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 11:27:30,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363016794] [2021-12-15 11:27:30,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:27:30,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 11:27:30,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:27:30,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 11:27:30,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 11:27:30,016 INFO L87 Difference]: Start difference. First operand 24483 states and 33771 transitions. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:27:31,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:27:31,113 INFO L93 Difference]: Finished difference Result 38062 states and 52932 transitions. [2021-12-15 11:27:31,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 11:27:31,125 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 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 62 [2021-12-15 11:27:31,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:27:31,184 INFO L225 Difference]: With dead ends: 38062 [2021-12-15 11:27:31,184 INFO L226 Difference]: Without dead ends: 32051 [2021-12-15 11:27:31,202 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-15 11:27:31,203 INFO L933 BasicCegarLoop]: 198 mSDtfsCounter, 307 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 549 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:27:31,203 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [307 Valid, 549 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:27:31,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32051 states. [2021-12-15 11:27:32,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32051 to 29315. [2021-12-15 11:27:32,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29315 states, 29314 states have (on average 1.3746673944190488) internal successors, (40297), 29314 states have internal predecessors, (40297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:27:32,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29315 states to 29315 states and 40297 transitions. [2021-12-15 11:27:32,530 INFO L78 Accepts]: Start accepts. Automaton has 29315 states and 40297 transitions. Word has length 62 [2021-12-15 11:27:32,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:27:32,531 INFO L470 AbstractCegarLoop]: Abstraction has 29315 states and 40297 transitions. [2021-12-15 11:27:32,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:27:32,531 INFO L276 IsEmpty]: Start isEmpty. Operand 29315 states and 40297 transitions. [2021-12-15 11:27:32,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-15 11:27:32,534 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:27:32,534 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-15 11:27:32,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-15 11:27:32,535 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:27:32,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:27:32,535 INFO L85 PathProgramCache]: Analyzing trace with hash -1938404498, now seen corresponding path program 1 times [2021-12-15 11:27:32,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:27:32,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670508197] [2021-12-15 11:27:32,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:27:32,536 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:27:32,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:27:32,561 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:27:32,561 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:27:32,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670508197] [2021-12-15 11:27:32,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670508197] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:27:32,562 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:27:32,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:27:32,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027928622] [2021-12-15 11:27:32,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:27:32,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:27:32,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:27:32,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:27:32,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:27:32,565 INFO L87 Difference]: Start difference. First operand 29315 states and 40297 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:27:34,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:27:34,086 INFO L93 Difference]: Finished difference Result 57372 states and 78487 transitions. [2021-12-15 11:27:34,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:27:34,087 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 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 64 [2021-12-15 11:27:34,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:27:34,136 INFO L225 Difference]: With dead ends: 57372 [2021-12-15 11:27:34,136 INFO L226 Difference]: Without dead ends: 30133 [2021-12-15 11:27:34,167 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:27:34,167 INFO L933 BasicCegarLoop]: 156 mSDtfsCounter, 56 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:27:34,168 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 250 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:27:34,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30133 states. [2021-12-15 11:27:35,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30133 to 28786. [2021-12-15 11:27:35,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28786 states, 28785 states have (on average 1.3459440680910195) internal successors, (38743), 28785 states have internal predecessors, (38743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:27:35,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28786 states to 28786 states and 38743 transitions. [2021-12-15 11:27:35,356 INFO L78 Accepts]: Start accepts. Automaton has 28786 states and 38743 transitions. Word has length 64 [2021-12-15 11:27:35,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:27:35,356 INFO L470 AbstractCegarLoop]: Abstraction has 28786 states and 38743 transitions. [2021-12-15 11:27:35,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:27:35,357 INFO L276 IsEmpty]: Start isEmpty. Operand 28786 states and 38743 transitions. [2021-12-15 11:27:35,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-15 11:27:35,361 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:27:35,361 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-15 11:27:35,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-15 11:27:35,361 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:27:35,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:27:35,362 INFO L85 PathProgramCache]: Analyzing trace with hash 1057682816, now seen corresponding path program 1 times [2021-12-15 11:27:35,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:27:35,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248507319] [2021-12-15 11:27:35,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:27:35,362 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:27:35,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:27:35,395 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-15 11:27:35,395 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:27:35,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248507319] [2021-12-15 11:27:35,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248507319] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:27:35,396 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:27:35,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 11:27:35,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911600789] [2021-12-15 11:27:35,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:27:35,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 11:27:35,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:27:35,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 11:27:35,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 11:27:35,397 INFO L87 Difference]: Start difference. First operand 28786 states and 38743 transitions. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:27:37,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:27:37,265 INFO L93 Difference]: Finished difference Result 65902 states and 88551 transitions. [2021-12-15 11:27:37,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 11:27:37,265 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 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 66 [2021-12-15 11:27:37,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:27:37,319 INFO L225 Difference]: With dead ends: 65902 [2021-12-15 11:27:37,320 INFO L226 Difference]: Without dead ends: 37176 [2021-12-15 11:27:37,351 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-15 11:27:37,351 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 411 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 411 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 11:27:37,352 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [411 Valid, 135 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 11:27:37,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37176 states. [2021-12-15 11:27:38,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37176 to 36848. [2021-12-15 11:27:39,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36848 states, 36847 states have (on average 1.3290905636822536) internal successors, (48973), 36847 states have internal predecessors, (48973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:27:39,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36848 states to 36848 states and 48973 transitions. [2021-12-15 11:27:39,073 INFO L78 Accepts]: Start accepts. Automaton has 36848 states and 48973 transitions. Word has length 66 [2021-12-15 11:27:39,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:27:39,073 INFO L470 AbstractCegarLoop]: Abstraction has 36848 states and 48973 transitions. [2021-12-15 11:27:39,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:27:39,073 INFO L276 IsEmpty]: Start isEmpty. Operand 36848 states and 48973 transitions. [2021-12-15 11:27:39,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-15 11:27:39,077 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:27:39,077 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-15 11:27:39,078 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-15 11:27:39,078 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:27:39,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:27:39,078 INFO L85 PathProgramCache]: Analyzing trace with hash -1387170523, now seen corresponding path program 1 times [2021-12-15 11:27:39,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:27:39,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565217036] [2021-12-15 11:27:39,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:27:39,079 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:27:39,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:27:39,134 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:27:39,135 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:27:39,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565217036] [2021-12-15 11:27:39,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565217036] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 11:27:39,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033254001] [2021-12-15 11:27:39,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:27:39,135 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 11:27:39,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 11:27:39,139 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 11:27:39,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-15 11:27:39,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:27:39,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-15 11:27:39,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 11:27:39,433 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:27:39,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 11:27:39,537 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:27:39,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033254001] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 11:27:39,537 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 11:27:39,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2021-12-15 11:27:39,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714753367] [2021-12-15 11:27:39,538 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 11:27:39,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-15 11:27:39,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:27:39,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-15 11:27:39,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-12-15 11:27:39,539 INFO L87 Difference]: Start difference. First operand 36848 states and 48973 transitions. Second operand has 11 states, 11 states have (on average 10.090909090909092) internal successors, (111), 10 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:27:43,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:27:43,085 INFO L93 Difference]: Finished difference Result 88714 states and 117863 transitions. [2021-12-15 11:27:43,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-15 11:27:43,085 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 10.090909090909092) internal successors, (111), 10 states have internal predecessors, (111), 0 states have call successors, (0), 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 66 [2021-12-15 11:27:43,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:27:43,190 INFO L225 Difference]: With dead ends: 88714 [2021-12-15 11:27:43,190 INFO L226 Difference]: Without dead ends: 61987 [2021-12-15 11:27:43,237 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 126 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2021-12-15 11:27:43,238 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 2355 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2355 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 11:27:43,238 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2355 Valid, 243 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 11:27:43,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61987 states. [2021-12-15 11:27:45,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61987 to 37412. [2021-12-15 11:27:45,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37412 states, 37411 states have (on average 1.3362647349709977) internal successors, (49991), 37411 states have internal predecessors, (49991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:27:45,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37412 states to 37412 states and 49991 transitions. [2021-12-15 11:27:45,541 INFO L78 Accepts]: Start accepts. Automaton has 37412 states and 49991 transitions. Word has length 66 [2021-12-15 11:27:45,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:27:45,542 INFO L470 AbstractCegarLoop]: Abstraction has 37412 states and 49991 transitions. [2021-12-15 11:27:45,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.090909090909092) internal successors, (111), 10 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:27:45,542 INFO L276 IsEmpty]: Start isEmpty. Operand 37412 states and 49991 transitions. [2021-12-15 11:27:45,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-15 11:27:45,546 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:27:45,546 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-15 11:27:45,563 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-15 11:27:45,755 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,SelfDestructingSolverStorable16 [2021-12-15 11:27:45,756 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:27:45,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:27:45,756 INFO L85 PathProgramCache]: Analyzing trace with hash -929496895, now seen corresponding path program 1 times [2021-12-15 11:27:45,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:27:45,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143846066] [2021-12-15 11:27:45,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:27:45,757 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:27:45,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:27:45,803 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:27:45,804 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:27:45,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143846066] [2021-12-15 11:27:45,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143846066] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 11:27:45,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718025404] [2021-12-15 11:27:45,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:27:45,804 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 11:27:45,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 11:27:45,806 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 11:27:45,807 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-15 11:27:45,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:27:45,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-15 11:27:45,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 11:27:46,089 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:27:46,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 11:27:46,206 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:27:46,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718025404] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 11:27:46,206 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 11:27:46,206 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2021-12-15 11:27:46,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166458578] [2021-12-15 11:27:46,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 11:27:46,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-15 11:27:46,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:27:46,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-15 11:27:46,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-12-15 11:27:46,208 INFO L87 Difference]: Start difference. First operand 37412 states and 49991 transitions. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:27:49,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:27:49,293 INFO L93 Difference]: Finished difference Result 84193 states and 111526 transitions. [2021-12-15 11:27:49,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-15 11:27:49,294 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 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 67 [2021-12-15 11:27:49,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:27:49,394 INFO L225 Difference]: With dead ends: 84193 [2021-12-15 11:27:49,394 INFO L226 Difference]: Without dead ends: 53611 [2021-12-15 11:27:49,435 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 128 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2021-12-15 11:27:49,435 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 1530 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1530 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 11:27:49,435 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1530 Valid, 272 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 11:27:49,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53611 states. [2021-12-15 11:27:51,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53611 to 37842. [2021-12-15 11:27:51,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37842 states, 37841 states have (on average 1.3269998150154594) internal successors, (50215), 37841 states have internal predecessors, (50215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:27:51,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37842 states to 37842 states and 50215 transitions. [2021-12-15 11:27:51,787 INFO L78 Accepts]: Start accepts. Automaton has 37842 states and 50215 transitions. Word has length 67 [2021-12-15 11:27:51,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:27:51,787 INFO L470 AbstractCegarLoop]: Abstraction has 37842 states and 50215 transitions. [2021-12-15 11:27:51,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:27:51,788 INFO L276 IsEmpty]: Start isEmpty. Operand 37842 states and 50215 transitions. [2021-12-15 11:27:51,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-15 11:27:51,792 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:27:51,792 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-15 11:27:51,812 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-15 11:27:52,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-15 11:27:52,008 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:27:52,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:27:52,008 INFO L85 PathProgramCache]: Analyzing trace with hash -2073252700, now seen corresponding path program 1 times [2021-12-15 11:27:52,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:27:52,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434018036] [2021-12-15 11:27:52,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:27:52,008 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:27:52,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:27:52,052 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:27:52,052 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:27:52,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434018036] [2021-12-15 11:27:52,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434018036] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 11:27:52,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861983299] [2021-12-15 11:27:52,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:27:52,053 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 11:27:52,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 11:27:52,054 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 11:27:52,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-15 11:27:52,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:27:52,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-15 11:27:52,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 11:27:52,350 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:27:52,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 11:27:52,456 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:27:52,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861983299] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 11:27:52,456 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 11:27:52,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2021-12-15 11:27:52,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325635354] [2021-12-15 11:27:52,457 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 11:27:52,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-15 11:27:52,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:27:52,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-15 11:27:52,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-12-15 11:27:52,458 INFO L87 Difference]: Start difference. First operand 37842 states and 50215 transitions. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:27:57,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:27:57,074 INFO L93 Difference]: Finished difference Result 91819 states and 120942 transitions. [2021-12-15 11:27:57,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-15 11:27:57,074 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 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 67 [2021-12-15 11:27:57,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:27:57,198 INFO L225 Difference]: With dead ends: 91819 [2021-12-15 11:27:57,198 INFO L226 Difference]: Without dead ends: 71231 [2021-12-15 11:27:57,228 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 128 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2021-12-15 11:27:57,228 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 849 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 849 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 11:27:57,228 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [849 Valid, 374 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-15 11:27:57,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71231 states. [2021-12-15 11:28:00,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71231 to 42998. [2021-12-15 11:28:00,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42998 states, 42997 states have (on average 1.3249761611275206) internal successors, (56970), 42997 states have internal predecessors, (56970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:28:00,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42998 states to 42998 states and 56970 transitions. [2021-12-15 11:28:00,386 INFO L78 Accepts]: Start accepts. Automaton has 42998 states and 56970 transitions. Word has length 67 [2021-12-15 11:28:00,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:28:00,386 INFO L470 AbstractCegarLoop]: Abstraction has 42998 states and 56970 transitions. [2021-12-15 11:28:00,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:28:00,387 INFO L276 IsEmpty]: Start isEmpty. Operand 42998 states and 56970 transitions. [2021-12-15 11:28:00,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-15 11:28:00,392 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:28:00,392 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-15 11:28:00,408 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-15 11:28:00,602 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 11:28:00,602 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:28:00,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:28:00,603 INFO L85 PathProgramCache]: Analyzing trace with hash 1719826038, now seen corresponding path program 1 times [2021-12-15 11:28:00,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:28:00,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519757583] [2021-12-15 11:28:00,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:28:00,603 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:28:00,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:28:00,804 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:28:00,804 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:28:00,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519757583] [2021-12-15 11:28:00,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519757583] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:28:00,805 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:28:00,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:28:00,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229044095] [2021-12-15 11:28:00,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:28:00,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:28:00,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:28:00,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:28:00,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:28:00,807 INFO L87 Difference]: Start difference. First operand 42998 states and 56970 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:28:02,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:28:02,945 INFO L93 Difference]: Finished difference Result 49654 states and 65371 transitions. [2021-12-15 11:28:02,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:28:02,950 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 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 69 [2021-12-15 11:28:02,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:28:02,997 INFO L225 Difference]: With dead ends: 49654 [2021-12-15 11:28:02,997 INFO L226 Difference]: Without dead ends: 33592 [2021-12-15 11:28:03,015 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:28:03,016 INFO L933 BasicCegarLoop]: 176 mSDtfsCounter, 60 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:28:03,016 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 264 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:28:03,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33592 states. [2021-12-15 11:28:05,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33592 to 33573. [2021-12-15 11:28:05,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33573 states, 33572 states have (on average 1.3002799952341237) internal successors, (43653), 33572 states have internal predecessors, (43653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:28:05,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33573 states to 33573 states and 43653 transitions. [2021-12-15 11:28:05,111 INFO L78 Accepts]: Start accepts. Automaton has 33573 states and 43653 transitions. Word has length 69 [2021-12-15 11:28:05,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:28:05,111 INFO L470 AbstractCegarLoop]: Abstraction has 33573 states and 43653 transitions. [2021-12-15 11:28:05,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:28:05,111 INFO L276 IsEmpty]: Start isEmpty. Operand 33573 states and 43653 transitions. [2021-12-15 11:28:05,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-15 11:28:05,116 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:28:05,116 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-15 11:28:05,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-15 11:28:05,116 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:28:05,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:28:05,116 INFO L85 PathProgramCache]: Analyzing trace with hash 379264655, now seen corresponding path program 1 times [2021-12-15 11:28:05,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:28:05,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528732864] [2021-12-15 11:28:05,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:28:05,117 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:28:05,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:28:05,212 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:28:05,212 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:28:05,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528732864] [2021-12-15 11:28:05,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528732864] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 11:28:05,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36366206] [2021-12-15 11:28:05,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:28:05,213 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 11:28:05,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 11:28:05,224 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 11:28:05,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-15 11:28:05,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:28:05,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-15 11:28:05,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 11:28:05,916 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:28:05,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 11:28:06,480 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:28:06,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36366206] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 11:28:06,481 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 11:28:06,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 26 [2021-12-15 11:28:06,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460772269] [2021-12-15 11:28:06,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 11:28:06,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-15 11:28:06,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:28:06,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-15 11:28:06,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=568, Unknown=0, NotChecked=0, Total=702 [2021-12-15 11:28:06,482 INFO L87 Difference]: Start difference. First operand 33573 states and 43653 transitions. Second operand has 27 states, 27 states have (on average 6.111111111111111) internal successors, (165), 26 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:28:17,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:28:17,330 INFO L93 Difference]: Finished difference Result 151703 states and 195365 transitions. [2021-12-15 11:28:17,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-12-15 11:28:17,331 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 6.111111111111111) internal successors, (165), 26 states have internal predecessors, (165), 0 states have call successors, (0), 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 69 [2021-12-15 11:28:17,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:28:17,551 INFO L225 Difference]: With dead ends: 151703 [2021-12-15 11:28:17,551 INFO L226 Difference]: Without dead ends: 118159 [2021-12-15 11:28:17,603 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 119 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1086 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1229, Invalid=3327, Unknown=0, NotChecked=0, Total=4556 [2021-12-15 11:28:17,604 INFO L933 BasicCegarLoop]: 168 mSDtfsCounter, 1734 mSDsluCounter, 1103 mSDsCounter, 0 mSdLazyCounter, 1392 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1734 SdHoareTripleChecker+Valid, 1271 SdHoareTripleChecker+Invalid, 1440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-15 11:28:17,604 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1734 Valid, 1271 Invalid, 1440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1392 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-15 11:28:17,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118159 states. [2021-12-15 11:28:22,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118159 to 53505. [2021-12-15 11:28:22,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53505 states, 53504 states have (on average 1.3009681519138756) internal successors, (69607), 53504 states have internal predecessors, (69607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:28:22,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53505 states to 53505 states and 69607 transitions. [2021-12-15 11:28:22,639 INFO L78 Accepts]: Start accepts. Automaton has 53505 states and 69607 transitions. Word has length 69 [2021-12-15 11:28:22,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:28:22,640 INFO L470 AbstractCegarLoop]: Abstraction has 53505 states and 69607 transitions. [2021-12-15 11:28:22,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 6.111111111111111) internal successors, (165), 26 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:28:22,640 INFO L276 IsEmpty]: Start isEmpty. Operand 53505 states and 69607 transitions. [2021-12-15 11:28:22,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-15 11:28:22,645 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:28:22,645 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-15 11:28:22,661 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-15 11:28:22,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 11:28:22,848 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:28:22,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:28:22,848 INFO L85 PathProgramCache]: Analyzing trace with hash -1497418122, now seen corresponding path program 1 times [2021-12-15 11:28:22,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:28:22,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377942295] [2021-12-15 11:28:22,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:28:22,849 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:28:22,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:28:22,962 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:28:22,963 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:28:22,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377942295] [2021-12-15 11:28:22,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377942295] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 11:28:22,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517015384] [2021-12-15 11:28:22,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:28:22,964 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 11:28:22,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 11:28:22,965 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 11:28:22,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-15 11:28:23,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:28:23,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-15 11:28:23,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 11:28:23,513 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:28:23,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 11:28:23,977 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:28:23,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517015384] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 11:28:23,978 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 11:28:23,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2021-12-15 11:28:23,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509055896] [2021-12-15 11:28:23,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 11:28:23,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-15 11:28:23,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:28:23,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-15 11:28:23,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-12-15 11:28:23,980 INFO L87 Difference]: Start difference. First operand 53505 states and 69607 transitions. Second operand has 23 states, 23 states have (on average 6.565217391304348) internal successors, (151), 22 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)