./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem03_label11.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7e70badd Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9098e8-6cea-42b6-894f-a594b6fe8909/bin/uautomizer-wIGwrQj20G/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9098e8-6cea-42b6-894f-a594b6fe8909/bin/uautomizer-wIGwrQj20G/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9098e8-6cea-42b6-894f-a594b6fe8909/bin/uautomizer-wIGwrQj20G/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9098e8-6cea-42b6-894f-a594b6fe8909/bin/uautomizer-wIGwrQj20G/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem03_label11.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9098e8-6cea-42b6-894f-a594b6fe8909/bin/uautomizer-wIGwrQj20G/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9098e8-6cea-42b6-894f-a594b6fe8909/bin/uautomizer-wIGwrQj20G --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 698befc2b2b3848a03ec5b9664ba6dadb47a33cbe123de396a3ce9bbb5d1873c --- Real Ultimate output --- This is Ultimate 0.2.1-dev-7e70bad [2021-11-23 14:17:12,399 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 14:17:12,402 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 14:17:12,464 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 14:17:12,465 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 14:17:12,470 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 14:17:12,472 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 14:17:12,476 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 14:17:12,479 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 14:17:12,485 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 14:17:12,486 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 14:17:12,488 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 14:17:12,489 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 14:17:12,492 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 14:17:12,494 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 14:17:12,500 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 14:17:12,502 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 14:17:12,503 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 14:17:12,506 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 14:17:12,515 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 14:17:12,517 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 14:17:12,519 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 14:17:12,522 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 14:17:12,523 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 14:17:12,533 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 14:17:12,534 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 14:17:12,534 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 14:17:12,536 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 14:17:12,537 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 14:17:12,539 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 14:17:12,540 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 14:17:12,548 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 14:17:12,550 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 14:17:12,551 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 14:17:12,553 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 14:17:12,554 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 14:17:12,554 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 14:17:12,555 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 14:17:12,555 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 14:17:12,556 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 14:17:12,558 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 14:17:12,559 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9098e8-6cea-42b6-894f-a594b6fe8909/bin/uautomizer-wIGwrQj20G/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-23 14:17:12,611 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 14:17:12,612 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 14:17:12,612 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 14:17:12,613 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 14:17:12,614 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 14:17:12,614 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 14:17:12,615 INFO L138 SettingsManager]: * Use SBE=true [2021-11-23 14:17:12,615 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 14:17:12,615 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 14:17:12,616 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 14:17:12,617 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 14:17:12,617 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 14:17:12,618 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 14:17:12,618 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 14:17:12,618 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 14:17:12,619 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 14:17:12,619 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 14:17:12,619 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 14:17:12,619 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 14:17:12,620 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 14:17:12,620 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 14:17:12,620 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 14:17:12,621 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 14:17:12,621 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 14:17:12,621 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 14:17:12,622 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 14:17:12,622 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-23 14:17:12,622 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 14:17:12,623 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-23 14:17:12,624 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-23 14:17:12,625 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 14:17:12,625 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 14:17:12,625 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:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9098e8-6cea-42b6-894f-a594b6fe8909/bin/uautomizer-wIGwrQj20G/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9098e8-6cea-42b6-894f-a594b6fe8909/bin/uautomizer-wIGwrQj20G Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 698befc2b2b3848a03ec5b9664ba6dadb47a33cbe123de396a3ce9bbb5d1873c [2021-11-23 14:17:12,896 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 14:17:12,918 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 14:17:12,920 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 14:17:12,922 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 14:17:12,922 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 14:17:12,924 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9098e8-6cea-42b6-894f-a594b6fe8909/bin/uautomizer-wIGwrQj20G/../../sv-benchmarks/c/eca-rers2012/Problem03_label11.c [2021-11-23 14:17:12,982 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9098e8-6cea-42b6-894f-a594b6fe8909/bin/uautomizer-wIGwrQj20G/data/6652a05ef/95ead317cc4748349e2a160a1f3469a3/FLAGa843429e1 [2021-11-23 14:17:13,760 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 14:17:13,761 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9098e8-6cea-42b6-894f-a594b6fe8909/sv-benchmarks/c/eca-rers2012/Problem03_label11.c [2021-11-23 14:17:13,786 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9098e8-6cea-42b6-894f-a594b6fe8909/bin/uautomizer-wIGwrQj20G/data/6652a05ef/95ead317cc4748349e2a160a1f3469a3/FLAGa843429e1 [2021-11-23 14:17:13,877 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9098e8-6cea-42b6-894f-a594b6fe8909/bin/uautomizer-wIGwrQj20G/data/6652a05ef/95ead317cc4748349e2a160a1f3469a3 [2021-11-23 14:17:13,879 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 14:17:13,880 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 14:17:13,884 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 14:17:13,885 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 14:17:13,889 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 14:17:13,890 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:17:13" (1/1) ... [2021-11-23 14:17:13,891 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f1693f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:17:13, skipping insertion in model container [2021-11-23 14:17:13,891 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:17:13" (1/1) ... [2021-11-23 14:17:13,900 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 14:17:13,992 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 14:17:14,692 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9098e8-6cea-42b6-894f-a594b6fe8909/sv-benchmarks/c/eca-rers2012/Problem03_label11.c[60283,60296] [2021-11-23 14:17:14,737 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 14:17:14,750 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 14:17:14,999 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9098e8-6cea-42b6-894f-a594b6fe8909/sv-benchmarks/c/eca-rers2012/Problem03_label11.c[60283,60296] [2021-11-23 14:17:15,008 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 14:17:15,028 INFO L208 MainTranslator]: Completed translation [2021-11-23 14:17:15,029 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:17:15 WrapperNode [2021-11-23 14:17:15,029 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 14:17:15,030 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 14:17:15,031 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 14:17:15,031 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 14:17:15,038 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:17:15" (1/1) ... [2021-11-23 14:17:15,089 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:17:15" (1/1) ... [2021-11-23 14:17:15,186 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1771 [2021-11-23 14:17:15,186 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 14:17:15,187 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 14:17:15,187 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 14:17:15,188 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 14:17:15,196 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:17:15" (1/1) ... [2021-11-23 14:17:15,196 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:17:15" (1/1) ... [2021-11-23 14:17:15,204 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:17:15" (1/1) ... [2021-11-23 14:17:15,204 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:17:15" (1/1) ... [2021-11-23 14:17:15,260 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:17:15" (1/1) ... [2021-11-23 14:17:15,286 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:17:15" (1/1) ... [2021-11-23 14:17:15,327 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:17:15" (1/1) ... [2021-11-23 14:17:15,342 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 14:17:15,343 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 14:17:15,344 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 14:17:15,344 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 14:17:15,348 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:17:15" (1/1) ... [2021-11-23 14:17:15,355 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 14:17:15,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9098e8-6cea-42b6-894f-a594b6fe8909/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 14:17:15,385 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9098e8-6cea-42b6-894f-a594b6fe8909/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 14:17:15,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9098e8-6cea-42b6-894f-a594b6fe8909/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 14:17:15,441 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 14:17:15,441 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 14:17:15,441 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 14:17:15,442 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 14:17:15,573 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 14:17:15,574 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 14:17:17,426 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 14:17:17,437 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 14:17:17,438 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 14:17:17,440 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:17:17 BoogieIcfgContainer [2021-11-23 14:17:17,440 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 14:17:17,442 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 14:17:17,443 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 14:17:17,446 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 14:17:17,446 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:17:13" (1/3) ... [2021-11-23 14:17:17,447 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3da55d53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:17:17, skipping insertion in model container [2021-11-23 14:17:17,447 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:17:15" (2/3) ... [2021-11-23 14:17:17,448 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3da55d53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:17:17, skipping insertion in model container [2021-11-23 14:17:17,448 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:17:17" (3/3) ... [2021-11-23 14:17:17,449 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem03_label11.c [2021-11-23 14:17:17,455 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 14:17:17,455 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 14:17:17,507 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 14:17:17,514 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 [2021-11-23 14:17:17,514 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 14:17:17,545 INFO L276 IsEmpty]: Start isEmpty. Operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:17:17,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2021-11-23 14:17:17,585 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:17:17,586 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:17:17,586 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:17:17,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:17:17,592 INFO L85 PathProgramCache]: Analyzing trace with hash -448621317, now seen corresponding path program 1 times [2021-11-23 14:17:17,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:17:17,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533051861] [2021-11-23 14:17:17,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:17:17,603 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:17:17,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:17:18,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:17:18,307 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:17:18,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533051861] [2021-11-23 14:17:18,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533051861] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:17:18,309 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:17:18,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 14:17:18,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338977357] [2021-11-23 14:17:18,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:17:18,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 14:17:18,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:17:18,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 14:17:18,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 14:17:18,359 INFO L87 Difference]: Start difference. First operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 2 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:17:19,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:17:19,690 INFO L93 Difference]: Finished difference Result 810 states and 1445 transitions. [2021-11-23 14:17:19,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 14:17:19,694 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 2 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 193 [2021-11-23 14:17:19,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:17:19,710 INFO L225 Difference]: With dead ends: 810 [2021-11-23 14:17:19,710 INFO L226 Difference]: Without dead ends: 444 [2021-11-23 14:17:19,715 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 14:17:19,718 INFO L933 BasicCegarLoop]: 194 mSDtfsCounter, 61 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 628 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 814 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 628 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-23 14:17:19,720 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 231 Invalid, 814 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 628 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-23 14:17:19,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2021-11-23 14:17:19,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 444. [2021-11-23 14:17:19,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 443 states have (on average 1.4288939051918736) internal successors, (633), 443 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:17:19,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 633 transitions. [2021-11-23 14:17:19,789 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 633 transitions. Word has length 193 [2021-11-23 14:17:19,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:17:19,790 INFO L470 AbstractCegarLoop]: Abstraction has 444 states and 633 transitions. [2021-11-23 14:17:19,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 2 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:17:19,791 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 633 transitions. [2021-11-23 14:17:19,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2021-11-23 14:17:19,796 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:17:19,797 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:17:19,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 14:17:19,797 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:17:19,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:17:19,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1711270716, now seen corresponding path program 1 times [2021-11-23 14:17:19,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:17:19,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581301845] [2021-11-23 14:17:19,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:17:19,799 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:17:19,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:17:19,916 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:17:19,919 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:17:19,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581301845] [2021-11-23 14:17:19,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581301845] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:17:19,921 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:17:19,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 14:17:19,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070284449] [2021-11-23 14:17:19,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:17:19,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 14:17:19,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:17:19,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 14:17:19,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 14:17:19,927 INFO L87 Difference]: Start difference. First operand 444 states and 633 transitions. Second operand has 3 states, 3 states have (on average 67.0) internal successors, (201), 2 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:17:20,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:17:20,840 INFO L93 Difference]: Finished difference Result 1312 states and 1878 transitions. [2021-11-23 14:17:20,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 14:17:20,841 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 67.0) internal successors, (201), 2 states have internal predecessors, (201), 0 states have call successors, (0), 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 201 [2021-11-23 14:17:20,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:17:20,847 INFO L225 Difference]: With dead ends: 1312 [2021-11-23 14:17:20,848 INFO L226 Difference]: Without dead ends: 870 [2021-11-23 14:17:20,849 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 14:17:20,851 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 249 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-23 14:17:20,852 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 90 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-23 14:17:20,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 870 states. [2021-11-23 14:17:20,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 870 to 856. [2021-11-23 14:17:20,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 856 states, 855 states have (on average 1.3953216374269006) internal successors, (1193), 855 states have internal predecessors, (1193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:17:20,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 856 states to 856 states and 1193 transitions. [2021-11-23 14:17:20,901 INFO L78 Accepts]: Start accepts. Automaton has 856 states and 1193 transitions. Word has length 201 [2021-11-23 14:17:20,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:17:20,902 INFO L470 AbstractCegarLoop]: Abstraction has 856 states and 1193 transitions. [2021-11-23 14:17:20,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.0) internal successors, (201), 2 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:17:20,902 INFO L276 IsEmpty]: Start isEmpty. Operand 856 states and 1193 transitions. [2021-11-23 14:17:20,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2021-11-23 14:17:20,908 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:17:20,909 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:17:20,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 14:17:20,909 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:17:20,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:17:20,910 INFO L85 PathProgramCache]: Analyzing trace with hash -2070037263, now seen corresponding path program 1 times [2021-11-23 14:17:20,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:17:20,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348603130] [2021-11-23 14:17:20,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:17:20,911 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:17:20,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:17:21,254 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 14:17:21,254 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:17:21,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348603130] [2021-11-23 14:17:21,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348603130] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:17:21,255 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:17:21,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 14:17:21,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611257760] [2021-11-23 14:17:21,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:17:21,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 14:17:21,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:17:21,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 14:17:21,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 14:17:21,258 INFO L87 Difference]: Start difference. First operand 856 states and 1193 transitions. Second operand has 4 states, 4 states have (on average 50.75) internal successors, (203), 3 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:17:22,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:17:22,377 INFO L93 Difference]: Finished difference Result 1864 states and 2652 transitions. [2021-11-23 14:17:22,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 14:17:22,378 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 50.75) internal successors, (203), 3 states have internal predecessors, (203), 0 states have call successors, (0), 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 208 [2021-11-23 14:17:22,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:17:22,384 INFO L225 Difference]: With dead ends: 1864 [2021-11-23 14:17:22,384 INFO L226 Difference]: Without dead ends: 836 [2021-11-23 14:17:22,386 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 14:17:22,387 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 300 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 802 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 980 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 802 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-23 14:17:22,388 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [300 Valid, 47 Invalid, 980 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 802 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-23 14:17:22,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 836 states. [2021-11-23 14:17:22,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 836 to 836. [2021-11-23 14:17:22,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 836 states, 835 states have (on average 1.2658682634730538) internal successors, (1057), 835 states have internal predecessors, (1057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:17:22,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 836 states to 836 states and 1057 transitions. [2021-11-23 14:17:22,414 INFO L78 Accepts]: Start accepts. Automaton has 836 states and 1057 transitions. Word has length 208 [2021-11-23 14:17:22,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:17:22,415 INFO L470 AbstractCegarLoop]: Abstraction has 836 states and 1057 transitions. [2021-11-23 14:17:22,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 50.75) internal successors, (203), 3 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:17:22,415 INFO L276 IsEmpty]: Start isEmpty. Operand 836 states and 1057 transitions. [2021-11-23 14:17:22,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2021-11-23 14:17:22,420 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:17:22,420 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:17:22,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 14:17:22,421 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:17:22,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:17:22,422 INFO L85 PathProgramCache]: Analyzing trace with hash -2139349419, now seen corresponding path program 1 times [2021-11-23 14:17:22,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:17:22,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829265858] [2021-11-23 14:17:22,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:17:22,423 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:17:22,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:17:22,520 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:17:22,520 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:17:22,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829265858] [2021-11-23 14:17:22,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829265858] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:17:22,521 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:17:22,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 14:17:22,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190096408] [2021-11-23 14:17:22,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:17:22,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 14:17:22,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:17:22,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 14:17:22,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 14:17:22,524 INFO L87 Difference]: Start difference. First operand 836 states and 1057 transitions. Second operand has 3 states, 3 states have (on average 73.66666666666667) internal successors, (221), 2 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:17:23,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:17:23,324 INFO L93 Difference]: Finished difference Result 2494 states and 3156 transitions. [2021-11-23 14:17:23,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 14:17:23,324 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 73.66666666666667) internal successors, (221), 2 states have internal predecessors, (221), 0 states have call successors, (0), 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 221 [2021-11-23 14:17:23,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:17:23,334 INFO L225 Difference]: With dead ends: 2494 [2021-11-23 14:17:23,334 INFO L226 Difference]: Without dead ends: 1660 [2021-11-23 14:17:23,335 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 14:17:23,337 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 206 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 567 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-23 14:17:23,337 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 62 Invalid, 613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 567 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-23 14:17:23,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1660 states. [2021-11-23 14:17:23,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1660 to 1654. [2021-11-23 14:17:23,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1654 states, 1653 states have (on average 1.2480338777979432) internal successors, (2063), 1653 states have internal predecessors, (2063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:17:23,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1654 states to 1654 states and 2063 transitions. [2021-11-23 14:17:23,384 INFO L78 Accepts]: Start accepts. Automaton has 1654 states and 2063 transitions. Word has length 221 [2021-11-23 14:17:23,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:17:23,384 INFO L470 AbstractCegarLoop]: Abstraction has 1654 states and 2063 transitions. [2021-11-23 14:17:23,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.66666666666667) internal successors, (221), 2 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:17:23,385 INFO L276 IsEmpty]: Start isEmpty. Operand 1654 states and 2063 transitions. [2021-11-23 14:17:23,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2021-11-23 14:17:23,390 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:17:23,391 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:17:23,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 14:17:23,391 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:17:23,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:17:23,392 INFO L85 PathProgramCache]: Analyzing trace with hash 1439953932, now seen corresponding path program 1 times [2021-11-23 14:17:23,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:17:23,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428206831] [2021-11-23 14:17:23,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:17:23,393 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:17:23,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:17:23,637 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:17:23,638 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:17:23,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428206831] [2021-11-23 14:17:23,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428206831] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:17:23,638 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:17:23,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 14:17:23,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390728391] [2021-11-23 14:17:23,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:17:23,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 14:17:23,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:17:23,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 14:17:23,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 14:17:23,641 INFO L87 Difference]: Start difference. First operand 1654 states and 2063 transitions. Second operand has 4 states, 4 states have (on average 56.0) internal successors, (224), 3 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:17:24,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:17:24,922 INFO L93 Difference]: Finished difference Result 4301 states and 5381 transitions. [2021-11-23 14:17:24,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 14:17:24,922 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 56.0) internal successors, (224), 3 states have internal predecessors, (224), 0 states have call successors, (0), 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 224 [2021-11-23 14:17:24,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:17:24,936 INFO L225 Difference]: With dead ends: 4301 [2021-11-23 14:17:24,936 INFO L226 Difference]: Without dead ends: 2475 [2021-11-23 14:17:24,939 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 14:17:24,940 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 196 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 1017 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 1151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 1017 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-23 14:17:24,940 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 124 Invalid, 1151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 1017 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-23 14:17:24,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2475 states. [2021-11-23 14:17:24,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2475 to 2474. [2021-11-23 14:17:24,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2474 states, 2473 states have (on average 1.2365547917509099) internal successors, (3058), 2473 states have internal predecessors, (3058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:17:25,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2474 states to 2474 states and 3058 transitions. [2021-11-23 14:17:25,008 INFO L78 Accepts]: Start accepts. Automaton has 2474 states and 3058 transitions. Word has length 224 [2021-11-23 14:17:25,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:17:25,009 INFO L470 AbstractCegarLoop]: Abstraction has 2474 states and 3058 transitions. [2021-11-23 14:17:25,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 56.0) internal successors, (224), 3 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:17:25,009 INFO L276 IsEmpty]: Start isEmpty. Operand 2474 states and 3058 transitions. [2021-11-23 14:17:25,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2021-11-23 14:17:25,017 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:17:25,017 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:17:25,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 14:17:25,017 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:17:25,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:17:25,018 INFO L85 PathProgramCache]: Analyzing trace with hash -1990916425, now seen corresponding path program 1 times [2021-11-23 14:17:25,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:17:25,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635394764] [2021-11-23 14:17:25,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:17:25,019 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:17:25,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:17:25,118 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 37 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:17:25,118 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:17:25,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635394764] [2021-11-23 14:17:25,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635394764] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 14:17:25,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174326567] [2021-11-23 14:17:25,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:17:25,119 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:17:25,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9098e8-6cea-42b6-894f-a594b6fe8909/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 14:17:25,124 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9098e8-6cea-42b6-894f-a594b6fe8909/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 14:17:25,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9098e8-6cea-42b6-894f-a594b6fe8909/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 14:17:25,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:17:25,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 14:17:25,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 14:17:25,839 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-23 14:17:25,839 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 14:17:25,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174326567] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:17:25,840 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 14:17:25,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-11-23 14:17:25,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344936903] [2021-11-23 14:17:25,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:17:25,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 14:17:25,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:17:25,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 14:17:25,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 14:17:25,842 INFO L87 Difference]: Start difference. First operand 2474 states and 3058 transitions. Second operand has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:17:26,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:17:26,621 INFO L93 Difference]: Finished difference Result 4751 states and 5909 transitions. [2021-11-23 14:17:26,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 14:17:26,622 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 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 231 [2021-11-23 14:17:26,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:17:26,635 INFO L225 Difference]: With dead ends: 4751 [2021-11-23 14:17:26,635 INFO L226 Difference]: Without dead ends: 2279 [2021-11-23 14:17:26,638 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 14:17:26,639 INFO L933 BasicCegarLoop]: 276 mSDtfsCounter, 31 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 558 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-23 14:17:26,640 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 291 Invalid, 623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 558 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-23 14:17:26,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2279 states. [2021-11-23 14:17:26,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2279 to 2271. [2021-11-23 14:17:26,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2271 states, 2270 states have (on average 1.2312775330396475) internal successors, (2795), 2270 states have internal predecessors, (2795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:17:26,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2271 states to 2271 states and 2795 transitions. [2021-11-23 14:17:26,699 INFO L78 Accepts]: Start accepts. Automaton has 2271 states and 2795 transitions. Word has length 231 [2021-11-23 14:17:26,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:17:26,700 INFO L470 AbstractCegarLoop]: Abstraction has 2271 states and 2795 transitions. [2021-11-23 14:17:26,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:17:26,701 INFO L276 IsEmpty]: Start isEmpty. Operand 2271 states and 2795 transitions. [2021-11-23 14:17:26,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2021-11-23 14:17:26,708 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:17:26,708 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:17:26,749 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9098e8-6cea-42b6-894f-a594b6fe8909/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 14:17:26,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9098e8-6cea-42b6-894f-a594b6fe8909/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-23 14:17:26,932 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:17:26,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:17:26,933 INFO L85 PathProgramCache]: Analyzing trace with hash -185737120, now seen corresponding path program 1 times [2021-11-23 14:17:26,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:17:26,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514158913] [2021-11-23 14:17:26,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:17:26,933 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:17:26,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:17:27,000 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-23 14:17:27,000 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:17:27,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514158913] [2021-11-23 14:17:27,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514158913] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:17:27,001 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:17:27,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 14:17:27,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106947517] [2021-11-23 14:17:27,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:17:27,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 14:17:27,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:17:27,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 14:17:27,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 14:17:27,003 INFO L87 Difference]: Start difference. First operand 2271 states and 2795 transitions. Second operand has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 2 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:17:27,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:17:27,798 INFO L93 Difference]: Finished difference Result 6796 states and 8367 transitions. [2021-11-23 14:17:27,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 14:17:27,802 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 2 states have internal predecessors, (206), 0 states have call successors, (0), 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 233 [2021-11-23 14:17:27,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:17:27,827 INFO L225 Difference]: With dead ends: 6796 [2021-11-23 14:17:27,827 INFO L226 Difference]: Without dead ends: 4527 [2021-11-23 14:17:27,831 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 14:17:27,832 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 245 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 607 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-23 14:17:27,832 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [245 Valid, 102 Invalid, 621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 607 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-23 14:17:27,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4527 states. [2021-11-23 14:17:27,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4527 to 4522. [2021-11-23 14:17:27,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4522 states, 4521 states have (on average 1.2227383322273833) internal successors, (5528), 4521 states have internal predecessors, (5528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:17:27,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4522 states to 4522 states and 5528 transitions. [2021-11-23 14:17:27,958 INFO L78 Accepts]: Start accepts. Automaton has 4522 states and 5528 transitions. Word has length 233 [2021-11-23 14:17:27,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:17:27,958 INFO L470 AbstractCegarLoop]: Abstraction has 4522 states and 5528 transitions. [2021-11-23 14:17:27,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 2 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:17:27,959 INFO L276 IsEmpty]: Start isEmpty. Operand 4522 states and 5528 transitions. [2021-11-23 14:17:27,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2021-11-23 14:17:27,969 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:17:27,970 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:17:27,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-23 14:17:27,970 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:17:27,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:17:27,971 INFO L85 PathProgramCache]: Analyzing trace with hash 2020426155, now seen corresponding path program 1 times [2021-11-23 14:17:27,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:17:27,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056287550] [2021-11-23 14:17:27,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:17:27,972 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:17:28,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:17:28,066 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 44 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 14:17:28,066 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:17:28,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056287550] [2021-11-23 14:17:28,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056287550] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 14:17:28,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011996727] [2021-11-23 14:17:28,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:17:28,067 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:17:28,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9098e8-6cea-42b6-894f-a594b6fe8909/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 14:17:28,072 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9098e8-6cea-42b6-894f-a594b6fe8909/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 14:17:28,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9098e8-6cea-42b6-894f-a594b6fe8909/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 14:17:28,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:17:28,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 14:17:28,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 14:17:28,534 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 14:17:28,534 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 14:17:28,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011996727] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:17:28,535 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 14:17:28,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-11-23 14:17:28,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538291458] [2021-11-23 14:17:28,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:17:28,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 14:17:28,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:17:28,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 14:17:28,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 14:17:28,537 INFO L87 Difference]: Start difference. First operand 4522 states and 5528 transitions. Second operand has 3 states, 3 states have (on average 77.33333333333333) internal successors, (232), 3 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:17:29,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:17:29,345 INFO L93 Difference]: Finished difference Result 10867 states and 13528 transitions. [2021-11-23 14:17:29,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 14:17:29,346 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 77.33333333333333) internal successors, (232), 3 states have internal predecessors, (232), 0 states have call successors, (0), 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 237 [2021-11-23 14:17:29,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:17:29,379 INFO L225 Difference]: With dead ends: 10867 [2021-11-23 14:17:29,379 INFO L226 Difference]: Without dead ends: 6347 [2021-11-23 14:17:29,385 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 14:17:29,388 INFO L933 BasicCegarLoop]: 317 mSDtfsCounter, 215 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-23 14:17:29,388 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 337 Invalid, 594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 491 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-23 14:17:29,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6347 states. [2021-11-23 14:17:29,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6347 to 6343. [2021-11-23 14:17:29,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6343 states, 6342 states have (on average 1.161147902869757) internal successors, (7364), 6342 states have internal predecessors, (7364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:17:29,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6343 states to 6343 states and 7364 transitions. [2021-11-23 14:17:29,562 INFO L78 Accepts]: Start accepts. Automaton has 6343 states and 7364 transitions. Word has length 237 [2021-11-23 14:17:29,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:17:29,563 INFO L470 AbstractCegarLoop]: Abstraction has 6343 states and 7364 transitions. [2021-11-23 14:17:29,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.33333333333333) internal successors, (232), 3 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:17:29,564 INFO L276 IsEmpty]: Start isEmpty. Operand 6343 states and 7364 transitions. [2021-11-23 14:17:29,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2021-11-23 14:17:29,580 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:17:29,580 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:17:29,619 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9098e8-6cea-42b6-894f-a594b6fe8909/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 14:17:29,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9098e8-6cea-42b6-894f-a594b6fe8909/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:17:29,808 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:17:29,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:17:29,808 INFO L85 PathProgramCache]: Analyzing trace with hash -974935779, now seen corresponding path program 1 times [2021-11-23 14:17:29,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:17:29,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462467055] [2021-11-23 14:17:29,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:17:29,809 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:17:29,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:17:29,906 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 53 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 14:17:29,906 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:17:29,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462467055] [2021-11-23 14:17:29,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462467055] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 14:17:29,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246497562] [2021-11-23 14:17:29,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:17:29,907 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:17:29,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9098e8-6cea-42b6-894f-a594b6fe8909/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 14:17:29,909 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9098e8-6cea-42b6-894f-a594b6fe8909/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 14:17:29,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9098e8-6cea-42b6-894f-a594b6fe8909/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 14:17:30,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:17:30,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 488 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 14:17:30,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 14:17:30,610 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-23 14:17:30,610 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 14:17:30,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246497562] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:17:30,610 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 14:17:30,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-11-23 14:17:30,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476324046] [2021-11-23 14:17:30,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:17:30,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 14:17:30,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:17:30,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 14:17:30,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 14:17:30,613 INFO L87 Difference]: Start difference. First operand 6343 states and 7364 transitions. Second operand has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:17:31,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:17:31,421 INFO L93 Difference]: Finished difference Result 17988 states and 20975 transitions. [2021-11-23 14:17:31,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 14:17:31,421 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 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 241 [2021-11-23 14:17:31,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:17:31,479 INFO L225 Difference]: With dead ends: 17988 [2021-11-23 14:17:31,479 INFO L226 Difference]: Without dead ends: 12053 [2021-11-23 14:17:31,488 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 240 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 14:17:31,489 INFO L933 BasicCegarLoop]: 112 mSDtfsCounter, 59 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 588 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-23 14:17:31,489 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 129 Invalid, 624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 588 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-23 14:17:31,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12053 states. [2021-11-23 14:17:31,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12053 to 12049. [2021-11-23 14:17:31,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12049 states, 12048 states have (on average 1.1509794156706508) internal successors, (13867), 12048 states have internal predecessors, (13867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:17:31,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12049 states to 12049 states and 13867 transitions. [2021-11-23 14:17:31,818 INFO L78 Accepts]: Start accepts. Automaton has 12049 states and 13867 transitions. Word has length 241 [2021-11-23 14:17:31,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:17:31,819 INFO L470 AbstractCegarLoop]: Abstraction has 12049 states and 13867 transitions. [2021-11-23 14:17:31,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:17:31,820 INFO L276 IsEmpty]: Start isEmpty. Operand 12049 states and 13867 transitions. [2021-11-23 14:17:31,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2021-11-23 14:17:31,843 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:17:31,844 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:17:31,884 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9098e8-6cea-42b6-894f-a594b6fe8909/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 14:17:32,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9098e8-6cea-42b6-894f-a594b6fe8909/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:17:32,068 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:17:32,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:17:32,068 INFO L85 PathProgramCache]: Analyzing trace with hash -487881760, now seen corresponding path program 1 times [2021-11-23 14:17:32,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:17:32,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326708965] [2021-11-23 14:17:32,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:17:32,069 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:17:32,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:17:32,183 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 74 proven. 6 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-23 14:17:32,183 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:17:32,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326708965] [2021-11-23 14:17:32,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326708965] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 14:17:32,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142693447] [2021-11-23 14:17:32,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:17:32,184 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:17:32,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9098e8-6cea-42b6-894f-a594b6fe8909/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 14:17:32,188 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9098e8-6cea-42b6-894f-a594b6fe8909/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 14:17:32,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9098e8-6cea-42b6-894f-a594b6fe8909/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 14:17:32,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:17:32,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 14:17:32,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 14:17:32,868 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-23 14:17:32,869 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 14:17:32,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142693447] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:17:32,869 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 14:17:32,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-11-23 14:17:32,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991376696] [2021-11-23 14:17:32,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:17:32,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 14:17:32,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:17:32,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 14:17:32,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 14:17:32,872 INFO L87 Difference]: Start difference. First operand 12049 states and 13867 transitions. Second operand has 3 states, 3 states have (on average 76.66666666666667) internal successors, (230), 3 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:17:33,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:17:33,764 INFO L93 Difference]: Finished difference Result 34485 states and 39656 transitions. [2021-11-23 14:17:33,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 14:17:33,764 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 76.66666666666667) internal successors, (230), 3 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 265 [2021-11-23 14:17:33,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:17:33,809 INFO L225 Difference]: With dead ends: 34485 [2021-11-23 14:17:33,809 INFO L226 Difference]: Without dead ends: 22844 [2021-11-23 14:17:33,824 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 264 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 14:17:33,825 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 38 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-23 14:17:33,825 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 121 Invalid, 600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 556 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-23 14:17:33,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22844 states. [2021-11-23 14:17:34,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22844 to 21196. [2021-11-23 14:17:34,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21196 states, 21195 states have (on average 1.150129747581977) internal successors, (24377), 21195 states have internal predecessors, (24377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:17:34,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21196 states to 21196 states and 24377 transitions. [2021-11-23 14:17:34,442 INFO L78 Accepts]: Start accepts. Automaton has 21196 states and 24377 transitions. Word has length 265 [2021-11-23 14:17:34,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:17:34,443 INFO L470 AbstractCegarLoop]: Abstraction has 21196 states and 24377 transitions. [2021-11-23 14:17:34,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.66666666666667) internal successors, (230), 3 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:17:34,444 INFO L276 IsEmpty]: Start isEmpty. Operand 21196 states and 24377 transitions. [2021-11-23 14:17:34,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2021-11-23 14:17:34,478 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:17:34,478 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:17:34,517 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9098e8-6cea-42b6-894f-a594b6fe8909/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 14:17:34,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9098e8-6cea-42b6-894f-a594b6fe8909/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-23 14:17:34,692 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:17:34,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:17:34,692 INFO L85 PathProgramCache]: Analyzing trace with hash -250647890, now seen corresponding path program 2 times [2021-11-23 14:17:34,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:17:34,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061478634] [2021-11-23 14:17:34,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:17:34,693 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:17:34,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:17:34,789 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-23 14:17:34,789 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:17:34,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061478634] [2021-11-23 14:17:34,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061478634] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:17:34,790 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:17:34,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 14:17:34,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446435859] [2021-11-23 14:17:34,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:17:34,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 14:17:34,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:17:34,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 14:17:34,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 14:17:34,792 INFO L87 Difference]: Start difference. First operand 21196 states and 24377 transitions. Second operand has 4 states, 4 states have (on average 58.75) internal successors, (235), 3 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:17:36,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:17:36,019 INFO L93 Difference]: Finished difference Result 71656 states and 82379 transitions. [2021-11-23 14:17:36,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 14:17:36,019 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 58.75) internal successors, (235), 3 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 265 [2021-11-23 14:17:36,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:17:36,137 INFO L225 Difference]: With dead ends: 71656 [2021-11-23 14:17:36,137 INFO L226 Difference]: Without dead ends: 51274 [2021-11-23 14:17:36,165 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 14:17:36,166 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 492 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 677 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 492 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 777 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-23 14:17:36,166 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [492 Valid, 315 Invalid, 777 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 677 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-23 14:17:36,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51274 states. [2021-11-23 14:17:36,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51274 to 41092. [2021-11-23 14:17:37,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41092 states, 41091 states have (on average 1.1459200311503737) internal successors, (47087), 41091 states have internal predecessors, (47087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:17:37,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41092 states to 41092 states and 47087 transitions. [2021-11-23 14:17:37,080 INFO L78 Accepts]: Start accepts. Automaton has 41092 states and 47087 transitions. Word has length 265 [2021-11-23 14:17:37,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:17:37,081 INFO L470 AbstractCegarLoop]: Abstraction has 41092 states and 47087 transitions. [2021-11-23 14:17:37,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 58.75) internal successors, (235), 3 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:17:37,081 INFO L276 IsEmpty]: Start isEmpty. Operand 41092 states and 47087 transitions. [2021-11-23 14:17:37,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2021-11-23 14:17:37,160 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:17:37,160 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:17:37,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-23 14:17:37,161 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:17:37,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:17:37,162 INFO L85 PathProgramCache]: Analyzing trace with hash 755725242, now seen corresponding path program 1 times [2021-11-23 14:17:37,162 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:17:37,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310552611] [2021-11-23 14:17:37,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:17:37,162 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:17:37,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:17:37,524 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 108 proven. 6 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-23 14:17:37,524 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:17:37,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310552611] [2021-11-23 14:17:37,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310552611] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 14:17:37,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524215285] [2021-11-23 14:17:37,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:17:37,525 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:17:37,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9098e8-6cea-42b6-894f-a594b6fe8909/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 14:17:37,528 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9098e8-6cea-42b6-894f-a594b6fe8909/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 14:17:37,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9098e8-6cea-42b6-894f-a594b6fe8909/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 14:17:37,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:17:37,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 571 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 14:17:37,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 14:17:38,281 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 170 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-23 14:17:38,281 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 14:17:38,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524215285] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:17:38,281 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 14:17:38,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-11-23 14:17:38,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611207459] [2021-11-23 14:17:38,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:17:38,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 14:17:38,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:17:38,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 14:17:38,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 14:17:38,284 INFO L87 Difference]: Start difference. First operand 41092 states and 47087 transitions. Second operand has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:17:39,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:17:39,303 INFO L93 Difference]: Finished difference Result 102304 states and 117512 transitions. [2021-11-23 14:17:39,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 14:17:39,304 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 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 293 [2021-11-23 14:17:39,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:17:39,422 INFO L225 Difference]: With dead ends: 102304 [2021-11-23 14:17:39,423 INFO L226 Difference]: Without dead ends: 62026 [2021-11-23 14:17:39,454 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 292 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 14:17:39,455 INFO L933 BasicCegarLoop]: 281 mSDtfsCounter, 200 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-23 14:17:39,456 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 302 Invalid, 604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 533 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-23 14:17:39,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62026 states. [2021-11-23 14:17:40,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62026 to 61203. [2021-11-23 14:17:40,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61203 states, 61202 states have (on average 1.1341949609489885) internal successors, (69415), 61202 states have internal predecessors, (69415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:17:40,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61203 states to 61203 states and 69415 transitions. [2021-11-23 14:17:40,744 INFO L78 Accepts]: Start accepts. Automaton has 61203 states and 69415 transitions. Word has length 293 [2021-11-23 14:17:40,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:17:40,744 INFO L470 AbstractCegarLoop]: Abstraction has 61203 states and 69415 transitions. [2021-11-23 14:17:40,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:17:40,745 INFO L276 IsEmpty]: Start isEmpty. Operand 61203 states and 69415 transitions. [2021-11-23 14:17:41,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2021-11-23 14:17:41,006 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:17:41,006 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:17:41,041 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9098e8-6cea-42b6-894f-a594b6fe8909/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-11-23 14:17:41,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9098e8-6cea-42b6-894f-a594b6fe8909/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:17:41,220 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:17:41,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:17:41,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1453183147, now seen corresponding path program 1 times [2021-11-23 14:17:41,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:17:41,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302341855] [2021-11-23 14:17:41,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:17:41,221 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:17:41,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:17:41,350 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 74 proven. 6 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-11-23 14:17:41,350 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:17:41,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302341855] [2021-11-23 14:17:41,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302341855] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 14:17:41,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405403288] [2021-11-23 14:17:41,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:17:41,351 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:17:41,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9098e8-6cea-42b6-894f-a594b6fe8909/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 14:17:41,356 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9098e8-6cea-42b6-894f-a594b6fe8909/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 14:17:41,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9098e8-6cea-42b6-894f-a594b6fe8909/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 14:17:41,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:17:41,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 14:17:41,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 14:17:41,985 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 108 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-23 14:17:41,985 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 14:17:41,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405403288] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:17:41,986 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 14:17:41,986 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-11-23 14:17:41,986 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144809129] [2021-11-23 14:17:41,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:17:41,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 14:17:41,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:17:41,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 14:17:41,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 14:17:41,989 INFO L87 Difference]: Start difference. First operand 61203 states and 69415 transitions. Second operand has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 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) [2021-11-23 14:17:43,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:17:43,014 INFO L93 Difference]: Finished difference Result 121395 states and 137769 transitions. [2021-11-23 14:17:43,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 14:17:43,015 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 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) Word has length 304 [2021-11-23 14:17:43,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:17:43,090 INFO L225 Difference]: With dead ends: 121395 [2021-11-23 14:17:43,091 INFO L226 Difference]: Without dead ends: 61006 [2021-11-23 14:17:43,114 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 303 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 14:17:43,114 INFO L933 BasicCegarLoop]: 268 mSDtfsCounter, 70 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-23 14:17:43,115 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 277 Invalid, 566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 548 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-23 14:17:43,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61006 states. [2021-11-23 14:17:44,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61006 to 61000. [2021-11-23 14:17:44,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61000 states, 60999 states have (on average 1.1283955474679912) internal successors, (68831), 60999 states have internal predecessors, (68831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:17:44,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61000 states to 61000 states and 68831 transitions. [2021-11-23 14:17:44,228 INFO L78 Accepts]: Start accepts. Automaton has 61000 states and 68831 transitions. Word has length 304 [2021-11-23 14:17:44,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:17:44,229 INFO L470 AbstractCegarLoop]: Abstraction has 61000 states and 68831 transitions. [2021-11-23 14:17:44,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 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) [2021-11-23 14:17:44,229 INFO L276 IsEmpty]: Start isEmpty. Operand 61000 states and 68831 transitions. [2021-11-23 14:17:44,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2021-11-23 14:17:44,277 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:17:44,278 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:17:44,302 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9098e8-6cea-42b6-894f-a594b6fe8909/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-23 14:17:44,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9098e8-6cea-42b6-894f-a594b6fe8909/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-23 14:17:44,484 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:17:44,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:17:44,484 INFO L85 PathProgramCache]: Analyzing trace with hash 2079191557, now seen corresponding path program 1 times [2021-11-23 14:17:44,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:17:44,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431765205] [2021-11-23 14:17:44,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:17:44,485 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:17:44,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:17:44,597 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 108 proven. 6 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2021-11-23 14:17:44,597 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:17:44,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431765205] [2021-11-23 14:17:44,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431765205] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 14:17:44,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278540298] [2021-11-23 14:17:44,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:17:44,598 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:17:44,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9098e8-6cea-42b6-894f-a594b6fe8909/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 14:17:44,610 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9098e8-6cea-42b6-894f-a594b6fe8909/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 14:17:44,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9098e8-6cea-42b6-894f-a594b6fe8909/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-23 14:17:45,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:17:45,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 623 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 14:17:45,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 14:17:45,454 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 207 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-23 14:17:45,454 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 14:17:45,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278540298] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:17:45,454 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 14:17:45,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-11-23 14:17:45,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364576844] [2021-11-23 14:17:45,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:17:45,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 14:17:45,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:17:45,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 14:17:45,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 14:17:45,456 INFO L87 Difference]: Start difference. First operand 61000 states and 68831 transitions. Second operand has 3 states, 3 states have (on average 100.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:17:46,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:17:46,583 INFO L93 Difference]: Finished difference Result 115289 states and 130059 transitions. [2021-11-23 14:17:46,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 14:17:46,583 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 100.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 332 [2021-11-23 14:17:46,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:17:46,636 INFO L225 Difference]: With dead ends: 115289 [2021-11-23 14:17:46,636 INFO L226 Difference]: Without dead ends: 55103 [2021-11-23 14:17:46,652 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 331 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 14:17:46,653 INFO L933 BasicCegarLoop]: 289 mSDtfsCounter, 171 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 498 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-23 14:17:46,653 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 304 Invalid, 588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 498 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-23 14:17:46,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55103 states. [2021-11-23 14:17:47,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55103 to 55101. [2021-11-23 14:17:47,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55101 states, 55100 states have (on average 1.1064609800362977) internal successors, (60966), 55100 states have internal predecessors, (60966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:17:47,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55101 states to 55101 states and 60966 transitions. [2021-11-23 14:17:47,580 INFO L78 Accepts]: Start accepts. Automaton has 55101 states and 60966 transitions. Word has length 332 [2021-11-23 14:17:47,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:17:47,580 INFO L470 AbstractCegarLoop]: Abstraction has 55101 states and 60966 transitions. [2021-11-23 14:17:47,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 100.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:17:47,581 INFO L276 IsEmpty]: Start isEmpty. Operand 55101 states and 60966 transitions. [2021-11-23 14:17:47,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2021-11-23 14:17:47,636 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:17:47,636 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:17:47,657 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9098e8-6cea-42b6-894f-a594b6fe8909/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-11-23 14:17:47,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9098e8-6cea-42b6-894f-a594b6fe8909/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-23 14:17:47,840 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:17:47,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:17:47,840 INFO L85 PathProgramCache]: Analyzing trace with hash -868985159, now seen corresponding path program 1 times [2021-11-23 14:17:47,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:17:47,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737527270] [2021-11-23 14:17:47,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:17:47,841 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:17:47,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:17:48,051 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 138 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:17:48,051 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:17:48,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737527270] [2021-11-23 14:17:48,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737527270] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:17:48,052 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:17:48,052 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 14:17:48,052 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426924679] [2021-11-23 14:17:48,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:17:48,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 14:17:48,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:17:48,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 14:17:48,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 14:17:48,054 INFO L87 Difference]: Start difference. First operand 55101 states and 60966 transitions. Second operand has 3 states, 3 states have (on average 110.66666666666667) internal successors, (332), 2 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:17:49,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:17:49,207 INFO L93 Difference]: Finished difference Result 116728 states and 129412 transitions. [2021-11-23 14:17:49,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 14:17:49,207 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 110.66666666666667) internal successors, (332), 2 states have internal predecessors, (332), 0 states have call successors, (0), 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 332 [2021-11-23 14:17:49,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:17:49,294 INFO L225 Difference]: With dead ends: 116728 [2021-11-23 14:17:49,294 INFO L226 Difference]: Without dead ends: 63050 [2021-11-23 14:17:49,324 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 14:17:49,325 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 92 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 580 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-23 14:17:49,325 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 136 Invalid, 608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 580 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-23 14:17:49,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63050 states. [2021-11-23 14:17:50,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63050 to 62640. [2021-11-23 14:17:50,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62640 states, 62639 states have (on average 1.1035616788262903) internal successors, (69126), 62639 states have internal predecessors, (69126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:17:50,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62640 states to 62640 states and 69126 transitions. [2021-11-23 14:17:50,648 INFO L78 Accepts]: Start accepts. Automaton has 62640 states and 69126 transitions. Word has length 332 [2021-11-23 14:17:50,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:17:50,649 INFO L470 AbstractCegarLoop]: Abstraction has 62640 states and 69126 transitions. [2021-11-23 14:17:50,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 110.66666666666667) internal successors, (332), 2 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:17:50,650 INFO L276 IsEmpty]: Start isEmpty. Operand 62640 states and 69126 transitions. [2021-11-23 14:17:50,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2021-11-23 14:17:50,701 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:17:50,701 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:17:50,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-23 14:17:50,702 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:17:50,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:17:50,702 INFO L85 PathProgramCache]: Analyzing trace with hash -2073626625, now seen corresponding path program 1 times [2021-11-23 14:17:50,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:17:50,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403107299] [2021-11-23 14:17:50,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:17:50,702 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:17:50,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:17:50,828 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 151 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-11-23 14:17:50,828 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:17:50,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403107299] [2021-11-23 14:17:50,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403107299] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:17:50,829 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:17:50,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 14:17:50,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933263258] [2021-11-23 14:17:50,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:17:50,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 14:17:50,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:17:50,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 14:17:50,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 14:17:50,831 INFO L87 Difference]: Start difference. First operand 62640 states and 69126 transitions. Second operand has 4 states, 4 states have (on average 74.25) internal successors, (297), 3 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:17:52,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:17:52,070 INFO L93 Difference]: Finished difference Result 123054 states and 135961 transitions. [2021-11-23 14:17:52,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 14:17:52,071 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 74.25) internal successors, (297), 3 states have internal predecessors, (297), 0 states have call successors, (0), 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 338 [2021-11-23 14:17:52,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:17:52,137 INFO L225 Difference]: With dead ends: 123054 [2021-11-23 14:17:52,137 INFO L226 Difference]: Without dead ends: 67951 [2021-11-23 14:17:52,161 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 14:17:52,162 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 355 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1017 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 1142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 1017 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-23 14:17:52,162 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [355 Valid, 102 Invalid, 1142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 1017 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-23 14:17:52,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67951 states. [2021-11-23 14:17:53,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67951 to 67928. [2021-11-23 14:17:53,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67928 states, 67927 states have (on average 1.0994891574778807) internal successors, (74685), 67927 states have internal predecessors, (74685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:17:53,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67928 states to 67928 states and 74685 transitions. [2021-11-23 14:17:53,555 INFO L78 Accepts]: Start accepts. Automaton has 67928 states and 74685 transitions. Word has length 338 [2021-11-23 14:17:53,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:17:53,556 INFO L470 AbstractCegarLoop]: Abstraction has 67928 states and 74685 transitions. [2021-11-23 14:17:53,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 74.25) internal successors, (297), 3 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:17:53,556 INFO L276 IsEmpty]: Start isEmpty. Operand 67928 states and 74685 transitions. [2021-11-23 14:17:53,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2021-11-23 14:17:53,591 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:17:53,591 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:17:53,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-23 14:17:53,592 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:17:53,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:17:53,592 INFO L85 PathProgramCache]: Analyzing trace with hash -131180096, now seen corresponding path program 1 times [2021-11-23 14:17:53,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:17:53,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044091517] [2021-11-23 14:17:53,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:17:53,593 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:17:53,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:17:53,705 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 74 proven. 6 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2021-11-23 14:17:53,705 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:17:53,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044091517] [2021-11-23 14:17:53,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044091517] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 14:17:53,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217049278] [2021-11-23 14:17:53,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:17:53,706 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:17:53,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9098e8-6cea-42b6-894f-a594b6fe8909/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 14:17:53,712 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9098e8-6cea-42b6-894f-a594b6fe8909/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 14:17:53,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9098e8-6cea-42b6-894f-a594b6fe8909/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-23 14:17:53,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:17:53,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 589 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 14:17:53,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 14:17:54,521 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 145 proven. 37 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 14:17:54,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 14:17:55,172 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 145 proven. 37 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 14:17:55,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217049278] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 14:17:55,173 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 14:17:55,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2021-11-23 14:17:55,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560767695] [2021-11-23 14:17:55,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 14:17:55,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 14:17:55,176 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:17:55,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 14:17:55,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-23 14:17:55,177 INFO L87 Difference]: Start difference. First operand 67928 states and 74685 transitions. Second operand has 6 states, 6 states have (on average 62.333333333333336) internal successors, (374), 5 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:17:57,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:17:57,767 INFO L93 Difference]: Finished difference Result 193427 states and 213456 transitions. [2021-11-23 14:17:57,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 14:17:57,768 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 62.333333333333336) internal successors, (374), 5 states have internal predecessors, (374), 0 states have call successors, (0), 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 339 [2021-11-23 14:17:57,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:17:57,914 INFO L225 Difference]: With dead ends: 193427 [2021-11-23 14:17:57,915 INFO L226 Difference]: Without dead ends: 133442 [2021-11-23 14:17:57,949 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 682 GetRequests, 675 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-23 14:17:57,950 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 2327 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 1974 mSolverCounterSat, 628 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2327 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 2602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 628 IncrementalHoareTripleChecker+Valid, 1974 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-23 14:17:57,950 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2327 Valid, 154 Invalid, 2602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [628 Valid, 1974 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-11-23 14:17:58,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133442 states. [2021-11-23 14:17:59,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133442 to 133385. [2021-11-23 14:18:00,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133385 states, 133384 states have (on average 1.0976353985485516) internal successors, (146407), 133384 states have internal predecessors, (146407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:18:00,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133385 states to 133385 states and 146407 transitions. [2021-11-23 14:18:00,292 INFO L78 Accepts]: Start accepts. Automaton has 133385 states and 146407 transitions. Word has length 339 [2021-11-23 14:18:00,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:18:00,292 INFO L470 AbstractCegarLoop]: Abstraction has 133385 states and 146407 transitions. [2021-11-23 14:18:00,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 62.333333333333336) internal successors, (374), 5 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:18:00,292 INFO L276 IsEmpty]: Start isEmpty. Operand 133385 states and 146407 transitions. [2021-11-23 14:18:00,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 367 [2021-11-23 14:18:00,362 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:18:00,362 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:18:00,384 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9098e8-6cea-42b6-894f-a594b6fe8909/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-23 14:18:00,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9098e8-6cea-42b6-894f-a594b6fe8909/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-23 14:18:00,565 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:18:00,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:18:00,565 INFO L85 PathProgramCache]: Analyzing trace with hash -386022516, now seen corresponding path program 1 times [2021-11-23 14:18:00,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:18:00,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350076368] [2021-11-23 14:18:00,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:18:00,566 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:18:00,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:18:00,761 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 182 proven. 6 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-11-23 14:18:00,762 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:18:00,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350076368] [2021-11-23 14:18:00,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350076368] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 14:18:00,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259243904] [2021-11-23 14:18:00,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:18:00,763 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:18:00,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9098e8-6cea-42b6-894f-a594b6fe8909/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 14:18:00,764 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9098e8-6cea-42b6-894f-a594b6fe8909/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 14:18:01,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9098e8-6cea-42b6-894f-a594b6fe8909/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-23 14:18:01,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:18:01,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 648 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 14:18:01,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 14:18:02,130 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 182 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-23 14:18:02,130 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 14:18:02,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259243904] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:18:02,131 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 14:18:02,131 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2021-11-23 14:18:02,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094178388] [2021-11-23 14:18:02,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:18:02,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 14:18:02,132 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:18:02,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 14:18:02,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 14:18:02,133 INFO L87 Difference]: Start difference. First operand 133385 states and 146407 transitions. Second operand has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 2 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:18:03,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:18:03,828 INFO L93 Difference]: Finished difference Result 373693 states and 410617 transitions. [2021-11-23 14:18:03,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 14:18:03,829 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 2 states have internal predecessors, (320), 0 states have call successors, (0), 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 366 [2021-11-23 14:18:03,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:18:04,187 INFO L225 Difference]: With dead ends: 373693 [2021-11-23 14:18:04,187 INFO L226 Difference]: Without dead ends: 241731 [2021-11-23 14:18:04,261 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 365 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 14:18:04,262 INFO L933 BasicCegarLoop]: 249 mSDtfsCounter, 185 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 485 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 14:18:04,275 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 485 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 14:18:04,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241731 states. [2021-11-23 14:18:07,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241731 to 209416. [2021-11-23 14:18:07,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209416 states, 209415 states have (on average 1.0990855478356374) internal successors, (230165), 209415 states have internal predecessors, (230165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:18:08,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209416 states to 209416 states and 230165 transitions. [2021-11-23 14:18:08,244 INFO L78 Accepts]: Start accepts. Automaton has 209416 states and 230165 transitions. Word has length 366 [2021-11-23 14:18:08,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:18:08,245 INFO L470 AbstractCegarLoop]: Abstraction has 209416 states and 230165 transitions. [2021-11-23 14:18:08,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 2 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:18:08,245 INFO L276 IsEmpty]: Start isEmpty. Operand 209416 states and 230165 transitions. [2021-11-23 14:18:08,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 369 [2021-11-23 14:18:08,280 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:18:08,280 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:18:08,305 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9098e8-6cea-42b6-894f-a594b6fe8909/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-23 14:18:08,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9098e8-6cea-42b6-894f-a594b6fe8909/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-23 14:18:08,482 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:18:08,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:18:08,482 INFO L85 PathProgramCache]: Analyzing trace with hash -740097569, now seen corresponding path program 1 times [2021-11-23 14:18:08,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:18:08,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869926405] [2021-11-23 14:18:08,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:18:08,483 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:18:08,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:18:08,641 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 208 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 14:18:08,641 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:18:08,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869926405] [2021-11-23 14:18:08,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869926405] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:18:08,642 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:18:08,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 14:18:08,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696504993] [2021-11-23 14:18:08,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:18:08,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 14:18:08,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:18:08,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 14:18:08,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 14:18:08,644 INFO L87 Difference]: Start difference. First operand 209416 states and 230165 transitions. Second operand has 3 states, 3 states have (on average 121.0) internal successors, (363), 3 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:18:11,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:18:11,015 INFO L93 Difference]: Finished difference Result 445833 states and 489116 transitions. [2021-11-23 14:18:11,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 14:18:11,016 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 121.0) internal successors, (363), 3 states have internal predecessors, (363), 0 states have call successors, (0), 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 368 [2021-11-23 14:18:11,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:18:11,297 INFO L225 Difference]: With dead ends: 445833 [2021-11-23 14:18:11,297 INFO L226 Difference]: Without dead ends: 237434 [2021-11-23 14:18:11,389 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 [2021-11-23 14:18:11,391 INFO L933 BasicCegarLoop]: 290 mSDtfsCounter, 211 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 519 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-23 14:18:11,393 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 305 Invalid, 602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 519 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-23 14:18:12,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237434 states. [2021-11-23 14:18:14,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237434 to 190523. [2021-11-23 14:18:15,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190523 states, 190522 states have (on average 1.083339456860625) internal successors, (206400), 190522 states have internal predecessors, (206400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:18:15,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190523 states to 190523 states and 206400 transitions. [2021-11-23 14:18:15,292 INFO L78 Accepts]: Start accepts. Automaton has 190523 states and 206400 transitions. Word has length 368 [2021-11-23 14:18:15,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:18:15,293 INFO L470 AbstractCegarLoop]: Abstraction has 190523 states and 206400 transitions. [2021-11-23 14:18:15,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 121.0) internal successors, (363), 3 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:18:15,293 INFO L276 IsEmpty]: Start isEmpty. Operand 190523 states and 206400 transitions. [2021-11-23 14:18:15,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 430 [2021-11-23 14:18:15,342 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:18:15,342 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:18:15,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-23 14:18:15,343 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:18:15,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:18:15,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1930289690, now seen corresponding path program 1 times [2021-11-23 14:18:15,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:18:15,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132850073] [2021-11-23 14:18:15,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:18:15,345 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:18:15,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:18:15,464 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 159 proven. 0 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2021-11-23 14:18:15,464 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:18:15,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132850073] [2021-11-23 14:18:15,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132850073] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:18:15,465 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:18:15,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 14:18:15,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459511213] [2021-11-23 14:18:15,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:18:15,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 14:18:15,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:18:15,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 14:18:15,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 14:18:15,467 INFO L87 Difference]: Start difference. First operand 190523 states and 206400 transitions. Second operand has 3 states, 3 states have (on average 83.0) internal successors, (249), 2 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:18:17,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:18:17,869 INFO L93 Difference]: Finished difference Result 428011 states and 462972 transitions. [2021-11-23 14:18:17,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 14:18:17,869 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 83.0) internal successors, (249), 2 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 429 [2021-11-23 14:18:17,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:18:18,163 INFO L225 Difference]: With dead ends: 428011 [2021-11-23 14:18:18,163 INFO L226 Difference]: Without dead ends: 238302 [2021-11-23 14:18:18,250 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 14:18:18,250 INFO L933 BasicCegarLoop]: 117 mSDtfsCounter, 205 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 599 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-23 14:18:18,251 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 138 Invalid, 613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 599 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-23 14:18:19,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238302 states.