./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pals_lcr.6.ufo.UNBOUNDED.pals+Problem12_label03.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20ef957-d96d-4d1a-8e71-49bb82a1fba2/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20ef957-d96d-4d1a-8e71-49bb82a1fba2/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20ef957-d96d-4d1a-8e71-49bb82a1fba2/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20ef957-d96d-4d1a-8e71-49bb82a1fba2/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/pals_lcr.6.ufo.UNBOUNDED.pals+Problem12_label03.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20ef957-d96d-4d1a-8e71-49bb82a1fba2/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20ef957-d96d-4d1a-8e71-49bb82a1fba2/bin/uautomizer-DrprNOufMa --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 e1d9709d5a0621fd4bc0599bfe40ccbc8c215c029862756c658cfcd57bd9db9f --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-07 00:55:31,486 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-07 00:55:31,488 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-07 00:55:31,519 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-07 00:55:31,519 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-07 00:55:31,521 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-07 00:55:31,522 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-07 00:55:31,525 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-07 00:55:31,527 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-07 00:55:31,528 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-07 00:55:31,529 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-07 00:55:31,530 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-07 00:55:31,531 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-07 00:55:31,532 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-07 00:55:31,533 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-07 00:55:31,535 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-07 00:55:31,536 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-07 00:55:31,537 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-07 00:55:31,539 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-07 00:55:31,541 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-07 00:55:31,543 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-07 00:55:31,544 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-07 00:55:31,546 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-07 00:55:31,547 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-07 00:55:31,550 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-07 00:55:31,551 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-07 00:55:31,551 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-07 00:55:31,552 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-07 00:55:31,553 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-07 00:55:31,554 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-07 00:55:31,554 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-07 00:55:31,555 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-07 00:55:31,556 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-07 00:55:31,556 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-07 00:55:31,557 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-07 00:55:31,558 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-07 00:55:31,558 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-07 00:55:31,559 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-07 00:55:31,559 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-07 00:55:31,560 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-07 00:55:31,560 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-07 00:55:31,561 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20ef957-d96d-4d1a-8e71-49bb82a1fba2/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-07 00:55:31,585 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-07 00:55:31,585 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-07 00:55:31,585 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-07 00:55:31,586 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-07 00:55:31,586 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-07 00:55:31,587 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-07 00:55:31,587 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-07 00:55:31,587 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-07 00:55:31,588 INFO L138 SettingsManager]: * Use SBE=true [2021-12-07 00:55:31,588 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-07 00:55:31,588 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-07 00:55:31,588 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-07 00:55:31,588 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-07 00:55:31,589 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-07 00:55:31,589 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-07 00:55:31,589 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-07 00:55:31,589 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-07 00:55:31,589 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-07 00:55:31,590 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-07 00:55:31,590 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-07 00:55:31,590 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-07 00:55:31,590 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-07 00:55:31,590 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-07 00:55:31,590 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-07 00:55:31,591 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-07 00:55:31,591 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-07 00:55:31,591 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-07 00:55:31,591 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-07 00:55:31,592 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-07 00:55:31,592 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-07 00:55:31,592 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-07 00:55:31,592 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-07 00:55:31,592 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-07 00:55:31,592 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-07 00:55:31,593 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_a20ef957-d96d-4d1a-8e71-49bb82a1fba2/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20ef957-d96d-4d1a-8e71-49bb82a1fba2/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e1d9709d5a0621fd4bc0599bfe40ccbc8c215c029862756c658cfcd57bd9db9f [2021-12-07 00:55:31,796 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-07 00:55:31,812 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-07 00:55:31,814 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-07 00:55:31,815 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-07 00:55:31,815 INFO L275 PluginConnector]: CDTParser initialized [2021-12-07 00:55:31,816 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20ef957-d96d-4d1a-8e71-49bb82a1fba2/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/combinations/pals_lcr.6.ufo.UNBOUNDED.pals+Problem12_label03.c [2021-12-07 00:55:31,860 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20ef957-d96d-4d1a-8e71-49bb82a1fba2/bin/uautomizer-DrprNOufMa/data/263dd1285/206815acf9964202bf9691ae68cd43f9/FLAG44431bf31 [2021-12-07 00:55:32,444 INFO L306 CDTParser]: Found 1 translation units. [2021-12-07 00:55:32,444 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20ef957-d96d-4d1a-8e71-49bb82a1fba2/sv-benchmarks/c/combinations/pals_lcr.6.ufo.UNBOUNDED.pals+Problem12_label03.c [2021-12-07 00:55:32,471 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20ef957-d96d-4d1a-8e71-49bb82a1fba2/bin/uautomizer-DrprNOufMa/data/263dd1285/206815acf9964202bf9691ae68cd43f9/FLAG44431bf31 [2021-12-07 00:55:32,637 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20ef957-d96d-4d1a-8e71-49bb82a1fba2/bin/uautomizer-DrprNOufMa/data/263dd1285/206815acf9964202bf9691ae68cd43f9 [2021-12-07 00:55:32,639 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-07 00:55:32,640 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-07 00:55:32,641 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-07 00:55:32,641 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-07 00:55:32,644 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-07 00:55:32,645 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 12:55:32" (1/1) ... [2021-12-07 00:55:32,646 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17a11a93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:55:32, skipping insertion in model container [2021-12-07 00:55:32,646 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 12:55:32" (1/1) ... [2021-12-07 00:55:32,653 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-07 00:55:32,761 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-07 00:55:33,019 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_a20ef957-d96d-4d1a-8e71-49bb82a1fba2/sv-benchmarks/c/combinations/pals_lcr.6.ufo.UNBOUNDED.pals+Problem12_label03.c[15510,15523] [2021-12-07 00:55:33,043 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_a20ef957-d96d-4d1a-8e71-49bb82a1fba2/sv-benchmarks/c/combinations/pals_lcr.6.ufo.UNBOUNDED.pals+Problem12_label03.c[17847,17860] [2021-12-07 00:55:33,587 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-07 00:55:33,594 INFO L203 MainTranslator]: Completed pre-run [2021-12-07 00:55:33,618 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_a20ef957-d96d-4d1a-8e71-49bb82a1fba2/sv-benchmarks/c/combinations/pals_lcr.6.ufo.UNBOUNDED.pals+Problem12_label03.c[15510,15523] [2021-12-07 00:55:33,623 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_a20ef957-d96d-4d1a-8e71-49bb82a1fba2/sv-benchmarks/c/combinations/pals_lcr.6.ufo.UNBOUNDED.pals+Problem12_label03.c[17847,17860] [2021-12-07 00:55:33,989 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-07 00:55:34,010 INFO L208 MainTranslator]: Completed translation [2021-12-07 00:55:34,010 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:55:34 WrapperNode [2021-12-07 00:55:34,010 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-07 00:55:34,011 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-07 00:55:34,011 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-07 00:55:34,011 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-07 00:55:34,016 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:55:34" (1/1) ... [2021-12-07 00:55:34,056 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:55:34" (1/1) ... [2021-12-07 00:55:34,289 INFO L137 Inliner]: procedures = 38, calls = 23, calls flagged for inlining = 18, calls inlined = 18, statements flattened = 5147 [2021-12-07 00:55:34,290 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-07 00:55:34,290 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-07 00:55:34,290 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-07 00:55:34,290 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-07 00:55:34,297 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:55:34" (1/1) ... [2021-12-07 00:55:34,297 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:55:34" (1/1) ... [2021-12-07 00:55:34,336 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:55:34" (1/1) ... [2021-12-07 00:55:34,336 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:55:34" (1/1) ... [2021-12-07 00:55:34,475 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:55:34" (1/1) ... [2021-12-07 00:55:34,496 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:55:34" (1/1) ... [2021-12-07 00:55:34,527 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:55:34" (1/1) ... [2021-12-07 00:55:34,601 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-07 00:55:34,602 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-07 00:55:34,603 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-07 00:55:34,603 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-07 00:55:34,604 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:55:34" (1/1) ... [2021-12-07 00:55:34,614 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-07 00:55:34,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20ef957-d96d-4d1a-8e71-49bb82a1fba2/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:55:34,636 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20ef957-d96d-4d1a-8e71-49bb82a1fba2/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-07 00:55:34,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20ef957-d96d-4d1a-8e71-49bb82a1fba2/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-07 00:55:34,667 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-07 00:55:34,667 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-07 00:55:34,667 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-07 00:55:34,668 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-07 00:55:34,748 INFO L236 CfgBuilder]: Building ICFG [2021-12-07 00:55:34,749 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-07 00:55:37,518 INFO L277 CfgBuilder]: Performing block encoding [2021-12-07 00:55:37,531 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-07 00:55:37,532 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-07 00:55:37,534 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 12:55:37 BoogieIcfgContainer [2021-12-07 00:55:37,534 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-07 00:55:37,536 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-07 00:55:37,536 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-07 00:55:37,538 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-07 00:55:37,539 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 12:55:32" (1/3) ... [2021-12-07 00:55:37,539 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@353a8d0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 12:55:37, skipping insertion in model container [2021-12-07 00:55:37,539 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:55:34" (2/3) ... [2021-12-07 00:55:37,540 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@353a8d0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 12:55:37, skipping insertion in model container [2021-12-07 00:55:37,540 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 12:55:37" (3/3) ... [2021-12-07 00:55:37,541 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.6.ufo.UNBOUNDED.pals+Problem12_label03.c [2021-12-07 00:55:37,546 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-07 00:55:37,546 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-07 00:55:37,591 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-07 00:55:37,597 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-07 00:55:37,597 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-07 00:55:37,630 INFO L276 IsEmpty]: Start isEmpty. Operand has 928 states, 925 states have (on average 1.8983783783783783) internal successors, (1756), 927 states have internal predecessors, (1756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:55:37,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-07 00:55:37,637 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:55:37,638 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] [2021-12-07 00:55:37,638 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:55:37,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:55:37,643 INFO L85 PathProgramCache]: Analyzing trace with hash -1041827451, now seen corresponding path program 1 times [2021-12-07 00:55:37,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:55:37,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936712468] [2021-12-07 00:55:37,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:55:37,650 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:55:37,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:55:37,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:55:37,827 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:55:37,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936712468] [2021-12-07 00:55:37,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936712468] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:55:37,828 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:55:37,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-07 00:55:37,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110361712] [2021-12-07 00:55:37,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:55:37,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 00:55:37,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:55:37,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 00:55:37,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:55:37,866 INFO L87 Difference]: Start difference. First operand has 928 states, 925 states have (on average 1.8983783783783783) internal successors, (1756), 927 states have internal predecessors, (1756), 0 states have call successors, (0), 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 6.666666666666667) internal successors, (20), 2 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:55:40,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:55:40,465 INFO L93 Difference]: Finished difference Result 2563 states and 4924 transitions. [2021-12-07 00:55:40,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 00:55:40,467 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 2 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-12-07 00:55:40,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:55:40,485 INFO L225 Difference]: With dead ends: 2563 [2021-12-07 00:55:40,485 INFO L226 Difference]: Without dead ends: 1613 [2021-12-07 00:55:40,490 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:55:40,493 INFO L933 BasicCegarLoop]: 656 mSDtfsCounter, 999 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 2334 mSolverCounterSat, 651 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 999 SdHoareTripleChecker+Valid, 667 SdHoareTripleChecker+Invalid, 2985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 651 IncrementalHoareTripleChecker+Valid, 2334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-07 00:55:40,494 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [999 Valid, 667 Invalid, 2985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [651 Valid, 2334 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-07 00:55:40,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1613 states. [2021-12-07 00:55:40,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1613 to 1613. [2021-12-07 00:55:40,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1613 states, 1611 states have (on average 1.6449410304158907) internal successors, (2650), 1612 states have internal predecessors, (2650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:55:40,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1613 states to 1613 states and 2650 transitions. [2021-12-07 00:55:40,573 INFO L78 Accepts]: Start accepts. Automaton has 1613 states and 2650 transitions. Word has length 20 [2021-12-07 00:55:40,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:55:40,574 INFO L470 AbstractCegarLoop]: Abstraction has 1613 states and 2650 transitions. [2021-12-07 00:55:40,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 2 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:55:40,574 INFO L276 IsEmpty]: Start isEmpty. Operand 1613 states and 2650 transitions. [2021-12-07 00:55:40,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-07 00:55:40,576 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:55:40,576 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:55:40,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-07 00:55:40,576 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:55:40,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:55:40,577 INFO L85 PathProgramCache]: Analyzing trace with hash -46774319, now seen corresponding path program 1 times [2021-12-07 00:55:40,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:55:40,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089057807] [2021-12-07 00:55:40,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:55:40,578 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:55:40,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:55:40,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:55:40,690 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:55:40,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089057807] [2021-12-07 00:55:40,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089057807] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:55:40,691 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:55:40,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-07 00:55:40,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535218374] [2021-12-07 00:55:40,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:55:40,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-07 00:55:40,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:55:40,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-07 00:55:40,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-07 00:55:40,693 INFO L87 Difference]: Start difference. First operand 1613 states and 2650 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:55:40,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:55:40,764 INFO L93 Difference]: Finished difference Result 1679 states and 2752 transitions. [2021-12-07 00:55:40,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-07 00:55:40,765 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-12-07 00:55:40,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:55:40,773 INFO L225 Difference]: With dead ends: 1679 [2021-12-07 00:55:40,773 INFO L226 Difference]: Without dead ends: 1613 [2021-12-07 00:55:40,774 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-07 00:55:40,775 INFO L933 BasicCegarLoop]: 1621 mSDtfsCounter, 3 mSDsluCounter, 4820 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 6441 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:55:40,775 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 6441 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:55:40,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1613 states. [2021-12-07 00:55:40,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1613 to 1613. [2021-12-07 00:55:40,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1613 states, 1611 states have (on average 1.6201117318435754) internal successors, (2610), 1612 states have internal predecessors, (2610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:55:40,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1613 states to 1613 states and 2610 transitions. [2021-12-07 00:55:40,805 INFO L78 Accepts]: Start accepts. Automaton has 1613 states and 2610 transitions. Word has length 38 [2021-12-07 00:55:40,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:55:40,805 INFO L470 AbstractCegarLoop]: Abstraction has 1613 states and 2610 transitions. [2021-12-07 00:55:40,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:55:40,805 INFO L276 IsEmpty]: Start isEmpty. Operand 1613 states and 2610 transitions. [2021-12-07 00:55:40,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-07 00:55:40,808 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:55:40,808 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] [2021-12-07 00:55:40,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-07 00:55:40,808 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:55:40,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:55:40,809 INFO L85 PathProgramCache]: Analyzing trace with hash 1531755293, now seen corresponding path program 1 times [2021-12-07 00:55:40,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:55:40,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267269200] [2021-12-07 00:55:40,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:55:40,809 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:55:40,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:55:40,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:55:40,880 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:55:40,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267269200] [2021-12-07 00:55:40,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267269200] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:55:40,880 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:55:40,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 00:55:40,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53696404] [2021-12-07 00:55:40,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:55:40,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 00:55:40,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:55:40,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 00:55:40,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:55:40,882 INFO L87 Difference]: Start difference. First operand 1613 states and 2610 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:55:40,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:55:40,910 INFO L93 Difference]: Finished difference Result 1731 states and 2796 transitions. [2021-12-07 00:55:40,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 00:55:40,911 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 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 77 [2021-12-07 00:55:40,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:55:40,918 INFO L225 Difference]: With dead ends: 1731 [2021-12-07 00:55:40,919 INFO L226 Difference]: Without dead ends: 1669 [2021-12-07 00:55:40,919 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:55:40,920 INFO L933 BasicCegarLoop]: 1651 mSDtfsCounter, 1523 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1523 SdHoareTripleChecker+Valid, 1751 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:55:40,921 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1523 Valid, 1751 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:55:40,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1669 states. [2021-12-07 00:55:40,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1669 to 1667. [2021-12-07 00:55:40,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1667 states, 1665 states have (on average 1.6192192192192192) internal successors, (2696), 1666 states have internal predecessors, (2696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:55:40,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1667 states to 1667 states and 2696 transitions. [2021-12-07 00:55:40,952 INFO L78 Accepts]: Start accepts. Automaton has 1667 states and 2696 transitions. Word has length 77 [2021-12-07 00:55:40,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:55:40,953 INFO L470 AbstractCegarLoop]: Abstraction has 1667 states and 2696 transitions. [2021-12-07 00:55:40,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:55:40,953 INFO L276 IsEmpty]: Start isEmpty. Operand 1667 states and 2696 transitions. [2021-12-07 00:55:40,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-07 00:55:40,955 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:55:40,955 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] [2021-12-07 00:55:40,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-07 00:55:40,956 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:55:40,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:55:40,956 INFO L85 PathProgramCache]: Analyzing trace with hash 786172563, now seen corresponding path program 1 times [2021-12-07 00:55:40,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:55:40,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329425453] [2021-12-07 00:55:40,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:55:40,957 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:55:40,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:55:41,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:55:41,039 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:55:41,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329425453] [2021-12-07 00:55:41,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329425453] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:55:41,040 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:55:41,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 00:55:41,040 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49815980] [2021-12-07 00:55:41,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:55:41,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 00:55:41,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:55:41,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 00:55:41,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:55:41,042 INFO L87 Difference]: Start difference. First operand 1667 states and 2696 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:55:41,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:55:41,084 INFO L93 Difference]: Finished difference Result 1887 states and 3044 transitions. [2021-12-07 00:55:41,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 00:55:41,084 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 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 77 [2021-12-07 00:55:41,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:55:41,096 INFO L225 Difference]: With dead ends: 1887 [2021-12-07 00:55:41,096 INFO L226 Difference]: Without dead ends: 1771 [2021-12-07 00:55:41,098 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:55:41,099 INFO L933 BasicCegarLoop]: 1646 mSDtfsCounter, 1519 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1519 SdHoareTripleChecker+Valid, 1750 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:55:41,099 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1519 Valid, 1750 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:55:41,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1771 states. [2021-12-07 00:55:41,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1771 to 1769. [2021-12-07 00:55:41,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1769 states, 1767 states have (on average 1.6168647425014149) internal successors, (2857), 1768 states have internal predecessors, (2857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:55:41,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1769 states to 1769 states and 2857 transitions. [2021-12-07 00:55:41,152 INFO L78 Accepts]: Start accepts. Automaton has 1769 states and 2857 transitions. Word has length 77 [2021-12-07 00:55:41,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:55:41,152 INFO L470 AbstractCegarLoop]: Abstraction has 1769 states and 2857 transitions. [2021-12-07 00:55:41,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:55:41,153 INFO L276 IsEmpty]: Start isEmpty. Operand 1769 states and 2857 transitions. [2021-12-07 00:55:41,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-07 00:55:41,155 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:55:41,155 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] [2021-12-07 00:55:41,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-07 00:55:41,156 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:55:41,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:55:41,156 INFO L85 PathProgramCache]: Analyzing trace with hash -1153858295, now seen corresponding path program 1 times [2021-12-07 00:55:41,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:55:41,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966506700] [2021-12-07 00:55:41,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:55:41,157 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:55:41,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:55:41,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:55:41,221 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:55:41,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966506700] [2021-12-07 00:55:41,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966506700] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:55:41,222 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:55:41,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 00:55:41,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582862539] [2021-12-07 00:55:41,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:55:41,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 00:55:41,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:55:41,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 00:55:41,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:55:41,223 INFO L87 Difference]: Start difference. First operand 1769 states and 2857 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:55:41,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:55:41,253 INFO L93 Difference]: Finished difference Result 2181 states and 3507 transitions. [2021-12-07 00:55:41,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 00:55:41,254 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 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 77 [2021-12-07 00:55:41,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:55:41,265 INFO L225 Difference]: With dead ends: 2181 [2021-12-07 00:55:41,266 INFO L226 Difference]: Without dead ends: 1963 [2021-12-07 00:55:41,267 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:55:41,268 INFO L933 BasicCegarLoop]: 1641 mSDtfsCounter, 1515 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1515 SdHoareTripleChecker+Valid, 1749 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:55:41,268 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1515 Valid, 1749 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:55:41,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1963 states. [2021-12-07 00:55:41,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1963 to 1961. [2021-12-07 00:55:41,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1961 states, 1959 states have (on average 1.6115364982133742) internal successors, (3157), 1960 states have internal predecessors, (3157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:55:41,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1961 states to 1961 states and 3157 transitions. [2021-12-07 00:55:41,313 INFO L78 Accepts]: Start accepts. Automaton has 1961 states and 3157 transitions. Word has length 77 [2021-12-07 00:55:41,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:55:41,313 INFO L470 AbstractCegarLoop]: Abstraction has 1961 states and 3157 transitions. [2021-12-07 00:55:41,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:55:41,313 INFO L276 IsEmpty]: Start isEmpty. Operand 1961 states and 3157 transitions. [2021-12-07 00:55:41,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-07 00:55:41,314 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:55:41,314 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] [2021-12-07 00:55:41,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-07 00:55:41,315 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:55:41,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:55:41,315 INFO L85 PathProgramCache]: Analyzing trace with hash 1546824319, now seen corresponding path program 1 times [2021-12-07 00:55:41,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:55:41,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11011369] [2021-12-07 00:55:41,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:55:41,315 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:55:41,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:55:41,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:55:41,353 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:55:41,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11011369] [2021-12-07 00:55:41,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11011369] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:55:41,354 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:55:41,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 00:55:41,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357323760] [2021-12-07 00:55:41,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:55:41,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 00:55:41,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:55:41,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 00:55:41,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:55:41,355 INFO L87 Difference]: Start difference. First operand 1961 states and 3157 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:55:41,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:55:41,391 INFO L93 Difference]: Finished difference Result 2733 states and 4367 transitions. [2021-12-07 00:55:41,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 00:55:41,391 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 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 77 [2021-12-07 00:55:41,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:55:41,402 INFO L225 Difference]: With dead ends: 2733 [2021-12-07 00:55:41,402 INFO L226 Difference]: Without dead ends: 2323 [2021-12-07 00:55:41,403 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:55:41,404 INFO L933 BasicCegarLoop]: 1636 mSDtfsCounter, 1511 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1511 SdHoareTripleChecker+Valid, 1748 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:55:41,404 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1511 Valid, 1748 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:55:41,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2323 states. [2021-12-07 00:55:41,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2323 to 2321. [2021-12-07 00:55:41,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2321 states, 2319 states have (on average 1.6011211729193617) internal successors, (3713), 2320 states have internal predecessors, (3713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:55:41,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2321 states to 2321 states and 3713 transitions. [2021-12-07 00:55:41,453 INFO L78 Accepts]: Start accepts. Automaton has 2321 states and 3713 transitions. Word has length 77 [2021-12-07 00:55:41,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:55:41,454 INFO L470 AbstractCegarLoop]: Abstraction has 2321 states and 3713 transitions. [2021-12-07 00:55:41,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:55:41,454 INFO L276 IsEmpty]: Start isEmpty. Operand 2321 states and 3713 transitions. [2021-12-07 00:55:41,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-07 00:55:41,454 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:55:41,455 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] [2021-12-07 00:55:41,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-07 00:55:41,455 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:55:41,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:55:41,455 INFO L85 PathProgramCache]: Analyzing trace with hash 1884617461, now seen corresponding path program 1 times [2021-12-07 00:55:41,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:55:41,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478255609] [2021-12-07 00:55:41,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:55:41,456 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:55:41,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:55:41,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:55:41,492 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:55:41,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478255609] [2021-12-07 00:55:41,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478255609] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:55:41,493 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:55:41,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 00:55:41,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607368529] [2021-12-07 00:55:41,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:55:41,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 00:55:41,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:55:41,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 00:55:41,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:55:41,495 INFO L87 Difference]: Start difference. First operand 2321 states and 3713 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:55:41,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:55:41,563 INFO L93 Difference]: Finished difference Result 3765 states and 5955 transitions. [2021-12-07 00:55:41,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 00:55:41,564 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 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 77 [2021-12-07 00:55:41,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:55:41,577 INFO L225 Difference]: With dead ends: 3765 [2021-12-07 00:55:41,577 INFO L226 Difference]: Without dead ends: 2995 [2021-12-07 00:55:41,579 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:55:41,580 INFO L933 BasicCegarLoop]: 1631 mSDtfsCounter, 1507 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1507 SdHoareTripleChecker+Valid, 1747 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:55:41,580 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1507 Valid, 1747 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:55:41,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2995 states. [2021-12-07 00:55:41,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2995 to 2993. [2021-12-07 00:55:41,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2993 states, 2991 states have (on average 1.583751253761284) internal successors, (4737), 2992 states have internal predecessors, (4737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:55:41,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2993 states to 2993 states and 4737 transitions. [2021-12-07 00:55:41,646 INFO L78 Accepts]: Start accepts. Automaton has 2993 states and 4737 transitions. Word has length 77 [2021-12-07 00:55:41,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:55:41,646 INFO L470 AbstractCegarLoop]: Abstraction has 2993 states and 4737 transitions. [2021-12-07 00:55:41,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:55:41,646 INFO L276 IsEmpty]: Start isEmpty. Operand 2993 states and 4737 transitions. [2021-12-07 00:55:41,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-07 00:55:41,647 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:55:41,647 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] [2021-12-07 00:55:41,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-07 00:55:41,647 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:55:41,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:55:41,648 INFO L85 PathProgramCache]: Analyzing trace with hash -2001711063, now seen corresponding path program 1 times [2021-12-07 00:55:41,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:55:41,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078070915] [2021-12-07 00:55:41,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:55:41,648 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:55:41,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:55:41,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:55:41,706 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:55:41,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078070915] [2021-12-07 00:55:41,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078070915] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:55:41,706 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:55:41,706 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-07 00:55:41,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747621773] [2021-12-07 00:55:41,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:55:41,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-07 00:55:41,707 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:55:41,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-07 00:55:41,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-07 00:55:41,708 INFO L87 Difference]: Start difference. First operand 2993 states and 4737 transitions. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:55:42,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:55:42,302 INFO L93 Difference]: Finished difference Result 20297 states and 31437 transitions. [2021-12-07 00:55:42,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-07 00:55:42,303 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 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 77 [2021-12-07 00:55:42,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:55:42,392 INFO L225 Difference]: With dead ends: 20297 [2021-12-07 00:55:42,392 INFO L226 Difference]: Without dead ends: 18855 [2021-12-07 00:55:42,400 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2021-12-07 00:55:42,400 INFO L933 BasicCegarLoop]: 1579 mSDtfsCounter, 10553 mSDsluCounter, 1813 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10553 SdHoareTripleChecker+Valid, 3392 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:55:42,401 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10553 Valid, 3392 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 00:55:42,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18855 states. [2021-12-07 00:55:42,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18855 to 4433. [2021-12-07 00:55:42,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4433 states, 4431 states have (on average 1.5565335138794854) internal successors, (6897), 4432 states have internal predecessors, (6897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:55:42,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4433 states to 4433 states and 6897 transitions. [2021-12-07 00:55:42,674 INFO L78 Accepts]: Start accepts. Automaton has 4433 states and 6897 transitions. Word has length 77 [2021-12-07 00:55:42,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:55:42,674 INFO L470 AbstractCegarLoop]: Abstraction has 4433 states and 6897 transitions. [2021-12-07 00:55:42,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:55:42,674 INFO L276 IsEmpty]: Start isEmpty. Operand 4433 states and 6897 transitions. [2021-12-07 00:55:42,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-07 00:55:42,675 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:55:42,675 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] [2021-12-07 00:55:42,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-07 00:55:42,676 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:55:42,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:55:42,676 INFO L85 PathProgramCache]: Analyzing trace with hash -914675591, now seen corresponding path program 1 times [2021-12-07 00:55:42,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:55:42,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976784264] [2021-12-07 00:55:42,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:55:42,676 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:55:42,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:55:42,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:55:42,718 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:55:42,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976784264] [2021-12-07 00:55:42,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976784264] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:55:42,718 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:55:42,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 00:55:42,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982370945] [2021-12-07 00:55:42,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:55:42,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 00:55:42,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:55:42,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 00:55:42,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:55:42,720 INFO L87 Difference]: Start difference. First operand 4433 states and 6897 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:55:42,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:55:42,895 INFO L93 Difference]: Finished difference Result 9845 states and 15059 transitions. [2021-12-07 00:55:42,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 00:55:42,896 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 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 79 [2021-12-07 00:55:42,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:55:42,911 INFO L225 Difference]: With dead ends: 9845 [2021-12-07 00:55:42,911 INFO L226 Difference]: Without dead ends: 6963 [2021-12-07 00:55:42,917 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:55:42,918 INFO L933 BasicCegarLoop]: 1580 mSDtfsCounter, 1498 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1498 SdHoareTripleChecker+Valid, 1671 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:55:42,918 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1498 Valid, 1671 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:55:42,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6963 states. [2021-12-07 00:55:43,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6963 to 6897. [2021-12-07 00:55:43,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6897 states, 6895 states have (on average 1.5154459753444525) internal successors, (10449), 6896 states have internal predecessors, (10449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:55:43,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6897 states to 6897 states and 10449 transitions. [2021-12-07 00:55:43,169 INFO L78 Accepts]: Start accepts. Automaton has 6897 states and 10449 transitions. Word has length 79 [2021-12-07 00:55:43,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:55:43,169 INFO L470 AbstractCegarLoop]: Abstraction has 6897 states and 10449 transitions. [2021-12-07 00:55:43,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:55:43,170 INFO L276 IsEmpty]: Start isEmpty. Operand 6897 states and 10449 transitions. [2021-12-07 00:55:43,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-07 00:55:43,170 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:55:43,170 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] [2021-12-07 00:55:43,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-07 00:55:43,171 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:55:43,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:55:43,171 INFO L85 PathProgramCache]: Analyzing trace with hash -848182079, now seen corresponding path program 1 times [2021-12-07 00:55:43,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:55:43,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509792317] [2021-12-07 00:55:43,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:55:43,171 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:55:43,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:55:43,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:55:43,309 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:55:43,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509792317] [2021-12-07 00:55:43,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509792317] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:55:43,309 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:55:43,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-07 00:55:43,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090018545] [2021-12-07 00:55:43,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:55:43,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-07 00:55:43,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:55:43,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-07 00:55:43,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-12-07 00:55:43,310 INFO L87 Difference]: Start difference. First operand 6897 states and 10449 transitions. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:55:43,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:55:43,606 INFO L93 Difference]: Finished difference Result 12245 states and 18387 transitions. [2021-12-07 00:55:43,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-07 00:55:43,607 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 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 79 [2021-12-07 00:55:43,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:55:43,617 INFO L225 Difference]: With dead ends: 12245 [2021-12-07 00:55:43,617 INFO L226 Difference]: Without dead ends: 6899 [2021-12-07 00:55:43,623 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-12-07 00:55:43,623 INFO L933 BasicCegarLoop]: 1575 mSDtfsCounter, 7790 mSDsluCounter, 473 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7790 SdHoareTripleChecker+Valid, 2048 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:55:43,623 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7790 Valid, 2048 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:55:43,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6899 states. [2021-12-07 00:55:43,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6899 to 6897. [2021-12-07 00:55:43,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6897 states, 6895 states have (on average 1.5061638868745468) internal successors, (10385), 6896 states have internal predecessors, (10385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:55:43,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6897 states to 6897 states and 10385 transitions. [2021-12-07 00:55:43,816 INFO L78 Accepts]: Start accepts. Automaton has 6897 states and 10385 transitions. Word has length 79 [2021-12-07 00:55:43,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:55:43,816 INFO L470 AbstractCegarLoop]: Abstraction has 6897 states and 10385 transitions. [2021-12-07 00:55:43,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:55:43,816 INFO L276 IsEmpty]: Start isEmpty. Operand 6897 states and 10385 transitions. [2021-12-07 00:55:43,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-12-07 00:55:43,817 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:55:43,817 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] [2021-12-07 00:55:43,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-07 00:55:43,817 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:55:43,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:55:43,818 INFO L85 PathProgramCache]: Analyzing trace with hash -938563623, now seen corresponding path program 1 times [2021-12-07 00:55:43,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:55:43,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609247970] [2021-12-07 00:55:43,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:55:43,818 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:55:43,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:55:43,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:55:43,870 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:55:43,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609247970] [2021-12-07 00:55:43,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609247970] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:55:43,870 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:55:43,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-07 00:55:43,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872772441] [2021-12-07 00:55:43,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:55:43,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-07 00:55:43,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:55:43,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-07 00:55:43,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-07 00:55:43,871 INFO L87 Difference]: Start difference. First operand 6897 states and 10385 transitions. Second operand has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:55:44,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:55:44,145 INFO L93 Difference]: Finished difference Result 12243 states and 18258 transitions. [2021-12-07 00:55:44,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-07 00:55:44,145 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 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 80 [2021-12-07 00:55:44,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:55:44,156 INFO L225 Difference]: With dead ends: 12243 [2021-12-07 00:55:44,157 INFO L226 Difference]: Without dead ends: 6897 [2021-12-07 00:55:44,163 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-07 00:55:44,164 INFO L933 BasicCegarLoop]: 1535 mSDtfsCounter, 4648 mSDsluCounter, 1520 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4648 SdHoareTripleChecker+Valid, 3055 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:55:44,164 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4648 Valid, 3055 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:55:44,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6897 states. [2021-12-07 00:55:44,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6897 to 6897. [2021-12-07 00:55:44,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6897 states, 6895 states have (on average 1.496881798404641) internal successors, (10321), 6896 states have internal predecessors, (10321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:55:44,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6897 states to 6897 states and 10321 transitions. [2021-12-07 00:55:44,422 INFO L78 Accepts]: Start accepts. Automaton has 6897 states and 10321 transitions. Word has length 80 [2021-12-07 00:55:44,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:55:44,423 INFO L470 AbstractCegarLoop]: Abstraction has 6897 states and 10321 transitions. [2021-12-07 00:55:44,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:55:44,423 INFO L276 IsEmpty]: Start isEmpty. Operand 6897 states and 10321 transitions. [2021-12-07 00:55:44,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-12-07 00:55:44,424 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:55:44,424 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] [2021-12-07 00:55:44,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-07 00:55:44,425 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:55:44,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:55:44,425 INFO L85 PathProgramCache]: Analyzing trace with hash -1639628201, now seen corresponding path program 1 times [2021-12-07 00:55:44,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:55:44,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255681029] [2021-12-07 00:55:44,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:55:44,426 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:55:44,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:55:44,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:55:44,475 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:55:44,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255681029] [2021-12-07 00:55:44,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255681029] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:55:44,475 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:55:44,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-07 00:55:44,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482269992] [2021-12-07 00:55:44,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:55:44,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-07 00:55:44,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:55:44,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-07 00:55:44,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-07 00:55:44,477 INFO L87 Difference]: Start difference. First operand 6897 states and 10321 transitions. Second operand has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:55:44,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:55:44,929 INFO L93 Difference]: Finished difference Result 10867 states and 16028 transitions. [2021-12-07 00:55:44,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-07 00:55:44,930 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 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 80 [2021-12-07 00:55:44,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:55:44,941 INFO L225 Difference]: With dead ends: 10867 [2021-12-07 00:55:44,941 INFO L226 Difference]: Without dead ends: 10865 [2021-12-07 00:55:44,943 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-07 00:55:44,944 INFO L933 BasicCegarLoop]: 1631 mSDtfsCounter, 261 mSDsluCounter, 4748 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 6379 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:55:44,944 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [261 Valid, 6379 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:55:44,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10865 states. [2021-12-07 00:55:45,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10865 to 7089. [2021-12-07 00:55:45,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7089 states, 7087 states have (on average 1.4789050373924086) internal successors, (10481), 7088 states have internal predecessors, (10481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:55:45,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7089 states to 7089 states and 10481 transitions. [2021-12-07 00:55:45,193 INFO L78 Accepts]: Start accepts. Automaton has 7089 states and 10481 transitions. Word has length 80 [2021-12-07 00:55:45,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:55:45,193 INFO L470 AbstractCegarLoop]: Abstraction has 7089 states and 10481 transitions. [2021-12-07 00:55:45,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:55:45,193 INFO L276 IsEmpty]: Start isEmpty. Operand 7089 states and 10481 transitions. [2021-12-07 00:55:45,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-12-07 00:55:45,194 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:55:45,194 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] [2021-12-07 00:55:45,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-07 00:55:45,194 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:55:45,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:55:45,194 INFO L85 PathProgramCache]: Analyzing trace with hash 492740282, now seen corresponding path program 1 times [2021-12-07 00:55:45,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:55:45,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342012126] [2021-12-07 00:55:45,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:55:45,195 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:55:45,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:55:45,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:55:45,218 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:55:45,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342012126] [2021-12-07 00:55:45,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342012126] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:55:45,219 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:55:45,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 00:55:45,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587206864] [2021-12-07 00:55:45,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:55:45,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 00:55:45,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:55:45,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 00:55:45,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:55:45,220 INFO L87 Difference]: Start difference. First operand 7089 states and 10481 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:55:45,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:55:45,516 INFO L93 Difference]: Finished difference Result 12728 states and 18679 transitions. [2021-12-07 00:55:45,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 00:55:45,516 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 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 81 [2021-12-07 00:55:45,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:55:45,527 INFO L225 Difference]: With dead ends: 12728 [2021-12-07 00:55:45,527 INFO L226 Difference]: Without dead ends: 9653 [2021-12-07 00:55:45,532 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:55:45,533 INFO L933 BasicCegarLoop]: 1658 mSDtfsCounter, 1523 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1523 SdHoareTripleChecker+Valid, 1753 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:55:45,534 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1523 Valid, 1753 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:55:45,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9653 states. [2021-12-07 00:55:45,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9653 to 9651. [2021-12-07 00:55:45,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9651 states, 9649 states have (on average 1.4611876878432999) internal successors, (14099), 9650 states have internal predecessors, (14099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:55:45,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9651 states to 9651 states and 14099 transitions. [2021-12-07 00:55:45,877 INFO L78 Accepts]: Start accepts. Automaton has 9651 states and 14099 transitions. Word has length 81 [2021-12-07 00:55:45,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:55:45,878 INFO L470 AbstractCegarLoop]: Abstraction has 9651 states and 14099 transitions. [2021-12-07 00:55:45,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:55:45,878 INFO L276 IsEmpty]: Start isEmpty. Operand 9651 states and 14099 transitions. [2021-12-07 00:55:45,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-07 00:55:45,878 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:55:45,879 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-07 00:55:45,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-07 00:55:45,879 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:55:45,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:55:45,879 INFO L85 PathProgramCache]: Analyzing trace with hash 684368052, now seen corresponding path program 1 times [2021-12-07 00:55:45,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:55:45,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810558990] [2021-12-07 00:55:45,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:55:45,879 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:55:45,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:55:45,931 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:55:45,931 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:55:45,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810558990] [2021-12-07 00:55:45,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810558990] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:55:45,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297444986] [2021-12-07 00:55:45,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:55:45,932 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:55:45,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20ef957-d96d-4d1a-8e71-49bb82a1fba2/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:55:45,935 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20ef957-d96d-4d1a-8e71-49bb82a1fba2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:55:45,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20ef957-d96d-4d1a-8e71-49bb82a1fba2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-07 00:55:46,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:55:46,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-07 00:55:46,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:55:46,093 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:55:46,093 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 00:55:46,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297444986] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:55:46,094 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-07 00:55:46,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-12-07 00:55:46,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250767921] [2021-12-07 00:55:46,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:55:46,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 00:55:46,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:55:46,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 00:55:46,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-07 00:55:46,095 INFO L87 Difference]: Start difference. First operand 9651 states and 14099 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:55:48,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:55:48,792 INFO L93 Difference]: Finished difference Result 12657 states and 19026 transitions. [2021-12-07 00:55:48,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 00:55:48,792 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 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 91 [2021-12-07 00:55:48,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:55:48,801 INFO L225 Difference]: With dead ends: 12657 [2021-12-07 00:55:48,801 INFO L226 Difference]: Without dead ends: 11153 [2021-12-07 00:55:48,803 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-07 00:55:48,804 INFO L933 BasicCegarLoop]: 611 mSDtfsCounter, 924 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2197 mSolverCounterSat, 717 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 924 SdHoareTripleChecker+Valid, 618 SdHoareTripleChecker+Invalid, 2914 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 717 IncrementalHoareTripleChecker+Valid, 2197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-07 00:55:48,804 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [924 Valid, 618 Invalid, 2914 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [717 Valid, 2197 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-07 00:55:48,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11153 states. [2021-12-07 00:55:49,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11153 to 11153. [2021-12-07 00:55:49,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11153 states, 11151 states have (on average 1.4275849699578513) internal successors, (15919), 11152 states have internal predecessors, (15919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:55:49,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11153 states to 11153 states and 15919 transitions. [2021-12-07 00:55:49,173 INFO L78 Accepts]: Start accepts. Automaton has 11153 states and 15919 transitions. Word has length 91 [2021-12-07 00:55:49,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:55:49,173 INFO L470 AbstractCegarLoop]: Abstraction has 11153 states and 15919 transitions. [2021-12-07 00:55:49,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:55:49,174 INFO L276 IsEmpty]: Start isEmpty. Operand 11153 states and 15919 transitions. [2021-12-07 00:55:49,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-07 00:55:49,175 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:55:49,175 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-07 00:55:49,195 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20ef957-d96d-4d1a-8e71-49bb82a1fba2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-07 00:55:49,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20ef957-d96d-4d1a-8e71-49bb82a1fba2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:55:49,377 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:55:49,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:55:49,379 INFO L85 PathProgramCache]: Analyzing trace with hash 626430014, now seen corresponding path program 1 times [2021-12-07 00:55:49,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:55:49,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706787614] [2021-12-07 00:55:49,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:55:49,381 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:55:49,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:55:49,474 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:55:49,474 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:55:49,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706787614] [2021-12-07 00:55:49,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706787614] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:55:49,474 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:55:49,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-07 00:55:49,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913788213] [2021-12-07 00:55:49,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:55:49,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-07 00:55:49,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:55:49,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-07 00:55:49,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-07 00:55:49,475 INFO L87 Difference]: Start difference. First operand 11153 states and 15919 transitions. Second operand has 5 states, 5 states have (on average 19.0) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:55:52,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:55:52,499 INFO L93 Difference]: Finished difference Result 14926 states and 21060 transitions. [2021-12-07 00:55:52,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-07 00:55:52,499 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 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 95 [2021-12-07 00:55:52,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:55:52,508 INFO L225 Difference]: With dead ends: 14926 [2021-12-07 00:55:52,508 INFO L226 Difference]: Without dead ends: 11920 [2021-12-07 00:55:52,510 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-07 00:55:52,511 INFO L933 BasicCegarLoop]: 840 mSDtfsCounter, 1574 mSDsluCounter, 1102 mSDsCounter, 0 mSdLazyCounter, 3930 mSolverCounterSat, 274 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1574 SdHoareTripleChecker+Valid, 1942 SdHoareTripleChecker+Invalid, 4204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 274 IncrementalHoareTripleChecker+Valid, 3930 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-07 00:55:52,511 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1574 Valid, 1942 Invalid, 4204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [274 Valid, 3930 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-07 00:55:52,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11920 states. [2021-12-07 00:55:52,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11920 to 11904. [2021-12-07 00:55:52,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11904 states, 11902 states have (on average 1.4011090573012939) internal successors, (16676), 11903 states have internal predecessors, (16676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:55:52,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11904 states to 11904 states and 16676 transitions. [2021-12-07 00:55:52,895 INFO L78 Accepts]: Start accepts. Automaton has 11904 states and 16676 transitions. Word has length 95 [2021-12-07 00:55:52,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:55:52,895 INFO L470 AbstractCegarLoop]: Abstraction has 11904 states and 16676 transitions. [2021-12-07 00:55:52,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:55:52,895 INFO L276 IsEmpty]: Start isEmpty. Operand 11904 states and 16676 transitions. [2021-12-07 00:55:52,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-07 00:55:52,899 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:55:52,899 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-07 00:55:52,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-07 00:55:52,899 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:55:52,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:55:52,899 INFO L85 PathProgramCache]: Analyzing trace with hash -1561529476, now seen corresponding path program 1 times [2021-12-07 00:55:52,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:55:52,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497230605] [2021-12-07 00:55:52,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:55:52,900 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:55:52,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:55:52,963 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-07 00:55:52,964 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:55:52,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497230605] [2021-12-07 00:55:52,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497230605] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:55:52,964 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:55:52,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-07 00:55:52,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468580436] [2021-12-07 00:55:52,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:55:52,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-07 00:55:52,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:55:52,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-07 00:55:52,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-07 00:55:52,965 INFO L87 Difference]: Start difference. First operand 11904 states and 16676 transitions. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:55:55,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:55:55,097 INFO L93 Difference]: Finished difference Result 62094 states and 88395 transitions. [2021-12-07 00:55:55,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-07 00:55:55,098 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 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 112 [2021-12-07 00:55:55,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:55:55,156 INFO L225 Difference]: With dead ends: 62094 [2021-12-07 00:55:55,156 INFO L226 Difference]: Without dead ends: 53996 [2021-12-07 00:55:55,172 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-12-07 00:55:55,172 INFO L933 BasicCegarLoop]: 1668 mSDtfsCounter, 8634 mSDsluCounter, 2165 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8634 SdHoareTripleChecker+Valid, 3833 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:55:55,173 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8634 Valid, 3833 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 00:55:55,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53996 states. [2021-12-07 00:55:56,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53996 to 20000. [2021-12-07 00:55:56,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20000 states, 19998 states have (on average 1.4083408340834083) internal successors, (28164), 19999 states have internal predecessors, (28164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:55:56,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20000 states to 20000 states and 28164 transitions. [2021-12-07 00:55:56,183 INFO L78 Accepts]: Start accepts. Automaton has 20000 states and 28164 transitions. Word has length 112 [2021-12-07 00:55:56,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:55:56,183 INFO L470 AbstractCegarLoop]: Abstraction has 20000 states and 28164 transitions. [2021-12-07 00:55:56,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:55:56,184 INFO L276 IsEmpty]: Start isEmpty. Operand 20000 states and 28164 transitions. [2021-12-07 00:55:56,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-07 00:55:56,188 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:55:56,188 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-07 00:55:56,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-07 00:55:56,188 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:55:56,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:55:56,188 INFO L85 PathProgramCache]: Analyzing trace with hash 964655004, now seen corresponding path program 1 times [2021-12-07 00:55:56,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:55:56,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076476921] [2021-12-07 00:55:56,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:55:56,189 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:55:56,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:55:56,249 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-07 00:55:56,249 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:55:56,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076476921] [2021-12-07 00:55:56,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076476921] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:55:56,249 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:55:56,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-07 00:55:56,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025142969] [2021-12-07 00:55:56,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:55:56,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-07 00:55:56,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:55:56,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-07 00:55:56,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-07 00:55:56,250 INFO L87 Difference]: Start difference. First operand 20000 states and 28164 transitions. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:55:59,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:55:59,058 INFO L93 Difference]: Finished difference Result 70190 states and 99883 transitions. [2021-12-07 00:55:59,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-07 00:55:59,059 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 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 112 [2021-12-07 00:55:59,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:55:59,124 INFO L225 Difference]: With dead ends: 70190 [2021-12-07 00:55:59,125 INFO L226 Difference]: Without dead ends: 62092 [2021-12-07 00:55:59,142 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-12-07 00:55:59,143 INFO L933 BasicCegarLoop]: 1670 mSDtfsCounter, 8455 mSDsluCounter, 2233 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8455 SdHoareTripleChecker+Valid, 3903 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:55:59,143 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8455 Valid, 3903 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 00:55:59,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62092 states. [2021-12-07 00:56:00,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62092 to 32160. [2021-12-07 00:56:00,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32160 states, 32158 states have (on average 1.4091672367684558) internal successors, (45316), 32159 states have internal predecessors, (45316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:56:00,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32160 states to 32160 states and 45316 transitions. [2021-12-07 00:56:00,880 INFO L78 Accepts]: Start accepts. Automaton has 32160 states and 45316 transitions. Word has length 112 [2021-12-07 00:56:00,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:56:00,880 INFO L470 AbstractCegarLoop]: Abstraction has 32160 states and 45316 transitions. [2021-12-07 00:56:00,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:56:00,880 INFO L276 IsEmpty]: Start isEmpty. Operand 32160 states and 45316 transitions. [2021-12-07 00:56:00,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-07 00:56:00,886 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:56:00,886 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-07 00:56:00,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-07 00:56:00,886 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:56:00,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:56:00,887 INFO L85 PathProgramCache]: Analyzing trace with hash 2096294844, now seen corresponding path program 1 times [2021-12-07 00:56:00,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:56:00,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126289804] [2021-12-07 00:56:00,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:56:00,887 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:56:00,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:00,950 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-07 00:56:00,950 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:56:00,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126289804] [2021-12-07 00:56:00,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126289804] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:56:00,950 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:56:00,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-07 00:56:00,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598685326] [2021-12-07 00:56:00,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:56:00,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-07 00:56:00,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:56:00,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-07 00:56:00,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-07 00:56:00,952 INFO L87 Difference]: Start difference. First operand 32160 states and 45316 transitions. Second operand has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:56:04,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:56:04,446 INFO L93 Difference]: Finished difference Result 78286 states and 111371 transitions. [2021-12-07 00:56:04,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-07 00:56:04,447 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 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 112 [2021-12-07 00:56:04,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:56:04,521 INFO L225 Difference]: With dead ends: 78286 [2021-12-07 00:56:04,521 INFO L226 Difference]: Without dead ends: 70188 [2021-12-07 00:56:04,537 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-12-07 00:56:04,537 INFO L933 BasicCegarLoop]: 1670 mSDtfsCounter, 8425 mSDsluCounter, 2255 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8425 SdHoareTripleChecker+Valid, 3925 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:56:04,538 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8425 Valid, 3925 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 00:56:04,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70188 states. [2021-12-07 00:56:06,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70188 to 40256. [2021-12-07 00:56:06,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40256 states, 40254 states have (on average 1.4111392656630397) internal successors, (56804), 40255 states have internal predecessors, (56804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:56:07,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40256 states to 40256 states and 56804 transitions. [2021-12-07 00:56:07,009 INFO L78 Accepts]: Start accepts. Automaton has 40256 states and 56804 transitions. Word has length 112 [2021-12-07 00:56:07,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:56:07,009 INFO L470 AbstractCegarLoop]: Abstraction has 40256 states and 56804 transitions. [2021-12-07 00:56:07,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:56:07,010 INFO L276 IsEmpty]: Start isEmpty. Operand 40256 states and 56804 transitions. [2021-12-07 00:56:07,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-07 00:56:07,015 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:56:07,015 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-07 00:56:07,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-07 00:56:07,015 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:56:07,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:56:07,016 INFO L85 PathProgramCache]: Analyzing trace with hash 860835804, now seen corresponding path program 1 times [2021-12-07 00:56:07,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:56:07,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313510533] [2021-12-07 00:56:07,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:56:07,016 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:56:07,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:07,073 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-07 00:56:07,073 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:56:07,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313510533] [2021-12-07 00:56:07,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313510533] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:56:07,073 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:56:07,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-07 00:56:07,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289974853] [2021-12-07 00:56:07,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:56:07,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-07 00:56:07,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:56:07,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-07 00:56:07,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-07 00:56:07,074 INFO L87 Difference]: Start difference. First operand 40256 states and 56804 transitions. Second operand has 8 states, 8 states have (on average 13.25) internal successors, (106), 8 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:56:11,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:56:11,245 INFO L93 Difference]: Finished difference Result 86382 states and 122859 transitions. [2021-12-07 00:56:11,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-07 00:56:11,246 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 13.25) internal successors, (106), 8 states have internal predecessors, (106), 0 states have call successors, (0), 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 112 [2021-12-07 00:56:11,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:56:11,334 INFO L225 Difference]: With dead ends: 86382 [2021-12-07 00:56:11,335 INFO L226 Difference]: Without dead ends: 78284 [2021-12-07 00:56:11,355 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-12-07 00:56:11,356 INFO L933 BasicCegarLoop]: 1670 mSDtfsCounter, 8497 mSDsluCounter, 2274 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8497 SdHoareTripleChecker+Valid, 3944 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:56:11,356 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8497 Valid, 3944 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 00:56:11,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78284 states. [2021-12-07 00:56:14,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78284 to 48352. [2021-12-07 00:56:14,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48352 states, 48350 states have (on average 1.412450879007239) internal successors, (68292), 48351 states have internal predecessors, (68292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:56:14,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48352 states to 48352 states and 68292 transitions. [2021-12-07 00:56:14,547 INFO L78 Accepts]: Start accepts. Automaton has 48352 states and 68292 transitions. Word has length 112 [2021-12-07 00:56:14,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:56:14,547 INFO L470 AbstractCegarLoop]: Abstraction has 48352 states and 68292 transitions. [2021-12-07 00:56:14,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.25) internal successors, (106), 8 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:56:14,547 INFO L276 IsEmpty]: Start isEmpty. Operand 48352 states and 68292 transitions. [2021-12-07 00:56:14,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-07 00:56:14,552 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:56:14,552 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-07 00:56:14,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-07 00:56:14,553 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:56:14,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:56:14,553 INFO L85 PathProgramCache]: Analyzing trace with hash -560159748, now seen corresponding path program 1 times [2021-12-07 00:56:14,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:56:14,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984926040] [2021-12-07 00:56:14,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:56:14,553 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:56:14,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:14,609 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-07 00:56:14,609 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:56:14,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984926040] [2021-12-07 00:56:14,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984926040] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:56:14,609 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:56:14,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-07 00:56:14,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100840664] [2021-12-07 00:56:14,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:56:14,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-07 00:56:14,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:56:14,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-07 00:56:14,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-07 00:56:14,611 INFO L87 Difference]: Start difference. First operand 48352 states and 68292 transitions. Second operand has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:56:19,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:56:19,692 INFO L93 Difference]: Finished difference Result 94478 states and 134347 transitions. [2021-12-07 00:56:19,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-07 00:56:19,693 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 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 112 [2021-12-07 00:56:19,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:56:19,788 INFO L225 Difference]: With dead ends: 94478 [2021-12-07 00:56:19,788 INFO L226 Difference]: Without dead ends: 86380 [2021-12-07 00:56:19,809 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-12-07 00:56:19,810 INFO L933 BasicCegarLoop]: 1668 mSDtfsCounter, 8611 mSDsluCounter, 2217 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8611 SdHoareTripleChecker+Valid, 3885 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:56:19,810 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8611 Valid, 3885 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 00:56:19,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86380 states. [2021-12-07 00:56:23,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86380 to 56448. [2021-12-07 00:56:23,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56448 states, 56446 states have (on average 1.4133862452609574) internal successors, (79780), 56447 states have internal predecessors, (79780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:56:23,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56448 states to 56448 states and 79780 transitions. [2021-12-07 00:56:23,780 INFO L78 Accepts]: Start accepts. Automaton has 56448 states and 79780 transitions. Word has length 112 [2021-12-07 00:56:23,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:56:23,780 INFO L470 AbstractCegarLoop]: Abstraction has 56448 states and 79780 transitions. [2021-12-07 00:56:23,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:56:23,780 INFO L276 IsEmpty]: Start isEmpty. Operand 56448 states and 79780 transitions. [2021-12-07 00:56:23,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-12-07 00:56:23,789 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:56:23,789 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-07 00:56:23,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-07 00:56:23,789 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:56:23,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:56:23,789 INFO L85 PathProgramCache]: Analyzing trace with hash 1259528020, now seen corresponding path program 1 times [2021-12-07 00:56:23,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:56:23,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661405278] [2021-12-07 00:56:23,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:56:23,790 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:56:23,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:23,822 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:56:23,822 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:56:23,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661405278] [2021-12-07 00:56:23,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661405278] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:56:23,822 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:56:23,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 00:56:23,822 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271347929] [2021-12-07 00:56:23,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:56:23,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 00:56:23,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:56:23,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 00:56:23,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:56:23,823 INFO L87 Difference]: Start difference. First operand 56448 states and 79780 transitions. Second operand has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:56:26,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:56:26,217 INFO L93 Difference]: Finished difference Result 93094 states and 132238 transitions. [2021-12-07 00:56:26,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 00:56:26,218 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 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 114 [2021-12-07 00:56:26,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:56:26,257 INFO L225 Difference]: With dead ends: 93094 [2021-12-07 00:56:26,258 INFO L226 Difference]: Without dead ends: 40452 [2021-12-07 00:56:26,280 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:56:26,281 INFO L933 BasicCegarLoop]: 1630 mSDtfsCounter, 62 mSDsluCounter, 1566 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 3196 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:56:26,281 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 3196 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:56:26,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40452 states. [2021-12-07 00:56:28,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40452 to 40450. [2021-12-07 00:56:28,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40450 states, 40448 states have (on average 1.4124554984177216) internal successors, (57131), 40449 states have internal predecessors, (57131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:56:28,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40450 states to 40450 states and 57131 transitions. [2021-12-07 00:56:28,873 INFO L78 Accepts]: Start accepts. Automaton has 40450 states and 57131 transitions. Word has length 114 [2021-12-07 00:56:28,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:56:28,873 INFO L470 AbstractCegarLoop]: Abstraction has 40450 states and 57131 transitions. [2021-12-07 00:56:28,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:56:28,873 INFO L276 IsEmpty]: Start isEmpty. Operand 40450 states and 57131 transitions. [2021-12-07 00:56:28,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-12-07 00:56:28,878 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:56:28,878 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-07 00:56:28,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-07 00:56:28,878 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:56:28,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:56:28,878 INFO L85 PathProgramCache]: Analyzing trace with hash -1037894815, now seen corresponding path program 1 times [2021-12-07 00:56:28,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:56:28,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869387768] [2021-12-07 00:56:28,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:56:28,879 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:56:28,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:28,935 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-07 00:56:28,936 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:56:28,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869387768] [2021-12-07 00:56:28,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869387768] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:56:28,936 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:56:28,936 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-07 00:56:28,936 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482885704] [2021-12-07 00:56:28,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:56:28,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-07 00:56:28,937 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:56:28,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-07 00:56:28,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-07 00:56:28,937 INFO L87 Difference]: Start difference. First operand 40450 states and 57131 transitions. Second operand has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:56:33,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:56:33,626 INFO L93 Difference]: Finished difference Result 74256 states and 105522 transitions. [2021-12-07 00:56:33,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-07 00:56:33,627 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 114 [2021-12-07 00:56:33,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:56:33,703 INFO L225 Difference]: With dead ends: 74256 [2021-12-07 00:56:33,703 INFO L226 Difference]: Without dead ends: 68622 [2021-12-07 00:56:33,720 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-12-07 00:56:33,721 INFO L933 BasicCegarLoop]: 1667 mSDtfsCounter, 8581 mSDsluCounter, 2175 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8581 SdHoareTripleChecker+Valid, 3842 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:56:33,721 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8581 Valid, 3842 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 00:56:33,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68622 states. [2021-12-07 00:56:36,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68622 to 46082. [2021-12-07 00:56:36,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46082 states, 46080 states have (on average 1.4134331597222223) internal successors, (65131), 46081 states have internal predecessors, (65131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:56:36,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46082 states to 46082 states and 65131 transitions. [2021-12-07 00:56:36,975 INFO L78 Accepts]: Start accepts. Automaton has 46082 states and 65131 transitions. Word has length 114 [2021-12-07 00:56:36,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:56:36,975 INFO L470 AbstractCegarLoop]: Abstraction has 46082 states and 65131 transitions. [2021-12-07 00:56:36,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:56:36,975 INFO L276 IsEmpty]: Start isEmpty. Operand 46082 states and 65131 transitions. [2021-12-07 00:56:36,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-12-07 00:56:36,981 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:56:36,981 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-07 00:56:36,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-07 00:56:36,981 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:56:36,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:56:36,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1184656150, now seen corresponding path program 1 times [2021-12-07 00:56:36,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:56:36,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915159432] [2021-12-07 00:56:36,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:56:36,982 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:56:37,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:37,163 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:56:37,163 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:56:37,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915159432] [2021-12-07 00:56:37,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915159432] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:56:37,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660208473] [2021-12-07 00:56:37,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:56:37,163 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:56:37,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20ef957-d96d-4d1a-8e71-49bb82a1fba2/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:56:37,164 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20ef957-d96d-4d1a-8e71-49bb82a1fba2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:56:37,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20ef957-d96d-4d1a-8e71-49bb82a1fba2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-07 00:56:37,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:37,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-07 00:56:37,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:56:37,564 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-07 00:56:37,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:56:37,744 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-07 00:56:37,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660208473] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:56:37,744 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:56:37,744 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 4, 4] total 18 [2021-12-07 00:56:37,744 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421486974] [2021-12-07 00:56:37,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:56:37,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-07 00:56:37,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:56:37,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-07 00:56:37,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-12-07 00:56:37,746 INFO L87 Difference]: Start difference. First operand 46082 states and 65131 transitions. Second operand has 18 states, 18 states have (on average 18.22222222222222) internal successors, (328), 18 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:57:31,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:57:31,133 INFO L93 Difference]: Finished difference Result 677699 states and 953918 transitions. [2021-12-07 00:57:31,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2021-12-07 00:57:31,134 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 18.22222222222222) internal successors, (328), 18 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-12-07 00:57:31,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:57:31,991 INFO L225 Difference]: With dead ends: 677699 [2021-12-07 00:57:31,991 INFO L226 Difference]: Without dead ends: 635457 [2021-12-07 00:57:32,119 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 365 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8270 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3332, Invalid=16408, Unknown=0, NotChecked=0, Total=19740 [2021-12-07 00:57:32,119 INFO L933 BasicCegarLoop]: 1652 mSDtfsCounter, 22909 mSDsluCounter, 5979 mSDsCounter, 0 mSdLazyCounter, 1741 mSolverCounterSat, 326 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22909 SdHoareTripleChecker+Valid, 7631 SdHoareTripleChecker+Invalid, 2067 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 326 IncrementalHoareTripleChecker+Valid, 1741 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-07 00:57:32,119 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22909 Valid, 7631 Invalid, 2067 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [326 Valid, 1741 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-07 00:57:32,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635457 states. [2021-12-07 00:58:00,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635457 to 314818. [2021-12-07 00:58:00,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314818 states, 314816 states have (on average 1.3773188147997562) internal successors, (433602), 314817 states have internal predecessors, (433602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:58:00,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314818 states to 314818 states and 433602 transitions. [2021-12-07 00:58:00,899 INFO L78 Accepts]: Start accepts. Automaton has 314818 states and 433602 transitions. Word has length 115 [2021-12-07 00:58:00,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:58:00,900 INFO L470 AbstractCegarLoop]: Abstraction has 314818 states and 433602 transitions. [2021-12-07 00:58:00,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 18.22222222222222) internal successors, (328), 18 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:58:00,900 INFO L276 IsEmpty]: Start isEmpty. Operand 314818 states and 433602 transitions. [2021-12-07 00:58:00,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-12-07 00:58:00,908 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:58:00,908 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:58:00,930 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20ef957-d96d-4d1a-8e71-49bb82a1fba2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-07 00:58:01,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20ef957-d96d-4d1a-8e71-49bb82a1fba2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:58:01,110 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:58:01,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:58:01,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1016934777, now seen corresponding path program 1 times [2021-12-07 00:58:01,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:58:01,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365459490] [2021-12-07 00:58:01,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:58:01,113 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:58:01,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:58:01,273 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:58:01,273 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:58:01,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365459490] [2021-12-07 00:58:01,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365459490] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:58:01,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697513288] [2021-12-07 00:58:01,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:58:01,274 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:58:01,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20ef957-d96d-4d1a-8e71-49bb82a1fba2/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:58:01,274 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20ef957-d96d-4d1a-8e71-49bb82a1fba2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:58:01,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20ef957-d96d-4d1a-8e71-49bb82a1fba2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-07 00:58:01,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:58:01,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 510 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-07 00:58:01,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:58:01,924 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:58:01,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:58:02,569 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:58:02,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697513288] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:58:02,569 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:58:02,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 9] total 29 [2021-12-07 00:58:02,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77967970] [2021-12-07 00:58:02,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:58:02,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-07 00:58:02,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:58:02,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-07 00:58:02,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=766, Unknown=0, NotChecked=0, Total=870 [2021-12-07 00:58:02,571 INFO L87 Difference]: Start difference. First operand 314818 states and 433602 transitions. Second operand has 30 states, 30 states have (on average 11.0) internal successors, (330), 29 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)