./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.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_48dfc9a7-fd2a-4c96-9fc2-8ee47bd12ba6/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48dfc9a7-fd2a-4c96-9fc2-8ee47bd12ba6/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_48dfc9a7-fd2a-4c96-9fc2-8ee47bd12ba6/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48dfc9a7-fd2a-4c96-9fc2-8ee47bd12ba6/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48dfc9a7-fd2a-4c96-9fc2-8ee47bd12ba6/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_48dfc9a7-fd2a-4c96-9fc2-8ee47bd12ba6/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 76982ccfa15d5420010caf48ff31900a394710bc42d46403e291e5b0b2cbfb5b --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-07 00:54:32,544 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-07 00:54:32,546 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-07 00:54:32,571 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-07 00:54:32,571 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-07 00:54:32,572 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-07 00:54:32,573 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-07 00:54:32,575 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-07 00:54:32,577 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-07 00:54:32,578 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-07 00:54:32,579 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-07 00:54:32,580 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-07 00:54:32,580 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-07 00:54:32,581 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-07 00:54:32,582 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-07 00:54:32,584 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-07 00:54:32,584 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-07 00:54:32,585 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-07 00:54:32,587 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-07 00:54:32,589 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-07 00:54:32,590 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-07 00:54:32,592 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-07 00:54:32,593 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-07 00:54:32,593 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-07 00:54:32,596 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-07 00:54:32,597 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-07 00:54:32,597 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-07 00:54:32,598 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-07 00:54:32,598 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-07 00:54:32,599 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-07 00:54:32,599 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-07 00:54:32,600 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-07 00:54:32,601 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-07 00:54:32,602 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-07 00:54:32,603 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-07 00:54:32,603 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-07 00:54:32,603 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-07 00:54:32,604 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-07 00:54:32,604 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-07 00:54:32,604 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-07 00:54:32,605 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-07 00:54:32,606 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48dfc9a7-fd2a-4c96-9fc2-8ee47bd12ba6/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-07 00:54:32,633 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-07 00:54:32,633 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-07 00:54:32,634 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-07 00:54:32,634 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-07 00:54:32,634 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-07 00:54:32,634 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-07 00:54:32,635 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-07 00:54:32,635 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-07 00:54:32,635 INFO L138 SettingsManager]: * Use SBE=true [2021-12-07 00:54:32,635 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-07 00:54:32,635 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-07 00:54:32,635 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-07 00:54:32,636 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-07 00:54:32,636 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-07 00:54:32,636 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-07 00:54:32,636 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-07 00:54:32,636 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-07 00:54:32,636 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-07 00:54:32,636 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-07 00:54:32,636 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-07 00:54:32,636 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-07 00:54:32,637 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-07 00:54:32,637 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-07 00:54:32,645 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-07 00:54:32,645 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-07 00:54:32,645 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-07 00:54:32,645 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-07 00:54:32,645 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-07 00:54:32,646 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-07 00:54:32,646 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-07 00:54:32,646 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-07 00:54:32,646 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-07 00:54:32,646 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-07 00:54:32,646 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-07 00:54:32,646 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_48dfc9a7-fd2a-4c96-9fc2-8ee47bd12ba6/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48dfc9a7-fd2a-4c96-9fc2-8ee47bd12ba6/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 76982ccfa15d5420010caf48ff31900a394710bc42d46403e291e5b0b2cbfb5b [2021-12-07 00:54:32,822 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-07 00:54:32,836 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-07 00:54:32,838 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-07 00:54:32,839 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-07 00:54:32,840 INFO L275 PluginConnector]: CDTParser initialized [2021-12-07 00:54:32,840 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48dfc9a7-fd2a-4c96-9fc2-8ee47bd12ba6/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c [2021-12-07 00:54:32,882 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48dfc9a7-fd2a-4c96-9fc2-8ee47bd12ba6/bin/uautomizer-DrprNOufMa/data/7d8101506/21c90dee53844352822f099b8a7c470a/FLAG42d0692da [2021-12-07 00:54:33,268 INFO L306 CDTParser]: Found 1 translation units. [2021-12-07 00:54:33,268 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48dfc9a7-fd2a-4c96-9fc2-8ee47bd12ba6/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c [2021-12-07 00:54:33,276 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48dfc9a7-fd2a-4c96-9fc2-8ee47bd12ba6/bin/uautomizer-DrprNOufMa/data/7d8101506/21c90dee53844352822f099b8a7c470a/FLAG42d0692da [2021-12-07 00:54:33,285 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48dfc9a7-fd2a-4c96-9fc2-8ee47bd12ba6/bin/uautomizer-DrprNOufMa/data/7d8101506/21c90dee53844352822f099b8a7c470a [2021-12-07 00:54:33,287 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-07 00:54:33,288 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-07 00:54:33,289 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-07 00:54:33,289 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-07 00:54:33,292 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-07 00:54:33,292 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 12:54:33" (1/1) ... [2021-12-07 00:54:33,293 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b87601 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:54:33, skipping insertion in model container [2021-12-07 00:54:33,293 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 12:54:33" (1/1) ... [2021-12-07 00:54:33,298 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-07 00:54:33,320 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-07 00:54:33,462 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_48dfc9a7-fd2a-4c96-9fc2-8ee47bd12ba6/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c[6803,6816] [2021-12-07 00:54:33,464 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-07 00:54:33,472 INFO L203 MainTranslator]: Completed pre-run [2021-12-07 00:54:33,502 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_48dfc9a7-fd2a-4c96-9fc2-8ee47bd12ba6/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c[6803,6816] [2021-12-07 00:54:33,503 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-07 00:54:33,514 INFO L208 MainTranslator]: Completed translation [2021-12-07 00:54:33,515 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:54:33 WrapperNode [2021-12-07 00:54:33,515 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-07 00:54:33,516 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-07 00:54:33,516 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-07 00:54:33,516 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-07 00:54:33,522 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:54:33" (1/1) ... [2021-12-07 00:54:33,529 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:54:33" (1/1) ... [2021-12-07 00:54:33,553 INFO L137 Inliner]: procedures = 21, calls = 13, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 252 [2021-12-07 00:54:33,553 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-07 00:54:33,553 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-07 00:54:33,554 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-07 00:54:33,554 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-07 00:54:33,560 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:54:33" (1/1) ... [2021-12-07 00:54:33,560 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:54:33" (1/1) ... [2021-12-07 00:54:33,562 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:54:33" (1/1) ... [2021-12-07 00:54:33,562 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:54:33" (1/1) ... [2021-12-07 00:54:33,567 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:54:33" (1/1) ... [2021-12-07 00:54:33,572 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:54:33" (1/1) ... [2021-12-07 00:54:33,573 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:54:33" (1/1) ... [2021-12-07 00:54:33,576 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-07 00:54:33,577 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-07 00:54:33,577 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-07 00:54:33,578 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-07 00:54:33,578 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:54:33" (1/1) ... [2021-12-07 00:54:33,586 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-07 00:54:33,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48dfc9a7-fd2a-4c96-9fc2-8ee47bd12ba6/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:54:33,606 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48dfc9a7-fd2a-4c96-9fc2-8ee47bd12ba6/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-07 00:54:33,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48dfc9a7-fd2a-4c96-9fc2-8ee47bd12ba6/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-07 00:54:33,637 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-07 00:54:33,637 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-07 00:54:33,637 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-07 00:54:33,637 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-07 00:54:33,694 INFO L236 CfgBuilder]: Building ICFG [2021-12-07 00:54:33,695 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-07 00:54:33,927 INFO L277 CfgBuilder]: Performing block encoding [2021-12-07 00:54:33,932 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-07 00:54:33,932 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-07 00:54:33,934 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 12:54:33 BoogieIcfgContainer [2021-12-07 00:54:33,934 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-07 00:54:33,935 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-07 00:54:33,935 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-07 00:54:33,938 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-07 00:54:33,938 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 12:54:33" (1/3) ... [2021-12-07 00:54:33,939 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@606a7440 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 12:54:33, skipping insertion in model container [2021-12-07 00:54:33,939 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:54:33" (2/3) ... [2021-12-07 00:54:33,939 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@606a7440 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 12:54:33, skipping insertion in model container [2021-12-07 00:54:33,939 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 12:54:33" (3/3) ... [2021-12-07 00:54:33,941 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c [2021-12-07 00:54:33,950 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-07 00:54:33,950 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-07 00:54:33,988 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-07 00:54:33,994 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 00:54:33,994 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-07 00:54:34,009 INFO L276 IsEmpty]: Start isEmpty. Operand has 79 states, 77 states have (on average 1.6753246753246753) internal successors, (129), 78 states have internal predecessors, (129), 0 states have call successors, (0), 0 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 00:54:34,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-07 00:54:34,016 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:54:34,016 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] [2021-12-07 00:54:34,017 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:54:34,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:54:34,022 INFO L85 PathProgramCache]: Analyzing trace with hash 233700331, now seen corresponding path program 1 times [2021-12-07 00:54:34,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:54:34,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009875627] [2021-12-07 00:54:34,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:54:34,030 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:54:34,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:54:34,182 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 00:54:34,183 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:54:34,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009875627] [2021-12-07 00:54:34,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009875627] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:54:34,184 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:54:34,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-07 00:54:34,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654512991] [2021-12-07 00:54:34,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:54:34,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-07 00:54:34,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:54:34,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-07 00:54:34,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-07 00:54:34,210 INFO L87 Difference]: Start difference. First operand has 79 states, 77 states have (on average 1.6753246753246753) internal successors, (129), 78 states have internal predecessors, (129), 0 states have call successors, (0), 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 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 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 00:54:34,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:54:34,285 INFO L93 Difference]: Finished difference Result 191 states and 307 transitions. [2021-12-07 00:54:34,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-07 00:54:34,287 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 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 25 [2021-12-07 00:54:34,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:54:34,295 INFO L225 Difference]: With dead ends: 191 [2021-12-07 00:54:34,295 INFO L226 Difference]: Without dead ends: 127 [2021-12-07 00:54:34,297 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 00:54:34,300 INFO L933 BasicCegarLoop]: 122 mSDtfsCounter, 84 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:54:34,301 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 465 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:54:34,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-12-07 00:54:34,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 75. [2021-12-07 00:54:34,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.4189189189189189) internal successors, (105), 74 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 00:54:34,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 105 transitions. [2021-12-07 00:54:34,332 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 105 transitions. Word has length 25 [2021-12-07 00:54:34,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:54:34,332 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 105 transitions. [2021-12-07 00:54:34,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 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 00:54:34,332 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 105 transitions. [2021-12-07 00:54:34,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-07 00:54:34,334 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:54:34,334 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] [2021-12-07 00:54:34,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-07 00:54:34,334 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:54:34,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:54:34,335 INFO L85 PathProgramCache]: Analyzing trace with hash 182027041, now seen corresponding path program 1 times [2021-12-07 00:54:34,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:54:34,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663462623] [2021-12-07 00:54:34,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:54:34,336 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:54:34,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:54:34,406 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 00:54:34,406 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:54:34,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663462623] [2021-12-07 00:54:34,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663462623] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:54:34,407 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:54:34,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 00:54:34,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199026902] [2021-12-07 00:54:34,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:54:34,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 00:54:34,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:54:34,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 00:54:34,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:54:34,409 INFO L87 Difference]: Start difference. First operand 75 states and 105 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 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 00:54:34,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:54:34,428 INFO L93 Difference]: Finished difference Result 167 states and 249 transitions. [2021-12-07 00:54:34,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 00:54:34,428 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 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 41 [2021-12-07 00:54:34,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:54:34,430 INFO L225 Difference]: With dead ends: 167 [2021-12-07 00:54:34,430 INFO L226 Difference]: Without dead ends: 115 [2021-12-07 00:54:34,430 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 00:54:34,431 INFO L933 BasicCegarLoop]: 163 mSDtfsCounter, 70 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 236 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 00:54:34,432 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 236 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:54:34,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-12-07 00:54:34,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 113. [2021-12-07 00:54:34,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.4732142857142858) internal successors, (165), 112 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:54:34,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 165 transitions. [2021-12-07 00:54:34,442 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 165 transitions. Word has length 41 [2021-12-07 00:54:34,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:54:34,442 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 165 transitions. [2021-12-07 00:54:34,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 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 00:54:34,443 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 165 transitions. [2021-12-07 00:54:34,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-07 00:54:34,444 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:54:34,444 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:54:34,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-07 00:54:34,444 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:54:34,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:54:34,445 INFO L85 PathProgramCache]: Analyzing trace with hash 54990345, now seen corresponding path program 1 times [2021-12-07 00:54:34,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:54:34,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323313171] [2021-12-07 00:54:34,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:54:34,445 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:54:34,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:54:34,498 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 00:54:34,499 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:54:34,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323313171] [2021-12-07 00:54:34,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323313171] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:54:34,499 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:54:34,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 00:54:34,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000515677] [2021-12-07 00:54:34,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:54:34,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 00:54:34,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:54:34,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 00:54:34,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:54:34,500 INFO L87 Difference]: Start difference. First operand 113 states and 165 transitions. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:54:34,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:54:34,518 INFO L93 Difference]: Finished difference Result 269 states and 409 transitions. [2021-12-07 00:54:34,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 00:54:34,519 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-12-07 00:54:34,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:54:34,520 INFO L225 Difference]: With dead ends: 269 [2021-12-07 00:54:34,521 INFO L226 Difference]: Without dead ends: 179 [2021-12-07 00:54:34,521 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 00:54:34,522 INFO L933 BasicCegarLoop]: 150 mSDtfsCounter, 65 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 227 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 00:54:34,523 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 227 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:54:34,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-12-07 00:54:34,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 177. [2021-12-07 00:54:34,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 1.5) internal successors, (264), 176 states have internal predecessors, (264), 0 states have call successors, (0), 0 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 00:54:34,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 264 transitions. [2021-12-07 00:54:34,536 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 264 transitions. Word has length 42 [2021-12-07 00:54:34,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:54:34,537 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 264 transitions. [2021-12-07 00:54:34,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:54:34,537 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 264 transitions. [2021-12-07 00:54:34,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-07 00:54:34,538 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:54:34,538 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:54:34,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-07 00:54:34,539 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:54:34,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:54:34,539 INFO L85 PathProgramCache]: Analyzing trace with hash 1508061361, now seen corresponding path program 1 times [2021-12-07 00:54:34,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:54:34,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598176231] [2021-12-07 00:54:34,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:54:34,540 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:54:34,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:54:34,592 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 00:54:34,592 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:54:34,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598176231] [2021-12-07 00:54:34,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598176231] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:54:34,592 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:54:34,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 00:54:34,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088731669] [2021-12-07 00:54:34,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:54:34,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 00:54:34,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:54:34,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 00:54:34,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:54:34,594 INFO L87 Difference]: Start difference. First operand 177 states and 264 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:54:34,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:54:34,612 INFO L93 Difference]: Finished difference Result 437 states and 666 transitions. [2021-12-07 00:54:34,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 00:54:34,612 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-12-07 00:54:34,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:54:34,615 INFO L225 Difference]: With dead ends: 437 [2021-12-07 00:54:34,615 INFO L226 Difference]: Without dead ends: 283 [2021-12-07 00:54:34,616 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 00:54:34,617 INFO L933 BasicCegarLoop]: 137 mSDtfsCounter, 60 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 218 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 00:54:34,617 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 218 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:54:34,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-12-07 00:54:34,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 281. [2021-12-07 00:54:34,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 1.5) internal successors, (420), 280 states have internal predecessors, (420), 0 states have call successors, (0), 0 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 00:54:34,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 420 transitions. [2021-12-07 00:54:34,636 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 420 transitions. Word has length 43 [2021-12-07 00:54:34,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:54:34,636 INFO L470 AbstractCegarLoop]: Abstraction has 281 states and 420 transitions. [2021-12-07 00:54:34,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:54:34,637 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 420 transitions. [2021-12-07 00:54:34,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-07 00:54:34,638 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:54:34,638 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, 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 00:54:34,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-07 00:54:34,638 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:54:34,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:54:34,639 INFO L85 PathProgramCache]: Analyzing trace with hash -922713191, now seen corresponding path program 1 times [2021-12-07 00:54:34,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:54:34,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739088156] [2021-12-07 00:54:34,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:54:34,639 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:54:34,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:54:34,690 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 00:54:34,690 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:54:34,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739088156] [2021-12-07 00:54:34,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739088156] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:54:34,690 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:54:34,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-07 00:54:34,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770411485] [2021-12-07 00:54:34,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:54:34,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-07 00:54:34,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:54:34,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-07 00:54:34,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-07 00:54:34,692 INFO L87 Difference]: Start difference. First operand 281 states and 420 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:54:34,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:54:34,761 INFO L93 Difference]: Finished difference Result 1313 states and 2008 transitions. [2021-12-07 00:54:34,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-07 00:54:34,761 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-12-07 00:54:34,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:54:34,767 INFO L225 Difference]: With dead ends: 1313 [2021-12-07 00:54:34,767 INFO L226 Difference]: Without dead ends: 1055 [2021-12-07 00:54:34,768 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-07 00:54:34,769 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 412 mSDsluCounter, 448 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 412 SdHoareTripleChecker+Valid, 551 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:54:34,770 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [412 Valid, 551 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:54:34,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1055 states. [2021-12-07 00:54:34,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1055 to 537. [2021-12-07 00:54:34,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 537 states, 536 states have (on average 1.492537313432836) internal successors, (800), 536 states have internal predecessors, (800), 0 states have call successors, (0), 0 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 00:54:34,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 800 transitions. [2021-12-07 00:54:34,798 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 800 transitions. Word has length 44 [2021-12-07 00:54:34,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:54:34,799 INFO L470 AbstractCegarLoop]: Abstraction has 537 states and 800 transitions. [2021-12-07 00:54:34,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:54:34,799 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 800 transitions. [2021-12-07 00:54:34,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-07 00:54:34,800 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:54:34,800 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] [2021-12-07 00:54:34,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-07 00:54:34,801 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:54:34,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:54:34,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1077338731, now seen corresponding path program 1 times [2021-12-07 00:54:34,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:54:34,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761097967] [2021-12-07 00:54:34,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:54:34,802 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:54:34,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:54:34,864 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 00:54:34,864 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:54:34,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761097967] [2021-12-07 00:54:34,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761097967] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:54:34,865 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:54:34,865 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-07 00:54:34,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312827175] [2021-12-07 00:54:34,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:54:34,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-07 00:54:34,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:54:34,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-07 00:54:34,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-07 00:54:34,866 INFO L87 Difference]: Start difference. First operand 537 states and 800 transitions. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 0 states have call successors, (0), 0 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 00:54:34,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:54:34,980 INFO L93 Difference]: Finished difference Result 1911 states and 2843 transitions. [2021-12-07 00:54:34,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-07 00:54:34,981 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 0 states have call successors, (0), 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 45 [2021-12-07 00:54:34,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:54:34,988 INFO L225 Difference]: With dead ends: 1911 [2021-12-07 00:54:34,988 INFO L226 Difference]: Without dead ends: 1397 [2021-12-07 00:54:34,989 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-07 00:54:34,990 INFO L933 BasicCegarLoop]: 160 mSDtfsCounter, 209 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:54:34,991 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 294 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:54:34,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1397 states. [2021-12-07 00:54:35,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1397 to 1393. [2021-12-07 00:54:35,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1393 states, 1392 states have (on average 1.471264367816092) internal successors, (2048), 1392 states have internal predecessors, (2048), 0 states have call successors, (0), 0 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 00:54:35,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1393 states to 1393 states and 2048 transitions. [2021-12-07 00:54:35,049 INFO L78 Accepts]: Start accepts. Automaton has 1393 states and 2048 transitions. Word has length 45 [2021-12-07 00:54:35,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:54:35,050 INFO L470 AbstractCegarLoop]: Abstraction has 1393 states and 2048 transitions. [2021-12-07 00:54:35,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 0 states have call successors, (0), 0 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 00:54:35,050 INFO L276 IsEmpty]: Start isEmpty. Operand 1393 states and 2048 transitions. [2021-12-07 00:54:35,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-07 00:54:35,051 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:54:35,051 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] [2021-12-07 00:54:35,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-07 00:54:35,052 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:54:35,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:54:35,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1270898830, now seen corresponding path program 1 times [2021-12-07 00:54:35,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:54:35,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286809655] [2021-12-07 00:54:35,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:54:35,053 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:54:35,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:54:35,145 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 00:54:35,145 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:54:35,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286809655] [2021-12-07 00:54:35,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286809655] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:54:35,146 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:54:35,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-07 00:54:35,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488914769] [2021-12-07 00:54:35,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:54:35,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-07 00:54:35,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:54:35,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-07 00:54:35,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-07 00:54:35,148 INFO L87 Difference]: Start difference. First operand 1393 states and 2048 transitions. Second operand has 8 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 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 00:54:35,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:54:35,355 INFO L93 Difference]: Finished difference Result 2955 states and 4265 transitions. [2021-12-07 00:54:35,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-07 00:54:35,356 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 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 46 [2021-12-07 00:54:35,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:54:35,368 INFO L225 Difference]: With dead ends: 2955 [2021-12-07 00:54:35,368 INFO L226 Difference]: Without dead ends: 2953 [2021-12-07 00:54:35,369 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-12-07 00:54:35,370 INFO L933 BasicCegarLoop]: 143 mSDtfsCounter, 469 mSDsluCounter, 473 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 469 SdHoareTripleChecker+Valid, 616 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:54:35,370 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [469 Valid, 616 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:54:35,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2953 states. [2021-12-07 00:54:35,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2953 to 1537. [2021-12-07 00:54:35,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1537 states, 1536 states have (on average 1.4270833333333333) internal successors, (2192), 1536 states have internal predecessors, (2192), 0 states have call successors, (0), 0 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 00:54:35,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1537 states to 1537 states and 2192 transitions. [2021-12-07 00:54:35,444 INFO L78 Accepts]: Start accepts. Automaton has 1537 states and 2192 transitions. Word has length 46 [2021-12-07 00:54:35,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:54:35,445 INFO L470 AbstractCegarLoop]: Abstraction has 1537 states and 2192 transitions. [2021-12-07 00:54:35,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 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 00:54:35,445 INFO L276 IsEmpty]: Start isEmpty. Operand 1537 states and 2192 transitions. [2021-12-07 00:54:35,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-07 00:54:35,446 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:54:35,446 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] [2021-12-07 00:54:35,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-07 00:54:35,446 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:54:35,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:54:35,447 INFO L85 PathProgramCache]: Analyzing trace with hash 795736558, now seen corresponding path program 1 times [2021-12-07 00:54:35,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:54:35,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485239860] [2021-12-07 00:54:35,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:54:35,447 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:54:35,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:54:35,476 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 00:54:35,476 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:54:35,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485239860] [2021-12-07 00:54:35,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485239860] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:54:35,477 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:54:35,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 00:54:35,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135366012] [2021-12-07 00:54:35,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:54:35,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 00:54:35,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:54:35,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 00:54:35,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:54:35,478 INFO L87 Difference]: Start difference. First operand 1537 states and 2192 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 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 00:54:35,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:54:35,573 INFO L93 Difference]: Finished difference Result 3651 states and 5220 transitions. [2021-12-07 00:54:35,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 00:54:35,574 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 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 47 [2021-12-07 00:54:35,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:54:35,583 INFO L225 Difference]: With dead ends: 3651 [2021-12-07 00:54:35,584 INFO L226 Difference]: Without dead ends: 2137 [2021-12-07 00:54:35,586 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 00:54:35,587 INFO L933 BasicCegarLoop]: 126 mSDtfsCounter, 51 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:54:35,587 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 205 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:54:35,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2137 states. [2021-12-07 00:54:35,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2137 to 2135. [2021-12-07 00:54:35,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2135 states, 2134 states have (on average 1.4198687910028116) internal successors, (3030), 2134 states have internal predecessors, (3030), 0 states have call successors, (0), 0 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 00:54:35,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2135 states to 2135 states and 3030 transitions. [2021-12-07 00:54:35,689 INFO L78 Accepts]: Start accepts. Automaton has 2135 states and 3030 transitions. Word has length 47 [2021-12-07 00:54:35,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:54:35,689 INFO L470 AbstractCegarLoop]: Abstraction has 2135 states and 3030 transitions. [2021-12-07 00:54:35,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 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 00:54:35,690 INFO L276 IsEmpty]: Start isEmpty. Operand 2135 states and 3030 transitions. [2021-12-07 00:54:35,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-07 00:54:35,692 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:54:35,692 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:54:35,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-07 00:54:35,692 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:54:35,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:54:35,693 INFO L85 PathProgramCache]: Analyzing trace with hash -1282796535, now seen corresponding path program 1 times [2021-12-07 00:54:35,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:54:35,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148806318] [2021-12-07 00:54:35,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:54:35,693 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:54:35,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:54:35,771 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-07 00:54:35,771 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:54:35,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148806318] [2021-12-07 00:54:35,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148806318] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:54:35,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165808153] [2021-12-07 00:54:35,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:54:35,771 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:54:35,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48dfc9a7-fd2a-4c96-9fc2-8ee47bd12ba6/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:54:35,772 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48dfc9a7-fd2a-4c96-9fc2-8ee47bd12ba6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:54:35,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48dfc9a7-fd2a-4c96-9fc2-8ee47bd12ba6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-07 00:54:35,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:54:35,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-07 00:54:35,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:54:36,050 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-07 00:54:36,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:54:36,363 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-07 00:54:36,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165808153] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:54:36,363 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:54:36,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 4] total 10 [2021-12-07 00:54:36,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093298216] [2021-12-07 00:54:36,364 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:54:36,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-07 00:54:36,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:54:36,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-07 00:54:36,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-12-07 00:54:36,365 INFO L87 Difference]: Start difference. First operand 2135 states and 3030 transitions. Second operand has 10 states, 10 states have (on average 18.1) internal successors, (181), 10 states have internal predecessors, (181), 0 states have call successors, (0), 0 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 00:54:36,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:54:36,595 INFO L93 Difference]: Finished difference Result 6595 states and 9454 transitions. [2021-12-07 00:54:36,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-07 00:54:36,595 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 18.1) internal successors, (181), 10 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-12-07 00:54:36,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:54:36,615 INFO L225 Difference]: With dead ends: 6595 [2021-12-07 00:54:36,615 INFO L226 Difference]: Without dead ends: 5081 [2021-12-07 00:54:36,618 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-12-07 00:54:36,619 INFO L933 BasicCegarLoop]: 209 mSDtfsCounter, 565 mSDsluCounter, 839 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 565 SdHoareTripleChecker+Valid, 1048 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:54:36,619 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [565 Valid, 1048 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 00:54:36,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5081 states. [2021-12-07 00:54:36,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5081 to 4831. [2021-12-07 00:54:36,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4831 states, 4830 states have (on average 1.4140786749482401) internal successors, (6830), 4830 states have internal predecessors, (6830), 0 states have call successors, (0), 0 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 00:54:36,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4831 states to 4831 states and 6830 transitions. [2021-12-07 00:54:36,797 INFO L78 Accepts]: Start accepts. Automaton has 4831 states and 6830 transitions. Word has length 66 [2021-12-07 00:54:36,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:54:36,798 INFO L470 AbstractCegarLoop]: Abstraction has 4831 states and 6830 transitions. [2021-12-07 00:54:36,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 18.1) internal successors, (181), 10 states have internal predecessors, (181), 0 states have call successors, (0), 0 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 00:54:36,798 INFO L276 IsEmpty]: Start isEmpty. Operand 4831 states and 6830 transitions. [2021-12-07 00:54:36,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-07 00:54:36,799 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:54:36,800 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:54:36,833 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48dfc9a7-fd2a-4c96-9fc2-8ee47bd12ba6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-07 00:54:37,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48dfc9a7-fd2a-4c96-9fc2-8ee47bd12ba6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:54:37,001 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:54:37,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:54:37,001 INFO L85 PathProgramCache]: Analyzing trace with hash 1183086589, now seen corresponding path program 1 times [2021-12-07 00:54:37,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:54:37,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822324121] [2021-12-07 00:54:37,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:54:37,002 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:54:37,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:54:37,053 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:54:37,054 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:54:37,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822324121] [2021-12-07 00:54:37,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822324121] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:54:37,054 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:54:37,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 00:54:37,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125958573] [2021-12-07 00:54:37,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:54:37,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 00:54:37,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:54:37,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 00:54:37,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:54:37,055 INFO L87 Difference]: Start difference. First operand 4831 states and 6830 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 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 00:54:37,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:54:37,262 INFO L93 Difference]: Finished difference Result 11235 states and 15832 transitions. [2021-12-07 00:54:37,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 00:54:37,263 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-12-07 00:54:37,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:54:37,299 INFO L225 Difference]: With dead ends: 11235 [2021-12-07 00:54:37,299 INFO L226 Difference]: Without dead ends: 7825 [2021-12-07 00:54:37,304 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 00:54:37,305 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 49 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:54:37,306 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 199 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:54:37,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7825 states. [2021-12-07 00:54:37,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7825 to 7823. [2021-12-07 00:54:37,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7823 states, 7822 states have (on average 1.3891587829199694) internal successors, (10866), 7822 states have internal predecessors, (10866), 0 states have call successors, (0), 0 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 00:54:37,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7823 states to 7823 states and 10866 transitions. [2021-12-07 00:54:37,615 INFO L78 Accepts]: Start accepts. Automaton has 7823 states and 10866 transitions. Word has length 67 [2021-12-07 00:54:37,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:54:37,615 INFO L470 AbstractCegarLoop]: Abstraction has 7823 states and 10866 transitions. [2021-12-07 00:54:37,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 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 00:54:37,616 INFO L276 IsEmpty]: Start isEmpty. Operand 7823 states and 10866 transitions. [2021-12-07 00:54:37,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-07 00:54:37,618 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:54:37,618 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:54:37,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-07 00:54:37,618 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:54:37,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:54:37,619 INFO L85 PathProgramCache]: Analyzing trace with hash -297371507, now seen corresponding path program 1 times [2021-12-07 00:54:37,619 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:54:37,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062241050] [2021-12-07 00:54:37,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:54:37,619 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:54:37,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:54:37,657 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-07 00:54:37,657 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:54:37,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062241050] [2021-12-07 00:54:37,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062241050] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:54:37,657 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:54:37,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-07 00:54:37,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211822740] [2021-12-07 00:54:37,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:54:37,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-07 00:54:37,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:54:37,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-07 00:54:37,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-07 00:54:37,658 INFO L87 Difference]: Start difference. First operand 7823 states and 10866 transitions. Second operand has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 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 00:54:37,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:54:37,975 INFO L93 Difference]: Finished difference Result 15327 states and 21392 transitions. [2021-12-07 00:54:37,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-07 00:54:37,976 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-12-07 00:54:37,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:54:38,010 INFO L225 Difference]: With dead ends: 15327 [2021-12-07 00:54:38,010 INFO L226 Difference]: Without dead ends: 11957 [2021-12-07 00:54:38,014 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-07 00:54:38,014 INFO L933 BasicCegarLoop]: 182 mSDtfsCounter, 279 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 486 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:54:38,014 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [279 Valid, 486 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:54:38,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11957 states. [2021-12-07 00:54:38,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11957 to 10593. [2021-12-07 00:54:38,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10593 states, 10592 states have (on average 1.3834969788519638) internal successors, (14654), 10592 states have internal predecessors, (14654), 0 states have call successors, (0), 0 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 00:54:38,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10593 states to 10593 states and 14654 transitions. [2021-12-07 00:54:38,357 INFO L78 Accepts]: Start accepts. Automaton has 10593 states and 14654 transitions. Word has length 67 [2021-12-07 00:54:38,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:54:38,357 INFO L470 AbstractCegarLoop]: Abstraction has 10593 states and 14654 transitions. [2021-12-07 00:54:38,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 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 00:54:38,358 INFO L276 IsEmpty]: Start isEmpty. Operand 10593 states and 14654 transitions. [2021-12-07 00:54:38,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-07 00:54:38,360 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:54:38,360 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:54:38,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-07 00:54:38,360 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:54:38,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:54:38,360 INFO L85 PathProgramCache]: Analyzing trace with hash 129974557, now seen corresponding path program 1 times [2021-12-07 00:54:38,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:54:38,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213589530] [2021-12-07 00:54:38,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:54:38,361 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:54:38,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:54:38,386 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:54:38,386 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:54:38,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213589530] [2021-12-07 00:54:38,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213589530] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:54:38,387 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:54:38,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 00:54:38,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652564412] [2021-12-07 00:54:38,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:54:38,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 00:54:38,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:54:38,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 00:54:38,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:54:38,388 INFO L87 Difference]: Start difference. First operand 10593 states and 14654 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 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 00:54:38,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:54:38,717 INFO L93 Difference]: Finished difference Result 18149 states and 24986 transitions. [2021-12-07 00:54:38,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 00:54:38,718 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-12-07 00:54:38,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:54:38,732 INFO L225 Difference]: With dead ends: 18149 [2021-12-07 00:54:38,732 INFO L226 Difference]: Without dead ends: 11113 [2021-12-07 00:54:38,738 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 00:54:38,738 INFO L933 BasicCegarLoop]: 138 mSDtfsCounter, 52 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:54:38,738 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 231 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:54:38,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11113 states. [2021-12-07 00:54:39,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11113 to 10664. [2021-12-07 00:54:39,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10664 states, 10663 states have (on average 1.3522460845915782) internal successors, (14419), 10663 states have internal predecessors, (14419), 0 states have call successors, (0), 0 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 00:54:39,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10664 states to 10664 states and 14419 transitions. [2021-12-07 00:54:39,096 INFO L78 Accepts]: Start accepts. Automaton has 10664 states and 14419 transitions. Word has length 67 [2021-12-07 00:54:39,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:54:39,096 INFO L470 AbstractCegarLoop]: Abstraction has 10664 states and 14419 transitions. [2021-12-07 00:54:39,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 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 00:54:39,097 INFO L276 IsEmpty]: Start isEmpty. Operand 10664 states and 14419 transitions. [2021-12-07 00:54:39,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-07 00:54:39,099 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:54:39,099 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:54:39,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-07 00:54:39,099 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:54:39,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:54:39,100 INFO L85 PathProgramCache]: Analyzing trace with hash 1562240835, now seen corresponding path program 1 times [2021-12-07 00:54:39,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:54:39,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065270044] [2021-12-07 00:54:39,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:54:39,100 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:54:39,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:54:39,135 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-07 00:54:39,135 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:54:39,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065270044] [2021-12-07 00:54:39,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065270044] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:54:39,136 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:54:39,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-07 00:54:39,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724123844] [2021-12-07 00:54:39,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:54:39,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-07 00:54:39,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:54:39,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-07 00:54:39,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-07 00:54:39,137 INFO L87 Difference]: Start difference. First operand 10664 states and 14419 transitions. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:54:39,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:54:39,478 INFO L93 Difference]: Finished difference Result 15411 states and 21048 transitions. [2021-12-07 00:54:39,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-07 00:54:39,479 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-12-07 00:54:39,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:54:39,512 INFO L225 Difference]: With dead ends: 15411 [2021-12-07 00:54:39,512 INFO L226 Difference]: Without dead ends: 13669 [2021-12-07 00:54:39,515 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-07 00:54:39,515 INFO L933 BasicCegarLoop]: 180 mSDtfsCounter, 287 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 471 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:54:39,515 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [287 Valid, 471 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:54:39,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13669 states. [2021-12-07 00:54:39,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13669 to 12284. [2021-12-07 00:54:39,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12284 states, 12283 states have (on average 1.3543108361149556) internal successors, (16635), 12283 states have internal predecessors, (16635), 0 states have call successors, (0), 0 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 00:54:39,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12284 states to 12284 states and 16635 transitions. [2021-12-07 00:54:39,918 INFO L78 Accepts]: Start accepts. Automaton has 12284 states and 16635 transitions. Word has length 67 [2021-12-07 00:54:39,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:54:39,918 INFO L470 AbstractCegarLoop]: Abstraction has 12284 states and 16635 transitions. [2021-12-07 00:54:39,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:54:39,919 INFO L276 IsEmpty]: Start isEmpty. Operand 12284 states and 16635 transitions. [2021-12-07 00:54:39,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-07 00:54:39,921 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:54:39,921 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:54:39,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-07 00:54:39,921 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:54:39,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:54:39,922 INFO L85 PathProgramCache]: Analyzing trace with hash -2062316443, now seen corresponding path program 1 times [2021-12-07 00:54:39,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:54:39,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494958165] [2021-12-07 00:54:39,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:54:39,922 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:54:39,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:54:39,962 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-07 00:54:39,962 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:54:39,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494958165] [2021-12-07 00:54:39,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494958165] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:54:39,962 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:54:39,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-07 00:54:39,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739577227] [2021-12-07 00:54:39,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:54:39,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-07 00:54:39,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:54:39,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-07 00:54:39,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-07 00:54:39,964 INFO L87 Difference]: Start difference. First operand 12284 states and 16635 transitions. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 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 00:54:40,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:54:40,454 INFO L93 Difference]: Finished difference Result 19196 states and 26179 transitions. [2021-12-07 00:54:40,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-07 00:54:40,455 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-12-07 00:54:40,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:54:40,472 INFO L225 Difference]: With dead ends: 19196 [2021-12-07 00:54:40,472 INFO L226 Difference]: Without dead ends: 16092 [2021-12-07 00:54:40,478 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-07 00:54:40,478 INFO L933 BasicCegarLoop]: 185 mSDtfsCounter, 280 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 513 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:54:40,478 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [280 Valid, 513 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:54:40,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16092 states. [2021-12-07 00:54:40,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16092 to 14696. [2021-12-07 00:54:40,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14696 states, 14695 states have (on average 1.350187138482477) internal successors, (19841), 14695 states have internal predecessors, (19841), 0 states have call successors, (0), 0 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 00:54:40,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14696 states to 14696 states and 19841 transitions. [2021-12-07 00:54:40,942 INFO L78 Accepts]: Start accepts. Automaton has 14696 states and 19841 transitions. Word has length 67 [2021-12-07 00:54:40,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:54:40,942 INFO L470 AbstractCegarLoop]: Abstraction has 14696 states and 19841 transitions. [2021-12-07 00:54:40,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 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 00:54:40,943 INFO L276 IsEmpty]: Start isEmpty. Operand 14696 states and 19841 transitions. [2021-12-07 00:54:40,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-07 00:54:40,945 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:54:40,945 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:54:40,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-07 00:54:40,946 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:54:40,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:54:40,946 INFO L85 PathProgramCache]: Analyzing trace with hash -762122981, now seen corresponding path program 1 times [2021-12-07 00:54:40,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:54:40,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343875821] [2021-12-07 00:54:40,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:54:40,946 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:54:40,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:54:40,971 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:54:40,972 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:54:40,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343875821] [2021-12-07 00:54:40,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343875821] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:54:40,972 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:54:40,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 00:54:40,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401672718] [2021-12-07 00:54:40,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:54:40,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 00:54:40,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:54:40,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 00:54:40,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:54:40,973 INFO L87 Difference]: Start difference. First operand 14696 states and 19841 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 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 00:54:41,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:54:41,628 INFO L93 Difference]: Finished difference Result 35614 states and 47892 transitions. [2021-12-07 00:54:41,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 00:54:41,629 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 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 70 [2021-12-07 00:54:41,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:54:41,649 INFO L225 Difference]: With dead ends: 35614 [2021-12-07 00:54:41,649 INFO L226 Difference]: Without dead ends: 21860 [2021-12-07 00:54:41,661 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 00:54:41,662 INFO L933 BasicCegarLoop]: 153 mSDtfsCounter, 50 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:54:41,662 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 246 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:54:41,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21860 states. [2021-12-07 00:54:42,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21860 to 21198. [2021-12-07 00:54:42,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21198 states, 21197 states have (on average 1.3274519979242345) internal successors, (28138), 21197 states have internal predecessors, (28138), 0 states have call successors, (0), 0 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 00:54:42,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21198 states to 21198 states and 28138 transitions. [2021-12-07 00:54:42,453 INFO L78 Accepts]: Start accepts. Automaton has 21198 states and 28138 transitions. Word has length 70 [2021-12-07 00:54:42,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:54:42,453 INFO L470 AbstractCegarLoop]: Abstraction has 21198 states and 28138 transitions. [2021-12-07 00:54:42,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 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 00:54:42,454 INFO L276 IsEmpty]: Start isEmpty. Operand 21198 states and 28138 transitions. [2021-12-07 00:54:42,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-07 00:54:42,456 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:54:42,457 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:54:42,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-07 00:54:42,457 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:54:42,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:54:42,457 INFO L85 PathProgramCache]: Analyzing trace with hash -624325544, now seen corresponding path program 1 times [2021-12-07 00:54:42,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:54:42,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182732800] [2021-12-07 00:54:42,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:54:42,458 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:54:42,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:54:42,501 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:54:42,501 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:54:42,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182732800] [2021-12-07 00:54:42,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182732800] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:54:42,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926169615] [2021-12-07 00:54:42,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:54:42,501 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:54:42,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48dfc9a7-fd2a-4c96-9fc2-8ee47bd12ba6/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:54:42,502 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48dfc9a7-fd2a-4c96-9fc2-8ee47bd12ba6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:54:42,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48dfc9a7-fd2a-4c96-9fc2-8ee47bd12ba6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-07 00:54:42,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:54:42,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-07 00:54:42,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:54:42,746 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:54:42,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:54:42,845 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:54:42,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926169615] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:54:42,846 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:54:42,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2021-12-07 00:54:42,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600711722] [2021-12-07 00:54:42,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:54:42,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-07 00:54:42,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:54:42,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-07 00:54:42,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-12-07 00:54:42,848 INFO L87 Difference]: Start difference. First operand 21198 states and 28138 transitions. Second operand has 11 states, 11 states have (on average 10.909090909090908) internal successors, (120), 10 states have internal predecessors, (120), 0 states have call successors, (0), 0 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 00:54:44,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:54:44,531 INFO L93 Difference]: Finished difference Result 64966 states and 86142 transitions. [2021-12-07 00:54:44,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-07 00:54:44,531 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 10.909090909090908) internal successors, (120), 10 states have internal predecessors, (120), 0 states have call successors, (0), 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 71 [2021-12-07 00:54:44,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:54:44,578 INFO L225 Difference]: With dead ends: 64966 [2021-12-07 00:54:44,578 INFO L226 Difference]: Without dead ends: 47852 [2021-12-07 00:54:44,596 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 136 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2021-12-07 00:54:44,596 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 1719 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1719 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:54:44,597 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1719 Valid, 387 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 00:54:44,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47852 states. [2021-12-07 00:54:45,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47852 to 24863. [2021-12-07 00:54:45,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24863 states, 24862 states have (on average 1.3303837181240448) internal successors, (33076), 24862 states have internal predecessors, (33076), 0 states have call successors, (0), 0 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 00:54:45,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24863 states to 24863 states and 33076 transitions. [2021-12-07 00:54:45,745 INFO L78 Accepts]: Start accepts. Automaton has 24863 states and 33076 transitions. Word has length 71 [2021-12-07 00:54:45,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:54:45,746 INFO L470 AbstractCegarLoop]: Abstraction has 24863 states and 33076 transitions. [2021-12-07 00:54:45,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.909090909090908) internal successors, (120), 10 states have internal predecessors, (120), 0 states have call successors, (0), 0 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 00:54:45,746 INFO L276 IsEmpty]: Start isEmpty. Operand 24863 states and 33076 transitions. [2021-12-07 00:54:45,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-07 00:54:45,750 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:54:45,750 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:54:45,776 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48dfc9a7-fd2a-4c96-9fc2-8ee47bd12ba6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-07 00:54:45,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48dfc9a7-fd2a-4c96-9fc2-8ee47bd12ba6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-07 00:54:45,952 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:54:45,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:54:45,954 INFO L85 PathProgramCache]: Analyzing trace with hash -2058940762, now seen corresponding path program 1 times [2021-12-07 00:54:45,954 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:54:45,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741284436] [2021-12-07 00:54:45,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:54:45,955 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:54:45,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:54:46,009 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-07 00:54:46,010 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:54:46,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741284436] [2021-12-07 00:54:46,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741284436] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:54:46,010 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:54:46,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-07 00:54:46,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713261293] [2021-12-07 00:54:46,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:54:46,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-07 00:54:46,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:54:46,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-07 00:54:46,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-07 00:54:46,011 INFO L87 Difference]: Start difference. First operand 24863 states and 33076 transitions. Second operand has 6 states, 6 states have (on average 11.0) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 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 00:54:47,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:54:47,537 INFO L93 Difference]: Finished difference Result 61430 states and 81709 transitions. [2021-12-07 00:54:47,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-07 00:54:47,537 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 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 71 [2021-12-07 00:54:47,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:54:47,573 INFO L225 Difference]: With dead ends: 61430 [2021-12-07 00:54:47,573 INFO L226 Difference]: Without dead ends: 36606 [2021-12-07 00:54:47,590 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 00:54:47,591 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 592 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 592 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:54:47,591 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [592 Valid, 167 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 00:54:47,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36606 states. [2021-12-07 00:54:48,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36606 to 33398. [2021-12-07 00:54:48,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33398 states, 33397 states have (on average 1.3117046441297122) internal successors, (43807), 33397 states have internal predecessors, (43807), 0 states have call successors, (0), 0 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 00:54:48,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33398 states to 33398 states and 43807 transitions. [2021-12-07 00:54:48,936 INFO L78 Accepts]: Start accepts. Automaton has 33398 states and 43807 transitions. Word has length 71 [2021-12-07 00:54:48,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:54:48,936 INFO L470 AbstractCegarLoop]: Abstraction has 33398 states and 43807 transitions. [2021-12-07 00:54:48,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 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 00:54:48,937 INFO L276 IsEmpty]: Start isEmpty. Operand 33398 states and 43807 transitions. [2021-12-07 00:54:48,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-07 00:54:48,940 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:54:48,940 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:54:48,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-07 00:54:48,941 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:54:48,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:54:48,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1342540196, now seen corresponding path program 1 times [2021-12-07 00:54:48,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:54:48,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047888458] [2021-12-07 00:54:48,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:54:48,941 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:54:48,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:54:48,986 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:54:48,986 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:54:48,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047888458] [2021-12-07 00:54:48,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047888458] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:54:48,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001790279] [2021-12-07 00:54:48,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:54:48,986 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:54:48,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48dfc9a7-fd2a-4c96-9fc2-8ee47bd12ba6/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:54:48,987 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48dfc9a7-fd2a-4c96-9fc2-8ee47bd12ba6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:54:48,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48dfc9a7-fd2a-4c96-9fc2-8ee47bd12ba6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-07 00:54:49,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:54:49,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-07 00:54:49,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:54:49,196 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:54:49,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:54:49,272 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:54:49,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001790279] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:54:49,272 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:54:49,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2021-12-07 00:54:49,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494429466] [2021-12-07 00:54:49,273 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:54:49,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-07 00:54:49,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:54:49,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-07 00:54:49,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-12-07 00:54:49,274 INFO L87 Difference]: Start difference. First operand 33398 states and 43807 transitions. Second operand has 11 states, 11 states have (on average 10.909090909090908) internal successors, (120), 10 states have internal predecessors, (120), 0 states have call successors, (0), 0 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 00:54:51,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:54:51,154 INFO L93 Difference]: Finished difference Result 72462 states and 94424 transitions. [2021-12-07 00:54:51,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-07 00:54:51,155 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 10.909090909090908) internal successors, (120), 10 states have internal predecessors, (120), 0 states have call successors, (0), 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 71 [2021-12-07 00:54:51,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:54:51,200 INFO L225 Difference]: With dead ends: 72462 [2021-12-07 00:54:51,200 INFO L226 Difference]: Without dead ends: 45957 [2021-12-07 00:54:51,220 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 136 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2021-12-07 00:54:51,221 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 1427 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1427 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:54:51,221 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1427 Valid, 281 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 00:54:51,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45957 states. [2021-12-07 00:54:53,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45957 to 33893. [2021-12-07 00:54:53,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33893 states, 33892 states have (on average 1.3054113065030095) internal successors, (44243), 33892 states have internal predecessors, (44243), 0 states have call successors, (0), 0 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 00:54:53,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33893 states to 33893 states and 44243 transitions. [2021-12-07 00:54:53,149 INFO L78 Accepts]: Start accepts. Automaton has 33893 states and 44243 transitions. Word has length 71 [2021-12-07 00:54:53,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:54:53,149 INFO L470 AbstractCegarLoop]: Abstraction has 33893 states and 44243 transitions. [2021-12-07 00:54:53,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.909090909090908) internal successors, (120), 10 states have internal predecessors, (120), 0 states have call successors, (0), 0 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 00:54:53,150 INFO L276 IsEmpty]: Start isEmpty. Operand 33893 states and 44243 transitions. [2021-12-07 00:54:53,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-07 00:54:53,154 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:54:53,154 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:54:53,175 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48dfc9a7-fd2a-4c96-9fc2-8ee47bd12ba6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-07 00:54:53,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48dfc9a7-fd2a-4c96-9fc2-8ee47bd12ba6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-07 00:54:53,356 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:54:53,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:54:53,357 INFO L85 PathProgramCache]: Analyzing trace with hash -85511602, now seen corresponding path program 1 times [2021-12-07 00:54:53,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:54:53,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273846011] [2021-12-07 00:54:53,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:54:53,359 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:54:53,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:54:53,431 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:54:53,432 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:54:53,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273846011] [2021-12-07 00:54:53,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273846011] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:54:53,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693762133] [2021-12-07 00:54:53,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:54:53,432 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:54:53,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48dfc9a7-fd2a-4c96-9fc2-8ee47bd12ba6/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:54:53,433 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48dfc9a7-fd2a-4c96-9fc2-8ee47bd12ba6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:54:53,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48dfc9a7-fd2a-4c96-9fc2-8ee47bd12ba6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-07 00:54:53,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:54:53,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-07 00:54:53,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:54:53,652 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:54:53,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:54:53,728 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:54:53,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693762133] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:54:53,728 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:54:53,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2021-12-07 00:54:53,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714517624] [2021-12-07 00:54:53,728 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:54:53,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-07 00:54:53,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:54:53,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-07 00:54:53,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-12-07 00:54:53,729 INFO L87 Difference]: Start difference. First operand 33893 states and 44243 transitions. Second operand has 11 states, 11 states have (on average 11.181818181818182) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 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 00:54:56,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:54:56,744 INFO L93 Difference]: Finished difference Result 89058 states and 116006 transitions. [2021-12-07 00:54:56,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-07 00:54:56,744 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 11.181818181818182) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 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 71 [2021-12-07 00:54:56,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:54:56,813 INFO L225 Difference]: With dead ends: 89058 [2021-12-07 00:54:56,813 INFO L226 Difference]: Without dead ends: 66760 [2021-12-07 00:54:56,830 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 136 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2021-12-07 00:54:56,831 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 749 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 749 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:54:56,831 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [749 Valid, 380 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 00:54:56,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66760 states. [2021-12-07 00:54:58,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66760 to 39289. [2021-12-07 00:54:58,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39289 states, 39288 states have (on average 1.3065058032987171) internal successors, (51330), 39288 states have internal predecessors, (51330), 0 states have call successors, (0), 0 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 00:54:58,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39289 states to 39289 states and 51330 transitions. [2021-12-07 00:54:58,870 INFO L78 Accepts]: Start accepts. Automaton has 39289 states and 51330 transitions. Word has length 71 [2021-12-07 00:54:58,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:54:58,870 INFO L470 AbstractCegarLoop]: Abstraction has 39289 states and 51330 transitions. [2021-12-07 00:54:58,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.181818181818182) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 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 00:54:58,870 INFO L276 IsEmpty]: Start isEmpty. Operand 39289 states and 51330 transitions. [2021-12-07 00:54:58,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-07 00:54:58,874 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:54:58,874 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:54:58,895 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48dfc9a7-fd2a-4c96-9fc2-8ee47bd12ba6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-07 00:54:59,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48dfc9a7-fd2a-4c96-9fc2-8ee47bd12ba6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:54:59,076 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:54:59,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:54:59,078 INFO L85 PathProgramCache]: Analyzing trace with hash 2029316117, now seen corresponding path program 1 times [2021-12-07 00:54:59,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:54:59,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452472562] [2021-12-07 00:54:59,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:54:59,080 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:54:59,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:54:59,229 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:54:59,229 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:54:59,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452472562] [2021-12-07 00:54:59,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452472562] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:54:59,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845060735] [2021-12-07 00:54:59,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:54:59,230 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:54:59,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48dfc9a7-fd2a-4c96-9fc2-8ee47bd12ba6/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:54:59,230 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48dfc9a7-fd2a-4c96-9fc2-8ee47bd12ba6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:54:59,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48dfc9a7-fd2a-4c96-9fc2-8ee47bd12ba6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-07 00:54:59,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:54:59,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-07 00:54:59,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:55:00,200 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:55:00,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:55:00,802 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:55:00,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845060735] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:55:00,803 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:55:00,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 13] total 32 [2021-12-07 00:55:00,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403442601] [2021-12-07 00:55:00,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:55:00,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-07 00:55:00,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:55:00,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-07 00:55:00,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=892, Unknown=0, NotChecked=0, Total=992 [2021-12-07 00:55:00,804 INFO L87 Difference]: Start difference. First operand 39289 states and 51330 transitions. Second operand has 32 states, 32 states have (on average 6.15625) internal successors, (197), 32 states have internal predecessors, (197), 0 states have call successors, (0), 0 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 00:56:14,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:56:14,505 INFO L93 Difference]: Finished difference Result 526236 states and 672310 transitions. [2021-12-07 00:56:14,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 523 states. [2021-12-07 00:56:14,506 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 6.15625) internal successors, (197), 32 states have internal predecessors, (197), 0 states have call successors, (0), 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 72 [2021-12-07 00:56:14,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:56:15,237 INFO L225 Difference]: With dead ends: 526236 [2021-12-07 00:56:15,237 INFO L226 Difference]: Without dead ends: 486651 [2021-12-07 00:56:15,362 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 673 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 551 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161395 ImplicationChecksByTransitivity, 35.5s TimeCoverageRelationStatistics Valid=45272, Invalid=259984, Unknown=0, NotChecked=0, Total=305256 [2021-12-07 00:56:15,362 INFO L933 BasicCegarLoop]: 580 mSDtfsCounter, 16614 mSDsluCounter, 6916 mSDsCounter, 0 mSdLazyCounter, 7237 mSolverCounterSat, 1344 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16614 SdHoareTripleChecker+Valid, 7496 SdHoareTripleChecker+Invalid, 8581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1344 IncrementalHoareTripleChecker+Valid, 7237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:56:15,362 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16614 Valid, 7496 Invalid, 8581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1344 Valid, 7237 Invalid, 0 Unknown, 0 Unchecked, 7.1s Time] [2021-12-07 00:56:15,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486651 states. [2021-12-07 00:56:25,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486651 to 104759. [2021-12-07 00:56:25,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104759 states, 104758 states have (on average 1.3025162756066362) internal successors, (136449), 104758 states have internal predecessors, (136449), 0 states have call successors, (0), 0 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 00:56:25,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104759 states to 104759 states and 136449 transitions. [2021-12-07 00:56:25,486 INFO L78 Accepts]: Start accepts. Automaton has 104759 states and 136449 transitions. Word has length 72 [2021-12-07 00:56:25,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:56:25,486 INFO L470 AbstractCegarLoop]: Abstraction has 104759 states and 136449 transitions. [2021-12-07 00:56:25,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 6.15625) internal successors, (197), 32 states have internal predecessors, (197), 0 states have call successors, (0), 0 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 00:56:25,486 INFO L276 IsEmpty]: Start isEmpty. Operand 104759 states and 136449 transitions. [2021-12-07 00:56:25,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-07 00:56:25,491 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:56:25,491 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:56:25,515 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48dfc9a7-fd2a-4c96-9fc2-8ee47bd12ba6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-07 00:56:25,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48dfc9a7-fd2a-4c96-9fc2-8ee47bd12ba6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:56:25,693 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:56:25,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:56:25,784 INFO L85 PathProgramCache]: Analyzing trace with hash -894041155, now seen corresponding path program 1 times [2021-12-07 00:56:25,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:56:25,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508803755] [2021-12-07 00:56:25,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:56:25,784 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:56:25,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:25,811 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:56:25,811 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:56:25,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508803755] [2021-12-07 00:56:25,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508803755] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:56:25,812 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:56:25,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 00:56:25,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924144051] [2021-12-07 00:56:25,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:56:25,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 00:56:25,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:56:25,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 00:56:25,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:56:25,813 INFO L87 Difference]: Start difference. First operand 104759 states and 136449 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 00:56:32,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:56:32,456 INFO L93 Difference]: Finished difference Result 135656 states and 176180 transitions. [2021-12-07 00:56:32,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 00:56:32,457 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 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 73 [2021-12-07 00:56:32,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:56:32,571 INFO L225 Difference]: With dead ends: 135656 [2021-12-07 00:56:32,571 INFO L226 Difference]: Without dead ends: 99136 [2021-12-07 00:56:32,592 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 00:56:32,593 INFO L933 BasicCegarLoop]: 129 mSDtfsCounter, 48 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:56:32,593 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 219 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:56:32,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99136 states. [2021-12-07 00:56:39,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99136 to 99134. [2021-12-07 00:56:39,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99134 states, 99133 states have (on average 1.2810567621276467) internal successors, (126995), 99133 states have internal predecessors, (126995), 0 states have call successors, (0), 0 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 00:56:39,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99134 states to 99134 states and 126995 transitions. [2021-12-07 00:56:39,716 INFO L78 Accepts]: Start accepts. Automaton has 99134 states and 126995 transitions. Word has length 73 [2021-12-07 00:56:39,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:56:39,717 INFO L470 AbstractCegarLoop]: Abstraction has 99134 states and 126995 transitions. [2021-12-07 00:56:39,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 00:56:39,717 INFO L276 IsEmpty]: Start isEmpty. Operand 99134 states and 126995 transitions. [2021-12-07 00:56:39,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-07 00:56:39,722 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:56:39,722 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] [2021-12-07 00:56:39,722 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-07 00:56:39,723 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:56:39,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:56:39,723 INFO L85 PathProgramCache]: Analyzing trace with hash -522202310, now seen corresponding path program 1 times [2021-12-07 00:56:39,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:56:39,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711452972] [2021-12-07 00:56:39,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:56:39,723 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:56:39,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:39,750 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:56:39,750 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:56:39,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711452972] [2021-12-07 00:56:39,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711452972] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:56:39,750 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:56:39,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 00:56:39,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961973104] [2021-12-07 00:56:39,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:56:39,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 00:56:39,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:56:39,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 00:56:39,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:56:39,752 INFO L87 Difference]: Start difference. First operand 99134 states and 126995 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 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 00:56:46,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:56:46,380 INFO L93 Difference]: Finished difference Result 190221 states and 242582 transitions. [2021-12-07 00:56:46,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 00:56:46,380 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 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 74 [2021-12-07 00:56:46,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:56:46,480 INFO L225 Difference]: With dead ends: 190221 [2021-12-07 00:56:46,480 INFO L226 Difference]: Without dead ends: 91157 [2021-12-07 00:56:46,516 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 00:56:46,517 INFO L933 BasicCegarLoop]: 130 mSDtfsCounter, 45 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 219 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 00:56:46,517 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 219 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:56:46,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91157 states. [2021-12-07 00:56:53,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91157 to 90270. [2021-12-07 00:56:53,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90270 states, 90269 states have (on average 1.2421429283585728) internal successors, (112127), 90269 states have internal predecessors, (112127), 0 states have call successors, (0), 0 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 00:56:53,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90270 states to 90270 states and 112127 transitions. [2021-12-07 00:56:53,199 INFO L78 Accepts]: Start accepts. Automaton has 90270 states and 112127 transitions. Word has length 74 [2021-12-07 00:56:53,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:56:53,199 INFO L470 AbstractCegarLoop]: Abstraction has 90270 states and 112127 transitions. [2021-12-07 00:56:53,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 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 00:56:53,199 INFO L276 IsEmpty]: Start isEmpty. Operand 90270 states and 112127 transitions. [2021-12-07 00:56:53,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-07 00:56:53,202 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:56:53,202 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:56:53,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-07 00:56:53,203 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:56:53,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:56:53,203 INFO L85 PathProgramCache]: Analyzing trace with hash -1583905515, now seen corresponding path program 1 times [2021-12-07 00:56:53,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:56:53,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597753206] [2021-12-07 00:56:53,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:56:53,203 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:56:53,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:53,579 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:56:53,579 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:56:53,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597753206] [2021-12-07 00:56:53,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597753206] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:56:53,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377395989] [2021-12-07 00:56:53,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:56:53,580 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:56:53,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48dfc9a7-fd2a-4c96-9fc2-8ee47bd12ba6/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:56:53,580 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48dfc9a7-fd2a-4c96-9fc2-8ee47bd12ba6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:56:53,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48dfc9a7-fd2a-4c96-9fc2-8ee47bd12ba6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-07 00:56:53,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:56:53,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-07 00:56:53,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:56:54,302 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:56:54,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:56:55,076 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:56:55,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377395989] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:56:55,076 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:56:55,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 12, 12] total 43 [2021-12-07 00:56:55,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015855633] [2021-12-07 00:56:55,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:56:55,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-12-07 00:56:55,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:56:55,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-12-07 00:56:55,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1657, Unknown=0, NotChecked=0, Total=1806 [2021-12-07 00:56:55,077 INFO L87 Difference]: Start difference. First operand 90270 states and 112127 transitions. Second operand has 43 states, 43 states have (on average 4.488372093023256) internal successors, (193), 43 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:57:35,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:57:35,685 INFO L93 Difference]: Finished difference Result 434111 states and 532264 transitions. [2021-12-07 00:57:35,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2021-12-07 00:57:35,685 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 4.488372093023256) internal successors, (193), 43 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-12-07 00:57:35,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:57:36,184 INFO L225 Difference]: With dead ends: 434111 [2021-12-07 00:57:36,184 INFO L226 Difference]: Without dead ends: 375403 [2021-12-07 00:57:36,258 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7477 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=4311, Invalid=19869, Unknown=0, NotChecked=0, Total=24180 [2021-12-07 00:57:36,258 INFO L933 BasicCegarLoop]: 342 mSDtfsCounter, 5076 mSDsluCounter, 6875 mSDsCounter, 0 mSdLazyCounter, 3964 mSolverCounterSat, 229 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5076 SdHoareTripleChecker+Valid, 7217 SdHoareTripleChecker+Invalid, 4193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 229 IncrementalHoareTripleChecker+Valid, 3964 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-07 00:57:36,259 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5076 Valid, 7217 Invalid, 4193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [229 Valid, 3964 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-07 00:57:36,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375403 states. [2021-12-07 00:57:48,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375403 to 117462. [2021-12-07 00:57:48,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117462 states, 117461 states have (on average 1.239790228245971) internal successors, (145627), 117461 states have internal predecessors, (145627), 0 states have call successors, (0), 0 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 00:57:48,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117462 states to 117462 states and 145627 transitions. [2021-12-07 00:57:48,271 INFO L78 Accepts]: Start accepts. Automaton has 117462 states and 145627 transitions. Word has length 74 [2021-12-07 00:57:48,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:57:48,272 INFO L470 AbstractCegarLoop]: Abstraction has 117462 states and 145627 transitions. [2021-12-07 00:57:48,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 4.488372093023256) internal successors, (193), 43 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:57:48,272 INFO L276 IsEmpty]: Start isEmpty. Operand 117462 states and 145627 transitions. [2021-12-07 00:57:48,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-07 00:57:48,275 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:57:48,275 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:57:48,298 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48dfc9a7-fd2a-4c96-9fc2-8ee47bd12ba6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-07 00:57:48,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48dfc9a7-fd2a-4c96-9fc2-8ee47bd12ba6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-12-07 00:57:48,477 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:57:48,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:57:48,479 INFO L85 PathProgramCache]: Analyzing trace with hash -1978272301, now seen corresponding path program 1 times [2021-12-07 00:57:48,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:57:48,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929615968] [2021-12-07 00:57:48,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:57:48,480 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:57:48,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:48,531 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-07 00:57:48,531 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:57:48,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929615968] [2021-12-07 00:57:48,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929615968] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:57:48,531 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:57:48,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-07 00:57:48,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151574338] [2021-12-07 00:57:48,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:57:48,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-07 00:57:48,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:57:48,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-07 00:57:48,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-07 00:57:48,532 INFO L87 Difference]: Start difference. First operand 117462 states and 145627 transitions. Second operand has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 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 00:57:58,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:57:58,463 INFO L93 Difference]: Finished difference Result 179529 states and 222299 transitions. [2021-12-07 00:57:58,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-07 00:57:58,464 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 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 74 [2021-12-07 00:57:58,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:57:58,598 INFO L225 Difference]: With dead ends: 179529 [2021-12-07 00:57:58,598 INFO L226 Difference]: Without dead ends: 110009 [2021-12-07 00:57:58,631 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 00:57:58,631 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 389 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 389 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:57:58,632 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [389 Valid, 203 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 00:57:58,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110009 states. [2021-12-07 00:58:08,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110009 to 108585. [2021-12-07 00:58:08,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108585 states, 108584 states have (on average 1.2270500257864878) internal successors, (133238), 108584 states have internal predecessors, (133238), 0 states have call successors, (0), 0 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 00:58:08,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108585 states to 108585 states and 133238 transitions. [2021-12-07 00:58:08,677 INFO L78 Accepts]: Start accepts. Automaton has 108585 states and 133238 transitions. Word has length 74 [2021-12-07 00:58:08,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:58:08,677 INFO L470 AbstractCegarLoop]: Abstraction has 108585 states and 133238 transitions. [2021-12-07 00:58:08,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 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 00:58:08,677 INFO L276 IsEmpty]: Start isEmpty. Operand 108585 states and 133238 transitions. [2021-12-07 00:58:08,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-12-07 00:58:08,695 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:58:08,695 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:58:08,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-07 00:58:08,696 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:58:08,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:58:08,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1460573289, now seen corresponding path program 1 times [2021-12-07 00:58:08,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:58:08,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578569319] [2021-12-07 00:58:08,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:58:08,697 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:58:08,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:58:08,732 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-07 00:58:08,733 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:58:08,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578569319] [2021-12-07 00:58:08,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578569319] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:58:08,733 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:58:08,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-07 00:58:08,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027063575] [2021-12-07 00:58:08,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:58:08,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 00:58:08,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:58:08,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 00:58:08,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-07 00:58:08,734 INFO L87 Difference]: Start difference. First operand 108585 states and 133238 transitions. Second operand has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 0 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 00:58:25,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:58:25,296 INFO L93 Difference]: Finished difference Result 291557 states and 357920 transitions. [2021-12-07 00:58:25,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-07 00:58:25,297 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 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 117 [2021-12-07 00:58:25,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:58:25,522 INFO L225 Difference]: With dead ends: 291557 [2021-12-07 00:58:25,522 INFO L226 Difference]: Without dead ends: 185570 [2021-12-07 00:58:25,572 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-07 00:58:25,573 INFO L933 BasicCegarLoop]: 131 mSDtfsCounter, 73 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:58:25,573 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 282 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:58:25,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185570 states. [2021-12-07 00:58:42,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185570 to 180576. [2021-12-07 00:58:42,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180576 states, 180575 states have (on average 1.2216087498269417) internal successors, (220592), 180575 states have internal predecessors, (220592), 0 states have call successors, (0), 0 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 00:58:42,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180576 states to 180576 states and 220592 transitions. [2021-12-07 00:58:42,833 INFO L78 Accepts]: Start accepts. Automaton has 180576 states and 220592 transitions. Word has length 117 [2021-12-07 00:58:42,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:58:42,833 INFO L470 AbstractCegarLoop]: Abstraction has 180576 states and 220592 transitions. [2021-12-07 00:58:42,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 0 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 00:58:42,833 INFO L276 IsEmpty]: Start isEmpty. Operand 180576 states and 220592 transitions. [2021-12-07 00:58:42,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-12-07 00:58:42,859 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:58:42,859 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:58:42,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-07 00:58:42,860 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:58:42,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:58:42,860 INFO L85 PathProgramCache]: Analyzing trace with hash -498001497, now seen corresponding path program 1 times [2021-12-07 00:58:42,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:58:42,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633195700] [2021-12-07 00:58:42,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:58:42,860 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:58:42,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:58:42,900 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-12-07 00:58:42,900 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:58:42,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633195700] [2021-12-07 00:58:42,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633195700] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:58:42,900 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:58:42,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-07 00:58:42,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536311040] [2021-12-07 00:58:42,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:58:42,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-07 00:58:42,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:58:42,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-07 00:58:42,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-07 00:58:42,901 INFO L87 Difference]: Start difference. First operand 180576 states and 220592 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 00:59:00,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:59:00,078 INFO L93 Difference]: Finished difference Result 342419 states and 416832 transitions. [2021-12-07 00:59:00,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-07 00:59:00,079 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 117 [2021-12-07 00:59:00,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:59:00,290 INFO L225 Difference]: With dead ends: 342419 [2021-12-07 00:59:00,290 INFO L226 Difference]: Without dead ends: 161898 [2021-12-07 00:59:00,374 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 00:59:00,375 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 433 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 433 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:59:00,375 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [433 Valid, 204 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 00:59:00,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161898 states. [2021-12-07 00:59:11,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161898 to 107930. [2021-12-07 00:59:11,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107930 states, 107929 states have (on average 1.2142426965875714) internal successors, (131052), 107929 states have internal predecessors, (131052), 0 states have call successors, (0), 0 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 00:59:11,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107930 states to 107930 states and 131052 transitions. [2021-12-07 00:59:11,455 INFO L78 Accepts]: Start accepts. Automaton has 107930 states and 131052 transitions. Word has length 117 [2021-12-07 00:59:11,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:59:11,455 INFO L470 AbstractCegarLoop]: Abstraction has 107930 states and 131052 transitions. [2021-12-07 00:59:11,455 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 00:59:11,455 INFO L276 IsEmpty]: Start isEmpty. Operand 107930 states and 131052 transitions. [2021-12-07 00:59:11,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-12-07 00:59:11,467 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:59:11,468 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:59:11,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-12-07 00:59:11,468 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:59:11,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:59:11,468 INFO L85 PathProgramCache]: Analyzing trace with hash -139284019, now seen corresponding path program 1 times [2021-12-07 00:59:11,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:59:11,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258018317] [2021-12-07 00:59:11,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:59:11,469 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:59:11,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:59:11,700 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 34 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:59:11,700 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:59:11,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258018317] [2021-12-07 00:59:11,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258018317] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:59:11,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754964222] [2021-12-07 00:59:11,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:59:11,701 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:59:11,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48dfc9a7-fd2a-4c96-9fc2-8ee47bd12ba6/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:59:11,702 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48dfc9a7-fd2a-4c96-9fc2-8ee47bd12ba6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:59:11,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48dfc9a7-fd2a-4c96-9fc2-8ee47bd12ba6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-07 00:59:11,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:59:11,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-07 00:59:11,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:59:12,500 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 33 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:59:12,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:59:13,396 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 44 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:59:13,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754964222] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:59:13,396 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:59:13,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 36 [2021-12-07 00:59:13,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775850173] [2021-12-07 00:59:13,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:59:13,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-07 00:59:13,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:59:13,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-07 00:59:13,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1159, Unknown=0, NotChecked=0, Total=1260 [2021-12-07 00:59:13,398 INFO L87 Difference]: Start difference. First operand 107930 states and 131052 transitions. Second operand has 36 states, 36 states have (on average 9.166666666666666) internal successors, (330), 36 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) [2021-12-07 01:01:29,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:01:29,214 INFO L93 Difference]: Finished difference Result 487329 states and 577420 transitions. [2021-12-07 01:01:29,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 580 states. [2021-12-07 01:01:29,215 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 9.166666666666666) internal successors, (330), 36 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) Word has length 119 [2021-12-07 01:01:29,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:01:29,846 INFO L225 Difference]: With dead ends: 487329 [2021-12-07 01:01:29,846 INFO L226 Difference]: Without dead ends: 439610 [2021-12-07 01:01:30,076 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 963 GetRequests, 351 SyntacticMatches, 0 SemanticMatches, 612 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169241 ImplicationChecksByTransitivity, 73.1s TimeCoverageRelationStatistics Valid=44106, Invalid=332276, Unknown=0, NotChecked=0, Total=376382 [2021-12-07 01:01:30,076 INFO L933 BasicCegarLoop]: 286 mSDtfsCounter, 10829 mSDsluCounter, 6724 mSDsCounter, 0 mSdLazyCounter, 6692 mSolverCounterSat, 784 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10829 SdHoareTripleChecker+Valid, 7010 SdHoareTripleChecker+Invalid, 7476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 784 IncrementalHoareTripleChecker+Valid, 6692 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:01:30,077 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10829 Valid, 7010 Invalid, 7476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [784 Valid, 6692 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2021-12-07 01:01:30,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439610 states. [2021-12-07 01:01:50,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439610 to 145577. [2021-12-07 01:01:50,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145577 states, 145576 states have (on average 1.2081180963895148) internal successors, (175873), 145576 states have internal predecessors, (175873), 0 states have call successors, (0), 0 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 01:01:50,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145577 states to 145577 states and 175873 transitions. [2021-12-07 01:01:50,672 INFO L78 Accepts]: Start accepts. Automaton has 145577 states and 175873 transitions. Word has length 119 [2021-12-07 01:01:50,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:01:50,672 INFO L470 AbstractCegarLoop]: Abstraction has 145577 states and 175873 transitions. [2021-12-07 01:01:50,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 9.166666666666666) internal successors, (330), 36 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) [2021-12-07 01:01:50,672 INFO L276 IsEmpty]: Start isEmpty. Operand 145577 states and 175873 transitions. [2021-12-07 01:01:50,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-12-07 01:01:50,688 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:01:50,688 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:01:50,711 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48dfc9a7-fd2a-4c96-9fc2-8ee47bd12ba6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-07 01:01:50,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48dfc9a7-fd2a-4c96-9fc2-8ee47bd12ba6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-12-07 01:01:50,890 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:01:50,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:01:50,891 INFO L85 PathProgramCache]: Analyzing trace with hash 768164215, now seen corresponding path program 2 times [2021-12-07 01:01:50,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:01:50,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951001825] [2021-12-07 01:01:50,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:01:50,892 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:01:50,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:51,006 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 34 proven. 23 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-07 01:01:51,006 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:01:51,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951001825] [2021-12-07 01:01:51,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951001825] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:01:51,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710046144] [2021-12-07 01:01:51,006 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 01:01:51,006 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:01:51,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48dfc9a7-fd2a-4c96-9fc2-8ee47bd12ba6/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:01:51,007 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48dfc9a7-fd2a-4c96-9fc2-8ee47bd12ba6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:01:51,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48dfc9a7-fd2a-4c96-9fc2-8ee47bd12ba6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-07 01:01:51,181 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 01:01:51,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:01:51,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-07 01:01:51,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:01:51,869 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 57 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-07 01:01:51,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:01:52,439 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 66 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-07 01:01:52,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710046144] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:01:52,439 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:01:52,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 25 [2021-12-07 01:01:52,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042021247] [2021-12-07 01:01:52,440 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:01:52,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-07 01:01:52,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:01:52,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-07 01:01:52,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2021-12-07 01:01:52,441 INFO L87 Difference]: Start difference. First operand 145577 states and 175873 transitions. Second operand has 25 states, 25 states have (on average 11.12) internal successors, (278), 25 states have internal predecessors, (278), 0 states have call successors, (0), 0 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 01:02:32,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:02:32,935 INFO L93 Difference]: Finished difference Result 337383 states and 403653 transitions. [2021-12-07 01:02:32,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-12-07 01:02:32,936 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 11.12) internal successors, (278), 25 states have internal predecessors, (278), 0 states have call successors, (0), 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 119 [2021-12-07 01:02:32,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:02:33,299 INFO L225 Difference]: With dead ends: 337383 [2021-12-07 01:02:33,299 INFO L226 Difference]: Without dead ends: 261412 [2021-12-07 01:02:33,360 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 234 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1788 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1482, Invalid=5324, Unknown=0, NotChecked=0, Total=6806 [2021-12-07 01:02:33,361 INFO L933 BasicCegarLoop]: 179 mSDtfsCounter, 2256 mSDsluCounter, 2091 mSDsCounter, 0 mSdLazyCounter, 1317 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2256 SdHoareTripleChecker+Valid, 2270 SdHoareTripleChecker+Invalid, 1423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 1317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:02:33,361 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2256 Valid, 2270 Invalid, 1423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 1317 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-07 01:02:33,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261412 states. [2021-12-07 01:02:50,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261412 to 120207. [2021-12-07 01:02:50,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120207 states, 120206 states have (on average 1.2081177312280584) internal successors, (145223), 120206 states have internal predecessors, (145223), 0 states have call successors, (0), 0 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 01:02:51,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120207 states to 120207 states and 145223 transitions. [2021-12-07 01:02:51,140 INFO L78 Accepts]: Start accepts. Automaton has 120207 states and 145223 transitions. Word has length 119 [2021-12-07 01:02:51,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:02:51,140 INFO L470 AbstractCegarLoop]: Abstraction has 120207 states and 145223 transitions. [2021-12-07 01:02:51,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 11.12) internal successors, (278), 25 states have internal predecessors, (278), 0 states have call successors, (0), 0 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 01:02:51,140 INFO L276 IsEmpty]: Start isEmpty. Operand 120207 states and 145223 transitions. [2021-12-07 01:02:51,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-12-07 01:02:51,155 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:02:51,156 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:02:51,178 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48dfc9a7-fd2a-4c96-9fc2-8ee47bd12ba6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-07 01:02:51,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48dfc9a7-fd2a-4c96-9fc2-8ee47bd12ba6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-12-07 01:02:51,357 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:02:51,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:02:51,359 INFO L85 PathProgramCache]: Analyzing trace with hash 836226491, now seen corresponding path program 1 times [2021-12-07 01:02:51,359 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:02:51,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891651700] [2021-12-07 01:02:51,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:02:51,360 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:02:51,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:02:51,416 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 76 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-07 01:02:51,416 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:02:51,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891651700] [2021-12-07 01:02:51,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891651700] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:02:51,417 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:02:51,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 01:02:51,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001522180] [2021-12-07 01:02:51,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:02:51,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 01:02:51,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:02:51,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 01:02:51,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:02:51,418 INFO L87 Difference]: Start difference. First operand 120207 states and 145223 transitions. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 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 01:03:08,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:03:08,069 INFO L93 Difference]: Finished difference Result 157575 states and 190185 transitions. [2021-12-07 01:03:08,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 01:03:08,070 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 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 120 [2021-12-07 01:03:08,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:03:08,209 INFO L225 Difference]: With dead ends: 157575 [2021-12-07 01:03:08,209 INFO L226 Difference]: Without dead ends: 122201 [2021-12-07 01:03:08,234 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 01:03:08,234 INFO L933 BasicCegarLoop]: 167 mSDtfsCounter, 50 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:03:08,234 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 252 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:03:08,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122201 states. [2021-12-07 01:03:25,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122201 to 121926. [2021-12-07 01:03:25,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121926 states, 121925 states have (on average 1.1981546032396966) internal successors, (146085), 121925 states have internal predecessors, (146085), 0 states have call successors, (0), 0 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 01:03:25,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121926 states to 121926 states and 146085 transitions. [2021-12-07 01:03:25,561 INFO L78 Accepts]: Start accepts. Automaton has 121926 states and 146085 transitions. Word has length 120 [2021-12-07 01:03:25,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:03:25,562 INFO L470 AbstractCegarLoop]: Abstraction has 121926 states and 146085 transitions. [2021-12-07 01:03:25,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 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 01:03:25,562 INFO L276 IsEmpty]: Start isEmpty. Operand 121926 states and 146085 transitions. [2021-12-07 01:03:25,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-12-07 01:03:25,575 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:03:25,575 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-07 01:03:25,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-12-07 01:03:25,575 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:03:25,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:03:25,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1749847137, now seen corresponding path program 2 times [2021-12-07 01:03:25,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:03:25,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565096192] [2021-12-07 01:03:25,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:03:25,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:03:25,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:03:26,028 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 16 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:03:26,028 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:03:26,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565096192] [2021-12-07 01:03:26,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565096192] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:03:26,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423204205] [2021-12-07 01:03:26,028 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 01:03:26,029 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:03:26,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48dfc9a7-fd2a-4c96-9fc2-8ee47bd12ba6/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:03:26,029 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48dfc9a7-fd2a-4c96-9fc2-8ee47bd12ba6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:03:26,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48dfc9a7-fd2a-4c96-9fc2-8ee47bd12ba6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-07 01:03:26,094 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 01:03:26,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:03:26,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-07 01:03:26,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:03:29,243 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 33 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:03:29,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:03:29,964 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 44 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:03:29,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423204205] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:03:29,964 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:03:29,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 14, 12] total 41 [2021-12-07 01:03:29,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808013108] [2021-12-07 01:03:29,964 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:03:29,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-12-07 01:03:29,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:03:29,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-12-07 01:03:29,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1494, Unknown=0, NotChecked=0, Total=1640 [2021-12-07 01:03:29,965 INFO L87 Difference]: Start difference. First operand 121926 states and 146085 transitions. Second operand has 41 states, 41 states have (on average 8.24390243902439) internal successors, (338), 41 states have internal predecessors, (338), 0 states have call successors, (0), 0 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 01:05:27,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:05:27,392 INFO L93 Difference]: Finished difference Result 402903 states and 476905 transitions. [2021-12-07 01:05:27,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 513 states. [2021-12-07 01:05:27,393 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 8.24390243902439) internal successors, (338), 41 states have internal predecessors, (338), 0 states have call successors, (0), 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 120 [2021-12-07 01:05:27,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:05:27,866 INFO L225 Difference]: With dead ends: 402903 [2021-12-07 01:05:27,866 INFO L226 Difference]: Without dead ends: 357903 [2021-12-07 01:05:27,946 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 883 GetRequests, 333 SyntacticMatches, 0 SemanticMatches, 550 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128031 ImplicationChecksByTransitivity, 51.9s TimeCoverageRelationStatistics Valid=24290, Invalid=279862, Unknown=0, NotChecked=0, Total=304152 [2021-12-07 01:05:27,947 INFO L933 BasicCegarLoop]: 1033 mSDtfsCounter, 6863 mSDsluCounter, 23268 mSDsCounter, 0 mSdLazyCounter, 11593 mSolverCounterSat, 559 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6863 SdHoareTripleChecker+Valid, 24301 SdHoareTripleChecker+Invalid, 12152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 559 IncrementalHoareTripleChecker+Valid, 11593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:05:27,947 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6863 Valid, 24301 Invalid, 12152 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [559 Valid, 11593 Invalid, 0 Unknown, 0 Unchecked, 8.0s Time] [2021-12-07 01:05:28,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357903 states. [2021-12-07 01:05:56,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357903 to 179836. [2021-12-07 01:05:56,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179836 states, 179835 states have (on average 1.195646008841438) internal successors, (215019), 179835 states have internal predecessors, (215019), 0 states have call successors, (0), 0 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 01:05:56,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179836 states to 179836 states and 215019 transitions. [2021-12-07 01:05:56,454 INFO L78 Accepts]: Start accepts. Automaton has 179836 states and 215019 transitions. Word has length 120 [2021-12-07 01:05:56,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:05:56,455 INFO L470 AbstractCegarLoop]: Abstraction has 179836 states and 215019 transitions. [2021-12-07 01:05:56,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 8.24390243902439) internal successors, (338), 41 states have internal predecessors, (338), 0 states have call successors, (0), 0 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 01:05:56,455 INFO L276 IsEmpty]: Start isEmpty. Operand 179836 states and 215019 transitions. [2021-12-07 01:05:56,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-12-07 01:05:56,470 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:05:56,470 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:05:56,492 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48dfc9a7-fd2a-4c96-9fc2-8ee47bd12ba6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-07 01:05:56,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48dfc9a7-fd2a-4c96-9fc2-8ee47bd12ba6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:05:56,672 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:05:56,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:05:56,673 INFO L85 PathProgramCache]: Analyzing trace with hash 601730524, now seen corresponding path program 1 times [2021-12-07 01:05:56,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:05:56,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954093000] [2021-12-07 01:05:56,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:05:56,674 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:05:56,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:05:56,736 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-07 01:05:56,736 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:05:56,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954093000] [2021-12-07 01:05:56,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954093000] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:05:56,736 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:05:56,736 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 01:05:56,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707875112] [2021-12-07 01:05:56,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:05:56,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 01:05:56,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:05:56,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 01:05:56,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:05:56,737 INFO L87 Difference]: Start difference. First operand 179836 states and 215019 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 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 01:06:10,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:06:10,305 INFO L93 Difference]: Finished difference Result 265794 states and 318115 transitions. [2021-12-07 01:06:10,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 01:06:10,306 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 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 120 [2021-12-07 01:06:10,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:06:10,405 INFO L225 Difference]: With dead ends: 265794 [2021-12-07 01:06:10,405 INFO L226 Difference]: Without dead ends: 85941 [2021-12-07 01:06:10,468 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 01:06:10,469 INFO L933 BasicCegarLoop]: 121 mSDtfsCounter, 36 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 196 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 01:06:10,469 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 196 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:06:10,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85941 states. [2021-12-07 01:06:23,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85941 to 83180. [2021-12-07 01:06:23,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83180 states, 83179 states have (on average 1.173180730713281) internal successors, (97584), 83179 states have internal predecessors, (97584), 0 states have call successors, (0), 0 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 01:06:23,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83180 states to 83180 states and 97584 transitions. [2021-12-07 01:06:23,512 INFO L78 Accepts]: Start accepts. Automaton has 83180 states and 97584 transitions. Word has length 120 [2021-12-07 01:06:23,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:06:23,512 INFO L470 AbstractCegarLoop]: Abstraction has 83180 states and 97584 transitions. [2021-12-07 01:06:23,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 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 01:06:23,513 INFO L276 IsEmpty]: Start isEmpty. Operand 83180 states and 97584 transitions. [2021-12-07 01:06:23,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-12-07 01:06:23,521 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:06:23,521 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:06:23,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-12-07 01:06:23,521 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:06:23,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:06:23,522 INFO L85 PathProgramCache]: Analyzing trace with hash 934691901, now seen corresponding path program 2 times [2021-12-07 01:06:23,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:06:23,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967611398] [2021-12-07 01:06:23,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:06:23,522 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:06:23,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:06:23,814 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 63 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-07 01:06:23,815 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:06:23,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967611398] [2021-12-07 01:06:23,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967611398] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:06:23,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21801489] [2021-12-07 01:06:23,815 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 01:06:23,815 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:06:23,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48dfc9a7-fd2a-4c96-9fc2-8ee47bd12ba6/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:06:23,816 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48dfc9a7-fd2a-4c96-9fc2-8ee47bd12ba6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:06:23,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48dfc9a7-fd2a-4c96-9fc2-8ee47bd12ba6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-07 01:06:23,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 01:06:23,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:06:23,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-07 01:06:23,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:06:24,842 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 67 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-07 01:06:24,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:06:26,300 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 76 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-07 01:06:26,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21801489] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:06:26,300 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:06:26,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 18] total 42 [2021-12-07 01:06:26,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515888214] [2021-12-07 01:06:26,300 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:06:26,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-12-07 01:06:26,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:06:26,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-12-07 01:06:26,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=323, Invalid=1399, Unknown=0, NotChecked=0, Total=1722 [2021-12-07 01:06:26,301 INFO L87 Difference]: Start difference. First operand 83180 states and 97584 transitions. Second operand has 42 states, 42 states have (on average 6.333333333333333) internal successors, (266), 42 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:06:59,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:06:59,770 INFO L93 Difference]: Finished difference Result 208733 states and 243959 transitions. [2021-12-07 01:06:59,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-12-07 01:06:59,771 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 6.333333333333333) internal successors, (266), 42 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2021-12-07 01:06:59,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:06:59,993 INFO L225 Difference]: With dead ends: 208733 [2021-12-07 01:06:59,994 INFO L226 Difference]: Without dead ends: 162697 [2021-12-07 01:07:00,033 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2184 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2069, Invalid=6121, Unknown=0, NotChecked=0, Total=8190 [2021-12-07 01:07:00,033 INFO L933 BasicCegarLoop]: 142 mSDtfsCounter, 2858 mSDsluCounter, 4271 mSDsCounter, 0 mSdLazyCounter, 3028 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2858 SdHoareTripleChecker+Valid, 4413 SdHoareTripleChecker+Invalid, 3225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 3028 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:07:00,033 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2858 Valid, 4413 Invalid, 3225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 3028 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-07 01:07:00,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162697 states.