./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.07.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8326660-80d6-44d8-955d-ddc8cd973646/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8326660-80d6-44d8-955d-ddc8cd973646/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8326660-80d6-44d8-955d-ddc8cd973646/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8326660-80d6-44d8-955d-ddc8cd973646/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.07.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8326660-80d6-44d8-955d-ddc8cd973646/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8326660-80d6-44d8-955d-ddc8cd973646/bin/uautomizer-DQz5hQGWxF --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 a0cf3566e24b445695278143ce06a9bd6b4348c9de696d02fe86c47eb1775574 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 07:19:39,482 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 07:19:39,485 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 07:19:39,542 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 07:19:39,543 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 07:19:39,545 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 07:19:39,551 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 07:19:39,556 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 07:19:39,558 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 07:19:39,566 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 07:19:39,568 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 07:19:39,569 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 07:19:39,570 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 07:19:39,573 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 07:19:39,575 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 07:19:39,580 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 07:19:39,584 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 07:19:39,585 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 07:19:39,591 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 07:19:39,593 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 07:19:39,600 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 07:19:39,602 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 07:19:39,603 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 07:19:39,606 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 07:19:39,613 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 07:19:39,614 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 07:19:39,614 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 07:19:39,617 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 07:19:39,617 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 07:19:39,619 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 07:19:39,620 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 07:19:39,621 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 07:19:39,623 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 07:19:39,623 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 07:19:39,625 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 07:19:39,625 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 07:19:39,626 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 07:19:39,626 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 07:19:39,626 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 07:19:39,627 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 07:19:39,628 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 07:19:39,629 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8326660-80d6-44d8-955d-ddc8cd973646/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-20 07:19:39,664 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 07:19:39,665 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 07:19:39,665 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 07:19:39,672 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 07:19:39,673 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 07:19:39,673 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 07:19:39,674 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 07:19:39,674 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 07:19:39,674 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 07:19:39,675 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 07:19:39,676 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 07:19:39,676 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 07:19:39,677 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 07:19:39,677 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 07:19:39,677 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 07:19:39,677 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 07:19:39,677 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 07:19:39,678 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 07:19:39,678 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 07:19:39,678 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 07:19:39,678 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 07:19:39,679 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 07:19:39,679 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 07:19:39,679 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 07:19:39,679 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 07:19:39,680 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 07:19:39,680 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 07:19:39,680 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 07:19:39,680 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 07:19:39,682 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 07:19:39,682 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 07:19:39,683 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 07:19:39,683 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 07:19:39,683 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 07:19:39,684 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_f8326660-80d6-44d8-955d-ddc8cd973646/bin/uautomizer-DQz5hQGWxF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8326660-80d6-44d8-955d-ddc8cd973646/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a0cf3566e24b445695278143ce06a9bd6b4348c9de696d02fe86c47eb1775574 [2021-11-20 07:19:40,014 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 07:19:40,046 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 07:19:40,049 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 07:19:40,050 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 07:19:40,051 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 07:19:40,053 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8326660-80d6-44d8-955d-ddc8cd973646/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.07.cil-2.c [2021-11-20 07:19:40,134 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8326660-80d6-44d8-955d-ddc8cd973646/bin/uautomizer-DQz5hQGWxF/data/813ae440d/49ecfeea27de4749a50da2b9f60676de/FLAGb97bf72fb [2021-11-20 07:19:40,669 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 07:19:40,670 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8326660-80d6-44d8-955d-ddc8cd973646/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.07.cil-2.c [2021-11-20 07:19:40,690 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8326660-80d6-44d8-955d-ddc8cd973646/bin/uautomizer-DQz5hQGWxF/data/813ae440d/49ecfeea27de4749a50da2b9f60676de/FLAGb97bf72fb [2021-11-20 07:19:40,990 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8326660-80d6-44d8-955d-ddc8cd973646/bin/uautomizer-DQz5hQGWxF/data/813ae440d/49ecfeea27de4749a50da2b9f60676de [2021-11-20 07:19:40,996 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 07:19:40,998 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 07:19:40,999 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 07:19:40,999 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 07:19:41,003 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 07:19:41,003 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:19:40" (1/1) ... [2021-11-20 07:19:41,005 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2eb96869 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:19:41, skipping insertion in model container [2021-11-20 07:19:41,005 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:19:40" (1/1) ... [2021-11-20 07:19:41,012 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 07:19:41,073 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 07:19:41,259 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_f8326660-80d6-44d8-955d-ddc8cd973646/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.07.cil-2.c[913,926] [2021-11-20 07:19:41,336 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_f8326660-80d6-44d8-955d-ddc8cd973646/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.07.cil-2.c[5977,5990] [2021-11-20 07:19:41,484 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 07:19:41,495 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 07:19:41,508 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_f8326660-80d6-44d8-955d-ddc8cd973646/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.07.cil-2.c[913,926] [2021-11-20 07:19:41,527 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_f8326660-80d6-44d8-955d-ddc8cd973646/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.07.cil-2.c[5977,5990] [2021-11-20 07:19:41,613 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 07:19:41,656 INFO L208 MainTranslator]: Completed translation [2021-11-20 07:19:41,656 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:19:41 WrapperNode [2021-11-20 07:19:41,657 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 07:19:41,658 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 07:19:41,658 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 07:19:41,658 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 07:19:41,666 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:19:41" (1/1) ... [2021-11-20 07:19:41,695 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:19:41" (1/1) ... [2021-11-20 07:19:41,754 INFO L137 Inliner]: procedures = 62, calls = 70, calls flagged for inlining = 36, calls inlined = 36, statements flattened = 770 [2021-11-20 07:19:41,754 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 07:19:41,755 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 07:19:41,755 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 07:19:41,756 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 07:19:41,765 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:19:41" (1/1) ... [2021-11-20 07:19:41,765 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:19:41" (1/1) ... [2021-11-20 07:19:41,770 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:19:41" (1/1) ... [2021-11-20 07:19:41,770 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:19:41" (1/1) ... [2021-11-20 07:19:41,798 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:19:41" (1/1) ... [2021-11-20 07:19:41,822 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:19:41" (1/1) ... [2021-11-20 07:19:41,825 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:19:41" (1/1) ... [2021-11-20 07:19:41,844 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 07:19:41,845 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 07:19:41,845 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 07:19:41,845 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 07:19:41,846 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:19:41" (1/1) ... [2021-11-20 07:19:41,875 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 07:19:41,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8326660-80d6-44d8-955d-ddc8cd973646/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:19:41,898 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8326660-80d6-44d8-955d-ddc8cd973646/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 07:19:41,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8326660-80d6-44d8-955d-ddc8cd973646/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 07:19:41,942 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 07:19:41,942 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-11-20 07:19:41,942 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-11-20 07:19:41,942 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2021-11-20 07:19:41,943 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2021-11-20 07:19:41,943 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2021-11-20 07:19:41,943 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2021-11-20 07:19:41,943 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2021-11-20 07:19:41,943 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2021-11-20 07:19:41,943 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2021-11-20 07:19:41,943 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2021-11-20 07:19:41,944 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2021-11-20 07:19:41,944 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2021-11-20 07:19:41,944 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2021-11-20 07:19:41,944 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2021-11-20 07:19:41,944 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 07:19:41,944 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2021-11-20 07:19:41,945 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2021-11-20 07:19:41,945 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 07:19:41,945 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 07:19:41,945 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2021-11-20 07:19:41,945 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2021-11-20 07:19:41,945 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2021-11-20 07:19:41,945 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2021-11-20 07:19:42,060 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 07:19:42,079 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 07:19:42,867 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 07:19:42,890 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 07:19:42,890 INFO L301 CfgBuilder]: Removed 14 assume(true) statements. [2021-11-20 07:19:42,893 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:19:42 BoogieIcfgContainer [2021-11-20 07:19:42,894 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 07:19:42,895 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 07:19:42,896 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 07:19:42,899 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 07:19:42,899 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 07:19:40" (1/3) ... [2021-11-20 07:19:42,900 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8550b2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:19:42, skipping insertion in model container [2021-11-20 07:19:42,901 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:19:41" (2/3) ... [2021-11-20 07:19:42,901 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8550b2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:19:42, skipping insertion in model container [2021-11-20 07:19:42,901 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:19:42" (3/3) ... [2021-11-20 07:19:42,906 INFO L111 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-2+token_ring.07.cil-2.c [2021-11-20 07:19:42,918 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 07:19:42,918 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-20 07:19:42,991 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 07:19:42,999 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-20 07:19:42,999 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-20 07:19:43,028 INFO L276 IsEmpty]: Start isEmpty. Operand has 337 states, 295 states have (on average 1.6305084745762712) internal successors, (481), 302 states have internal predecessors, (481), 29 states have call successors, (29), 10 states have call predecessors, (29), 10 states have return successors, (29), 27 states have call predecessors, (29), 29 states have call successors, (29) [2021-11-20 07:19:43,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-20 07:19:43,039 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:19:43,039 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] [2021-11-20 07:19:43,040 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:19:43,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:19:43,046 INFO L85 PathProgramCache]: Analyzing trace with hash -1847499811, now seen corresponding path program 1 times [2021-11-20 07:19:43,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:19:43,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625192480] [2021-11-20 07:19:43,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:19:43,058 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:19:43,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:43,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-20 07:19:43,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:43,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-20 07:19:43,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:43,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:19:43,422 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:19:43,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625192480] [2021-11-20 07:19:43,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625192480] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:19:43,423 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:19:43,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 07:19:43,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162994382] [2021-11-20 07:19:43,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:19:43,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 07:19:43,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:19:43,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 07:19:43,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 07:19:43,468 INFO L87 Difference]: Start difference. First operand has 337 states, 295 states have (on average 1.6305084745762712) internal successors, (481), 302 states have internal predecessors, (481), 29 states have call successors, (29), 10 states have call predecessors, (29), 10 states have return successors, (29), 27 states have call predecessors, (29), 29 states have call successors, (29) Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 07:19:43,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:19:43,904 INFO L93 Difference]: Finished difference Result 723 states and 1156 transitions. [2021-11-20 07:19:43,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 07:19:43,907 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 44 [2021-11-20 07:19:43,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:19:43,940 INFO L225 Difference]: With dead ends: 723 [2021-11-20 07:19:43,940 INFO L226 Difference]: Without dead ends: 396 [2021-11-20 07:19:43,951 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:19:43,957 INFO L933 BasicCegarLoop]: 521 mSDtfsCounter, 657 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 678 SdHoareTripleChecker+Valid, 854 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:19:43,959 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [678 Valid, 854 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 07:19:43,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2021-11-20 07:19:44,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 390. [2021-11-20 07:19:44,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 344 states have (on average 1.505813953488372) internal successors, (518), 349 states have internal predecessors, (518), 33 states have call successors, (33), 12 states have call predecessors, (33), 11 states have return successors, (35), 29 states have call predecessors, (35), 29 states have call successors, (35) [2021-11-20 07:19:44,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 586 transitions. [2021-11-20 07:19:44,070 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 586 transitions. Word has length 44 [2021-11-20 07:19:44,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:19:44,071 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 586 transitions. [2021-11-20 07:19:44,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 07:19:44,072 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 586 transitions. [2021-11-20 07:19:44,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-20 07:19:44,078 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:19:44,078 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] [2021-11-20 07:19:44,078 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 07:19:44,103 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:19:44,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:19:44,104 INFO L85 PathProgramCache]: Analyzing trace with hash 2047693479, now seen corresponding path program 1 times [2021-11-20 07:19:44,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:19:44,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122737522] [2021-11-20 07:19:44,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:19:44,105 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:19:44,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:44,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-20 07:19:44,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:44,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-20 07:19:44,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:44,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:19:44,211 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:19:44,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122737522] [2021-11-20 07:19:44,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122737522] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:19:44,212 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:19:44,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 07:19:44,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195416147] [2021-11-20 07:19:44,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:19:44,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 07:19:44,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:19:44,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 07:19:44,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 07:19:44,215 INFO L87 Difference]: Start difference. First operand 390 states and 586 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 07:19:44,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:19:44,673 INFO L93 Difference]: Finished difference Result 638 states and 926 transitions. [2021-11-20 07:19:44,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 07:19:44,674 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2021-11-20 07:19:44,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:19:44,682 INFO L225 Difference]: With dead ends: 638 [2021-11-20 07:19:44,682 INFO L226 Difference]: Without dead ends: 514 [2021-11-20 07:19:44,687 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:19:44,689 INFO L933 BasicCegarLoop]: 521 mSDtfsCounter, 279 mSDsluCounter, 552 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 1073 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 07:19:44,690 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [281 Valid, 1073 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 07:19:44,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2021-11-20 07:19:44,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 457. [2021-11-20 07:19:44,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 457 states, 405 states have (on average 1.4864197530864198) internal successors, (602), 410 states have internal predecessors, (602), 36 states have call successors, (36), 15 states have call predecessors, (36), 14 states have return successors, (38), 32 states have call predecessors, (38), 32 states have call successors, (38) [2021-11-20 07:19:44,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 676 transitions. [2021-11-20 07:19:44,757 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 676 transitions. Word has length 45 [2021-11-20 07:19:44,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:19:44,757 INFO L470 AbstractCegarLoop]: Abstraction has 457 states and 676 transitions. [2021-11-20 07:19:44,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 07:19:44,758 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 676 transitions. [2021-11-20 07:19:44,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-20 07:19:44,761 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:19:44,761 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] [2021-11-20 07:19:44,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 07:19:44,761 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:19:44,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:19:44,762 INFO L85 PathProgramCache]: Analyzing trace with hash 763336018, now seen corresponding path program 1 times [2021-11-20 07:19:44,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:19:44,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393276131] [2021-11-20 07:19:44,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:19:44,763 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:19:44,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:44,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-20 07:19:44,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:44,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-20 07:19:44,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:44,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:19:44,853 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:19:44,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393276131] [2021-11-20 07:19:44,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393276131] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:19:44,855 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:19:44,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 07:19:44,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811991146] [2021-11-20 07:19:44,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:19:44,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 07:19:44,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:19:44,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 07:19:44,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 07:19:44,859 INFO L87 Difference]: Start difference. First operand 457 states and 676 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 07:19:45,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:19:45,075 INFO L93 Difference]: Finished difference Result 865 states and 1235 transitions. [2021-11-20 07:19:45,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 07:19:45,076 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2021-11-20 07:19:45,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:19:45,083 INFO L225 Difference]: With dead ends: 865 [2021-11-20 07:19:45,083 INFO L226 Difference]: Without dead ends: 674 [2021-11-20 07:19:45,084 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:19:45,086 INFO L933 BasicCegarLoop]: 507 mSDtfsCounter, 673 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 694 SdHoareTripleChecker+Valid, 828 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:19:45,087 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [694 Valid, 828 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 07:19:45,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2021-11-20 07:19:45,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 622. [2021-11-20 07:19:45,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 622 states, 551 states have (on average 1.4373865698729582) internal successors, (792), 559 states have internal predecessors, (792), 47 states have call successors, (47), 22 states have call predecessors, (47), 22 states have return successors, (55), 41 states have call predecessors, (55), 43 states have call successors, (55) [2021-11-20 07:19:45,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 622 states to 622 states and 894 transitions. [2021-11-20 07:19:45,141 INFO L78 Accepts]: Start accepts. Automaton has 622 states and 894 transitions. Word has length 45 [2021-11-20 07:19:45,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:19:45,142 INFO L470 AbstractCegarLoop]: Abstraction has 622 states and 894 transitions. [2021-11-20 07:19:45,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 07:19:45,142 INFO L276 IsEmpty]: Start isEmpty. Operand 622 states and 894 transitions. [2021-11-20 07:19:45,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-20 07:19:45,147 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:19:45,147 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:19:45,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-20 07:19:45,147 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:19:45,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:19:45,148 INFO L85 PathProgramCache]: Analyzing trace with hash 313583757, now seen corresponding path program 1 times [2021-11-20 07:19:45,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:19:45,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191262535] [2021-11-20 07:19:45,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:19:45,149 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:19:45,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:45,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-20 07:19:45,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:45,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-20 07:19:45,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:45,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-20 07:19:45,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:45,268 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 07:19:45,269 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:19:45,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191262535] [2021-11-20 07:19:45,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191262535] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:19:45,269 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:19:45,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 07:19:45,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445541855] [2021-11-20 07:19:45,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:19:45,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 07:19:45,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:19:45,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 07:19:45,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 07:19:45,271 INFO L87 Difference]: Start difference. First operand 622 states and 894 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:19:45,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:19:45,692 INFO L93 Difference]: Finished difference Result 1206 states and 1679 transitions. [2021-11-20 07:19:45,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 07:19:45,693 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 62 [2021-11-20 07:19:45,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:19:45,700 INFO L225 Difference]: With dead ends: 1206 [2021-11-20 07:19:45,700 INFO L226 Difference]: Without dead ends: 850 [2021-11-20 07:19:45,701 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:19:45,703 INFO L933 BasicCegarLoop]: 546 mSDtfsCounter, 263 mSDsluCounter, 561 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 1107 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:19:45,704 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [265 Valid, 1107 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 07:19:45,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 850 states. [2021-11-20 07:19:45,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 850 to 812. [2021-11-20 07:19:45,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 812 states, 717 states have (on average 1.383542538354254) internal successors, (992), 727 states have internal predecessors, (992), 61 states have call successors, (61), 30 states have call predecessors, (61), 32 states have return successors, (79), 55 states have call predecessors, (79), 57 states have call successors, (79) [2021-11-20 07:19:45,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 1132 transitions. [2021-11-20 07:19:45,760 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 1132 transitions. Word has length 62 [2021-11-20 07:19:45,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:19:45,761 INFO L470 AbstractCegarLoop]: Abstraction has 812 states and 1132 transitions. [2021-11-20 07:19:45,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:19:45,761 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 1132 transitions. [2021-11-20 07:19:45,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-20 07:19:45,765 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:19:45,765 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 07:19:45,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-20 07:19:45,766 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:19:45,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:19:45,766 INFO L85 PathProgramCache]: Analyzing trace with hash 37906234, now seen corresponding path program 1 times [2021-11-20 07:19:45,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:19:45,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029451158] [2021-11-20 07:19:45,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:19:45,767 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:19:45,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:45,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-20 07:19:45,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:45,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-20 07:19:45,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:45,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-11-20 07:19:45,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:45,827 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-20 07:19:45,828 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:19:45,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029451158] [2021-11-20 07:19:45,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029451158] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:19:45,828 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:19:45,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 07:19:45,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616285023] [2021-11-20 07:19:45,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:19:45,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 07:19:45,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:19:45,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 07:19:45,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 07:19:45,830 INFO L87 Difference]: Start difference. First operand 812 states and 1132 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 07:19:46,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:19:46,030 INFO L93 Difference]: Finished difference Result 1465 states and 1985 transitions. [2021-11-20 07:19:46,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 07:19:46,030 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 67 [2021-11-20 07:19:46,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:19:46,039 INFO L225 Difference]: With dead ends: 1465 [2021-11-20 07:19:46,039 INFO L226 Difference]: Without dead ends: 1011 [2021-11-20 07:19:46,041 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:19:46,042 INFO L933 BasicCegarLoop]: 501 mSDtfsCounter, 663 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 684 SdHoareTripleChecker+Valid, 822 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:19:46,043 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [684 Valid, 822 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:19:46,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1011 states. [2021-11-20 07:19:46,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1011 to 956. [2021-11-20 07:19:46,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 956 states, 845 states have (on average 1.352662721893491) internal successors, (1143), 857 states have internal predecessors, (1143), 69 states have call successors, (69), 36 states have call predecessors, (69), 40 states have return successors, (93), 63 states have call predecessors, (93), 65 states have call successors, (93) [2021-11-20 07:19:46,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 956 states to 956 states and 1305 transitions. [2021-11-20 07:19:46,138 INFO L78 Accepts]: Start accepts. Automaton has 956 states and 1305 transitions. Word has length 67 [2021-11-20 07:19:46,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:19:46,139 INFO L470 AbstractCegarLoop]: Abstraction has 956 states and 1305 transitions. [2021-11-20 07:19:46,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 07:19:46,139 INFO L276 IsEmpty]: Start isEmpty. Operand 956 states and 1305 transitions. [2021-11-20 07:19:46,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-20 07:19:46,142 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:19:46,142 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:19:46,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-20 07:19:46,143 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:19:46,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:19:46,143 INFO L85 PathProgramCache]: Analyzing trace with hash -2022374513, now seen corresponding path program 1 times [2021-11-20 07:19:46,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:19:46,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431350892] [2021-11-20 07:19:46,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:19:46,144 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:19:46,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:46,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-20 07:19:46,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:46,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-20 07:19:46,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:46,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-20 07:19:46,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:46,309 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 07:19:46,309 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:19:46,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431350892] [2021-11-20 07:19:46,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431350892] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:19:46,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946802006] [2021-11-20 07:19:46,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:19:46,311 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:19:46,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8326660-80d6-44d8-955d-ddc8cd973646/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:19:46,312 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8326660-80d6-44d8-955d-ddc8cd973646/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:19:46,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8326660-80d6-44d8-955d-ddc8cd973646/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 07:19:46,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:46,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 07:19:46,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:19:46,627 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 07:19:46,627 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:19:46,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946802006] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:19:46,628 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:19:46,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-11-20 07:19:46,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148040946] [2021-11-20 07:19:46,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:19:46,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:19:46,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:19:46,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:19:46,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-20 07:19:46,631 INFO L87 Difference]: Start difference. First operand 956 states and 1305 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 07:19:46,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:19:46,717 INFO L93 Difference]: Finished difference Result 1499 states and 2028 transitions. [2021-11-20 07:19:46,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:19:46,717 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 68 [2021-11-20 07:19:46,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:19:46,726 INFO L225 Difference]: With dead ends: 1499 [2021-11-20 07:19:46,726 INFO L226 Difference]: Without dead ends: 954 [2021-11-20 07:19:46,728 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-20 07:19:46,730 INFO L933 BasicCegarLoop]: 545 mSDtfsCounter, 72 mSDsluCounter, 467 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 1012 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:19:46,730 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 1012 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:19:46,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 954 states. [2021-11-20 07:19:46,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 954 to 910. [2021-11-20 07:19:46,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 910 states, 805 states have (on average 1.3391304347826087) internal successors, (1078), 817 states have internal predecessors, (1078), 65 states have call successors, (65), 34 states have call predecessors, (65), 38 states have return successors, (87), 59 states have call predecessors, (87), 61 states have call successors, (87) [2021-11-20 07:19:46,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 910 states to 910 states and 1230 transitions. [2021-11-20 07:19:46,827 INFO L78 Accepts]: Start accepts. Automaton has 910 states and 1230 transitions. Word has length 68 [2021-11-20 07:19:46,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:19:46,828 INFO L470 AbstractCegarLoop]: Abstraction has 910 states and 1230 transitions. [2021-11-20 07:19:46,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 07:19:46,828 INFO L276 IsEmpty]: Start isEmpty. Operand 910 states and 1230 transitions. [2021-11-20 07:19:46,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-20 07:19:46,832 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:19:46,832 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:19:46,915 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8326660-80d6-44d8-955d-ddc8cd973646/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 07:19:47,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8326660-80d6-44d8-955d-ddc8cd973646/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:19:47,051 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:19:47,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:19:47,052 INFO L85 PathProgramCache]: Analyzing trace with hash 157597262, now seen corresponding path program 1 times [2021-11-20 07:19:47,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:19:47,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505816457] [2021-11-20 07:19:47,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:19:47,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:19:47,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:47,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-20 07:19:47,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:47,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-20 07:19:47,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:47,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-20 07:19:47,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:47,209 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 07:19:47,209 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:19:47,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505816457] [2021-11-20 07:19:47,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505816457] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:19:47,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583000532] [2021-11-20 07:19:47,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:19:47,212 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:19:47,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8326660-80d6-44d8-955d-ddc8cd973646/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:19:47,215 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8326660-80d6-44d8-955d-ddc8cd973646/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:19:47,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8326660-80d6-44d8-955d-ddc8cd973646/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 07:19:47,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:47,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 07:19:47,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:19:47,568 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 07:19:47,568 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:19:47,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583000532] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:19:47,569 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:19:47,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2021-11-20 07:19:47,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554707749] [2021-11-20 07:19:47,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:19:47,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 07:19:47,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:19:47,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 07:19:47,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-20 07:19:47,573 INFO L87 Difference]: Start difference. First operand 910 states and 1230 transitions. Second operand has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-20 07:19:47,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:19:47,665 INFO L93 Difference]: Finished difference Result 1404 states and 1879 transitions. [2021-11-20 07:19:47,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 07:19:47,666 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 68 [2021-11-20 07:19:47,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:19:47,674 INFO L225 Difference]: With dead ends: 1404 [2021-11-20 07:19:47,674 INFO L226 Difference]: Without dead ends: 1002 [2021-11-20 07:19:47,676 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-11-20 07:19:47,677 INFO L933 BasicCegarLoop]: 506 mSDtfsCounter, 39 mSDsluCounter, 1474 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 1980 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:19:47,678 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 1980 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:19:47,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1002 states. [2021-11-20 07:19:47,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1002 to 934. [2021-11-20 07:19:47,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 934 states, 829 states have (on average 1.3293124246079615) internal successors, (1102), 841 states have internal predecessors, (1102), 65 states have call successors, (65), 34 states have call predecessors, (65), 38 states have return successors, (87), 59 states have call predecessors, (87), 61 states have call successors, (87) [2021-11-20 07:19:47,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 934 states to 934 states and 1254 transitions. [2021-11-20 07:19:47,751 INFO L78 Accepts]: Start accepts. Automaton has 934 states and 1254 transitions. Word has length 68 [2021-11-20 07:19:47,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:19:47,752 INFO L470 AbstractCegarLoop]: Abstraction has 934 states and 1254 transitions. [2021-11-20 07:19:47,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-20 07:19:47,752 INFO L276 IsEmpty]: Start isEmpty. Operand 934 states and 1254 transitions. [2021-11-20 07:19:47,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-20 07:19:47,755 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:19:47,755 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] [2021-11-20 07:19:47,793 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8326660-80d6-44d8-955d-ddc8cd973646/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 07:19:47,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8326660-80d6-44d8-955d-ddc8cd973646/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:19:47,983 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:19:47,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:19:47,984 INFO L85 PathProgramCache]: Analyzing trace with hash 744403276, now seen corresponding path program 1 times [2021-11-20 07:19:47,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:19:47,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109421342] [2021-11-20 07:19:47,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:19:47,984 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:19:47,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:48,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-20 07:19:48,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:48,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-20 07:19:48,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:48,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-20 07:19:48,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:48,074 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 07:19:48,074 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:19:48,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109421342] [2021-11-20 07:19:48,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109421342] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:19:48,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101835366] [2021-11-20 07:19:48,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:19:48,077 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:19:48,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8326660-80d6-44d8-955d-ddc8cd973646/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:19:48,078 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8326660-80d6-44d8-955d-ddc8cd973646/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:19:48,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8326660-80d6-44d8-955d-ddc8cd973646/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 07:19:48,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:48,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 07:19:48,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:19:48,346 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:19:48,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:19:48,473 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-20 07:19:48,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101835366] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-20 07:19:48,473 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:19:48,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 8 [2021-11-20 07:19:48,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078094382] [2021-11-20 07:19:48,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:19:48,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 07:19:48,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:19:48,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 07:19:48,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-20 07:19:48,475 INFO L87 Difference]: Start difference. First operand 934 states and 1254 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:19:48,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:19:48,637 INFO L93 Difference]: Finished difference Result 986 states and 1316 transitions. [2021-11-20 07:19:48,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 07:19:48,638 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 68 [2021-11-20 07:19:48,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:19:48,646 INFO L225 Difference]: With dead ends: 986 [2021-11-20 07:19:48,646 INFO L226 Difference]: Without dead ends: 983 [2021-11-20 07:19:48,647 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-11-20 07:19:48,648 INFO L933 BasicCegarLoop]: 517 mSDtfsCounter, 885 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 885 SdHoareTripleChecker+Valid, 582 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:19:48,649 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [885 Valid, 582 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:19:48,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 983 states. [2021-11-20 07:19:48,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 983 to 933. [2021-11-20 07:19:48,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 933 states, 829 states have (on average 1.3268998793727382) internal successors, (1100), 840 states have internal predecessors, (1100), 64 states have call successors, (64), 34 states have call predecessors, (64), 38 states have return successors, (87), 59 states have call predecessors, (87), 61 states have call successors, (87) [2021-11-20 07:19:48,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 933 states to 933 states and 1251 transitions. [2021-11-20 07:19:48,737 INFO L78 Accepts]: Start accepts. Automaton has 933 states and 1251 transitions. Word has length 68 [2021-11-20 07:19:48,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:19:48,738 INFO L470 AbstractCegarLoop]: Abstraction has 933 states and 1251 transitions. [2021-11-20 07:19:48,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:19:48,738 INFO L276 IsEmpty]: Start isEmpty. Operand 933 states and 1251 transitions. [2021-11-20 07:19:48,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-20 07:19:48,741 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:19:48,741 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] [2021-11-20 07:19:48,779 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8326660-80d6-44d8-955d-ddc8cd973646/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 07:19:48,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8326660-80d6-44d8-955d-ddc8cd973646/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:19:48,963 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:19:48,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:19:48,964 INFO L85 PathProgramCache]: Analyzing trace with hash 1600611039, now seen corresponding path program 1 times [2021-11-20 07:19:48,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:19:48,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321503000] [2021-11-20 07:19:48,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:19:48,964 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:19:48,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:48,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-20 07:19:48,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:49,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-20 07:19:49,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:49,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-20 07:19:49,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:49,054 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 07:19:49,055 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:19:49,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321503000] [2021-11-20 07:19:49,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321503000] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:19:49,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068221404] [2021-11-20 07:19:49,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:19:49,056 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:19:49,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8326660-80d6-44d8-955d-ddc8cd973646/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:19:49,057 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8326660-80d6-44d8-955d-ddc8cd973646/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:19:49,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8326660-80d6-44d8-955d-ddc8cd973646/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 07:19:49,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:49,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-20 07:19:49,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:19:49,598 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:19:49,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:19:49,789 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-20 07:19:49,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068221404] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:19:49,790 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:19:49,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 4] total 11 [2021-11-20 07:19:49,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585366561] [2021-11-20 07:19:49,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:19:49,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-20 07:19:49,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:19:49,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-20 07:19:49,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-11-20 07:19:49,792 INFO L87 Difference]: Start difference. First operand 933 states and 1251 transitions. Second operand has 11 states, 11 states have (on average 13.272727272727273) internal successors, (146), 10 states have internal predecessors, (146), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2021-11-20 07:19:51,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:19:51,651 INFO L93 Difference]: Finished difference Result 2320 states and 3008 transitions. [2021-11-20 07:19:51,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-11-20 07:19:51,652 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 13.272727272727273) internal successors, (146), 10 states have internal predecessors, (146), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 69 [2021-11-20 07:19:51,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:19:51,663 INFO L225 Difference]: With dead ends: 2320 [2021-11-20 07:19:51,664 INFO L226 Difference]: Without dead ends: 1683 [2021-11-20 07:19:51,667 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 848 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=460, Invalid=2402, Unknown=0, NotChecked=0, Total=2862 [2021-11-20 07:19:51,668 INFO L933 BasicCegarLoop]: 587 mSDtfsCounter, 1379 mSDsluCounter, 2253 mSDsCounter, 0 mSdLazyCounter, 1298 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1407 SdHoareTripleChecker+Valid, 2840 SdHoareTripleChecker+Invalid, 1396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 1298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:19:51,669 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1407 Valid, 2840 Invalid, 1396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 1298 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-20 07:19:51,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1683 states. [2021-11-20 07:19:51,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1683 to 1133. [2021-11-20 07:19:51,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1133 states, 1009 states have (on average 1.3012884043607533) internal successors, (1313), 1026 states have internal predecessors, (1313), 73 states have call successors, (73), 41 states have call predecessors, (73), 49 states have return successors, (100), 66 states have call predecessors, (100), 70 states have call successors, (100) [2021-11-20 07:19:51,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1133 states to 1133 states and 1486 transitions. [2021-11-20 07:19:51,761 INFO L78 Accepts]: Start accepts. Automaton has 1133 states and 1486 transitions. Word has length 69 [2021-11-20 07:19:51,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:19:51,762 INFO L470 AbstractCegarLoop]: Abstraction has 1133 states and 1486 transitions. [2021-11-20 07:19:51,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.272727272727273) internal successors, (146), 10 states have internal predecessors, (146), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2021-11-20 07:19:51,762 INFO L276 IsEmpty]: Start isEmpty. Operand 1133 states and 1486 transitions. [2021-11-20 07:19:51,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-20 07:19:51,766 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:19:51,766 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-20 07:19:51,805 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8326660-80d6-44d8-955d-ddc8cd973646/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-20 07:19:51,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8326660-80d6-44d8-955d-ddc8cd973646/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:19:51,987 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:19:51,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:19:51,987 INFO L85 PathProgramCache]: Analyzing trace with hash 155816347, now seen corresponding path program 1 times [2021-11-20 07:19:51,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:19:51,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513005878] [2021-11-20 07:19:51,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:19:51,988 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:19:51,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:52,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-20 07:19:52,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:52,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-20 07:19:52,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:52,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-20 07:19:52,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:52,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-11-20 07:19:52,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:52,047 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-20 07:19:52,048 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:19:52,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513005878] [2021-11-20 07:19:52,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513005878] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:19:52,048 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:19:52,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 07:19:52,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64624032] [2021-11-20 07:19:52,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:19:52,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 07:19:52,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:19:52,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 07:19:52,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 07:19:52,050 INFO L87 Difference]: Start difference. First operand 1133 states and 1486 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-20 07:19:52,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:19:52,278 INFO L93 Difference]: Finished difference Result 1851 states and 2368 transitions. [2021-11-20 07:19:52,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 07:19:52,279 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 88 [2021-11-20 07:19:52,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:19:52,286 INFO L225 Difference]: With dead ends: 1851 [2021-11-20 07:19:52,287 INFO L226 Difference]: Without dead ends: 1175 [2021-11-20 07:19:52,289 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:19:52,290 INFO L933 BasicCegarLoop]: 514 mSDtfsCounter, 665 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 687 SdHoareTripleChecker+Valid, 841 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:19:52,290 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [687 Valid, 841 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:19:52,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1175 states. [2021-11-20 07:19:52,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1175 to 1061. [2021-11-20 07:19:52,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1061 states, 944 states have (on average 1.2944915254237288) internal successors, (1222), 961 states have internal predecessors, (1222), 70 states have call successors, (70), 38 states have call predecessors, (70), 45 states have return successors, (95), 62 states have call predecessors, (95), 67 states have call successors, (95) [2021-11-20 07:19:52,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1061 states to 1061 states and 1387 transitions. [2021-11-20 07:19:52,372 INFO L78 Accepts]: Start accepts. Automaton has 1061 states and 1387 transitions. Word has length 88 [2021-11-20 07:19:52,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:19:52,372 INFO L470 AbstractCegarLoop]: Abstraction has 1061 states and 1387 transitions. [2021-11-20 07:19:52,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-20 07:19:52,373 INFO L276 IsEmpty]: Start isEmpty. Operand 1061 states and 1387 transitions. [2021-11-20 07:19:52,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-20 07:19:52,377 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:19:52,377 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:19:52,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-20 07:19:52,377 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:19:52,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:19:52,378 INFO L85 PathProgramCache]: Analyzing trace with hash -1428941089, now seen corresponding path program 1 times [2021-11-20 07:19:52,378 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:19:52,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206862262] [2021-11-20 07:19:52,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:19:52,379 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:19:52,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:52,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-20 07:19:52,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:52,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-20 07:19:52,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:52,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-20 07:19:52,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:52,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-11-20 07:19:52,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:52,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-11-20 07:19:52,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:52,453 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 16 proven. 24 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-20 07:19:52,454 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:19:52,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206862262] [2021-11-20 07:19:52,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206862262] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:19:52,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211215862] [2021-11-20 07:19:52,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:19:52,455 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:19:52,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8326660-80d6-44d8-955d-ddc8cd973646/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:19:52,456 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8326660-80d6-44d8-955d-ddc8cd973646/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:19:52,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8326660-80d6-44d8-955d-ddc8cd973646/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 07:19:52,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:52,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 07:19:52,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:19:52,756 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-20 07:19:52,756 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:19:52,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211215862] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:19:52,757 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:19:52,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-11-20 07:19:52,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387725403] [2021-11-20 07:19:52,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:19:52,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:19:52,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:19:52,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:19:52,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-20 07:19:52,759 INFO L87 Difference]: Start difference. First operand 1061 states and 1387 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-20 07:19:52,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:19:52,833 INFO L93 Difference]: Finished difference Result 1385 states and 1781 transitions. [2021-11-20 07:19:52,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:19:52,834 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 103 [2021-11-20 07:19:52,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:19:52,836 INFO L225 Difference]: With dead ends: 1385 [2021-11-20 07:19:52,837 INFO L226 Difference]: Without dead ends: 260 [2021-11-20 07:19:52,839 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-20 07:19:52,840 INFO L933 BasicCegarLoop]: 537 mSDtfsCounter, 60 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 1005 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:19:52,840 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 1005 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:19:52,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-11-20 07:19:52,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 260. [2021-11-20 07:19:52,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 230 states have (on average 1.5608695652173914) internal successors, (359), 232 states have internal predecessors, (359), 23 states have call successors, (23), 7 states have call predecessors, (23), 6 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-11-20 07:19:52,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 403 transitions. [2021-11-20 07:19:52,858 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 403 transitions. Word has length 103 [2021-11-20 07:19:52,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:19:52,858 INFO L470 AbstractCegarLoop]: Abstraction has 260 states and 403 transitions. [2021-11-20 07:19:52,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-20 07:19:52,859 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 403 transitions. [2021-11-20 07:19:52,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-20 07:19:52,860 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:19:52,861 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:19:52,897 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8326660-80d6-44d8-955d-ddc8cd973646/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-20 07:19:53,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8326660-80d6-44d8-955d-ddc8cd973646/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:19:53,075 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:19:53,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:19:53,076 INFO L85 PathProgramCache]: Analyzing trace with hash 1566264591, now seen corresponding path program 1 times [2021-11-20 07:19:53,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:19:53,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145744455] [2021-11-20 07:19:53,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:19:53,076 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:19:53,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:53,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 07:19:53,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:53,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-20 07:19:53,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:53,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-20 07:19:53,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:53,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-11-20 07:19:53,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:53,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-11-20 07:19:53,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:53,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:19:53,198 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:19:53,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145744455] [2021-11-20 07:19:53,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145744455] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:19:53,198 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:19:53,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 07:19:53,199 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015206852] [2021-11-20 07:19:53,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:19:53,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 07:19:53,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:19:53,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 07:19:53,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:19:53,201 INFO L87 Difference]: Start difference. First operand 260 states and 403 transitions. Second operand has 5 states, 5 states have (on average 22.6) internal successors, (113), 3 states have internal predecessors, (113), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 07:19:54,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:19:54,117 INFO L93 Difference]: Finished difference Result 595 states and 937 transitions. [2021-11-20 07:19:54,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 07:19:54,118 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 3 states have internal predecessors, (113), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 124 [2021-11-20 07:19:54,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:19:54,121 INFO L225 Difference]: With dead ends: 595 [2021-11-20 07:19:54,121 INFO L226 Difference]: Without dead ends: 347 [2021-11-20 07:19:54,122 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 07:19:54,123 INFO L933 BasicCegarLoop]: 439 mSDtfsCounter, 664 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 443 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 683 SdHoareTripleChecker+Valid, 734 SdHoareTripleChecker+Invalid, 497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-20 07:19:54,123 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [683 Valid, 734 Invalid, 497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 443 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-20 07:19:54,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2021-11-20 07:19:54,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 260. [2021-11-20 07:19:54,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 230 states have (on average 1.5565217391304347) internal successors, (358), 232 states have internal predecessors, (358), 23 states have call successors, (23), 7 states have call predecessors, (23), 6 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-11-20 07:19:54,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 402 transitions. [2021-11-20 07:19:54,146 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 402 transitions. Word has length 124 [2021-11-20 07:19:54,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:19:54,146 INFO L470 AbstractCegarLoop]: Abstraction has 260 states and 402 transitions. [2021-11-20 07:19:54,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 3 states have internal predecessors, (113), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 07:19:54,147 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 402 transitions. [2021-11-20 07:19:54,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-20 07:19:54,148 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:19:54,148 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:19:54,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-20 07:19:54,149 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:19:54,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:19:54,149 INFO L85 PathProgramCache]: Analyzing trace with hash -1081339763, now seen corresponding path program 1 times [2021-11-20 07:19:54,150 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:19:54,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033845495] [2021-11-20 07:19:54,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:19:54,150 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:19:54,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:54,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 07:19:54,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:54,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-20 07:19:54,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:54,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-20 07:19:54,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:54,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-11-20 07:19:54,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:54,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-11-20 07:19:54,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:54,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:19:54,286 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:19:54,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033845495] [2021-11-20 07:19:54,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033845495] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:19:54,286 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:19:54,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 07:19:54,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912945404] [2021-11-20 07:19:54,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:19:54,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 07:19:54,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:19:54,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 07:19:54,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-20 07:19:54,288 INFO L87 Difference]: Start difference. First operand 260 states and 402 transitions. Second operand has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 4 states have internal predecessors, (113), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 07:19:56,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:19:56,251 INFO L93 Difference]: Finished difference Result 930 states and 1473 transitions. [2021-11-20 07:19:56,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 07:19:56,251 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 4 states have internal predecessors, (113), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 124 [2021-11-20 07:19:56,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:19:56,257 INFO L225 Difference]: With dead ends: 930 [2021-11-20 07:19:56,257 INFO L226 Difference]: Without dead ends: 686 [2021-11-20 07:19:56,259 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-11-20 07:19:56,260 INFO L933 BasicCegarLoop]: 471 mSDtfsCounter, 994 mSDsluCounter, 717 mSDsCounter, 0 mSdLazyCounter, 1242 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1008 SdHoareTripleChecker+Valid, 1188 SdHoareTripleChecker+Invalid, 1346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 1242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-20 07:19:56,260 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1008 Valid, 1188 Invalid, 1346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 1242 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-11-20 07:19:56,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 686 states. [2021-11-20 07:19:56,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 686 to 511. [2021-11-20 07:19:56,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 511 states, 458 states have (on average 1.5698689956331877) internal successors, (719), 461 states have internal predecessors, (719), 39 states have call successors, (39), 13 states have call predecessors, (39), 13 states have return successors, (40), 37 states have call predecessors, (40), 37 states have call successors, (40) [2021-11-20 07:19:56,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 798 transitions. [2021-11-20 07:19:56,325 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 798 transitions. Word has length 124 [2021-11-20 07:19:56,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:19:56,326 INFO L470 AbstractCegarLoop]: Abstraction has 511 states and 798 transitions. [2021-11-20 07:19:56,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 4 states have internal predecessors, (113), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 07:19:56,327 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 798 transitions. [2021-11-20 07:19:56,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-20 07:19:56,329 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:19:56,329 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:19:56,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-20 07:19:56,330 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:19:56,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:19:56,330 INFO L85 PathProgramCache]: Analyzing trace with hash -2098988151, now seen corresponding path program 1 times [2021-11-20 07:19:56,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:19:56,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788772487] [2021-11-20 07:19:56,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:19:56,331 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:19:56,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:56,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 07:19:56,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:56,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-20 07:19:56,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:56,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-20 07:19:56,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:56,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-11-20 07:19:56,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:56,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-11-20 07:19:56,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:56,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:19:56,474 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:19:56,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788772487] [2021-11-20 07:19:56,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788772487] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:19:56,475 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:19:56,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 07:19:56,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354073362] [2021-11-20 07:19:56,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:19:56,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 07:19:56,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:19:56,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 07:19:56,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-20 07:19:56,478 INFO L87 Difference]: Start difference. First operand 511 states and 798 transitions. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 07:19:58,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:19:58,986 INFO L93 Difference]: Finished difference Result 1528 states and 2422 transitions. [2021-11-20 07:19:58,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-20 07:19:58,987 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 124 [2021-11-20 07:19:58,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:19:59,005 INFO L225 Difference]: With dead ends: 1528 [2021-11-20 07:19:59,005 INFO L226 Difference]: Without dead ends: 1033 [2021-11-20 07:19:59,011 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-11-20 07:19:59,012 INFO L933 BasicCegarLoop]: 674 mSDtfsCounter, 1001 mSDsluCounter, 1371 mSDsCounter, 0 mSdLazyCounter, 1958 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1015 SdHoareTripleChecker+Valid, 2045 SdHoareTripleChecker+Invalid, 2027 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 1958 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:19:59,013 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1015 Valid, 2045 Invalid, 2027 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 1958 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-11-20 07:19:59,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1033 states. [2021-11-20 07:19:59,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1033 to 745. [2021-11-20 07:19:59,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 745 states, 669 states have (on average 1.5635276532137519) internal successors, (1046), 673 states have internal predecessors, (1046), 55 states have call successors, (55), 19 states have call predecessors, (55), 20 states have return successors, (58), 54 states have call predecessors, (58), 53 states have call successors, (58) [2021-11-20 07:19:59,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 745 states to 745 states and 1159 transitions. [2021-11-20 07:19:59,079 INFO L78 Accepts]: Start accepts. Automaton has 745 states and 1159 transitions. Word has length 124 [2021-11-20 07:19:59,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:19:59,080 INFO L470 AbstractCegarLoop]: Abstraction has 745 states and 1159 transitions. [2021-11-20 07:19:59,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 07:19:59,080 INFO L276 IsEmpty]: Start isEmpty. Operand 745 states and 1159 transitions. [2021-11-20 07:19:59,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-20 07:19:59,082 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:19:59,082 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:19:59,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-20 07:19:59,083 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:19:59,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:19:59,083 INFO L85 PathProgramCache]: Analyzing trace with hash -1980546677, now seen corresponding path program 1 times [2021-11-20 07:19:59,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:19:59,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709878009] [2021-11-20 07:19:59,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:19:59,084 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:19:59,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:59,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 07:19:59,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:59,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-20 07:19:59,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:59,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-20 07:19:59,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:59,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-11-20 07:19:59,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:59,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-11-20 07:19:59,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:19:59,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:19:59,230 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:19:59,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709878009] [2021-11-20 07:19:59,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709878009] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:19:59,231 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:19:59,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 07:19:59,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432805496] [2021-11-20 07:19:59,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:19:59,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 07:19:59,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:19:59,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 07:19:59,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-20 07:19:59,234 INFO L87 Difference]: Start difference. First operand 745 states and 1159 transitions. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 07:20:01,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:20:01,546 INFO L93 Difference]: Finished difference Result 2409 states and 3811 transitions. [2021-11-20 07:20:01,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-20 07:20:01,546 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 124 [2021-11-20 07:20:01,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:20:01,565 INFO L225 Difference]: With dead ends: 2409 [2021-11-20 07:20:01,565 INFO L226 Difference]: Without dead ends: 1680 [2021-11-20 07:20:01,572 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-11-20 07:20:01,574 INFO L933 BasicCegarLoop]: 664 mSDtfsCounter, 1001 mSDsluCounter, 1367 mSDsCounter, 0 mSdLazyCounter, 1961 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1015 SdHoareTripleChecker+Valid, 2031 SdHoareTripleChecker+Invalid, 2036 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1961 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-11-20 07:20:01,574 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1015 Valid, 2031 Invalid, 2036 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1961 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-11-20 07:20:01,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1680 states. [2021-11-20 07:20:01,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1680 to 1214. [2021-11-20 07:20:01,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1214 states, 1092 states have (on average 1.5576923076923077) internal successors, (1701), 1098 states have internal predecessors, (1701), 87 states have call successors, (87), 31 states have call predecessors, (87), 34 states have return successors, (98), 88 states have call predecessors, (98), 85 states have call successors, (98) [2021-11-20 07:20:01,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1214 states to 1214 states and 1886 transitions. [2021-11-20 07:20:01,725 INFO L78 Accepts]: Start accepts. Automaton has 1214 states and 1886 transitions. Word has length 124 [2021-11-20 07:20:01,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:20:01,725 INFO L470 AbstractCegarLoop]: Abstraction has 1214 states and 1886 transitions. [2021-11-20 07:20:01,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 07:20:01,726 INFO L276 IsEmpty]: Start isEmpty. Operand 1214 states and 1886 transitions. [2021-11-20 07:20:01,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-20 07:20:01,728 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:20:01,728 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:20:01,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-20 07:20:01,729 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:20:01,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:20:01,730 INFO L85 PathProgramCache]: Analyzing trace with hash -591252663, now seen corresponding path program 1 times [2021-11-20 07:20:01,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:20:01,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214096082] [2021-11-20 07:20:01,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:20:01,730 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:20:01,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:01,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 07:20:01,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:01,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-20 07:20:01,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:01,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-20 07:20:01,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:01,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-11-20 07:20:01,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:01,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-11-20 07:20:01,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:01,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:20:01,880 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:20:01,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214096082] [2021-11-20 07:20:01,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214096082] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:20:01,881 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:20:01,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 07:20:01,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831406999] [2021-11-20 07:20:01,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:20:01,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 07:20:01,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:20:01,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 07:20:01,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-20 07:20:01,884 INFO L87 Difference]: Start difference. First operand 1214 states and 1886 transitions. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 07:20:03,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:20:03,078 INFO L93 Difference]: Finished difference Result 2862 states and 4521 transitions. [2021-11-20 07:20:03,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 07:20:03,079 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 124 [2021-11-20 07:20:03,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:20:03,094 INFO L225 Difference]: With dead ends: 2862 [2021-11-20 07:20:03,094 INFO L226 Difference]: Without dead ends: 1664 [2021-11-20 07:20:03,099 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-20 07:20:03,100 INFO L933 BasicCegarLoop]: 390 mSDtfsCounter, 877 mSDsluCounter, 512 mSDsCounter, 0 mSdLazyCounter, 814 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 892 SdHoareTripleChecker+Valid, 902 SdHoareTripleChecker+Invalid, 917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 814 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-20 07:20:03,100 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [892 Valid, 902 Invalid, 917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 814 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-20 07:20:03,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1664 states. [2021-11-20 07:20:03,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1664 to 1214. [2021-11-20 07:20:03,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1214 states, 1092 states have (on average 1.5531135531135531) internal successors, (1696), 1098 states have internal predecessors, (1696), 87 states have call successors, (87), 31 states have call predecessors, (87), 34 states have return successors, (98), 88 states have call predecessors, (98), 85 states have call successors, (98) [2021-11-20 07:20:03,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1214 states to 1214 states and 1881 transitions. [2021-11-20 07:20:03,269 INFO L78 Accepts]: Start accepts. Automaton has 1214 states and 1881 transitions. Word has length 124 [2021-11-20 07:20:03,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:20:03,269 INFO L470 AbstractCegarLoop]: Abstraction has 1214 states and 1881 transitions. [2021-11-20 07:20:03,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 07:20:03,270 INFO L276 IsEmpty]: Start isEmpty. Operand 1214 states and 1881 transitions. [2021-11-20 07:20:03,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-20 07:20:03,273 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:20:03,273 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:20:03,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-20 07:20:03,273 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:20:03,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:20:03,274 INFO L85 PathProgramCache]: Analyzing trace with hash 1837005959, now seen corresponding path program 1 times [2021-11-20 07:20:03,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:20:03,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527648574] [2021-11-20 07:20:03,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:20:03,275 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:20:03,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:03,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 07:20:03,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:03,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-20 07:20:03,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:03,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-20 07:20:03,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:03,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-11-20 07:20:03,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:03,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-11-20 07:20:03,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:03,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:20:03,432 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:20:03,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527648574] [2021-11-20 07:20:03,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527648574] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:20:03,433 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:20:03,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 07:20:03,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704350237] [2021-11-20 07:20:03,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:20:03,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 07:20:03,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:20:03,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 07:20:03,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-20 07:20:03,435 INFO L87 Difference]: Start difference. First operand 1214 states and 1881 transitions. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 07:20:05,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:20:05,891 INFO L93 Difference]: Finished difference Result 4097 states and 6434 transitions. [2021-11-20 07:20:05,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-20 07:20:05,891 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 124 [2021-11-20 07:20:05,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:20:05,912 INFO L225 Difference]: With dead ends: 4097 [2021-11-20 07:20:05,912 INFO L226 Difference]: Without dead ends: 2899 [2021-11-20 07:20:05,918 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-11-20 07:20:05,919 INFO L933 BasicCegarLoop]: 650 mSDtfsCounter, 989 mSDsluCounter, 1367 mSDsCounter, 0 mSdLazyCounter, 1922 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1003 SdHoareTripleChecker+Valid, 2017 SdHoareTripleChecker+Invalid, 1998 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1922 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-11-20 07:20:05,919 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1003 Valid, 2017 Invalid, 1998 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1922 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-11-20 07:20:05,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2899 states. [2021-11-20 07:20:06,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2899 to 2163. [2021-11-20 07:20:06,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2163 states, 1949 states have (on average 1.5484864032837353) internal successors, (3018), 1959 states have internal predecessors, (3018), 151 states have call successors, (151), 55 states have call predecessors, (151), 62 states have return successors, (184), 156 states have call predecessors, (184), 149 states have call successors, (184) [2021-11-20 07:20:06,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2163 states to 2163 states and 3353 transitions. [2021-11-20 07:20:06,164 INFO L78 Accepts]: Start accepts. Automaton has 2163 states and 3353 transitions. Word has length 124 [2021-11-20 07:20:06,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:20:06,165 INFO L470 AbstractCegarLoop]: Abstraction has 2163 states and 3353 transitions. [2021-11-20 07:20:06,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 07:20:06,165 INFO L276 IsEmpty]: Start isEmpty. Operand 2163 states and 3353 transitions. [2021-11-20 07:20:06,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-20 07:20:06,168 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:20:06,169 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:20:06,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-20 07:20:06,169 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:20:06,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:20:06,170 INFO L85 PathProgramCache]: Analyzing trace with hash 529863561, now seen corresponding path program 1 times [2021-11-20 07:20:06,170 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:20:06,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712706922] [2021-11-20 07:20:06,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:20:06,171 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:20:06,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:06,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 07:20:06,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:06,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-20 07:20:06,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:06,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-20 07:20:06,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:06,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-11-20 07:20:06,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:06,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-11-20 07:20:06,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:06,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:20:06,298 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:20:06,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712706922] [2021-11-20 07:20:06,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712706922] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:20:06,299 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:20:06,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 07:20:06,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050864472] [2021-11-20 07:20:06,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:20:06,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 07:20:06,300 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:20:06,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 07:20:06,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-20 07:20:06,301 INFO L87 Difference]: Start difference. First operand 2163 states and 3353 transitions. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 07:20:07,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:20:07,835 INFO L93 Difference]: Finished difference Result 5052 states and 7944 transitions. [2021-11-20 07:20:07,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 07:20:07,836 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 124 [2021-11-20 07:20:07,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:20:07,859 INFO L225 Difference]: With dead ends: 5052 [2021-11-20 07:20:07,859 INFO L226 Difference]: Without dead ends: 2905 [2021-11-20 07:20:07,867 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-20 07:20:07,868 INFO L933 BasicCegarLoop]: 407 mSDtfsCounter, 723 mSDsluCounter, 652 mSDsCounter, 0 mSdLazyCounter, 930 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 738 SdHoareTripleChecker+Valid, 1059 SdHoareTripleChecker+Invalid, 1009 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 930 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:20:07,868 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [738 Valid, 1059 Invalid, 1009 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 930 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-20 07:20:07,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2905 states. [2021-11-20 07:20:08,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2905 to 2163. [2021-11-20 07:20:08,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2163 states, 1949 states have (on average 1.543868650590046) internal successors, (3009), 1959 states have internal predecessors, (3009), 151 states have call successors, (151), 55 states have call predecessors, (151), 62 states have return successors, (184), 156 states have call predecessors, (184), 149 states have call successors, (184) [2021-11-20 07:20:08,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2163 states to 2163 states and 3344 transitions. [2021-11-20 07:20:08,111 INFO L78 Accepts]: Start accepts. Automaton has 2163 states and 3344 transitions. Word has length 124 [2021-11-20 07:20:08,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:20:08,113 INFO L470 AbstractCegarLoop]: Abstraction has 2163 states and 3344 transitions. [2021-11-20 07:20:08,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 07:20:08,114 INFO L276 IsEmpty]: Start isEmpty. Operand 2163 states and 3344 transitions. [2021-11-20 07:20:08,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-20 07:20:08,117 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:20:08,117 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:20:08,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-20 07:20:08,118 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:20:08,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:20:08,119 INFO L85 PathProgramCache]: Analyzing trace with hash -1867606969, now seen corresponding path program 1 times [2021-11-20 07:20:08,119 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:20:08,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684501974] [2021-11-20 07:20:08,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:20:08,119 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:20:08,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:08,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 07:20:08,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:08,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-20 07:20:08,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:08,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-20 07:20:08,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:08,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-11-20 07:20:08,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:08,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-11-20 07:20:08,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:08,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:20:08,256 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:20:08,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684501974] [2021-11-20 07:20:08,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684501974] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:20:08,257 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:20:08,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 07:20:08,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297299897] [2021-11-20 07:20:08,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:20:08,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 07:20:08,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:20:08,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 07:20:08,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-20 07:20:08,260 INFO L87 Difference]: Start difference. First operand 2163 states and 3344 transitions. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 07:20:10,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:20:10,984 INFO L93 Difference]: Finished difference Result 7486 states and 11700 transitions. [2021-11-20 07:20:10,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-20 07:20:10,984 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 124 [2021-11-20 07:20:10,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:20:11,023 INFO L225 Difference]: With dead ends: 7486 [2021-11-20 07:20:11,024 INFO L226 Difference]: Without dead ends: 5339 [2021-11-20 07:20:11,032 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-11-20 07:20:11,033 INFO L933 BasicCegarLoop]: 639 mSDtfsCounter, 981 mSDsluCounter, 1367 mSDsCounter, 0 mSdLazyCounter, 1895 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 995 SdHoareTripleChecker+Valid, 2006 SdHoareTripleChecker+Invalid, 1971 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1895 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-11-20 07:20:11,033 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [995 Valid, 2006 Invalid, 1971 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1895 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-11-20 07:20:11,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5339 states. [2021-11-20 07:20:11,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5339 to 4073. [2021-11-20 07:20:11,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4073 states, 3675 states have (on average 1.5393197278911566) internal successors, (5657), 3693 states have internal predecessors, (5657), 279 states have call successors, (279), 103 states have call predecessors, (279), 118 states have return successors, (374), 292 states have call predecessors, (374), 277 states have call successors, (374) [2021-11-20 07:20:11,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4073 states to 4073 states and 6310 transitions. [2021-11-20 07:20:11,478 INFO L78 Accepts]: Start accepts. Automaton has 4073 states and 6310 transitions. Word has length 124 [2021-11-20 07:20:11,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:20:11,479 INFO L470 AbstractCegarLoop]: Abstraction has 4073 states and 6310 transitions. [2021-11-20 07:20:11,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 07:20:11,480 INFO L276 IsEmpty]: Start isEmpty. Operand 4073 states and 6310 transitions. [2021-11-20 07:20:11,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-20 07:20:11,485 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:20:11,485 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:20:11,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-20 07:20:11,485 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:20:11,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:20:11,486 INFO L85 PathProgramCache]: Analyzing trace with hash -836566071, now seen corresponding path program 1 times [2021-11-20 07:20:11,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:20:11,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346619404] [2021-11-20 07:20:11,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:20:11,487 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:20:11,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:11,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 07:20:11,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:11,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-20 07:20:11,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:11,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-20 07:20:11,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:11,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-11-20 07:20:11,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:11,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-11-20 07:20:11,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:11,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:20:11,615 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:20:11,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346619404] [2021-11-20 07:20:11,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346619404] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:20:11,615 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:20:11,616 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 07:20:11,616 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752501898] [2021-11-20 07:20:11,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:20:11,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 07:20:11,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:20:11,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 07:20:11,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-20 07:20:11,617 INFO L87 Difference]: Start difference. First operand 4073 states and 6310 transitions. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 07:20:15,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:20:15,100 INFO L93 Difference]: Finished difference Result 15994 states and 24962 transitions. [2021-11-20 07:20:15,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-20 07:20:15,101 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 124 [2021-11-20 07:20:15,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:20:15,175 INFO L225 Difference]: With dead ends: 15994 [2021-11-20 07:20:15,176 INFO L226 Difference]: Without dead ends: 11937 [2021-11-20 07:20:15,194 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-11-20 07:20:15,196 INFO L933 BasicCegarLoop]: 632 mSDtfsCounter, 1271 mSDsluCounter, 1359 mSDsCounter, 0 mSdLazyCounter, 1880 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1293 SdHoareTripleChecker+Valid, 1991 SdHoareTripleChecker+Invalid, 1961 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 1880 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:20:15,196 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1293 Valid, 1991 Invalid, 1961 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 1880 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-11-20 07:20:15,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11937 states. [2021-11-20 07:20:16,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11937 to 7858. [2021-11-20 07:20:16,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7858 states, 7108 states have (on average 1.5389701744513224) internal successors, (10939), 7142 states have internal predecessors, (10939), 519 states have call successors, (519), 199 states have call predecessors, (519), 230 states have return successors, (792), 548 states have call predecessors, (792), 517 states have call successors, (792) [2021-11-20 07:20:16,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7858 states to 7858 states and 12250 transitions. [2021-11-20 07:20:16,215 INFO L78 Accepts]: Start accepts. Automaton has 7858 states and 12250 transitions. Word has length 124 [2021-11-20 07:20:16,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:20:16,216 INFO L470 AbstractCegarLoop]: Abstraction has 7858 states and 12250 transitions. [2021-11-20 07:20:16,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 07:20:16,216 INFO L276 IsEmpty]: Start isEmpty. Operand 7858 states and 12250 transitions. [2021-11-20 07:20:16,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-20 07:20:16,225 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:20:16,225 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:20:16,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-20 07:20:16,226 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:20:16,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:20:16,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1551997959, now seen corresponding path program 1 times [2021-11-20 07:20:16,226 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:20:16,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000554850] [2021-11-20 07:20:16,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:20:16,227 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:20:16,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:16,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 07:20:16,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:16,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-20 07:20:16,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:16,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-20 07:20:16,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:16,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-11-20 07:20:16,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:16,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-11-20 07:20:16,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:16,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:20:16,349 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:20:16,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000554850] [2021-11-20 07:20:16,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000554850] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:20:16,349 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:20:16,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 07:20:16,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420968289] [2021-11-20 07:20:16,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:20:16,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 07:20:16,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:20:16,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 07:20:16,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-20 07:20:16,352 INFO L87 Difference]: Start difference. First operand 7858 states and 12250 transitions. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 07:20:17,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:20:17,931 INFO L93 Difference]: Finished difference Result 18100 states and 28597 transitions. [2021-11-20 07:20:17,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 07:20:17,932 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 124 [2021-11-20 07:20:17,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:20:17,970 INFO L225 Difference]: With dead ends: 18100 [2021-11-20 07:20:17,970 INFO L226 Difference]: Without dead ends: 10258 [2021-11-20 07:20:18,000 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-20 07:20:18,001 INFO L933 BasicCegarLoop]: 397 mSDtfsCounter, 828 mSDsluCounter, 511 mSDsCounter, 0 mSdLazyCounter, 806 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 843 SdHoareTripleChecker+Valid, 908 SdHoareTripleChecker+Invalid, 910 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 806 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-20 07:20:18,001 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [843 Valid, 908 Invalid, 910 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 806 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-20 07:20:18,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10258 states. [2021-11-20 07:20:18,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10258 to 7858. [2021-11-20 07:20:18,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7858 states, 7108 states have (on average 1.5343275182892515) internal successors, (10906), 7142 states have internal predecessors, (10906), 519 states have call successors, (519), 199 states have call predecessors, (519), 230 states have return successors, (792), 548 states have call predecessors, (792), 517 states have call successors, (792) [2021-11-20 07:20:18,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7858 states to 7858 states and 12217 transitions. [2021-11-20 07:20:18,839 INFO L78 Accepts]: Start accepts. Automaton has 7858 states and 12217 transitions. Word has length 124 [2021-11-20 07:20:18,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:20:18,840 INFO L470 AbstractCegarLoop]: Abstraction has 7858 states and 12217 transitions. [2021-11-20 07:20:18,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 07:20:18,840 INFO L276 IsEmpty]: Start isEmpty. Operand 7858 states and 12217 transitions. [2021-11-20 07:20:18,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-20 07:20:18,847 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:20:18,847 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:20:18,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-20 07:20:18,849 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:20:18,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:20:18,850 INFO L85 PathProgramCache]: Analyzing trace with hash -1141898231, now seen corresponding path program 1 times [2021-11-20 07:20:18,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:20:18,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699897072] [2021-11-20 07:20:18,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:20:18,853 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:20:18,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:18,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 07:20:18,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:18,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-20 07:20:18,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:18,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-20 07:20:18,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:19,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-11-20 07:20:19,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:19,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-11-20 07:20:19,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:19,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:20:19,017 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:20:19,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699897072] [2021-11-20 07:20:19,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699897072] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:20:19,018 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:20:19,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 07:20:19,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294203437] [2021-11-20 07:20:19,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:20:19,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 07:20:19,019 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:20:19,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 07:20:19,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-20 07:20:19,020 INFO L87 Difference]: Start difference. First operand 7858 states and 12217 transitions. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 07:20:20,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:20:20,924 INFO L93 Difference]: Finished difference Result 18066 states and 28430 transitions. [2021-11-20 07:20:20,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 07:20:20,924 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 124 [2021-11-20 07:20:20,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:20:20,967 INFO L225 Difference]: With dead ends: 18066 [2021-11-20 07:20:20,967 INFO L226 Difference]: Without dead ends: 10224 [2021-11-20 07:20:20,998 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-20 07:20:20,999 INFO L933 BasicCegarLoop]: 391 mSDtfsCounter, 721 mSDsluCounter, 650 mSDsCounter, 0 mSdLazyCounter, 891 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 736 SdHoareTripleChecker+Valid, 1041 SdHoareTripleChecker+Invalid, 975 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 891 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-20 07:20:21,000 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [736 Valid, 1041 Invalid, 975 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 891 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-20 07:20:21,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10224 states. [2021-11-20 07:20:21,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10224 to 7858. [2021-11-20 07:20:21,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7858 states, 7108 states have (on average 1.5296848621271806) internal successors, (10873), 7142 states have internal predecessors, (10873), 519 states have call successors, (519), 199 states have call predecessors, (519), 230 states have return successors, (792), 548 states have call predecessors, (792), 517 states have call successors, (792) [2021-11-20 07:20:21,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7858 states to 7858 states and 12184 transitions. [2021-11-20 07:20:21,896 INFO L78 Accepts]: Start accepts. Automaton has 7858 states and 12184 transitions. Word has length 124 [2021-11-20 07:20:21,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:20:21,896 INFO L470 AbstractCegarLoop]: Abstraction has 7858 states and 12184 transitions. [2021-11-20 07:20:21,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 07:20:21,897 INFO L276 IsEmpty]: Start isEmpty. Operand 7858 states and 12184 transitions. [2021-11-20 07:20:21,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-20 07:20:21,904 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:20:21,904 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:20:21,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-20 07:20:21,905 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:20:21,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:20:21,905 INFO L85 PathProgramCache]: Analyzing trace with hash 2096337863, now seen corresponding path program 1 times [2021-11-20 07:20:21,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:20:21,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097253994] [2021-11-20 07:20:21,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:20:21,906 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:20:21,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:21,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 07:20:21,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:21,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-20 07:20:21,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:22,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-20 07:20:22,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:22,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-11-20 07:20:22,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:22,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-11-20 07:20:22,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:22,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:20:22,032 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:20:22,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097253994] [2021-11-20 07:20:22,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097253994] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:20:22,033 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:20:22,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 07:20:22,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302238230] [2021-11-20 07:20:22,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:20:22,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 07:20:22,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:20:22,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 07:20:22,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-20 07:20:22,035 INFO L87 Difference]: Start difference. First operand 7858 states and 12184 transitions. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 07:20:23,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:20:23,701 INFO L93 Difference]: Finished difference Result 17998 states and 28195 transitions. [2021-11-20 07:20:23,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 07:20:23,701 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 124 [2021-11-20 07:20:23,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:20:23,738 INFO L225 Difference]: With dead ends: 17998 [2021-11-20 07:20:23,739 INFO L226 Difference]: Without dead ends: 10156 [2021-11-20 07:20:23,755 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-20 07:20:23,756 INFO L933 BasicCegarLoop]: 377 mSDtfsCounter, 839 mSDsluCounter, 510 mSDsCounter, 0 mSdLazyCounter, 770 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 854 SdHoareTripleChecker+Valid, 887 SdHoareTripleChecker+Invalid, 878 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 770 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-20 07:20:23,757 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [854 Valid, 887 Invalid, 878 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 770 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-20 07:20:23,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10156 states. [2021-11-20 07:20:24,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10156 to 7858. [2021-11-20 07:20:24,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7858 states, 7108 states have (on average 1.5250422059651096) internal successors, (10840), 7142 states have internal predecessors, (10840), 519 states have call successors, (519), 199 states have call predecessors, (519), 230 states have return successors, (792), 548 states have call predecessors, (792), 517 states have call successors, (792) [2021-11-20 07:20:24,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7858 states to 7858 states and 12151 transitions. [2021-11-20 07:20:24,677 INFO L78 Accepts]: Start accepts. Automaton has 7858 states and 12151 transitions. Word has length 124 [2021-11-20 07:20:24,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:20:24,678 INFO L470 AbstractCegarLoop]: Abstraction has 7858 states and 12151 transitions. [2021-11-20 07:20:24,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 07:20:24,678 INFO L276 IsEmpty]: Start isEmpty. Operand 7858 states and 12151 transitions. [2021-11-20 07:20:24,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-20 07:20:24,685 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:20:24,685 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:20:24,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-20 07:20:24,686 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:20:24,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:20:24,686 INFO L85 PathProgramCache]: Analyzing trace with hash 477362949, now seen corresponding path program 1 times [2021-11-20 07:20:24,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:20:24,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617428782] [2021-11-20 07:20:24,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:20:24,687 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:20:24,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:24,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 07:20:24,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:24,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-20 07:20:24,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:24,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-20 07:20:24,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:24,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-11-20 07:20:24,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:24,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-11-20 07:20:24,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:24,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:20:24,821 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:20:24,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617428782] [2021-11-20 07:20:24,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617428782] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:20:24,821 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:20:24,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 07:20:24,822 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046641090] [2021-11-20 07:20:24,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:20:24,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 07:20:24,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:20:24,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 07:20:24,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-20 07:20:24,828 INFO L87 Difference]: Start difference. First operand 7858 states and 12151 transitions. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 07:20:28,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:20:28,869 INFO L93 Difference]: Finished difference Result 28873 states and 44988 transitions. [2021-11-20 07:20:28,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-20 07:20:28,869 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 124 [2021-11-20 07:20:28,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:20:28,969 INFO L225 Difference]: With dead ends: 28873 [2021-11-20 07:20:28,969 INFO L226 Difference]: Without dead ends: 21031 [2021-11-20 07:20:28,997 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-11-20 07:20:28,999 INFO L933 BasicCegarLoop]: 603 mSDtfsCounter, 1053 mSDsluCounter, 1359 mSDsCounter, 0 mSdLazyCounter, 1802 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1075 SdHoareTripleChecker+Valid, 1962 SdHoareTripleChecker+Invalid, 1886 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 1802 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-20 07:20:28,999 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1075 Valid, 1962 Invalid, 1886 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 1802 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-11-20 07:20:29,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21031 states. [2021-11-20 07:20:30,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21031 to 15543. [2021-11-20 07:20:30,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15543 states, 14105 states have (on average 1.5235732009925558) internal successors, (21490), 14171 states have internal predecessors, (21490), 983 states have call successors, (983), 391 states have call predecessors, (983), 454 states have return successors, (1774), 1044 states have call predecessors, (1774), 981 states have call successors, (1774) [2021-11-20 07:20:30,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15543 states to 15543 states and 24247 transitions. [2021-11-20 07:20:30,532 INFO L78 Accepts]: Start accepts. Automaton has 15543 states and 24247 transitions. Word has length 124 [2021-11-20 07:20:30,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:20:30,532 INFO L470 AbstractCegarLoop]: Abstraction has 15543 states and 24247 transitions. [2021-11-20 07:20:30,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 07:20:30,533 INFO L276 IsEmpty]: Start isEmpty. Operand 15543 states and 24247 transitions. [2021-11-20 07:20:30,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-20 07:20:30,545 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:20:30,546 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:20:30,546 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-20 07:20:30,546 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:20:30,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:20:30,547 INFO L85 PathProgramCache]: Analyzing trace with hash -406146041, now seen corresponding path program 1 times [2021-11-20 07:20:30,547 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:20:30,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414747161] [2021-11-20 07:20:30,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:20:30,548 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:20:30,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:30,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 07:20:30,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:30,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-20 07:20:30,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:30,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-20 07:20:30,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:30,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-11-20 07:20:30,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:30,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-11-20 07:20:30,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:30,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:20:30,694 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:20:30,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414747161] [2021-11-20 07:20:30,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414747161] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:20:30,695 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:20:30,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 07:20:30,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45659316] [2021-11-20 07:20:30,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:20:30,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 07:20:30,696 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:20:30,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 07:20:30,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-20 07:20:30,697 INFO L87 Difference]: Start difference. First operand 15543 states and 24247 transitions. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 07:20:36,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:20:36,061 INFO L93 Difference]: Finished difference Result 56012 states and 88138 transitions. [2021-11-20 07:20:36,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-20 07:20:36,062 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 124 [2021-11-20 07:20:36,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:20:36,213 INFO L225 Difference]: With dead ends: 56012 [2021-11-20 07:20:36,213 INFO L226 Difference]: Without dead ends: 40485 [2021-11-20 07:20:36,255 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-11-20 07:20:36,256 INFO L933 BasicCegarLoop]: 626 mSDtfsCounter, 969 mSDsluCounter, 1359 mSDsCounter, 0 mSdLazyCounter, 1943 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 982 SdHoareTripleChecker+Valid, 1985 SdHoareTripleChecker+Invalid, 2024 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 1943 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-20 07:20:36,256 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [982 Valid, 1985 Invalid, 2024 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 1943 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-11-20 07:20:36,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40485 states. [2021-11-20 07:20:39,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40485 to 30872. [2021-11-20 07:20:39,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30872 states, 28090 states have (on average 1.523816304734781) internal successors, (42804), 28220 states have internal predecessors, (42804), 1879 states have call successors, (1879), 775 states have call predecessors, (1879), 902 states have return successors, (4192), 2004 states have call predecessors, (4192), 1877 states have call successors, (4192) [2021-11-20 07:20:39,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30872 states to 30872 states and 48875 transitions. [2021-11-20 07:20:39,324 INFO L78 Accepts]: Start accepts. Automaton has 30872 states and 48875 transitions. Word has length 124 [2021-11-20 07:20:39,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:20:39,325 INFO L470 AbstractCegarLoop]: Abstraction has 30872 states and 48875 transitions. [2021-11-20 07:20:39,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 07:20:39,325 INFO L276 IsEmpty]: Start isEmpty. Operand 30872 states and 48875 transitions. [2021-11-20 07:20:39,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-20 07:20:39,347 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:20:39,347 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:20:39,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-20 07:20:39,347 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:20:39,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:20:39,348 INFO L85 PathProgramCache]: Analyzing trace with hash -434646331, now seen corresponding path program 1 times [2021-11-20 07:20:39,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:20:39,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583323918] [2021-11-20 07:20:39,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:20:39,349 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:20:39,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:39,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 07:20:39,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:39,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-20 07:20:39,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:39,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-20 07:20:39,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:39,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-11-20 07:20:39,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:39,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-11-20 07:20:39,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:39,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:20:39,461 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:20:39,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583323918] [2021-11-20 07:20:39,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583323918] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:20:39,461 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:20:39,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 07:20:39,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265683475] [2021-11-20 07:20:39,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:20:39,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 07:20:39,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:20:39,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 07:20:39,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-20 07:20:39,464 INFO L87 Difference]: Start difference. First operand 30872 states and 48875 transitions. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 07:20:48,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:20:48,032 INFO L93 Difference]: Finished difference Result 109099 states and 174480 transitions. [2021-11-20 07:20:48,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-20 07:20:48,032 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 124 [2021-11-20 07:20:48,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:20:48,303 INFO L225 Difference]: With dead ends: 109099 [2021-11-20 07:20:48,303 INFO L226 Difference]: Without dead ends: 78243 [2021-11-20 07:20:48,384 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-11-20 07:20:48,385 INFO L933 BasicCegarLoop]: 594 mSDtfsCounter, 973 mSDsluCounter, 1359 mSDsCounter, 0 mSdLazyCounter, 1783 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 995 SdHoareTripleChecker+Valid, 1953 SdHoareTripleChecker+Invalid, 1865 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 1783 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-20 07:20:48,388 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [995 Valid, 1953 Invalid, 1865 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 1783 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-20 07:20:48,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78243 states. [2021-11-20 07:20:54,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78243 to 61465. [2021-11-20 07:20:54,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61465 states, 56059 states have (on average 1.5250717993542517) internal successors, (85494), 56317 states have internal predecessors, (85494), 3607 states have call successors, (3607), 1543 states have call predecessors, (3607), 1798 states have return successors, (10422), 3860 states have call predecessors, (10422), 3605 states have call successors, (10422) [2021-11-20 07:20:55,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61465 states to 61465 states and 99523 transitions. [2021-11-20 07:20:55,142 INFO L78 Accepts]: Start accepts. Automaton has 61465 states and 99523 transitions. Word has length 124 [2021-11-20 07:20:55,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:20:55,142 INFO L470 AbstractCegarLoop]: Abstraction has 61465 states and 99523 transitions. [2021-11-20 07:20:55,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 07:20:55,142 INFO L276 IsEmpty]: Start isEmpty. Operand 61465 states and 99523 transitions. [2021-11-20 07:20:55,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-20 07:20:55,177 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:20:55,177 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:20:55,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-20 07:20:55,178 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:20:55,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:20:55,178 INFO L85 PathProgramCache]: Analyzing trace with hash 1919738951, now seen corresponding path program 1 times [2021-11-20 07:20:55,179 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:20:55,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031369965] [2021-11-20 07:20:55,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:20:55,179 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:20:55,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:55,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 07:20:55,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:55,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-20 07:20:55,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:55,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-20 07:20:55,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:55,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-11-20 07:20:55,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:55,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-11-20 07:20:55,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:55,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:20:55,294 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:20:55,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031369965] [2021-11-20 07:20:55,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031369965] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:20:55,295 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:20:55,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 07:20:55,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399295436] [2021-11-20 07:20:55,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:20:55,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 07:20:55,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:20:55,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 07:20:55,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-20 07:20:55,298 INFO L87 Difference]: Start difference. First operand 61465 states and 99523 transitions. Second operand has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 4 states have internal predecessors, (113), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5)