./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.08.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c1be151-967f-4d07-9060-7888b16b3816/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c1be151-967f-4d07-9060-7888b16b3816/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c1be151-967f-4d07-9060-7888b16b3816/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c1be151-967f-4d07-9060-7888b16b3816/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.08.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c1be151-967f-4d07-9060-7888b16b3816/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c1be151-967f-4d07-9060-7888b16b3816/bin/uautomizer-DrprNOufMa --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash dfe43dac9acec5d21450031b4b25696c02a17019cbc94a74a969e06371e0741b --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 23:07:24,449 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 23:07:24,451 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 23:07:24,483 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 23:07:24,484 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 23:07:24,485 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 23:07:24,486 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 23:07:24,488 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 23:07:24,489 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 23:07:24,490 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 23:07:24,491 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 23:07:24,497 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 23:07:24,497 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 23:07:24,498 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 23:07:24,499 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 23:07:24,500 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 23:07:24,501 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 23:07:24,502 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 23:07:24,503 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 23:07:24,505 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 23:07:24,506 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 23:07:24,508 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 23:07:24,509 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 23:07:24,509 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 23:07:24,512 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 23:07:24,512 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 23:07:24,512 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 23:07:24,513 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 23:07:24,514 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 23:07:24,514 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 23:07:24,515 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 23:07:24,515 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 23:07:24,516 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 23:07:24,516 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 23:07:24,517 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 23:07:24,517 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 23:07:24,518 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 23:07:24,518 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 23:07:24,518 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 23:07:24,519 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 23:07:24,519 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 23:07:24,520 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c1be151-967f-4d07-9060-7888b16b3816/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 23:07:24,536 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 23:07:24,536 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 23:07:24,536 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 23:07:24,537 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 23:07:24,537 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 23:07:24,537 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 23:07:24,538 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 23:07:24,538 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 23:07:24,538 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 23:07:24,538 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 23:07:24,538 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 23:07:24,538 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 23:07:24,538 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 23:07:24,538 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 23:07:24,539 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 23:07:24,539 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 23:07:24,539 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 23:07:24,539 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 23:07:24,539 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 23:07:24,539 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 23:07:24,539 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 23:07:24,539 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 23:07:24,539 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 23:07:24,540 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 23:07:24,540 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 23:07:24,540 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 23:07:24,540 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 23:07:24,540 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 23:07:24,540 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 23:07:24,540 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 23:07:24,540 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 23:07:24,540 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 23:07:24,541 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 23:07:24,541 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 23:07:24,541 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_8c1be151-967f-4d07-9060-7888b16b3816/bin/uautomizer-DrprNOufMa/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c1be151-967f-4d07-9060-7888b16b3816/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dfe43dac9acec5d21450031b4b25696c02a17019cbc94a74a969e06371e0741b [2021-12-06 23:07:24,700 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 23:07:24,715 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 23:07:24,717 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 23:07:24,717 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 23:07:24,718 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 23:07:24,719 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c1be151-967f-4d07-9060-7888b16b3816/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.08.cil-2.c [2021-12-06 23:07:24,766 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c1be151-967f-4d07-9060-7888b16b3816/bin/uautomizer-DrprNOufMa/data/56b2a731c/b3fcff8fc49742348a80864845a2bb61/FLAG2017b53e3 [2021-12-06 23:07:25,226 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 23:07:25,227 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c1be151-967f-4d07-9060-7888b16b3816/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.08.cil-2.c [2021-12-06 23:07:25,237 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c1be151-967f-4d07-9060-7888b16b3816/bin/uautomizer-DrprNOufMa/data/56b2a731c/b3fcff8fc49742348a80864845a2bb61/FLAG2017b53e3 [2021-12-06 23:07:25,250 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c1be151-967f-4d07-9060-7888b16b3816/bin/uautomizer-DrprNOufMa/data/56b2a731c/b3fcff8fc49742348a80864845a2bb61 [2021-12-06 23:07:25,252 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 23:07:25,253 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 23:07:25,255 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 23:07:25,255 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 23:07:25,258 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 23:07:25,259 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 11:07:25" (1/1) ... [2021-12-06 23:07:25,260 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50caaa19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:07:25, skipping insertion in model container [2021-12-06 23:07:25,260 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 11:07:25" (1/1) ... [2021-12-06 23:07:25,267 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 23:07:25,306 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 23:07:25,405 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_8c1be151-967f-4d07-9060-7888b16b3816/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.08.cil-2.c[914,927] [2021-12-06 23:07:25,440 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_8c1be151-967f-4d07-9060-7888b16b3816/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.08.cil-2.c[7115,7128] [2021-12-06 23:07:25,495 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 23:07:25,503 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 23:07:25,511 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_8c1be151-967f-4d07-9060-7888b16b3816/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.08.cil-2.c[914,927] [2021-12-06 23:07:25,525 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_8c1be151-967f-4d07-9060-7888b16b3816/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.08.cil-2.c[7115,7128] [2021-12-06 23:07:25,559 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 23:07:25,576 INFO L208 MainTranslator]: Completed translation [2021-12-06 23:07:25,577 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:07:25 WrapperNode [2021-12-06 23:07:25,577 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 23:07:25,577 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 23:07:25,578 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 23:07:25,578 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 23:07:25,583 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:07:25" (1/1) ... [2021-12-06 23:07:25,593 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:07:25" (1/1) ... [2021-12-06 23:07:25,626 INFO L137 Inliner]: procedures = 69, calls = 82, calls flagged for inlining = 37, calls inlined = 37, statements flattened = 813 [2021-12-06 23:07:25,627 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 23:07:25,627 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 23:07:25,627 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 23:07:25,627 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 23:07:25,634 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:07:25" (1/1) ... [2021-12-06 23:07:25,634 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:07:25" (1/1) ... [2021-12-06 23:07:25,637 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:07:25" (1/1) ... [2021-12-06 23:07:25,638 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:07:25" (1/1) ... [2021-12-06 23:07:25,648 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:07:25" (1/1) ... [2021-12-06 23:07:25,659 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:07:25" (1/1) ... [2021-12-06 23:07:25,662 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:07:25" (1/1) ... [2021-12-06 23:07:25,666 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 23:07:25,667 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 23:07:25,667 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 23:07:25,667 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 23:07:25,668 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:07:25" (1/1) ... [2021-12-06 23:07:25,674 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 23:07:25,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c1be151-967f-4d07-9060-7888b16b3816/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:07:25,692 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c1be151-967f-4d07-9060-7888b16b3816/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 23:07:25,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c1be151-967f-4d07-9060-7888b16b3816/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 23:07:25,720 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 23:07:25,720 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-06 23:07:25,720 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-06 23:07:25,720 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2021-12-06 23:07:25,720 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2021-12-06 23:07:25,720 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2021-12-06 23:07:25,720 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2021-12-06 23:07:25,720 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2021-12-06 23:07:25,721 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2021-12-06 23:07:25,721 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2021-12-06 23:07:25,721 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2021-12-06 23:07:25,721 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2021-12-06 23:07:25,721 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2021-12-06 23:07:25,721 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2021-12-06 23:07:25,721 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2021-12-06 23:07:25,721 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2021-12-06 23:07:25,721 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2021-12-06 23:07:25,721 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2021-12-06 23:07:25,721 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2021-12-06 23:07:25,721 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2021-12-06 23:07:25,722 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2021-12-06 23:07:25,722 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2021-12-06 23:07:25,722 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2021-12-06 23:07:25,722 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 23:07:25,722 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2021-12-06 23:07:25,722 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2021-12-06 23:07:25,722 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2021-12-06 23:07:25,722 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2021-12-06 23:07:25,722 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 23:07:25,722 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 23:07:25,722 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2021-12-06 23:07:25,722 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2021-12-06 23:07:25,722 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2021-12-06 23:07:25,723 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2021-12-06 23:07:25,800 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 23:07:25,802 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 23:07:26,246 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 23:07:26,254 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 23:07:26,254 INFO L301 CfgBuilder]: Removed 15 assume(true) statements. [2021-12-06 23:07:26,256 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 11:07:26 BoogieIcfgContainer [2021-12-06 23:07:26,256 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 23:07:26,257 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 23:07:26,257 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 23:07:26,260 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 23:07:26,260 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 11:07:25" (1/3) ... [2021-12-06 23:07:26,260 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56a51dd3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 11:07:26, skipping insertion in model container [2021-12-06 23:07:26,261 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:07:25" (2/3) ... [2021-12-06 23:07:26,261 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56a51dd3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 11:07:26, skipping insertion in model container [2021-12-06 23:07:26,261 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 11:07:26" (3/3) ... [2021-12-06 23:07:26,262 INFO L111 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-1+token_ring.08.cil-2.c [2021-12-06 23:07:26,266 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 23:07:26,266 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-06 23:07:26,304 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 23:07:26,309 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-06 23:07:26,309 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-06 23:07:26,331 INFO L276 IsEmpty]: Start isEmpty. Operand has 391 states, 335 states have (on average 1.626865671641791) internal successors, (545), 343 states have internal predecessors, (545), 38 states have call successors, (38), 15 states have call predecessors, (38), 15 states have return successors, (38), 36 states have call predecessors, (38), 38 states have call successors, (38) [2021-12-06 23:07:26,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-06 23:07:26,340 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:07:26,341 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] [2021-12-06 23:07:26,342 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:07:26,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:07:26,347 INFO L85 PathProgramCache]: Analyzing trace with hash 2101552932, now seen corresponding path program 1 times [2021-12-06 23:07:26,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:07:26,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983902544] [2021-12-06 23:07:26,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:07:26,355 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:07:26,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:26,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 23:07:26,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:26,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 23:07:26,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:26,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-06 23:07:26,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:26,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:07:26,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:26,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 23:07:26,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:26,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 23:07:26,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:26,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-06 23:07:26,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:26,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:07:26,596 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:07:26,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983902544] [2021-12-06 23:07:26,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983902544] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:07:26,597 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:07:26,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-06 23:07:26,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599849000] [2021-12-06 23:07:26,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:07:26,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 23:07:26,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:07:26,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 23:07:26,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-06 23:07:26,624 INFO L87 Difference]: Start difference. First operand has 391 states, 335 states have (on average 1.626865671641791) internal successors, (545), 343 states have internal predecessors, (545), 38 states have call successors, (38), 15 states have call predecessors, (38), 15 states have return successors, (38), 36 states have call predecessors, (38), 38 states have call successors, (38) Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-06 23:07:27,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:07:27,341 INFO L93 Difference]: Finished difference Result 892 states and 1408 transitions. [2021-12-06 23:07:27,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 23:07:27,343 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 65 [2021-12-06 23:07:27,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:07:27,359 INFO L225 Difference]: With dead ends: 892 [2021-12-06 23:07:27,359 INFO L226 Difference]: Without dead ends: 515 [2021-12-06 23:07:27,365 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-12-06 23:07:27,369 INFO L933 BasicCegarLoop]: 591 mSDtfsCounter, 1227 mSDsluCounter, 1151 mSDsCounter, 0 mSdLazyCounter, 813 mSolverCounterSat, 244 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1232 SdHoareTripleChecker+Valid, 1742 SdHoareTripleChecker+Invalid, 1057 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 244 IncrementalHoareTripleChecker+Valid, 813 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 23:07:27,370 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1232 Valid, 1742 Invalid, 1057 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [244 Valid, 813 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 23:07:27,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2021-12-06 23:07:27,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 476. [2021-12-06 23:07:27,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 403 states have (on average 1.5086848635235732) internal successors, (608), 410 states have internal predecessors, (608), 49 states have call successors, (49), 22 states have call predecessors, (49), 22 states have return successors, (50), 46 states have call predecessors, (50), 45 states have call successors, (50) [2021-12-06 23:07:27,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 707 transitions. [2021-12-06 23:07:27,462 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 707 transitions. Word has length 65 [2021-12-06 23:07:27,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:07:27,463 INFO L470 AbstractCegarLoop]: Abstraction has 476 states and 707 transitions. [2021-12-06 23:07:27,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-06 23:07:27,463 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 707 transitions. [2021-12-06 23:07:27,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-06 23:07:27,468 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:07:27,468 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] [2021-12-06 23:07:27,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 23:07:27,468 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:07:27,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:07:27,469 INFO L85 PathProgramCache]: Analyzing trace with hash -1789628413, now seen corresponding path program 1 times [2021-12-06 23:07:27,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:07:27,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298132357] [2021-12-06 23:07:27,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:07:27,470 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:07:27,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:27,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 23:07:27,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:27,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 23:07:27,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:27,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-06 23:07:27,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:27,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:07:27,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:27,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 23:07:27,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:27,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 23:07:27,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:27,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-06 23:07:27,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:27,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:07:27,581 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:07:27,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298132357] [2021-12-06 23:07:27,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298132357] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:07:27,581 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:07:27,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-06 23:07:27,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677912296] [2021-12-06 23:07:27,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:07:27,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 23:07:27,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:07:27,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 23:07:27,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-06 23:07:27,583 INFO L87 Difference]: Start difference. First operand 476 states and 707 transitions. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-06 23:07:28,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:07:28,240 INFO L93 Difference]: Finished difference Result 823 states and 1184 transitions. [2021-12-06 23:07:28,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-06 23:07:28,241 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 65 [2021-12-06 23:07:28,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:07:28,246 INFO L225 Difference]: With dead ends: 823 [2021-12-06 23:07:28,246 INFO L226 Difference]: Without dead ends: 646 [2021-12-06 23:07:28,247 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-12-06 23:07:28,248 INFO L933 BasicCegarLoop]: 624 mSDtfsCounter, 1155 mSDsluCounter, 1632 mSDsCounter, 0 mSdLazyCounter, 1115 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1182 SdHoareTripleChecker+Valid, 2256 SdHoareTripleChecker+Invalid, 1253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 1115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 23:07:28,248 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1182 Valid, 2256 Invalid, 1253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 1115 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 23:07:28,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states. [2021-12-06 23:07:28,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 572. [2021-12-06 23:07:28,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 572 states, 479 states have (on average 1.4864300626304803) internal successors, (712), 488 states have internal predecessors, (712), 60 states have call successors, (60), 29 states have call predecessors, (60), 31 states have return successors, (69), 58 states have call predecessors, (69), 56 states have call successors, (69) [2021-12-06 23:07:28,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 841 transitions. [2021-12-06 23:07:28,295 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 841 transitions. Word has length 65 [2021-12-06 23:07:28,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:07:28,295 INFO L470 AbstractCegarLoop]: Abstraction has 572 states and 841 transitions. [2021-12-06 23:07:28,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-06 23:07:28,295 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 841 transitions. [2021-12-06 23:07:28,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-06 23:07:28,298 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:07:28,298 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] [2021-12-06 23:07:28,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 23:07:28,298 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:07:28,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:07:28,299 INFO L85 PathProgramCache]: Analyzing trace with hash 476752773, now seen corresponding path program 1 times [2021-12-06 23:07:28,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:07:28,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603762779] [2021-12-06 23:07:28,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:07:28,299 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:07:28,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:28,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 23:07:28,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:28,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 23:07:28,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:28,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-06 23:07:28,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:28,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:07:28,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:28,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 23:07:28,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:28,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 23:07:28,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:28,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-06 23:07:28,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:28,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:07:28,404 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:07:28,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603762779] [2021-12-06 23:07:28,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603762779] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:07:28,405 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:07:28,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-06 23:07:28,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529412768] [2021-12-06 23:07:28,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:07:28,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 23:07:28,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:07:28,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 23:07:28,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-06 23:07:28,406 INFO L87 Difference]: Start difference. First operand 572 states and 841 transitions. Second operand has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-06 23:07:29,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:07:29,012 INFO L93 Difference]: Finished difference Result 873 states and 1255 transitions. [2021-12-06 23:07:29,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-06 23:07:29,013 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 65 [2021-12-06 23:07:29,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:07:29,016 INFO L225 Difference]: With dead ends: 873 [2021-12-06 23:07:29,017 INFO L226 Difference]: Without dead ends: 606 [2021-12-06 23:07:29,017 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-06 23:07:29,018 INFO L933 BasicCegarLoop]: 563 mSDtfsCounter, 731 mSDsluCounter, 1864 mSDsCounter, 0 mSdLazyCounter, 1132 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 732 SdHoareTripleChecker+Valid, 2427 SdHoareTripleChecker+Invalid, 1267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 1132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 23:07:29,019 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [732 Valid, 2427 Invalid, 1267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 1132 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 23:07:29,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2021-12-06 23:07:29,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 577. [2021-12-06 23:07:29,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 483 states have (on average 1.4782608695652173) internal successors, (714), 492 states have internal predecessors, (714), 60 states have call successors, (60), 29 states have call predecessors, (60), 32 states have return successors, (70), 59 states have call predecessors, (70), 56 states have call successors, (70) [2021-12-06 23:07:29,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 844 transitions. [2021-12-06 23:07:29,048 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 844 transitions. Word has length 65 [2021-12-06 23:07:29,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:07:29,048 INFO L470 AbstractCegarLoop]: Abstraction has 577 states and 844 transitions. [2021-12-06 23:07:29,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-06 23:07:29,048 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 844 transitions. [2021-12-06 23:07:29,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-06 23:07:29,050 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:07:29,050 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] [2021-12-06 23:07:29,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-06 23:07:29,050 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:07:29,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:07:29,051 INFO L85 PathProgramCache]: Analyzing trace with hash -552606525, now seen corresponding path program 1 times [2021-12-06 23:07:29,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:07:29,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023655458] [2021-12-06 23:07:29,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:07:29,051 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:07:29,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:29,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 23:07:29,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:29,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 23:07:29,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:29,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-06 23:07:29,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:29,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:07:29,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:29,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 23:07:29,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:29,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 23:07:29,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:29,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-06 23:07:29,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:29,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:07:29,161 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:07:29,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023655458] [2021-12-06 23:07:29,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023655458] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:07:29,161 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:07:29,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-06 23:07:29,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626130750] [2021-12-06 23:07:29,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:07:29,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 23:07:29,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:07:29,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 23:07:29,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-06 23:07:29,163 INFO L87 Difference]: Start difference. First operand 577 states and 844 transitions. Second operand has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 6 states have internal predecessors, (50), 4 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-06 23:07:30,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:07:30,351 INFO L93 Difference]: Finished difference Result 2239 states and 3116 transitions. [2021-12-06 23:07:30,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-06 23:07:30,352 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 6 states have internal predecessors, (50), 4 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 65 [2021-12-06 23:07:30,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:07:30,361 INFO L225 Difference]: With dead ends: 2239 [2021-12-06 23:07:30,361 INFO L226 Difference]: Without dead ends: 1967 [2021-12-06 23:07:30,362 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=235, Invalid=887, Unknown=0, NotChecked=0, Total=1122 [2021-12-06 23:07:30,363 INFO L933 BasicCegarLoop]: 788 mSDtfsCounter, 2513 mSDsluCounter, 1417 mSDsCounter, 0 mSdLazyCounter, 1346 mSolverCounterSat, 563 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2531 SdHoareTripleChecker+Valid, 2205 SdHoareTripleChecker+Invalid, 1909 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 563 IncrementalHoareTripleChecker+Valid, 1346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-06 23:07:30,364 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2531 Valid, 2205 Invalid, 1909 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [563 Valid, 1346 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-06 23:07:30,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1967 states. [2021-12-06 23:07:30,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1967 to 1717. [2021-12-06 23:07:30,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1717 states, 1383 states have (on average 1.3702096890817064) internal successors, (1895), 1412 states have internal predecessors, (1895), 177 states have call successors, (177), 131 states have call predecessors, (177), 155 states have return successors, (256), 177 states have call predecessors, (256), 173 states have call successors, (256) [2021-12-06 23:07:30,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1717 states to 1717 states and 2328 transitions. [2021-12-06 23:07:30,441 INFO L78 Accepts]: Start accepts. Automaton has 1717 states and 2328 transitions. Word has length 65 [2021-12-06 23:07:30,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:07:30,441 INFO L470 AbstractCegarLoop]: Abstraction has 1717 states and 2328 transitions. [2021-12-06 23:07:30,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 6 states have internal predecessors, (50), 4 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-06 23:07:30,441 INFO L276 IsEmpty]: Start isEmpty. Operand 1717 states and 2328 transitions. [2021-12-06 23:07:30,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-06 23:07:30,442 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:07:30,443 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:07:30,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-06 23:07:30,443 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:07:30,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:07:30,443 INFO L85 PathProgramCache]: Analyzing trace with hash 498842564, now seen corresponding path program 1 times [2021-12-06 23:07:30,443 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:07:30,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271551872] [2021-12-06 23:07:30,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:07:30,444 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:07:30,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:30,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 23:07:30,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:30,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 23:07:30,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:30,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-06 23:07:30,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:30,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:07:30,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:30,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 23:07:30,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:30,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 23:07:30,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:30,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-06 23:07:30,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:30,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:07:30,539 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:07:30,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271551872] [2021-12-06 23:07:30,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271551872] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:07:30,540 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:07:30,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-06 23:07:30,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333162886] [2021-12-06 23:07:30,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:07:30,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 23:07:30,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:07:30,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 23:07:30,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-06 23:07:30,541 INFO L87 Difference]: Start difference. First operand 1717 states and 2328 transitions. Second operand has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-06 23:07:31,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:07:31,225 INFO L93 Difference]: Finished difference Result 3318 states and 4452 transitions. [2021-12-06 23:07:31,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-06 23:07:31,225 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 65 [2021-12-06 23:07:31,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:07:31,237 INFO L225 Difference]: With dead ends: 3318 [2021-12-06 23:07:31,238 INFO L226 Difference]: Without dead ends: 1906 [2021-12-06 23:07:31,242 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-12-06 23:07:31,243 INFO L933 BasicCegarLoop]: 561 mSDtfsCounter, 490 mSDsluCounter, 2121 mSDsCounter, 0 mSdLazyCounter, 1189 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 491 SdHoareTripleChecker+Valid, 2682 SdHoareTripleChecker+Invalid, 1281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 1189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 23:07:31,243 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [491 Valid, 2682 Invalid, 1281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 1189 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 23:07:31,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1906 states. [2021-12-06 23:07:31,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1906 to 1762. [2021-12-06 23:07:31,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1762 states, 1419 states have (on average 1.354474982381959) internal successors, (1922), 1448 states have internal predecessors, (1922), 177 states have call successors, (177), 131 states have call predecessors, (177), 164 states have return successors, (268), 186 states have call predecessors, (268), 173 states have call successors, (268) [2021-12-06 23:07:31,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1762 states to 1762 states and 2367 transitions. [2021-12-06 23:07:31,330 INFO L78 Accepts]: Start accepts. Automaton has 1762 states and 2367 transitions. Word has length 65 [2021-12-06 23:07:31,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:07:31,330 INFO L470 AbstractCegarLoop]: Abstraction has 1762 states and 2367 transitions. [2021-12-06 23:07:31,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-06 23:07:31,331 INFO L276 IsEmpty]: Start isEmpty. Operand 1762 states and 2367 transitions. [2021-12-06 23:07:31,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-06 23:07:31,332 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:07:31,332 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] [2021-12-06 23:07:31,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-06 23:07:31,332 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:07:31,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:07:31,333 INFO L85 PathProgramCache]: Analyzing trace with hash 1885045958, now seen corresponding path program 1 times [2021-12-06 23:07:31,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:07:31,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682014547] [2021-12-06 23:07:31,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:07:31,333 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:07:31,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:31,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 23:07:31,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:31,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 23:07:31,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:31,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-06 23:07:31,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:31,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:07:31,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:31,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 23:07:31,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:31,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 23:07:31,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:31,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-06 23:07:31,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:31,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:07:31,417 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:07:31,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682014547] [2021-12-06 23:07:31,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682014547] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:07:31,418 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:07:31,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-06 23:07:31,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611485114] [2021-12-06 23:07:31,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:07:31,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 23:07:31,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:07:31,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 23:07:31,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-06 23:07:31,420 INFO L87 Difference]: Start difference. First operand 1762 states and 2367 transitions. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-06 23:07:32,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:07:32,033 INFO L93 Difference]: Finished difference Result 3197 states and 4206 transitions. [2021-12-06 23:07:32,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-06 23:07:32,034 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 65 [2021-12-06 23:07:32,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:07:32,042 INFO L225 Difference]: With dead ends: 3197 [2021-12-06 23:07:32,043 INFO L226 Difference]: Without dead ends: 1960 [2021-12-06 23:07:32,045 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2021-12-06 23:07:32,046 INFO L933 BasicCegarLoop]: 573 mSDtfsCounter, 1131 mSDsluCounter, 1405 mSDsCounter, 0 mSdLazyCounter, 1066 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1156 SdHoareTripleChecker+Valid, 1978 SdHoareTripleChecker+Invalid, 1216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 1066 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 23:07:32,047 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1156 Valid, 1978 Invalid, 1216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 1066 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 23:07:32,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1960 states. [2021-12-06 23:07:32,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1960 to 1740. [2021-12-06 23:07:32,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1740 states, 1405 states have (on average 1.3508896797153025) internal successors, (1898), 1428 states have internal predecessors, (1898), 177 states have call successors, (177), 131 states have call predecessors, (177), 156 states have return successors, (252), 184 states have call predecessors, (252), 173 states have call successors, (252) [2021-12-06 23:07:32,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1740 states to 1740 states and 2327 transitions. [2021-12-06 23:07:32,116 INFO L78 Accepts]: Start accepts. Automaton has 1740 states and 2327 transitions. Word has length 65 [2021-12-06 23:07:32,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:07:32,116 INFO L470 AbstractCegarLoop]: Abstraction has 1740 states and 2327 transitions. [2021-12-06 23:07:32,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-06 23:07:32,116 INFO L276 IsEmpty]: Start isEmpty. Operand 1740 states and 2327 transitions. [2021-12-06 23:07:32,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-06 23:07:32,118 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:07:32,118 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] [2021-12-06 23:07:32,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-06 23:07:32,119 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:07:32,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:07:32,119 INFO L85 PathProgramCache]: Analyzing trace with hash 1751032452, now seen corresponding path program 1 times [2021-12-06 23:07:32,119 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:07:32,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882621427] [2021-12-06 23:07:32,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:07:32,119 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:07:32,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:32,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 23:07:32,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:32,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 23:07:32,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:32,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-06 23:07:32,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:32,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:07:32,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:32,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 23:07:32,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:32,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 23:07:32,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:32,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-06 23:07:32,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:32,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:07:32,197 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:07:32,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882621427] [2021-12-06 23:07:32,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882621427] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:07:32,197 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:07:32,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 23:07:32,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895190843] [2021-12-06 23:07:32,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:07:32,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 23:07:32,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:07:32,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 23:07:32,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-06 23:07:32,205 INFO L87 Difference]: Start difference. First operand 1740 states and 2327 transitions. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-06 23:07:32,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:07:32,567 INFO L93 Difference]: Finished difference Result 4815 states and 6306 transitions. [2021-12-06 23:07:32,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-06 23:07:32,567 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 65 [2021-12-06 23:07:32,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:07:32,582 INFO L225 Difference]: With dead ends: 4815 [2021-12-06 23:07:32,582 INFO L226 Difference]: Without dead ends: 3383 [2021-12-06 23:07:32,585 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-12-06 23:07:32,586 INFO L933 BasicCegarLoop]: 544 mSDtfsCounter, 1650 mSDsluCounter, 577 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 247 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1681 SdHoareTripleChecker+Valid, 1121 SdHoareTripleChecker+Invalid, 503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 247 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 23:07:32,586 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1681 Valid, 1121 Invalid, 503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [247 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 23:07:32,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3383 states. [2021-12-06 23:07:32,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3383 to 3111. [2021-12-06 23:07:32,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3111 states, 2471 states have (on average 1.301092675030352) internal successors, (3215), 2515 states have internal predecessors, (3215), 329 states have call successors, (329), 254 states have call predecessors, (329), 309 states have return successors, (524), 348 states have call predecessors, (524), 325 states have call successors, (524) [2021-12-06 23:07:32,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3111 states to 3111 states and 4068 transitions. [2021-12-06 23:07:32,715 INFO L78 Accepts]: Start accepts. Automaton has 3111 states and 4068 transitions. Word has length 65 [2021-12-06 23:07:32,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:07:32,715 INFO L470 AbstractCegarLoop]: Abstraction has 3111 states and 4068 transitions. [2021-12-06 23:07:32,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-06 23:07:32,716 INFO L276 IsEmpty]: Start isEmpty. Operand 3111 states and 4068 transitions. [2021-12-06 23:07:32,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-06 23:07:32,718 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:07:32,718 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] [2021-12-06 23:07:32,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-06 23:07:32,718 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:07:32,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:07:32,719 INFO L85 PathProgramCache]: Analyzing trace with hash -869770994, now seen corresponding path program 1 times [2021-12-06 23:07:32,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:07:32,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245309688] [2021-12-06 23:07:32,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:07:32,719 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:07:32,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:32,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 23:07:32,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:32,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 23:07:32,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:32,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-06 23:07:32,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:32,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:07:32,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:32,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 23:07:32,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:32,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 23:07:32,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:32,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-06 23:07:32,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:32,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:07:32,785 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:07:32,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245309688] [2021-12-06 23:07:32,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245309688] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:07:32,786 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:07:32,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 23:07:32,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261067178] [2021-12-06 23:07:32,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:07:32,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 23:07:32,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:07:32,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 23:07:32,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-06 23:07:32,788 INFO L87 Difference]: Start difference. First operand 3111 states and 4068 transitions. Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-06 23:07:33,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:07:33,232 INFO L93 Difference]: Finished difference Result 8129 states and 10582 transitions. [2021-12-06 23:07:33,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 23:07:33,232 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 66 [2021-12-06 23:07:33,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:07:33,255 INFO L225 Difference]: With dead ends: 8129 [2021-12-06 23:07:33,255 INFO L226 Difference]: Without dead ends: 5305 [2021-12-06 23:07:33,261 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-12-06 23:07:33,262 INFO L933 BasicCegarLoop]: 577 mSDtfsCounter, 934 mSDsluCounter, 835 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 942 SdHoareTripleChecker+Valid, 1412 SdHoareTripleChecker+Invalid, 585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 23:07:33,262 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [942 Valid, 1412 Invalid, 585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 407 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 23:07:33,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5305 states. [2021-12-06 23:07:33,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5305 to 4789. [2021-12-06 23:07:33,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4789 states, 3756 states have (on average 1.2819488817891374) internal successors, (4815), 3807 states have internal predecessors, (4815), 523 states have call successors, (523), 428 states have call predecessors, (523), 508 states have return successors, (845), 560 states have call predecessors, (845), 519 states have call successors, (845) [2021-12-06 23:07:33,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4789 states to 4789 states and 6183 transitions. [2021-12-06 23:07:33,442 INFO L78 Accepts]: Start accepts. Automaton has 4789 states and 6183 transitions. Word has length 66 [2021-12-06 23:07:33,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:07:33,443 INFO L470 AbstractCegarLoop]: Abstraction has 4789 states and 6183 transitions. [2021-12-06 23:07:33,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-06 23:07:33,443 INFO L276 IsEmpty]: Start isEmpty. Operand 4789 states and 6183 transitions. [2021-12-06 23:07:33,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-06 23:07:33,445 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:07:33,445 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:07:33,445 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-06 23:07:33,445 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:07:33,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:07:33,445 INFO L85 PathProgramCache]: Analyzing trace with hash -79299166, now seen corresponding path program 1 times [2021-12-06 23:07:33,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:07:33,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017410250] [2021-12-06 23:07:33,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:07:33,455 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:07:33,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:33,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 23:07:33,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:33,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 23:07:33,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:33,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-06 23:07:33,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:33,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:07:33,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:33,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 23:07:33,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:33,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 23:07:33,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:33,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-06 23:07:33,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:33,515 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:07:33,515 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:07:33,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017410250] [2021-12-06 23:07:33,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017410250] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:07:33,516 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:07:33,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 23:07:33,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866223162] [2021-12-06 23:07:33,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:07:33,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 23:07:33,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:07:33,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 23:07:33,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-06 23:07:33,517 INFO L87 Difference]: Start difference. First operand 4789 states and 6183 transitions. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-06 23:07:33,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:07:33,945 INFO L93 Difference]: Finished difference Result 6419 states and 8185 transitions. [2021-12-06 23:07:33,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-06 23:07:33,945 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 73 [2021-12-06 23:07:33,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:07:33,971 INFO L225 Difference]: With dead ends: 6419 [2021-12-06 23:07:33,971 INFO L226 Difference]: Without dead ends: 6416 [2021-12-06 23:07:33,974 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-12-06 23:07:33,974 INFO L933 BasicCegarLoop]: 575 mSDtfsCounter, 1639 mSDsluCounter, 834 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 280 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1648 SdHoareTripleChecker+Valid, 1409 SdHoareTripleChecker+Invalid, 571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 280 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 23:07:33,975 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1648 Valid, 1409 Invalid, 571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [280 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 23:07:33,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6416 states. [2021-12-06 23:07:34,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6416 to 5843. [2021-12-06 23:07:34,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5843 states, 4559 states have (on average 1.2689186225049354) internal successors, (5785), 4619 states have internal predecessors, (5785), 649 states have call successors, (649), 542 states have call predecessors, (649), 633 states have return successors, (1038), 688 states have call predecessors, (1038), 646 states have call successors, (1038) [2021-12-06 23:07:34,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5843 states to 5843 states and 7472 transitions. [2021-12-06 23:07:34,216 INFO L78 Accepts]: Start accepts. Automaton has 5843 states and 7472 transitions. Word has length 73 [2021-12-06 23:07:34,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:07:34,216 INFO L470 AbstractCegarLoop]: Abstraction has 5843 states and 7472 transitions. [2021-12-06 23:07:34,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-06 23:07:34,217 INFO L276 IsEmpty]: Start isEmpty. Operand 5843 states and 7472 transitions. [2021-12-06 23:07:34,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-06 23:07:34,219 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:07:34,219 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:07:34,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-06 23:07:34,219 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:07:34,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:07:34,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1835525111, now seen corresponding path program 1 times [2021-12-06 23:07:34,219 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:07:34,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052067291] [2021-12-06 23:07:34,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:07:34,220 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:07:34,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:34,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 23:07:34,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:34,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 23:07:34,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:34,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-06 23:07:34,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:34,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:07:34,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:34,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 23:07:34,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:34,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 23:07:34,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:34,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-06 23:07:34,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:34,294 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:07:34,294 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:07:34,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052067291] [2021-12-06 23:07:34,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052067291] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:07:34,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281876926] [2021-12-06 23:07:34,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:07:34,294 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:07:34,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c1be151-967f-4d07-9060-7888b16b3816/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:07:34,295 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c1be151-967f-4d07-9060-7888b16b3816/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:07:34,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c1be151-967f-4d07-9060-7888b16b3816/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 23:07:34,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:34,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-06 23:07:34,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:07:34,669 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:07:34,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:07:34,822 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:07:34,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281876926] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:07:34,822 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:07:34,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 4] total 10 [2021-12-06 23:07:34,822 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84573586] [2021-12-06 23:07:34,823 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:07:34,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 23:07:34,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:07:34,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 23:07:34,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-06 23:07:34,824 INFO L87 Difference]: Start difference. First operand 5843 states and 7472 transitions. Second operand has 10 states, 10 states have (on average 12.0) internal successors, (120), 7 states have internal predecessors, (120), 4 states have call successors, (20), 6 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-12-06 23:07:36,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:07:36,063 INFO L93 Difference]: Finished difference Result 13489 states and 17000 transitions. [2021-12-06 23:07:36,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-06 23:07:36,063 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 12.0) internal successors, (120), 7 states have internal predecessors, (120), 4 states have call successors, (20), 6 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 74 [2021-12-06 23:07:36,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:07:36,107 INFO L225 Difference]: With dead ends: 13489 [2021-12-06 23:07:36,107 INFO L226 Difference]: Without dead ends: 13486 [2021-12-06 23:07:36,110 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 174 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=170, Invalid=642, Unknown=0, NotChecked=0, Total=812 [2021-12-06 23:07:36,110 INFO L933 BasicCegarLoop]: 737 mSDtfsCounter, 1523 mSDsluCounter, 2048 mSDsCounter, 0 mSdLazyCounter, 1986 mSolverCounterSat, 203 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1588 SdHoareTripleChecker+Valid, 2785 SdHoareTripleChecker+Invalid, 2189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 203 IncrementalHoareTripleChecker+Valid, 1986 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 23:07:36,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1588 Valid, 2785 Invalid, 2189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [203 Valid, 1986 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-06 23:07:36,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13486 states. [2021-12-06 23:07:36,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13486 to 11101. [2021-12-06 23:07:36,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11101 states, 8651 states have (on average 1.2592763842330366) internal successors, (10894), 8763 states have internal predecessors, (10894), 1215 states have call successors, (1215), 1032 states have call predecessors, (1215), 1233 states have return successors, (1977), 1312 states have call predecessors, (1977), 1212 states have call successors, (1977) [2021-12-06 23:07:36,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11101 states to 11101 states and 14086 transitions. [2021-12-06 23:07:36,575 INFO L78 Accepts]: Start accepts. Automaton has 11101 states and 14086 transitions. Word has length 74 [2021-12-06 23:07:36,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:07:36,575 INFO L470 AbstractCegarLoop]: Abstraction has 11101 states and 14086 transitions. [2021-12-06 23:07:36,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.0) internal successors, (120), 7 states have internal predecessors, (120), 4 states have call successors, (20), 6 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-12-06 23:07:36,575 INFO L276 IsEmpty]: Start isEmpty. Operand 11101 states and 14086 transitions. [2021-12-06 23:07:36,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-06 23:07:36,578 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:07:36,578 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:07:36,611 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c1be151-967f-4d07-9060-7888b16b3816/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 23:07:36,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c1be151-967f-4d07-9060-7888b16b3816/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-06 23:07:36,780 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:07:36,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:07:36,781 INFO L85 PathProgramCache]: Analyzing trace with hash 1541776738, now seen corresponding path program 2 times [2021-12-06 23:07:36,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:07:36,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596193217] [2021-12-06 23:07:36,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:07:36,783 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:07:36,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:36,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 23:07:36,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:36,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 23:07:36,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:36,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-06 23:07:36,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:36,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:07:36,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:36,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 23:07:36,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:36,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 23:07:36,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:36,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-06 23:07:36,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:36,949 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:07:36,949 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:07:36,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596193217] [2021-12-06 23:07:36,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596193217] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:07:36,949 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:07:36,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 23:07:36,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358348839] [2021-12-06 23:07:36,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:07:36,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 23:07:36,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:07:36,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 23:07:36,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-06 23:07:36,951 INFO L87 Difference]: Start difference. First operand 11101 states and 14086 transitions. Second operand has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-06 23:07:37,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:07:37,526 INFO L93 Difference]: Finished difference Result 17644 states and 22428 transitions. [2021-12-06 23:07:37,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 23:07:37,526 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 77 [2021-12-06 23:07:37,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:07:37,549 INFO L225 Difference]: With dead ends: 17644 [2021-12-06 23:07:37,549 INFO L226 Difference]: Without dead ends: 7706 [2021-12-06 23:07:37,568 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-12-06 23:07:37,569 INFO L933 BasicCegarLoop]: 620 mSDtfsCounter, 1000 mSDsluCounter, 908 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1031 SdHoareTripleChecker+Valid, 1528 SdHoareTripleChecker+Invalid, 420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 23:07:37,569 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1031 Valid, 1528 Invalid, 420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 23:07:37,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7706 states. [2021-12-06 23:07:37,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7706 to 7154. [2021-12-06 23:07:37,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7154 states, 5598 states have (on average 1.2386566630939622) internal successors, (6934), 5666 states have internal predecessors, (6934), 782 states have call successors, (782), 656 states have call predecessors, (782), 772 states have return successors, (1196), 838 states have call predecessors, (1196), 779 states have call successors, (1196) [2021-12-06 23:07:37,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7154 states to 7154 states and 8912 transitions. [2021-12-06 23:07:37,859 INFO L78 Accepts]: Start accepts. Automaton has 7154 states and 8912 transitions. Word has length 77 [2021-12-06 23:07:37,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:07:37,859 INFO L470 AbstractCegarLoop]: Abstraction has 7154 states and 8912 transitions. [2021-12-06 23:07:37,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-06 23:07:37,860 INFO L276 IsEmpty]: Start isEmpty. Operand 7154 states and 8912 transitions. [2021-12-06 23:07:37,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-12-06 23:07:37,862 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:07:37,862 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:07:37,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-06 23:07:37,863 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:07:37,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:07:37,863 INFO L85 PathProgramCache]: Analyzing trace with hash 68149481, now seen corresponding path program 1 times [2021-12-06 23:07:37,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:07:37,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982994489] [2021-12-06 23:07:37,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:07:37,863 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:07:37,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:37,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 23:07:37,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:37,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 23:07:37,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:37,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-06 23:07:37,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:37,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:07:37,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:37,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 23:07:37,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:37,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 23:07:37,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:37,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-06 23:07:37,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:37,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-06 23:07:37,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:37,943 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-06 23:07:37,944 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:07:37,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982994489] [2021-12-06 23:07:37,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982994489] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:07:37,944 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:07:37,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-06 23:07:37,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004226017] [2021-12-06 23:07:37,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:07:37,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 23:07:37,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:07:37,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 23:07:37,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-06 23:07:37,946 INFO L87 Difference]: Start difference. First operand 7154 states and 8912 transitions. Second operand has 8 states, 8 states have (on average 7.875) internal successors, (63), 5 states have internal predecessors, (63), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-06 23:07:38,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:07:38,898 INFO L93 Difference]: Finished difference Result 21028 states and 26129 transitions. [2021-12-06 23:07:38,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-06 23:07:38,898 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 5 states have internal predecessors, (63), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 84 [2021-12-06 23:07:38,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:07:38,933 INFO L225 Difference]: With dead ends: 21028 [2021-12-06 23:07:38,933 INFO L226 Difference]: Without dead ends: 14185 [2021-12-06 23:07:38,946 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2021-12-06 23:07:38,947 INFO L933 BasicCegarLoop]: 631 mSDtfsCounter, 1475 mSDsluCounter, 1171 mSDsCounter, 0 mSdLazyCounter, 990 mSolverCounterSat, 332 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1491 SdHoareTripleChecker+Valid, 1802 SdHoareTripleChecker+Invalid, 1322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 332 IncrementalHoareTripleChecker+Valid, 990 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 23:07:38,947 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1491 Valid, 1802 Invalid, 1322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [332 Valid, 990 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 23:07:38,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14185 states. [2021-12-06 23:07:39,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14185 to 13326. [2021-12-06 23:07:39,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13326 states, 10274 states have (on average 1.208974109402375) internal successors, (12421), 10448 states have internal predecessors, (12421), 1498 states have call successors, (1498), 1260 states have call predecessors, (1498), 1552 states have return successors, (2599), 1630 states have call predecessors, (2599), 1495 states have call successors, (2599) [2021-12-06 23:07:39,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13326 states to 13326 states and 16518 transitions. [2021-12-06 23:07:39,452 INFO L78 Accepts]: Start accepts. Automaton has 13326 states and 16518 transitions. Word has length 84 [2021-12-06 23:07:39,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:07:39,453 INFO L470 AbstractCegarLoop]: Abstraction has 13326 states and 16518 transitions. [2021-12-06 23:07:39,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 5 states have internal predecessors, (63), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-06 23:07:39,453 INFO L276 IsEmpty]: Start isEmpty. Operand 13326 states and 16518 transitions. [2021-12-06 23:07:39,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-06 23:07:39,458 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:07:39,458 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:07:39,458 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-06 23:07:39,458 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:07:39,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:07:39,459 INFO L85 PathProgramCache]: Analyzing trace with hash -1418215744, now seen corresponding path program 1 times [2021-12-06 23:07:39,459 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:07:39,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881613004] [2021-12-06 23:07:39,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:07:39,459 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:07:39,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:39,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 23:07:39,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:39,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 23:07:39,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:39,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-06 23:07:39,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:39,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:07:39,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:39,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 23:07:39,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:39,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 23:07:39,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:39,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-06 23:07:39,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:39,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-06 23:07:39,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:39,523 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 23:07:39,523 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:07:39,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881613004] [2021-12-06 23:07:39,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881613004] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:07:39,524 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:07:39,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-06 23:07:39,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784110409] [2021-12-06 23:07:39,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:07:39,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 23:07:39,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:07:39,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 23:07:39,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-12-06 23:07:39,525 INFO L87 Difference]: Start difference. First operand 13326 states and 16518 transitions. Second operand has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-06 23:07:40,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:07:40,622 INFO L93 Difference]: Finished difference Result 24200 states and 29837 transitions. [2021-12-06 23:07:40,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-06 23:07:40,623 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 93 [2021-12-06 23:07:40,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:07:40,646 INFO L225 Difference]: With dead ends: 24200 [2021-12-06 23:07:40,646 INFO L226 Difference]: Without dead ends: 11801 [2021-12-06 23:07:40,664 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=162, Invalid=540, Unknown=0, NotChecked=0, Total=702 [2021-12-06 23:07:40,665 INFO L933 BasicCegarLoop]: 610 mSDtfsCounter, 2042 mSDsluCounter, 1489 mSDsCounter, 0 mSdLazyCounter, 1295 mSolverCounterSat, 405 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2084 SdHoareTripleChecker+Valid, 2099 SdHoareTripleChecker+Invalid, 1700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 405 IncrementalHoareTripleChecker+Valid, 1295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 23:07:40,665 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2084 Valid, 2099 Invalid, 1700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [405 Valid, 1295 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-06 23:07:40,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11801 states. [2021-12-06 23:07:41,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11801 to 10901. [2021-12-06 23:07:41,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10901 states, 8440 states have (on average 1.2004739336492891) internal successors, (10132), 8581 states have internal predecessors, (10132), 1199 states have call successors, (1199), 1009 states have call predecessors, (1199), 1260 states have return successors, (1931), 1320 states have call predecessors, (1931), 1196 states have call successors, (1931) [2021-12-06 23:07:41,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10901 states to 10901 states and 13262 transitions. [2021-12-06 23:07:41,143 INFO L78 Accepts]: Start accepts. Automaton has 10901 states and 13262 transitions. Word has length 93 [2021-12-06 23:07:41,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:07:41,143 INFO L470 AbstractCegarLoop]: Abstraction has 10901 states and 13262 transitions. [2021-12-06 23:07:41,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-06 23:07:41,143 INFO L276 IsEmpty]: Start isEmpty. Operand 10901 states and 13262 transitions. [2021-12-06 23:07:41,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-12-06 23:07:41,151 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:07:41,151 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:07:41,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-06 23:07:41,151 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:07:41,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:07:41,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1086528831, now seen corresponding path program 1 times [2021-12-06 23:07:41,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:07:41,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696267084] [2021-12-06 23:07:41,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:07:41,152 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:07:41,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:41,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 23:07:41,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:41,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 23:07:41,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:41,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-06 23:07:41,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:41,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:07:41,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:41,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 23:07:41,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:41,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 23:07:41,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:41,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-06 23:07:41,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:41,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-06 23:07:41,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:41,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-06 23:07:41,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:41,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-06 23:07:41,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:41,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-06 23:07:41,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:41,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:07:41,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:41,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 23:07:41,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:41,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-06 23:07:41,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:41,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-06 23:07:41,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:41,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2021-12-06 23:07:41,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:41,240 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-12-06 23:07:41,240 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:07:41,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696267084] [2021-12-06 23:07:41,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696267084] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:07:41,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034610001] [2021-12-06 23:07:41,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:07:41,241 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:07:41,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c1be151-967f-4d07-9060-7888b16b3816/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:07:41,241 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c1be151-967f-4d07-9060-7888b16b3816/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:07:41,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c1be151-967f-4d07-9060-7888b16b3816/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 23:07:41,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:41,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 543 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-06 23:07:41,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:07:41,449 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 23:07:41,449 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 23:07:41,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034610001] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:07:41,450 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 23:07:41,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 12 [2021-12-06 23:07:41,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315249128] [2021-12-06 23:07:41,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:07:41,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 23:07:41,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:07:41,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 23:07:41,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-12-06 23:07:41,452 INFO L87 Difference]: Start difference. First operand 10901 states and 13262 transitions. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 5 states have internal predecessors, (106), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-06 23:07:41,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:07:41,716 INFO L93 Difference]: Finished difference Result 16049 states and 19482 transitions. [2021-12-06 23:07:41,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 23:07:41,717 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 5 states have internal predecessors, (106), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) Word has length 145 [2021-12-06 23:07:41,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:07:41,727 INFO L225 Difference]: With dead ends: 16049 [2021-12-06 23:07:41,727 INFO L226 Difference]: Without dead ends: 5467 [2021-12-06 23:07:41,741 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-12-06 23:07:41,742 INFO L933 BasicCegarLoop]: 573 mSDtfsCounter, 34 mSDsluCounter, 2255 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 2828 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:07:41,742 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 2828 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:07:41,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5467 states. [2021-12-06 23:07:41,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5467 to 5025. [2021-12-06 23:07:41,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5025 states, 4005 states have (on average 1.1980024968789014) internal successors, (4798), 4044 states have internal predecessors, (4798), 501 states have call successors, (501), 403 states have call predecessors, (501), 517 states have return successors, (771), 578 states have call predecessors, (771), 498 states have call successors, (771) [2021-12-06 23:07:41,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5025 states to 5025 states and 6070 transitions. [2021-12-06 23:07:41,921 INFO L78 Accepts]: Start accepts. Automaton has 5025 states and 6070 transitions. Word has length 145 [2021-12-06 23:07:41,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:07:41,922 INFO L470 AbstractCegarLoop]: Abstraction has 5025 states and 6070 transitions. [2021-12-06 23:07:41,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 5 states have internal predecessors, (106), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-06 23:07:41,922 INFO L276 IsEmpty]: Start isEmpty. Operand 5025 states and 6070 transitions. [2021-12-06 23:07:41,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-06 23:07:41,930 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:07:41,930 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:07:41,950 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c1be151-967f-4d07-9060-7888b16b3816/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 23:07:42,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c1be151-967f-4d07-9060-7888b16b3816/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:07:42,131 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:07:42,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:07:42,132 INFO L85 PathProgramCache]: Analyzing trace with hash -1051309190, now seen corresponding path program 1 times [2021-12-06 23:07:42,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:07:42,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500910599] [2021-12-06 23:07:42,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:07:42,132 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:07:42,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:42,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 23:07:42,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:42,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 23:07:42,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:42,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 23:07:42,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:42,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-06 23:07:42,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:42,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-06 23:07:42,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:42,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:07:42,234 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:07:42,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500910599] [2021-12-06 23:07:42,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500910599] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:07:42,234 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:07:42,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 23:07:42,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949749434] [2021-12-06 23:07:42,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:07:42,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 23:07:42,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:07:42,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 23:07:42,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 23:07:42,235 INFO L87 Difference]: Start difference. First operand 5025 states and 6070 transitions. Second operand has 5 states, 5 states have (on average 24.8) internal successors, (124), 3 states have internal predecessors, (124), 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) [2021-12-06 23:07:43,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:07:43,174 INFO L93 Difference]: Finished difference Result 5396 states and 6664 transitions. [2021-12-06 23:07:43,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 23:07:43,174 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 24.8) internal successors, (124), 3 states have internal predecessors, (124), 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 135 [2021-12-06 23:07:43,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:07:43,183 INFO L225 Difference]: With dead ends: 5396 [2021-12-06 23:07:43,183 INFO L226 Difference]: Without dead ends: 5123 [2021-12-06 23:07:43,185 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-06 23:07:43,185 INFO L933 BasicCegarLoop]: 612 mSDtfsCounter, 841 mSDsluCounter, 504 mSDsCounter, 0 mSdLazyCounter, 570 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 861 SdHoareTripleChecker+Valid, 1116 SdHoareTripleChecker+Invalid, 656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 23:07:43,185 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [861 Valid, 1116 Invalid, 656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 570 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-06 23:07:43,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5123 states. [2021-12-06 23:07:43,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5123 to 5025. [2021-12-06 23:07:43,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5025 states, 4005 states have (on average 1.1977528089887641) internal successors, (4797), 4044 states have internal predecessors, (4797), 501 states have call successors, (501), 403 states have call predecessors, (501), 517 states have return successors, (771), 578 states have call predecessors, (771), 498 states have call successors, (771) [2021-12-06 23:07:43,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5025 states to 5025 states and 6069 transitions. [2021-12-06 23:07:43,471 INFO L78 Accepts]: Start accepts. Automaton has 5025 states and 6069 transitions. Word has length 135 [2021-12-06 23:07:43,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:07:43,471 INFO L470 AbstractCegarLoop]: Abstraction has 5025 states and 6069 transitions. [2021-12-06 23:07:43,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.8) internal successors, (124), 3 states have internal predecessors, (124), 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) [2021-12-06 23:07:43,472 INFO L276 IsEmpty]: Start isEmpty. Operand 5025 states and 6069 transitions. [2021-12-06 23:07:43,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-06 23:07:43,476 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:07:43,476 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:07:43,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-06 23:07:43,476 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:07:43,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:07:43,477 INFO L85 PathProgramCache]: Analyzing trace with hash 999099708, now seen corresponding path program 1 times [2021-12-06 23:07:43,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:07:43,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438616921] [2021-12-06 23:07:43,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:07:43,477 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:07:43,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:43,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 23:07:43,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:43,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 23:07:43,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:43,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 23:07:43,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:43,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-06 23:07:43,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:43,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-06 23:07:43,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:43,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:07:43,550 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:07:43,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438616921] [2021-12-06 23:07:43,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438616921] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:07:43,550 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:07:43,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 23:07:43,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598106610] [2021-12-06 23:07:43,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:07:43,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 23:07:43,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:07:43,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 23:07:43,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-06 23:07:43,551 INFO L87 Difference]: Start difference. First operand 5025 states and 6069 transitions. Second operand has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 4 states have internal predecessors, (124), 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) [2021-12-06 23:07:45,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:07:45,179 INFO L93 Difference]: Finished difference Result 5767 states and 7260 transitions. [2021-12-06 23:07:45,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 23:07:45,180 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 4 states have internal predecessors, (124), 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 135 [2021-12-06 23:07:45,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:07:45,190 INFO L225 Difference]: With dead ends: 5767 [2021-12-06 23:07:45,190 INFO L226 Difference]: Without dead ends: 5499 [2021-12-06 23:07:45,192 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-12-06 23:07:45,193 INFO L933 BasicCegarLoop]: 638 mSDtfsCounter, 1326 mSDsluCounter, 942 mSDsCounter, 0 mSdLazyCounter, 1493 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1351 SdHoareTripleChecker+Valid, 1580 SdHoareTripleChecker+Invalid, 1635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 1493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-06 23:07:45,193 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1351 Valid, 1580 Invalid, 1635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 1493 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-06 23:07:45,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5499 states. [2021-12-06 23:07:45,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5499 to 5302. [2021-12-06 23:07:45,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5302 states, 4258 states have (on average 1.2209957726632221) internal successors, (5199), 4298 states have internal predecessors, (5199), 518 states have call successors, (518), 409 states have call predecessors, (518), 524 states have return successors, (791), 595 states have call predecessors, (791), 515 states have call successors, (791) [2021-12-06 23:07:45,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5302 states to 5302 states and 6508 transitions. [2021-12-06 23:07:45,496 INFO L78 Accepts]: Start accepts. Automaton has 5302 states and 6508 transitions. Word has length 135 [2021-12-06 23:07:45,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:07:45,496 INFO L470 AbstractCegarLoop]: Abstraction has 5302 states and 6508 transitions. [2021-12-06 23:07:45,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 4 states have internal predecessors, (124), 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) [2021-12-06 23:07:45,497 INFO L276 IsEmpty]: Start isEmpty. Operand 5302 states and 6508 transitions. [2021-12-06 23:07:45,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-06 23:07:45,501 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:07:45,501 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:07:45,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-06 23:07:45,501 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:07:45,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:07:45,502 INFO L85 PathProgramCache]: Analyzing trace with hash -362902728, now seen corresponding path program 1 times [2021-12-06 23:07:45,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:07:45,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817720404] [2021-12-06 23:07:45,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:07:45,502 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:07:45,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:45,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 23:07:45,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:45,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 23:07:45,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:45,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 23:07:45,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:45,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-06 23:07:45,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:45,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-06 23:07:45,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:45,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:07:45,579 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:07:45,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817720404] [2021-12-06 23:07:45,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817720404] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:07:45,579 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:07:45,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 23:07:45,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390141345] [2021-12-06 23:07:45,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:07:45,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 23:07:45,580 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:07:45,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 23:07:45,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 23:07:45,580 INFO L87 Difference]: Start difference. First operand 5302 states and 6508 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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) [2021-12-06 23:07:47,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:07:47,436 INFO L93 Difference]: Finished difference Result 6430 states and 8318 transitions. [2021-12-06 23:07:47,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 23:07:47,436 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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 135 [2021-12-06 23:07:47,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:07:47,446 INFO L225 Difference]: With dead ends: 6430 [2021-12-06 23:07:47,446 INFO L226 Difference]: Without dead ends: 5885 [2021-12-06 23:07:47,449 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-06 23:07:47,449 INFO L933 BasicCegarLoop]: 863 mSDtfsCounter, 1337 mSDsluCounter, 1714 mSDsCounter, 0 mSdLazyCounter, 2366 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1362 SdHoareTripleChecker+Valid, 2577 SdHoareTripleChecker+Invalid, 2471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 2366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-06 23:07:47,450 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1362 Valid, 2577 Invalid, 2471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 2366 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-06 23:07:47,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5885 states. [2021-12-06 23:07:47,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5885 to 5560. [2021-12-06 23:07:47,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5560 states, 4492 states have (on average 1.2384238646482635) internal successors, (5563), 4533 states have internal predecessors, (5563), 535 states have call successors, (535), 415 states have call predecessors, (535), 531 states have return successors, (810), 613 states have call predecessors, (810), 532 states have call successors, (810) [2021-12-06 23:07:47,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5560 states to 5560 states and 6908 transitions. [2021-12-06 23:07:47,766 INFO L78 Accepts]: Start accepts. Automaton has 5560 states and 6908 transitions. Word has length 135 [2021-12-06 23:07:47,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:07:47,766 INFO L470 AbstractCegarLoop]: Abstraction has 5560 states and 6908 transitions. [2021-12-06 23:07:47,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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) [2021-12-06 23:07:47,767 INFO L276 IsEmpty]: Start isEmpty. Operand 5560 states and 6908 transitions. [2021-12-06 23:07:47,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-06 23:07:47,771 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:07:47,771 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:07:47,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-06 23:07:47,771 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:07:47,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:07:47,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1566029498, now seen corresponding path program 1 times [2021-12-06 23:07:47,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:07:47,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030882120] [2021-12-06 23:07:47,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:07:47,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:07:47,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:47,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 23:07:47,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:47,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 23:07:47,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:47,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 23:07:47,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:47,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-06 23:07:47,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:47,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-06 23:07:47,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:47,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:07:47,847 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:07:47,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030882120] [2021-12-06 23:07:47,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030882120] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:07:47,847 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:07:47,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 23:07:47,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945176549] [2021-12-06 23:07:47,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:07:47,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 23:07:47,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:07:47,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 23:07:47,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 23:07:47,848 INFO L87 Difference]: Start difference. First operand 5560 states and 6908 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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) [2021-12-06 23:07:49,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:07:49,785 INFO L93 Difference]: Finished difference Result 7407 states and 9866 transitions. [2021-12-06 23:07:49,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 23:07:49,785 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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 135 [2021-12-06 23:07:49,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:07:49,800 INFO L225 Difference]: With dead ends: 7407 [2021-12-06 23:07:49,800 INFO L226 Difference]: Without dead ends: 6604 [2021-12-06 23:07:49,803 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-06 23:07:49,804 INFO L933 BasicCegarLoop]: 853 mSDtfsCounter, 1337 mSDsluCounter, 1710 mSDsCounter, 0 mSdLazyCounter, 2369 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1362 SdHoareTripleChecker+Valid, 2563 SdHoareTripleChecker+Invalid, 2480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 2369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-06 23:07:49,804 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1362 Valid, 2563 Invalid, 2480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 2369 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-06 23:07:49,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6604 states. [2021-12-06 23:07:50,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6604 to 6077. [2021-12-06 23:07:50,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6077 states, 4961 states have (on average 1.2682926829268293) internal successors, (6292), 5004 states have internal predecessors, (6292), 569 states have call successors, (569), 427 states have call predecessors, (569), 545 states have return successors, (852), 649 states have call predecessors, (852), 566 states have call successors, (852) [2021-12-06 23:07:50,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6077 states to 6077 states and 7713 transitions. [2021-12-06 23:07:50,138 INFO L78 Accepts]: Start accepts. Automaton has 6077 states and 7713 transitions. Word has length 135 [2021-12-06 23:07:50,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:07:50,139 INFO L470 AbstractCegarLoop]: Abstraction has 6077 states and 7713 transitions. [2021-12-06 23:07:50,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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) [2021-12-06 23:07:50,139 INFO L276 IsEmpty]: Start isEmpty. Operand 6077 states and 7713 transitions. [2021-12-06 23:07:50,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-06 23:07:50,144 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:07:50,144 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:07:50,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-06 23:07:50,144 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:07:50,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:07:50,145 INFO L85 PathProgramCache]: Analyzing trace with hash -727051528, now seen corresponding path program 1 times [2021-12-06 23:07:50,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:07:50,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13373706] [2021-12-06 23:07:50,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:07:50,145 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:07:50,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:50,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 23:07:50,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:50,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 23:07:50,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:50,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 23:07:50,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:50,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-06 23:07:50,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:50,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-06 23:07:50,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:50,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:07:50,221 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:07:50,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13373706] [2021-12-06 23:07:50,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13373706] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:07:50,222 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:07:50,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 23:07:50,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576112286] [2021-12-06 23:07:50,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:07:50,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 23:07:50,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:07:50,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 23:07:50,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 23:07:50,223 INFO L87 Difference]: Start difference. First operand 6077 states and 7713 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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) [2021-12-06 23:07:52,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:07:52,169 INFO L93 Difference]: Finished difference Result 9285 states and 12827 transitions. [2021-12-06 23:07:52,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 23:07:52,170 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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 135 [2021-12-06 23:07:52,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:07:52,185 INFO L225 Difference]: With dead ends: 9285 [2021-12-06 23:07:52,185 INFO L226 Difference]: Without dead ends: 7965 [2021-12-06 23:07:52,190 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-06 23:07:52,190 INFO L933 BasicCegarLoop]: 845 mSDtfsCounter, 1332 mSDsluCounter, 1710 mSDsCounter, 0 mSdLazyCounter, 2349 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1357 SdHoareTripleChecker+Valid, 2555 SdHoareTripleChecker+Invalid, 2461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 2349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-06 23:07:52,190 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1357 Valid, 2555 Invalid, 2461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 2349 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-06 23:07:52,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7965 states. [2021-12-06 23:07:52,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7965 to 7117. [2021-12-06 23:07:52,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7117 states, 5905 states have (on average 1.3141405588484336) internal successors, (7760), 5952 states have internal predecessors, (7760), 637 states have call successors, (637), 451 states have call predecessors, (637), 573 states have return successors, (942), 721 states have call predecessors, (942), 634 states have call successors, (942) [2021-12-06 23:07:52,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7117 states to 7117 states and 9339 transitions. [2021-12-06 23:07:52,622 INFO L78 Accepts]: Start accepts. Automaton has 7117 states and 9339 transitions. Word has length 135 [2021-12-06 23:07:52,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:07:52,622 INFO L470 AbstractCegarLoop]: Abstraction has 7117 states and 9339 transitions. [2021-12-06 23:07:52,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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) [2021-12-06 23:07:52,623 INFO L276 IsEmpty]: Start isEmpty. Operand 7117 states and 9339 transitions. [2021-12-06 23:07:52,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-06 23:07:52,628 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:07:52,628 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:07:52,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-06 23:07:52,628 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:07:52,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:07:52,628 INFO L85 PathProgramCache]: Analyzing trace with hash -255695178, now seen corresponding path program 1 times [2021-12-06 23:07:52,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:07:52,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617361146] [2021-12-06 23:07:52,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:07:52,629 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:07:52,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:52,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 23:07:52,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:52,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 23:07:52,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:52,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 23:07:52,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:52,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-06 23:07:52,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:52,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-06 23:07:52,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:52,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:07:52,711 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:07:52,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617361146] [2021-12-06 23:07:52,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617361146] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:07:52,712 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:07:52,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 23:07:52,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284002302] [2021-12-06 23:07:52,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:07:52,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 23:07:52,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:07:52,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 23:07:52,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 23:07:52,713 INFO L87 Difference]: Start difference. First operand 7117 states and 9339 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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) [2021-12-06 23:07:54,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:07:54,873 INFO L93 Difference]: Finished difference Result 13051 states and 18783 transitions. [2021-12-06 23:07:54,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 23:07:54,874 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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 135 [2021-12-06 23:07:54,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:07:54,895 INFO L225 Difference]: With dead ends: 13051 [2021-12-06 23:07:54,895 INFO L226 Difference]: Without dead ends: 10691 [2021-12-06 23:07:54,901 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-06 23:07:54,902 INFO L933 BasicCegarLoop]: 840 mSDtfsCounter, 1331 mSDsluCounter, 1710 mSDsCounter, 0 mSdLazyCounter, 2341 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1356 SdHoareTripleChecker+Valid, 2550 SdHoareTripleChecker+Invalid, 2453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 2341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-06 23:07:54,902 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1356 Valid, 2550 Invalid, 2453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 2341 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-06 23:07:54,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10691 states. [2021-12-06 23:07:55,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10691 to 9202. [2021-12-06 23:07:55,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9202 states, 7798 states have (on average 1.3724031803026417) internal successors, (10702), 7853 states have internal predecessors, (10702), 773 states have call successors, (773), 499 states have call predecessors, (773), 629 states have return successors, (1140), 865 states have call predecessors, (1140), 770 states have call successors, (1140) [2021-12-06 23:07:55,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9202 states to 9202 states and 12615 transitions. [2021-12-06 23:07:55,446 INFO L78 Accepts]: Start accepts. Automaton has 9202 states and 12615 transitions. Word has length 135 [2021-12-06 23:07:55,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:07:55,446 INFO L470 AbstractCegarLoop]: Abstraction has 9202 states and 12615 transitions. [2021-12-06 23:07:55,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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) [2021-12-06 23:07:55,446 INFO L276 IsEmpty]: Start isEmpty. Operand 9202 states and 12615 transitions. [2021-12-06 23:07:55,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-06 23:07:55,454 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:07:55,454 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:07:55,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-06 23:07:55,454 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:07:55,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:07:55,454 INFO L85 PathProgramCache]: Analyzing trace with hash -1903058120, now seen corresponding path program 1 times [2021-12-06 23:07:55,454 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:07:55,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402985300] [2021-12-06 23:07:55,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:07:55,455 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:07:55,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:55,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 23:07:55,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:55,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 23:07:55,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:55,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 23:07:55,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:55,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-06 23:07:55,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:55,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-06 23:07:55,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:55,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:07:55,526 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:07:55,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402985300] [2021-12-06 23:07:55,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402985300] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:07:55,526 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:07:55,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 23:07:55,527 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187255888] [2021-12-06 23:07:55,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:07:55,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 23:07:55,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:07:55,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 23:07:55,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-06 23:07:55,528 INFO L87 Difference]: Start difference. First operand 9202 states and 12615 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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) [2021-12-06 23:07:57,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:07:57,005 INFO L93 Difference]: Finished difference Result 15194 states and 22242 transitions. [2021-12-06 23:07:57,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 23:07:57,006 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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 135 [2021-12-06 23:07:57,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:07:57,027 INFO L225 Difference]: With dead ends: 15194 [2021-12-06 23:07:57,027 INFO L226 Difference]: Without dead ends: 10749 [2021-12-06 23:07:57,037 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 [2021-12-06 23:07:57,037 INFO L933 BasicCegarLoop]: 573 mSDtfsCounter, 1195 mSDsluCounter, 723 mSDsCounter, 0 mSdLazyCounter, 1035 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1221 SdHoareTripleChecker+Valid, 1296 SdHoareTripleChecker+Invalid, 1189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 1035 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-06 23:07:57,038 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1221 Valid, 1296 Invalid, 1189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 1035 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-06 23:07:57,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10749 states. [2021-12-06 23:07:57,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10749 to 9202. [2021-12-06 23:07:57,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9202 states, 7798 states have (on average 1.3702231341369582) internal successors, (10685), 7853 states have internal predecessors, (10685), 773 states have call successors, (773), 499 states have call predecessors, (773), 629 states have return successors, (1140), 865 states have call predecessors, (1140), 770 states have call successors, (1140) [2021-12-06 23:07:57,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9202 states to 9202 states and 12598 transitions. [2021-12-06 23:07:57,587 INFO L78 Accepts]: Start accepts. Automaton has 9202 states and 12598 transitions. Word has length 135 [2021-12-06 23:07:57,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:07:57,587 INFO L470 AbstractCegarLoop]: Abstraction has 9202 states and 12598 transitions. [2021-12-06 23:07:57,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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) [2021-12-06 23:07:57,587 INFO L276 IsEmpty]: Start isEmpty. Operand 9202 states and 12598 transitions. [2021-12-06 23:07:57,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-06 23:07:57,593 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:07:57,593 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:07:57,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-06 23:07:57,594 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:07:57,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:07:57,594 INFO L85 PathProgramCache]: Analyzing trace with hash 260558454, now seen corresponding path program 1 times [2021-12-06 23:07:57,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:07:57,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576097063] [2021-12-06 23:07:57,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:07:57,594 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:07:57,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:57,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 23:07:57,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:57,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 23:07:57,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:57,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 23:07:57,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:57,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-06 23:07:57,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:57,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-06 23:07:57,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:57,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:07:57,658 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:07:57,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576097063] [2021-12-06 23:07:57,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576097063] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:07:57,658 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:07:57,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 23:07:57,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631578169] [2021-12-06 23:07:57,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:07:57,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 23:07:57,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:07:57,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 23:07:57,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 23:07:57,659 INFO L87 Difference]: Start difference. First operand 9202 states and 12598 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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) [2021-12-06 23:08:00,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:08:00,110 INFO L93 Difference]: Finished difference Result 20564 states and 30633 transitions. [2021-12-06 23:08:00,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 23:08:00,110 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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 135 [2021-12-06 23:08:00,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:08:00,138 INFO L225 Difference]: With dead ends: 20564 [2021-12-06 23:08:00,138 INFO L226 Difference]: Without dead ends: 16119 [2021-12-06 23:08:00,145 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-06 23:08:00,146 INFO L933 BasicCegarLoop]: 649 mSDtfsCounter, 1396 mSDsluCounter, 1217 mSDsCounter, 0 mSdLazyCounter, 2083 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1421 SdHoareTripleChecker+Valid, 1866 SdHoareTripleChecker+Invalid, 2227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 2083 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-06 23:08:00,146 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1421 Valid, 1866 Invalid, 2227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 2083 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-06 23:08:00,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16119 states. [2021-12-06 23:08:00,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16119 to 13404. [2021-12-06 23:08:00,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13404 states, 11616 states have (on average 1.428460743801653) internal successors, (16593), 11687 states have internal predecessors, (16593), 1045 states have call successors, (1045), 595 states have call predecessors, (1045), 741 states have return successors, (1590), 1153 states have call predecessors, (1590), 1042 states have call successors, (1590) [2021-12-06 23:08:00,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13404 states to 13404 states and 19228 transitions. [2021-12-06 23:08:00,937 INFO L78 Accepts]: Start accepts. Automaton has 13404 states and 19228 transitions. Word has length 135 [2021-12-06 23:08:00,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:08:00,937 INFO L470 AbstractCegarLoop]: Abstraction has 13404 states and 19228 transitions. [2021-12-06 23:08:00,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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) [2021-12-06 23:08:00,937 INFO L276 IsEmpty]: Start isEmpty. Operand 13404 states and 19228 transitions. [2021-12-06 23:08:00,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-06 23:08:00,945 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:08:00,945 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:08:00,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-06 23:08:00,945 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:08:00,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:08:00,945 INFO L85 PathProgramCache]: Analyzing trace with hash -778026120, now seen corresponding path program 1 times [2021-12-06 23:08:00,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:08:00,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952794768] [2021-12-06 23:08:00,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:08:00,946 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:08:00,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:00,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 23:08:00,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:00,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 23:08:00,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:00,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 23:08:00,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:01,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-06 23:08:01,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:01,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-06 23:08:01,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:01,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:08:01,008 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:08:01,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952794768] [2021-12-06 23:08:01,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952794768] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:08:01,008 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:08:01,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 23:08:01,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461972580] [2021-12-06 23:08:01,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:08:01,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 23:08:01,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:08:01,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 23:08:01,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 23:08:01,009 INFO L87 Difference]: Start difference. First operand 13404 states and 19228 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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) [2021-12-06 23:08:04,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:08:04,268 INFO L93 Difference]: Finished difference Result 35628 states and 54673 transitions. [2021-12-06 23:08:04,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 23:08:04,268 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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 135 [2021-12-06 23:08:04,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:08:04,323 INFO L225 Difference]: With dead ends: 35628 [2021-12-06 23:08:04,324 INFO L226 Difference]: Without dead ends: 26981 [2021-12-06 23:08:04,346 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-06 23:08:04,347 INFO L933 BasicCegarLoop]: 824 mSDtfsCounter, 1322 mSDsluCounter, 1710 mSDsCounter, 0 mSdLazyCounter, 2306 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1347 SdHoareTripleChecker+Valid, 2534 SdHoareTripleChecker+Invalid, 2418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 2306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-06 23:08:04,347 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1347 Valid, 2534 Invalid, 2418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 2306 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-06 23:08:04,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26981 states. [2021-12-06 23:08:05,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26981 to 21837. [2021-12-06 23:08:05,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21837 states, 19281 states have (on average 1.4755977387064987) internal successors, (28451), 19384 states have internal predecessors, (28451), 1589 states have call successors, (1589), 787 states have call predecessors, (1589), 965 states have return successors, (2652), 1729 states have call predecessors, (2652), 1586 states have call successors, (2652) [2021-12-06 23:08:05,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21837 states to 21837 states and 32692 transitions. [2021-12-06 23:08:05,705 INFO L78 Accepts]: Start accepts. Automaton has 21837 states and 32692 transitions. Word has length 135 [2021-12-06 23:08:05,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:08:05,706 INFO L470 AbstractCegarLoop]: Abstraction has 21837 states and 32692 transitions. [2021-12-06 23:08:05,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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) [2021-12-06 23:08:05,706 INFO L276 IsEmpty]: Start isEmpty. Operand 21837 states and 32692 transitions. [2021-12-06 23:08:05,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-06 23:08:05,717 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:08:05,717 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:08:05,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-06 23:08:05,718 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:08:05,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:08:05,718 INFO L85 PathProgramCache]: Analyzing trace with hash 1543775798, now seen corresponding path program 1 times [2021-12-06 23:08:05,718 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:08:05,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286405471] [2021-12-06 23:08:05,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:08:05,718 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:08:05,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:05,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 23:08:05,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:05,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 23:08:05,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:05,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 23:08:05,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:05,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-06 23:08:05,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:05,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-06 23:08:05,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:05,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:08:05,783 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:08:05,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286405471] [2021-12-06 23:08:05,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286405471] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:08:05,783 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:08:05,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 23:08:05,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543585217] [2021-12-06 23:08:05,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:08:05,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 23:08:05,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:08:05,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 23:08:05,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 23:08:05,784 INFO L87 Difference]: Start difference. First operand 21837 states and 32692 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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) [2021-12-06 23:08:11,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:08:11,755 INFO L93 Difference]: Finished difference Result 73499 states and 115129 transitions. [2021-12-06 23:08:11,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 23:08:11,755 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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 135 [2021-12-06 23:08:11,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:08:11,893 INFO L225 Difference]: With dead ends: 73499 [2021-12-06 23:08:11,893 INFO L226 Difference]: Without dead ends: 56419 [2021-12-06 23:08:11,934 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-06 23:08:11,934 INFO L933 BasicCegarLoop]: 953 mSDtfsCounter, 1404 mSDsluCounter, 1702 mSDsCounter, 0 mSdLazyCounter, 2687 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1428 SdHoareTripleChecker+Valid, 2655 SdHoareTripleChecker+Invalid, 2801 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 2687 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-06 23:08:11,935 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1428 Valid, 2655 Invalid, 2801 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 2687 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-06 23:08:11,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56419 states. [2021-12-06 23:08:14,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56419 to 38574. [2021-12-06 23:08:14,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38574 states, 34546 states have (on average 1.5090893301684711) internal successors, (52133), 34713 states have internal predecessors, (52133), 2613 states have call successors, (2613), 1171 states have call predecessors, (2613), 1413 states have return successors, (5198), 2817 states have call predecessors, (5198), 2610 states have call successors, (5198) [2021-12-06 23:08:14,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38574 states to 38574 states and 59944 transitions. [2021-12-06 23:08:14,589 INFO L78 Accepts]: Start accepts. Automaton has 38574 states and 59944 transitions. Word has length 135 [2021-12-06 23:08:14,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:08:14,589 INFO L470 AbstractCegarLoop]: Abstraction has 38574 states and 59944 transitions. [2021-12-06 23:08:14,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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) [2021-12-06 23:08:14,589 INFO L276 IsEmpty]: Start isEmpty. Operand 38574 states and 59944 transitions. [2021-12-06 23:08:14,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-06 23:08:14,606 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:08:14,606 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:08:14,606 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-06 23:08:14,606 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:08:14,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:08:14,606 INFO L85 PathProgramCache]: Analyzing trace with hash -598084680, now seen corresponding path program 1 times [2021-12-06 23:08:14,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:08:14,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992168943] [2021-12-06 23:08:14,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:08:14,607 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:08:14,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:14,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 23:08:14,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:14,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 23:08:14,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:14,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 23:08:14,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:14,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-06 23:08:14,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:14,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-06 23:08:14,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:14,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:08:14,670 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:08:14,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992168943] [2021-12-06 23:08:14,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992168943] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:08:14,670 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:08:14,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 23:08:14,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354665192] [2021-12-06 23:08:14,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:08:14,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 23:08:14,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:08:14,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 23:08:14,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 23:08:14,671 INFO L87 Difference]: Start difference. First operand 38574 states and 59944 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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) [2021-12-06 23:08:24,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:08:24,673 INFO L93 Difference]: Finished difference Result 139386 states and 222911 transitions. [2021-12-06 23:08:24,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 23:08:24,674 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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 135 [2021-12-06 23:08:24,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:08:24,981 INFO L225 Difference]: With dead ends: 139386 [2021-12-06 23:08:24,982 INFO L226 Difference]: Without dead ends: 105569 [2021-12-06 23:08:25,070 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-06 23:08:25,070 INFO L933 BasicCegarLoop]: 809 mSDtfsCounter, 1613 mSDsluCounter, 1699 mSDsCounter, 0 mSdLazyCounter, 2279 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1647 SdHoareTripleChecker+Valid, 2508 SdHoareTripleChecker+Invalid, 2399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 2279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-06 23:08:25,071 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1647 Valid, 2508 Invalid, 2399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 2279 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-06 23:08:25,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105569 states. [2021-12-06 23:08:30,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105569 to 70703. [2021-12-06 23:08:30,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70703 states, 63795 states have (on average 1.5244925150873894) internal successors, (97255), 64090 states have internal predecessors, (97255), 4597 states have call successors, (4597), 1939 states have call predecessors, (4597), 2309 states have return successors, (11684), 4929 states have call predecessors, (11684), 4594 states have call successors, (11684) [2021-12-06 23:08:30,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70703 states to 70703 states and 113536 transitions. [2021-12-06 23:08:30,416 INFO L78 Accepts]: Start accepts. Automaton has 70703 states and 113536 transitions. Word has length 135 [2021-12-06 23:08:30,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:08:30,416 INFO L470 AbstractCegarLoop]: Abstraction has 70703 states and 113536 transitions. [2021-12-06 23:08:30,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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) [2021-12-06 23:08:30,416 INFO L276 IsEmpty]: Start isEmpty. Operand 70703 states and 113536 transitions. [2021-12-06 23:08:30,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-06 23:08:30,438 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:08:30,439 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:08:30,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-06 23:08:30,439 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:08:30,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:08:30,439 INFO L85 PathProgramCache]: Analyzing trace with hash -1221366282, now seen corresponding path program 1 times [2021-12-06 23:08:30,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:08:30,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335624713] [2021-12-06 23:08:30,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:08:30,440 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:08:30,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:30,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 23:08:30,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:30,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 23:08:30,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:30,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 23:08:30,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:30,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-06 23:08:30,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:30,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-06 23:08:30,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:30,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:08:30,509 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:08:30,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335624713] [2021-12-06 23:08:30,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335624713] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:08:30,509 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:08:30,509 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 23:08:30,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491288622] [2021-12-06 23:08:30,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:08:30,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 23:08:30,510 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:08:30,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 23:08:30,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 23:08:30,510 INFO L87 Difference]: Start difference. First operand 70703 states and 113536 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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) [2021-12-06 23:08:48,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:08:48,105 INFO L93 Difference]: Finished difference Result 261111 states and 427857 transitions. [2021-12-06 23:08:48,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 23:08:48,106 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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 135 [2021-12-06 23:08:48,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:08:48,708 INFO L225 Difference]: With dead ends: 261111 [2021-12-06 23:08:48,708 INFO L226 Difference]: Without dead ends: 195165 [2021-12-06 23:08:48,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-06 23:08:48,886 INFO L933 BasicCegarLoop]: 801 mSDtfsCounter, 1531 mSDsluCounter, 1702 mSDsCounter, 0 mSdLazyCounter, 2262 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1565 SdHoareTripleChecker+Valid, 2503 SdHoareTripleChecker+Invalid, 2382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 2262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-06 23:08:48,886 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1565 Valid, 2503 Invalid, 2382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 2262 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-06 23:08:49,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195165 states. [2021-12-06 23:08:58,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195165 to 136369. [2021-12-06 23:08:58,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136369 states, 123829 states have (on average 1.5379515299324067) internal successors, (190443), 124380 states have internal predecessors, (190443), 8437 states have call successors, (8437), 3475 states have call predecessors, (8437), 4101 states have return successors, (28902), 9025 states have call predecessors, (28902), 8434 states have call successors, (28902) [2021-12-06 23:08:59,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136369 states to 136369 states and 227782 transitions. [2021-12-06 23:08:59,326 INFO L78 Accepts]: Start accepts. Automaton has 136369 states and 227782 transitions. Word has length 135 [2021-12-06 23:08:59,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:08:59,327 INFO L470 AbstractCegarLoop]: Abstraction has 136369 states and 227782 transitions. [2021-12-06 23:08:59,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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) [2021-12-06 23:08:59,327 INFO L276 IsEmpty]: Start isEmpty. Operand 136369 states and 227782 transitions. [2021-12-06 23:08:59,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-06 23:08:59,374 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:08:59,375 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:08:59,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-12-06 23:08:59,375 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:08:59,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:08:59,375 INFO L85 PathProgramCache]: Analyzing trace with hash 167927732, now seen corresponding path program 1 times [2021-12-06 23:08:59,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:08:59,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762975760] [2021-12-06 23:08:59,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:08:59,376 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:08:59,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:59,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 23:08:59,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:59,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 23:08:59,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:59,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 23:08:59,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:59,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-06 23:08:59,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:59,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-06 23:08:59,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:08:59,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:08:59,446 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:08:59,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762975760] [2021-12-06 23:08:59,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762975760] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:08:59,446 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:08:59,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 23:08:59,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294930396] [2021-12-06 23:08:59,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:08:59,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 23:08:59,447 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:08:59,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 23:08:59,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-06 23:08:59,447 INFO L87 Difference]: Start difference. First operand 136369 states and 227782 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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) [2021-12-06 23:09:14,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:09:14,125 INFO L93 Difference]: Finished difference Result 306266 states and 529989 transitions. [2021-12-06 23:09:14,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 23:09:14,126 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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 135 [2021-12-06 23:09:14,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:09:14,924 INFO L225 Difference]: With dead ends: 306266 [2021-12-06 23:09:14,924 INFO L226 Difference]: Without dead ends: 174654 [2021-12-06 23:09:15,186 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 [2021-12-06 23:09:15,186 INFO L933 BasicCegarLoop]: 550 mSDtfsCounter, 1027 mSDsluCounter, 926 mSDsCounter, 0 mSdLazyCounter, 1109 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1053 SdHoareTripleChecker+Valid, 1476 SdHoareTripleChecker+Invalid, 1229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 1109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-06 23:09:15,187 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1053 Valid, 1476 Invalid, 1229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 1109 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-06 23:09:15,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174654 states. [2021-12-06 23:09:25,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174654 to 136369. [2021-12-06 23:09:25,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136369 states, 123829 states have (on average 1.5338087200898012) internal successors, (189930), 124380 states have internal predecessors, (189930), 8437 states have call successors, (8437), 3475 states have call predecessors, (8437), 4101 states have return successors, (28902), 9025 states have call predecessors, (28902), 8434 states have call successors, (28902) [2021-12-06 23:09:26,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136369 states to 136369 states and 227269 transitions. [2021-12-06 23:09:26,216 INFO L78 Accepts]: Start accepts. Automaton has 136369 states and 227269 transitions. Word has length 135 [2021-12-06 23:09:26,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:09:26,216 INFO L470 AbstractCegarLoop]: Abstraction has 136369 states and 227269 transitions. [2021-12-06 23:09:26,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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) [2021-12-06 23:09:26,216 INFO L276 IsEmpty]: Start isEmpty. Operand 136369 states and 227269 transitions. [2021-12-06 23:09:26,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-06 23:09:26,261 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:09:26,262 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:09:26,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-12-06 23:09:26,262 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:09:26,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:09:26,262 INFO L85 PathProgramCache]: Analyzing trace with hash -1865466314, now seen corresponding path program 1 times [2021-12-06 23:09:26,262 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:09:26,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832084323] [2021-12-06 23:09:26,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:09:26,263 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:09:26,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:09:26,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 23:09:26,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:09:26,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 23:09:26,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:09:26,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 23:09:26,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:09:26,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-06 23:09:26,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:09:26,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-06 23:09:26,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:09:26,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:09:26,350 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:09:26,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832084323] [2021-12-06 23:09:26,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832084323] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:09:26,350 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:09:26,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 23:09:26,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408093554] [2021-12-06 23:09:26,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:09:26,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 23:09:26,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:09:26,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 23:09:26,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 23:09:26,352 INFO L87 Difference]: Start difference. First operand 136369 states and 227269 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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) [2021-12-06 23:10:00,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:10:00,131 INFO L93 Difference]: Finished difference Result 499829 states and 846673 transitions. [2021-12-06 23:10:00,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 23:10:00,132 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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 135 [2021-12-06 23:10:00,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:10:01,779 INFO L225 Difference]: With dead ends: 499829 [2021-12-06 23:10:01,779 INFO L226 Difference]: Without dead ends: 368217 [2021-12-06 23:10:02,142 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-06 23:10:02,143 INFO L933 BasicCegarLoop]: 850 mSDtfsCounter, 1343 mSDsluCounter, 1702 mSDsCounter, 0 mSdLazyCounter, 2464 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1367 SdHoareTripleChecker+Valid, 2552 SdHoareTripleChecker+Invalid, 2581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 2464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-06 23:10:02,144 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1367 Valid, 2552 Invalid, 2581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 2464 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-06 23:10:02,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368217 states. [2021-12-06 23:10:23,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368217 to 267955. [2021-12-06 23:10:23,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267955 states, 244407 states have (on average 1.5407005527664919) internal successors, (376558), 245470 states have internal predecessors, (376558), 15861 states have call successors, (15861), 6547 states have call predecessors, (15861), 7685 states have return successors, (76204), 16961 states have call predecessors, (76204), 15858 states have call successors, (76204) [2021-12-06 23:10:25,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267955 states to 267955 states and 468623 transitions. [2021-12-06 23:10:25,117 INFO L78 Accepts]: Start accepts. Automaton has 267955 states and 468623 transitions. Word has length 135 [2021-12-06 23:10:25,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:10:25,117 INFO L470 AbstractCegarLoop]: Abstraction has 267955 states and 468623 transitions. [2021-12-06 23:10:25,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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) [2021-12-06 23:10:25,117 INFO L276 IsEmpty]: Start isEmpty. Operand 267955 states and 468623 transitions. [2021-12-06 23:10:25,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-06 23:10:25,212 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:10:25,213 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:10:25,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-12-06 23:10:25,213 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:10:25,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:10:25,213 INFO L85 PathProgramCache]: Analyzing trace with hash 562792308, now seen corresponding path program 1 times [2021-12-06 23:10:25,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:10:25,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413405744] [2021-12-06 23:10:25,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:10:25,214 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:10:25,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:25,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 23:10:25,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:25,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 23:10:25,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:25,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 23:10:25,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:25,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-06 23:10:25,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:25,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-06 23:10:25,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:10:25,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:10:25,285 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:10:25,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413405744] [2021-12-06 23:10:25,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413405744] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:10:25,285 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:10:25,285 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 23:10:25,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288458444] [2021-12-06 23:10:25,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:10:25,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 23:10:25,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:10:25,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 23:10:25,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 23:10:25,286 INFO L87 Difference]: Start difference. First operand 267955 states and 468623 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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) [2021-12-06 23:11:31,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:11:31,739 INFO L93 Difference]: Finished difference Result 975989 states and 1736041 transitions. [2021-12-06 23:11:31,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 23:11:31,740 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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 135 [2021-12-06 23:11:31,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:11:34,744 INFO L225 Difference]: With dead ends: 975989 [2021-12-06 23:11:34,744 INFO L226 Difference]: Without dead ends: 712791 [2021-12-06 23:11:35,720 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-06 23:11:35,721 INFO L933 BasicCegarLoop]: 623 mSDtfsCounter, 1464 mSDsluCounter, 1213 mSDsCounter, 0 mSdLazyCounter, 2027 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1498 SdHoareTripleChecker+Valid, 1836 SdHoareTripleChecker+Invalid, 2177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 2027 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-06 23:11:35,721 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1498 Valid, 1836 Invalid, 2177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 2027 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-06 23:11:36,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 712791 states. [2021-12-06 23:12:20,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 712791 to 530612. [2021-12-06 23:12:21,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 530612 states, 485560 states have (on average 1.5452673202075953) internal successors, (750320), 487647 states have internal predecessors, (750320), 30197 states have call successors, (30197), 12691 states have call predecessors, (30197), 14853 states have return successors, (209662), 32321 states have call predecessors, (209662), 30194 states have call successors, (209662) [2021-12-06 23:12:24,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530612 states to 530612 states and 990179 transitions. [2021-12-06 23:12:24,224 INFO L78 Accepts]: Start accepts. Automaton has 530612 states and 990179 transitions. Word has length 135 [2021-12-06 23:12:24,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:12:24,225 INFO L470 AbstractCegarLoop]: Abstraction has 530612 states and 990179 transitions. [2021-12-06 23:12:24,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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) [2021-12-06 23:12:24,225 INFO L276 IsEmpty]: Start isEmpty. Operand 530612 states and 990179 transitions. [2021-12-06 23:12:24,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-06 23:12:24,484 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:12:24,484 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:12:24,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-12-06 23:12:24,485 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:12:24,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:12:24,485 INFO L85 PathProgramCache]: Analyzing trace with hash -744350090, now seen corresponding path program 1 times [2021-12-06 23:12:24,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:12:24,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239294431] [2021-12-06 23:12:24,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:12:24,486 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:12:24,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:12:24,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 23:12:24,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:12:24,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 23:12:24,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:12:24,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 23:12:24,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:12:24,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-06 23:12:24,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:12:24,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-06 23:12:24,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:12:24,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:12:24,566 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:12:24,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239294431] [2021-12-06 23:12:24,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239294431] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:12:24,567 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:12:24,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 23:12:24,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576389259] [2021-12-06 23:12:24,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:12:24,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 23:12:24,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:12:24,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 23:12:24,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-06 23:12:24,568 INFO L87 Difference]: Start difference. First operand 530612 states and 990179 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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) [2021-12-06 23:13:29,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:13:29,918 INFO L93 Difference]: Finished difference Result 1196634 states and 2365066 transitions. [2021-12-06 23:13:29,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 23:13:29,918 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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 135 [2021-12-06 23:13:29,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:13:33,149 INFO L225 Difference]: With dead ends: 1196634 [2021-12-06 23:13:33,149 INFO L226 Difference]: Without dead ends: 670779 [2021-12-06 23:13:34,802 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 [2021-12-06 23:13:34,802 INFO L933 BasicCegarLoop]: 540 mSDtfsCounter, 1027 mSDsluCounter, 926 mSDsCounter, 0 mSdLazyCounter, 1083 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1053 SdHoareTripleChecker+Valid, 1466 SdHoareTripleChecker+Invalid, 1203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 1083 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:13:34,803 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1053 Valid, 1466 Invalid, 1203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 1083 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-06 23:13:35,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670779 states. [2021-12-06 23:14:23,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670779 to 530612. [2021-12-06 23:14:23,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 530612 states, 485560 states have (on average 1.541047450366587) internal successors, (748271), 487647 states have internal predecessors, (748271), 30197 states have call successors, (30197), 12691 states have call predecessors, (30197), 14853 states have return successors, (209662), 32321 states have call predecessors, (209662), 30194 states have call successors, (209662) [2021-12-06 23:14:26,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530612 states to 530612 states and 988130 transitions. [2021-12-06 23:14:26,472 INFO L78 Accepts]: Start accepts. Automaton has 530612 states and 988130 transitions. Word has length 135 [2021-12-06 23:14:26,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:14:26,473 INFO L470 AbstractCegarLoop]: Abstraction has 530612 states and 988130 transitions. [2021-12-06 23:14:26,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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) [2021-12-06 23:14:26,473 INFO L276 IsEmpty]: Start isEmpty. Operand 530612 states and 988130 transitions. [2021-12-06 23:14:26,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-06 23:14:26,798 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:14:26,798 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:14:26,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-12-06 23:14:26,798 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:14:26,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:14:26,799 INFO L85 PathProgramCache]: Analyzing trace with hash 1153146676, now seen corresponding path program 1 times [2021-12-06 23:14:26,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:14:26,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631665837] [2021-12-06 23:14:26,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:14:26,799 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:14:26,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:14:26,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 23:14:26,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:14:26,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 23:14:26,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:14:26,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 23:14:26,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:14:26,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-06 23:14:26,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:14:26,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-06 23:14:26,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:14:26,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:14:26,887 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:14:26,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631665837] [2021-12-06 23:14:26,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631665837] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:14:26,887 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:14:26,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 23:14:26,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395977139] [2021-12-06 23:14:26,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:14:26,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 23:14:26,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:14:26,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 23:14:26,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-06 23:14:26,888 INFO L87 Difference]: Start difference. First operand 530612 states and 988130 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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) [2021-12-06 23:15:33,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:15:33,402 INFO L93 Difference]: Finished difference Result 1194584 states and 2354819 transitions. [2021-12-06 23:15:33,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 23:15:33,402 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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 135 [2021-12-06 23:15:33,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:15:36,555 INFO L225 Difference]: With dead ends: 1194584 [2021-12-06 23:15:36,555 INFO L226 Difference]: Without dead ends: 668729 [2021-12-06 23:15:38,220 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-06 23:15:38,220 INFO L933 BasicCegarLoop]: 537 mSDtfsCounter, 1195 mSDsluCounter, 721 mSDsCounter, 0 mSdLazyCounter, 963 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1221 SdHoareTripleChecker+Valid, 1258 SdHoareTripleChecker+Invalid, 1119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 963 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-06 23:15:38,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1221 Valid, 1258 Invalid, 1119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 963 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-06 23:15:38,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668729 states. [2021-12-06 23:16:27,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668729 to 530612. [2021-12-06 23:16:27,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 530612 states, 485560 states have (on average 1.5368275805255787) internal successors, (746222), 487647 states have internal predecessors, (746222), 30197 states have call successors, (30197), 12691 states have call predecessors, (30197), 14853 states have return successors, (209662), 32321 states have call predecessors, (209662), 30194 states have call successors, (209662) [2021-12-06 23:16:30,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530612 states to 530612 states and 986081 transitions. [2021-12-06 23:16:30,415 INFO L78 Accepts]: Start accepts. Automaton has 530612 states and 986081 transitions. Word has length 135 [2021-12-06 23:16:30,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:16:30,415 INFO L470 AbstractCegarLoop]: Abstraction has 530612 states and 986081 transitions. [2021-12-06 23:16:30,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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) [2021-12-06 23:16:30,415 INFO L276 IsEmpty]: Start isEmpty. Operand 530612 states and 986081 transitions. [2021-12-06 23:16:30,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-06 23:16:30,612 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:16:30,613 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:16:30,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-12-06 23:16:30,613 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:16:30,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:16:30,613 INFO L85 PathProgramCache]: Analyzing trace with hash -2110779722, now seen corresponding path program 1 times [2021-12-06 23:16:30,613 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:16:30,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476030134] [2021-12-06 23:16:30,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:16:30,614 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:16:30,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:16:30,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 23:16:30,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:16:30,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 23:16:30,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:16:30,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 23:16:30,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:16:30,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-06 23:16:30,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:16:30,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-06 23:16:30,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:16:30,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:16:30,699 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:16:30,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476030134] [2021-12-06 23:16:30,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476030134] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:16:30,699 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:16:30,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 23:16:30,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428903852] [2021-12-06 23:16:30,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:16:30,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 23:16:30,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:16:30,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 23:16:30,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 23:16:30,700 INFO L87 Difference]: Start difference. First operand 530612 states and 986081 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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)