./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/token_ring.09.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18ef9aca-e6ae-4d65-80a0-8d5200a28cd8/bin/uautomizer-YU5uOKAj3y/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18ef9aca-e6ae-4d65-80a0-8d5200a28cd8/bin/uautomizer-YU5uOKAj3y/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18ef9aca-e6ae-4d65-80a0-8d5200a28cd8/bin/uautomizer-YU5uOKAj3y/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18ef9aca-e6ae-4d65-80a0-8d5200a28cd8/bin/uautomizer-YU5uOKAj3y/config/AutomizerReach.xml -i ../../sv-benchmarks/c/systemc/token_ring.09.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18ef9aca-e6ae-4d65-80a0-8d5200a28cd8/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18ef9aca-e6ae-4d65-80a0-8d5200a28cd8/bin/uautomizer-YU5uOKAj3y --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 ae06fa96255229a08f1e8c01eaa7f353b1ba462dacd64e058a3c6957598773d9 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 17:53:36,374 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 17:53:36,377 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 17:53:36,435 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 17:53:36,436 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 17:53:36,441 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 17:53:36,443 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 17:53:36,447 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 17:53:36,451 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 17:53:36,461 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 17:53:36,462 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 17:53:36,465 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 17:53:36,465 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 17:53:36,468 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 17:53:36,470 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 17:53:36,480 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 17:53:36,481 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 17:53:36,482 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 17:53:36,484 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 17:53:36,486 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 17:53:36,488 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 17:53:36,491 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 17:53:36,494 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 17:53:36,496 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 17:53:36,507 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 17:53:36,508 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 17:53:36,508 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 17:53:36,511 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 17:53:36,511 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 17:53:36,513 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 17:53:36,513 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 17:53:36,514 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 17:53:36,516 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 17:53:36,518 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 17:53:36,519 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 17:53:36,520 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 17:53:36,521 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 17:53:36,521 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 17:53:36,521 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 17:53:36,522 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 17:53:36,523 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 17:53:36,524 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18ef9aca-e6ae-4d65-80a0-8d5200a28cd8/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-13 17:53:36,574 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 17:53:36,574 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 17:53:36,575 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-13 17:53:36,575 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-13 17:53:36,576 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 17:53:36,577 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 17:53:36,578 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-13 17:53:36,578 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-13 17:53:36,578 INFO L138 SettingsManager]: * Use SBE=true [2021-11-13 17:53:36,578 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 17:53:36,579 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 17:53:36,580 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 17:53:36,580 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 17:53:36,580 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 17:53:36,580 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 17:53:36,581 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 17:53:36,581 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 17:53:36,581 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 17:53:36,581 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 17:53:36,581 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 17:53:36,582 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 17:53:36,582 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 17:53:36,582 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 17:53:36,582 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 17:53:36,582 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 17:53:36,583 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 17:53:36,583 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 17:53:36,583 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 17:53:36,583 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-13 17:53:36,585 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 17:53:36,585 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-13 17:53:36,585 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-13 17:53:36,586 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 17:53:36,586 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 17:53:36,586 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_18ef9aca-e6ae-4d65-80a0-8d5200a28cd8/bin/uautomizer-YU5uOKAj3y/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18ef9aca-e6ae-4d65-80a0-8d5200a28cd8/bin/uautomizer-YU5uOKAj3y Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ae06fa96255229a08f1e8c01eaa7f353b1ba462dacd64e058a3c6957598773d9 [2021-11-13 17:53:36,874 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 17:53:36,897 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 17:53:36,900 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 17:53:36,902 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 17:53:36,902 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 17:53:36,904 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18ef9aca-e6ae-4d65-80a0-8d5200a28cd8/bin/uautomizer-YU5uOKAj3y/../../sv-benchmarks/c/systemc/token_ring.09.cil-2.c [2021-11-13 17:53:36,965 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18ef9aca-e6ae-4d65-80a0-8d5200a28cd8/bin/uautomizer-YU5uOKAj3y/data/ec8a97401/d10bc925ee53401091521865f79c10bb/FLAGeef8cfb9f [2021-11-13 17:53:37,497 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 17:53:37,498 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18ef9aca-e6ae-4d65-80a0-8d5200a28cd8/sv-benchmarks/c/systemc/token_ring.09.cil-2.c [2021-11-13 17:53:37,513 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18ef9aca-e6ae-4d65-80a0-8d5200a28cd8/bin/uautomizer-YU5uOKAj3y/data/ec8a97401/d10bc925ee53401091521865f79c10bb/FLAGeef8cfb9f [2021-11-13 17:53:37,822 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18ef9aca-e6ae-4d65-80a0-8d5200a28cd8/bin/uautomizer-YU5uOKAj3y/data/ec8a97401/d10bc925ee53401091521865f79c10bb [2021-11-13 17:53:37,825 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 17:53:37,827 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 17:53:37,837 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 17:53:37,837 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 17:53:37,840 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 17:53:37,841 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 05:53:37" (1/1) ... [2021-11-13 17:53:37,842 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f0f5014 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:53:37, skipping insertion in model container [2021-11-13 17:53:37,843 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 05:53:37" (1/1) ... [2021-11-13 17:53:37,853 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 17:53:37,901 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 17:53:38,082 WARN L228 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_18ef9aca-e6ae-4d65-80a0-8d5200a28cd8/sv-benchmarks/c/systemc/token_ring.09.cil-2.c[671,684] [2021-11-13 17:53:38,234 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 17:53:38,252 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 17:53:38,265 WARN L228 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_18ef9aca-e6ae-4d65-80a0-8d5200a28cd8/sv-benchmarks/c/systemc/token_ring.09.cil-2.c[671,684] [2021-11-13 17:53:38,334 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 17:53:38,357 INFO L208 MainTranslator]: Completed translation [2021-11-13 17:53:38,358 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:53:38 WrapperNode [2021-11-13 17:53:38,358 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 17:53:38,360 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 17:53:38,360 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 17:53:38,360 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 17:53:38,369 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:53:38" (1/1) ... [2021-11-13 17:53:38,385 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:53:38" (1/1) ... [2021-11-13 17:53:38,460 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 17:53:38,463 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 17:53:38,464 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 17:53:38,464 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 17:53:38,474 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:53:38" (1/1) ... [2021-11-13 17:53:38,474 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:53:38" (1/1) ... [2021-11-13 17:53:38,479 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:53:38" (1/1) ... [2021-11-13 17:53:38,480 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:53:38" (1/1) ... [2021-11-13 17:53:38,498 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:53:38" (1/1) ... [2021-11-13 17:53:38,533 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:53:38" (1/1) ... [2021-11-13 17:53:38,537 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:53:38" (1/1) ... [2021-11-13 17:53:38,545 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 17:53:38,546 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 17:53:38,546 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 17:53:38,546 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 17:53:38,549 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:53:38" (1/1) ... [2021-11-13 17:53:38,572 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 17:53:38,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18ef9aca-e6ae-4d65-80a0-8d5200a28cd8/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:53:38,605 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18ef9aca-e6ae-4d65-80a0-8d5200a28cd8/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 17:53:38,617 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18ef9aca-e6ae-4d65-80a0-8d5200a28cd8/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 17:53:38,661 INFO L130 BoogieDeclarations]: Found specification of procedure error [2021-11-13 17:53:38,661 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2021-11-13 17:53:38,661 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 17:53:38,662 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2021-11-13 17:53:38,662 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2021-11-13 17:53:38,662 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2021-11-13 17:53:38,662 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2021-11-13 17:53:38,662 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-11-13 17:53:38,663 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-11-13 17:53:38,663 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2021-11-13 17:53:38,663 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2021-11-13 17:53:38,663 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2021-11-13 17:53:38,664 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2021-11-13 17:53:38,664 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-13 17:53:38,664 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2021-11-13 17:53:38,664 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2021-11-13 17:53:38,664 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 17:53:38,665 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 17:53:39,669 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 17:53:39,669 INFO L299 CfgBuilder]: Removed 12 assume(true) statements. [2021-11-13 17:53:39,673 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 05:53:39 BoogieIcfgContainer [2021-11-13 17:53:39,673 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 17:53:39,675 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 17:53:39,675 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 17:53:39,679 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 17:53:39,679 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 05:53:37" (1/3) ... [2021-11-13 17:53:39,681 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28ef22fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 05:53:39, skipping insertion in model container [2021-11-13 17:53:39,681 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:53:38" (2/3) ... [2021-11-13 17:53:39,681 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28ef22fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 05:53:39, skipping insertion in model container [2021-11-13 17:53:39,682 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 05:53:39" (3/3) ... [2021-11-13 17:53:39,685 INFO L111 eAbstractionObserver]: Analyzing ICFG token_ring.09.cil-2.c [2021-11-13 17:53:39,692 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 17:53:39,692 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-13 17:53:39,747 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 17:53:39,755 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-13 17:53:39,755 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-13 17:53:39,786 INFO L276 IsEmpty]: Start isEmpty. Operand has 315 states, 281 states have (on average 1.6583629893238434) internal successors, (466), 285 states have internal predecessors, (466), 25 states have call successors, (25), 7 states have call predecessors, (25), 7 states have return successors, (25), 24 states have call predecessors, (25), 25 states have call successors, (25) [2021-11-13 17:53:39,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-13 17:53:39,804 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:53:39,804 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:53:39,805 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:53:39,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:53:39,811 INFO L85 PathProgramCache]: Analyzing trace with hash 1520697994, now seen corresponding path program 1 times [2021-11-13 17:53:39,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:53:39,822 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654480619] [2021-11-13 17:53:39,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:53:39,823 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:53:40,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:40,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 17:53:40,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:40,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-13 17:53:40,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:40,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-13 17:53:40,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:40,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-11-13 17:53:40,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:40,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2021-11-13 17:53:40,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:40,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:53:40,484 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:53:40,484 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654480619] [2021-11-13 17:53:40,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654480619] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:53:40,485 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:53:40,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 17:53:40,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831107954] [2021-11-13 17:53:40,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:53:40,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 17:53:40,493 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:53:40,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 17:53:40,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 17:53:40,544 INFO L87 Difference]: Start difference. First operand has 315 states, 281 states have (on average 1.6583629893238434) internal successors, (466), 285 states have internal predecessors, (466), 25 states have call successors, (25), 7 states have call predecessors, (25), 7 states have return successors, (25), 24 states have call predecessors, (25), 25 states have call successors, (25) Second operand has 5 states, 5 states have (on average 26.8) internal successors, (134), 3 states have internal predecessors, (134), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 17:53:42,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:53:42,167 INFO L93 Difference]: Finished difference Result 725 states and 1199 transitions. [2021-11-13 17:53:42,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 17:53:42,170 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 26.8) internal successors, (134), 3 states have internal predecessors, (134), 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 145 [2021-11-13 17:53:42,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:53:42,190 INFO L225 Difference]: With dead ends: 725 [2021-11-13 17:53:42,191 INFO L226 Difference]: Without dead ends: 418 [2021-11-13 17:53:42,198 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-13 17:53:42,202 INFO L933 BasicCegarLoop]: 534 mSDtfsCounter, 817 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 547 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1047.67ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 838 SdHoareTripleChecker+Valid, 888 SdHoareTripleChecker+Invalid, 605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 48.57ms SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1211.30ms IncrementalHoareTripleChecker+Time [2021-11-13 17:53:42,204 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [838 Valid, 888 Invalid, 605 Unknown, 0 Unchecked, 48.57ms Time], IncrementalHoareTripleChecker [58 Valid, 547 Invalid, 0 Unknown, 0 Unchecked, 1211.30ms Time] [2021-11-13 17:53:42,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2021-11-13 17:53:42,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 309. [2021-11-13 17:53:42,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 277 states have (on average 1.5703971119133573) internal successors, (435), 279 states have internal predecessors, (435), 25 states have call successors, (25), 7 states have call predecessors, (25), 6 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2021-11-13 17:53:42,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 483 transitions. [2021-11-13 17:53:42,304 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 483 transitions. Word has length 145 [2021-11-13 17:53:42,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:53:42,304 INFO L470 AbstractCegarLoop]: Abstraction has 309 states and 483 transitions. [2021-11-13 17:53:42,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.8) internal successors, (134), 3 states have internal predecessors, (134), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 17:53:42,305 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 483 transitions. [2021-11-13 17:53:42,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-13 17:53:42,310 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:53:42,310 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:53:42,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-13 17:53:42,311 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:53:42,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:53:42,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1231878604, now seen corresponding path program 1 times [2021-11-13 17:53:42,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:53:42,313 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421389176] [2021-11-13 17:53:42,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:53:42,313 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:53:42,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:42,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 17:53:42,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:42,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-13 17:53:42,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:42,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-13 17:53:42,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:42,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-11-13 17:53:42,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:42,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2021-11-13 17:53:42,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:42,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:53:42,616 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:53:42,616 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421389176] [2021-11-13 17:53:42,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421389176] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:53:42,617 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:53:42,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-13 17:53:42,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177291228] [2021-11-13 17:53:42,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:53:42,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 17:53:42,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:53:42,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 17:53:42,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-13 17:53:42,620 INFO L87 Difference]: Start difference. First operand 309 states and 483 transitions. Second operand has 6 states, 6 states have (on average 22.333333333333332) internal successors, (134), 4 states have internal predecessors, (134), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 17:53:44,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:53:44,331 INFO L93 Difference]: Finished difference Result 709 states and 1126 transitions. [2021-11-13 17:53:44,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 17:53:44,332 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 22.333333333333332) internal successors, (134), 4 states have internal predecessors, (134), 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 145 [2021-11-13 17:53:44,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:53:44,337 INFO L225 Difference]: With dead ends: 709 [2021-11-13 17:53:44,337 INFO L226 Difference]: Without dead ends: 417 [2021-11-13 17:53:44,341 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-13 17:53:44,343 INFO L933 BasicCegarLoop]: 492 mSDtfsCounter, 804 mSDsluCounter, 556 mSDsCounter, 0 mSdLazyCounter, 1036 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1185.94ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 821 SdHoareTripleChecker+Valid, 1048 SdHoareTripleChecker+Invalid, 1100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 23.01ms SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1036 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1426.26ms IncrementalHoareTripleChecker+Time [2021-11-13 17:53:44,344 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [821 Valid, 1048 Invalid, 1100 Unknown, 0 Unchecked, 23.01ms Time], IncrementalHoareTripleChecker [64 Valid, 1036 Invalid, 0 Unknown, 0 Unchecked, 1426.26ms Time] [2021-11-13 17:53:44,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2021-11-13 17:53:44,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 309. [2021-11-13 17:53:44,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 277 states have (on average 1.5667870036101084) internal successors, (434), 279 states have internal predecessors, (434), 25 states have call successors, (25), 7 states have call predecessors, (25), 6 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2021-11-13 17:53:44,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 482 transitions. [2021-11-13 17:53:44,403 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 482 transitions. Word has length 145 [2021-11-13 17:53:44,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:53:44,403 INFO L470 AbstractCegarLoop]: Abstraction has 309 states and 482 transitions. [2021-11-13 17:53:44,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.333333333333332) internal successors, (134), 4 states have internal predecessors, (134), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 17:53:44,404 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 482 transitions. [2021-11-13 17:53:44,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-13 17:53:44,406 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:53:44,407 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:53:44,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-13 17:53:44,407 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:53:44,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:53:44,408 INFO L85 PathProgramCache]: Analyzing trace with hash 802220298, now seen corresponding path program 1 times [2021-11-13 17:53:44,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:53:44,408 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962233544] [2021-11-13 17:53:44,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:53:44,409 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:53:44,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:44,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 17:53:44,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:44,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-13 17:53:44,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:44,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-13 17:53:44,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:44,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-11-13 17:53:44,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:44,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2021-11-13 17:53:44,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:44,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:53:44,617 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:53:44,617 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962233544] [2021-11-13 17:53:44,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962233544] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:53:44,618 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:53:44,619 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 17:53:44,619 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356673064] [2021-11-13 17:53:44,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:53:44,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 17:53:44,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:53:44,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 17:53:44,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-13 17:53:44,623 INFO L87 Difference]: Start difference. First operand 309 states and 482 transitions. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 5 states have internal predecessors, (134), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 17:53:46,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:53:46,168 INFO L93 Difference]: Finished difference Result 728 states and 1161 transitions. [2021-11-13 17:53:46,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 17:53:46,169 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 5 states have internal predecessors, (134), 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 145 [2021-11-13 17:53:46,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:53:46,178 INFO L225 Difference]: With dead ends: 728 [2021-11-13 17:53:46,179 INFO L226 Difference]: Without dead ends: 436 [2021-11-13 17:53:46,181 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-13 17:53:46,182 INFO L933 BasicCegarLoop]: 523 mSDtfsCounter, 1004 mSDsluCounter, 613 mSDsCounter, 0 mSdLazyCounter, 1058 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1092.03ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1021 SdHoareTripleChecker+Valid, 1136 SdHoareTripleChecker+Invalid, 1151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 17.18ms SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 1058 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1281.11ms IncrementalHoareTripleChecker+Time [2021-11-13 17:53:46,183 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1021 Valid, 1136 Invalid, 1151 Unknown, 0 Unchecked, 17.18ms Time], IncrementalHoareTripleChecker [93 Valid, 1058 Invalid, 0 Unknown, 0 Unchecked, 1281.11ms Time] [2021-11-13 17:53:46,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2021-11-13 17:53:46,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 309. [2021-11-13 17:53:46,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 277 states have (on average 1.5631768953068592) internal successors, (433), 279 states have internal predecessors, (433), 25 states have call successors, (25), 7 states have call predecessors, (25), 6 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2021-11-13 17:53:46,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 481 transitions. [2021-11-13 17:53:46,234 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 481 transitions. Word has length 145 [2021-11-13 17:53:46,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:53:46,235 INFO L470 AbstractCegarLoop]: Abstraction has 309 states and 481 transitions. [2021-11-13 17:53:46,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 5 states have internal predecessors, (134), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 17:53:46,236 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 481 transitions. [2021-11-13 17:53:46,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-13 17:53:46,238 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:53:46,239 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:53:46,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-13 17:53:46,239 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:53:46,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:53:46,240 INFO L85 PathProgramCache]: Analyzing trace with hash 95623692, now seen corresponding path program 1 times [2021-11-13 17:53:46,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:53:46,241 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639460485] [2021-11-13 17:53:46,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:53:46,241 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:53:46,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:46,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 17:53:46,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:46,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-13 17:53:46,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:46,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-13 17:53:46,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:46,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-11-13 17:53:46,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:46,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2021-11-13 17:53:46,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:46,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:53:46,403 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:53:46,404 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639460485] [2021-11-13 17:53:46,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639460485] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:53:46,405 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:53:46,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 17:53:46,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930838290] [2021-11-13 17:53:46,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:53:46,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 17:53:46,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:53:46,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 17:53:46,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-13 17:53:46,408 INFO L87 Difference]: Start difference. First operand 309 states and 481 transitions. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 5 states have internal predecessors, (134), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 17:53:47,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:53:47,951 INFO L93 Difference]: Finished difference Result 707 states and 1120 transitions. [2021-11-13 17:53:47,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 17:53:47,952 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 5 states have internal predecessors, (134), 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 145 [2021-11-13 17:53:47,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:53:47,956 INFO L225 Difference]: With dead ends: 707 [2021-11-13 17:53:47,956 INFO L226 Difference]: Without dead ends: 415 [2021-11-13 17:53:47,958 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-13 17:53:47,962 INFO L933 BasicCegarLoop]: 482 mSDtfsCounter, 870 mSDsluCounter, 775 mSDsCounter, 0 mSdLazyCounter, 1063 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1130.84ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 887 SdHoareTripleChecker+Valid, 1257 SdHoareTripleChecker+Invalid, 1130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 15.47ms SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1063 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1317.16ms IncrementalHoareTripleChecker+Time [2021-11-13 17:53:47,968 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [887 Valid, 1257 Invalid, 1130 Unknown, 0 Unchecked, 15.47ms Time], IncrementalHoareTripleChecker [67 Valid, 1063 Invalid, 0 Unknown, 0 Unchecked, 1317.16ms Time] [2021-11-13 17:53:47,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2021-11-13 17:53:48,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 309. [2021-11-13 17:53:48,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 277 states have (on average 1.552346570397112) internal successors, (430), 279 states have internal predecessors, (430), 25 states have call successors, (25), 7 states have call predecessors, (25), 6 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2021-11-13 17:53:48,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 478 transitions. [2021-11-13 17:53:48,015 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 478 transitions. Word has length 145 [2021-11-13 17:53:48,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:53:48,016 INFO L470 AbstractCegarLoop]: Abstraction has 309 states and 478 transitions. [2021-11-13 17:53:48,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 5 states have internal predecessors, (134), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 17:53:48,017 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 478 transitions. [2021-11-13 17:53:48,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-13 17:53:48,022 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:53:48,030 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:53:48,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-13 17:53:48,033 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:53:48,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:53:48,034 INFO L85 PathProgramCache]: Analyzing trace with hash 13302280, now seen corresponding path program 1 times [2021-11-13 17:53:48,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:53:48,036 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778619940] [2021-11-13 17:53:48,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:53:48,036 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:53:48,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:48,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 17:53:48,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:48,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-13 17:53:48,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:48,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-13 17:53:48,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:48,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-11-13 17:53:48,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:48,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2021-11-13 17:53:48,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:48,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:53:48,223 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:53:48,223 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778619940] [2021-11-13 17:53:48,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778619940] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:53:48,223 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:53:48,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-13 17:53:48,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131007547] [2021-11-13 17:53:48,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:53:48,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 17:53:48,225 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:53:48,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 17:53:48,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-13 17:53:48,226 INFO L87 Difference]: Start difference. First operand 309 states and 478 transitions. Second operand has 8 states, 8 states have (on average 16.75) internal successors, (134), 6 states have internal predecessors, (134), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 17:53:51,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:53:51,076 INFO L93 Difference]: Finished difference Result 1137 states and 1801 transitions. [2021-11-13 17:53:51,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-13 17:53:51,077 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 16.75) internal successors, (134), 6 states have internal predecessors, (134), 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 145 [2021-11-13 17:53:51,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:53:51,084 INFO L225 Difference]: With dead ends: 1137 [2021-11-13 17:53:51,084 INFO L226 Difference]: Without dead ends: 845 [2021-11-13 17:53:51,086 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-11-13 17:53:51,087 INFO L933 BasicCegarLoop]: 805 mSDtfsCounter, 1559 mSDsluCounter, 1859 mSDsCounter, 0 mSdLazyCounter, 2228 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1861.83ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1576 SdHoareTripleChecker+Valid, 2664 SdHoareTripleChecker+Invalid, 2330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 27.34ms SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 2228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2219.56ms IncrementalHoareTripleChecker+Time [2021-11-13 17:53:51,088 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1576 Valid, 2664 Invalid, 2330 Unknown, 0 Unchecked, 27.34ms Time], IncrementalHoareTripleChecker [102 Valid, 2228 Invalid, 0 Unknown, 0 Unchecked, 2219.56ms Time] [2021-11-13 17:53:51,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 845 states. [2021-11-13 17:53:51,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 845 to 613. [2021-11-13 17:53:51,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 613 states, 555 states have (on average 1.5621621621621622) internal successors, (867), 558 states have internal predecessors, (867), 44 states have call successors, (44), 13 states have call predecessors, (44), 13 states have return successors, (45), 43 states have call predecessors, (45), 42 states have call successors, (45) [2021-11-13 17:53:51,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 613 states to 613 states and 956 transitions. [2021-11-13 17:53:51,154 INFO L78 Accepts]: Start accepts. Automaton has 613 states and 956 transitions. Word has length 145 [2021-11-13 17:53:51,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:53:51,155 INFO L470 AbstractCegarLoop]: Abstraction has 613 states and 956 transitions. [2021-11-13 17:53:51,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.75) internal successors, (134), 6 states have internal predecessors, (134), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 17:53:51,155 INFO L276 IsEmpty]: Start isEmpty. Operand 613 states and 956 transitions. [2021-11-13 17:53:51,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-13 17:53:51,158 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:53:51,158 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:53:51,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-13 17:53:51,159 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:53:51,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:53:51,159 INFO L85 PathProgramCache]: Analyzing trace with hash 875135882, now seen corresponding path program 1 times [2021-11-13 17:53:51,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:53:51,160 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695926205] [2021-11-13 17:53:51,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:53:51,160 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:53:51,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:51,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 17:53:51,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:51,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-13 17:53:51,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:51,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-13 17:53:51,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:51,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-11-13 17:53:51,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:51,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2021-11-13 17:53:51,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:51,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:53:51,306 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:53:51,306 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695926205] [2021-11-13 17:53:51,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695926205] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:53:51,307 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:53:51,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 17:53:51,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802955716] [2021-11-13 17:53:51,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:53:51,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 17:53:51,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:53:51,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 17:53:51,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-13 17:53:51,309 INFO L87 Difference]: Start difference. First operand 613 states and 956 transitions. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 5 states have internal predecessors, (134), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 17:53:52,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:53:52,792 INFO L93 Difference]: Finished difference Result 1470 states and 2341 transitions. [2021-11-13 17:53:52,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 17:53:52,793 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 5 states have internal predecessors, (134), 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 145 [2021-11-13 17:53:52,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:53:52,802 INFO L225 Difference]: With dead ends: 1470 [2021-11-13 17:53:52,803 INFO L226 Difference]: Without dead ends: 874 [2021-11-13 17:53:52,806 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-13 17:53:52,807 INFO L933 BasicCegarLoop]: 507 mSDtfsCounter, 1000 mSDsluCounter, 610 mSDsCounter, 0 mSdLazyCounter, 1022 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1038.28ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1017 SdHoareTripleChecker+Valid, 1117 SdHoareTripleChecker+Invalid, 1122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.08ms SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 1022 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1209.86ms IncrementalHoareTripleChecker+Time [2021-11-13 17:53:52,810 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1017 Valid, 1117 Invalid, 1122 Unknown, 0 Unchecked, 12.08ms Time], IncrementalHoareTripleChecker [100 Valid, 1022 Invalid, 0 Unknown, 0 Unchecked, 1209.86ms Time] [2021-11-13 17:53:52,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 874 states. [2021-11-13 17:53:52,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 874 to 613. [2021-11-13 17:53:52,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 613 states, 555 states have (on average 1.5585585585585586) internal successors, (865), 558 states have internal predecessors, (865), 44 states have call successors, (44), 13 states have call predecessors, (44), 13 states have return successors, (45), 43 states have call predecessors, (45), 42 states have call successors, (45) [2021-11-13 17:53:52,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 613 states to 613 states and 954 transitions. [2021-11-13 17:53:52,898 INFO L78 Accepts]: Start accepts. Automaton has 613 states and 954 transitions. Word has length 145 [2021-11-13 17:53:52,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:53:52,900 INFO L470 AbstractCegarLoop]: Abstraction has 613 states and 954 transitions. [2021-11-13 17:53:52,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 5 states have internal predecessors, (134), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 17:53:52,900 INFO L276 IsEmpty]: Start isEmpty. Operand 613 states and 954 transitions. [2021-11-13 17:53:52,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-13 17:53:52,903 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:53:52,903 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:53:52,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-13 17:53:52,904 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:53:52,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:53:52,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1175273016, now seen corresponding path program 1 times [2021-11-13 17:53:52,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:53:52,905 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108359661] [2021-11-13 17:53:52,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:53:52,905 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:53:52,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:52,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 17:53:52,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:52,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-13 17:53:53,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:53,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-13 17:53:53,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:53,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-11-13 17:53:53,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:53,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2021-11-13 17:53:53,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:53,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:53:53,093 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:53:53,093 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108359661] [2021-11-13 17:53:53,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108359661] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:53:53,094 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:53:53,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 17:53:53,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740186918] [2021-11-13 17:53:53,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:53:53,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 17:53:53,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:53:53,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 17:53:53,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-13 17:53:53,098 INFO L87 Difference]: Start difference. First operand 613 states and 954 transitions. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 5 states have internal predecessors, (134), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 17:53:54,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:53:54,494 INFO L93 Difference]: Finished difference Result 1464 states and 2324 transitions. [2021-11-13 17:53:54,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 17:53:54,495 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 5 states have internal predecessors, (134), 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 145 [2021-11-13 17:53:54,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:53:54,505 INFO L225 Difference]: With dead ends: 1464 [2021-11-13 17:53:54,505 INFO L226 Difference]: Without dead ends: 868 [2021-11-13 17:53:54,508 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-13 17:53:54,511 INFO L933 BasicCegarLoop]: 472 mSDtfsCounter, 1050 mSDsluCounter, 608 mSDsCounter, 0 mSdLazyCounter, 977 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 963.25ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1067 SdHoareTripleChecker+Valid, 1080 SdHoareTripleChecker+Invalid, 1079 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.78ms SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 977 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1115.68ms IncrementalHoareTripleChecker+Time [2021-11-13 17:53:54,512 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1067 Valid, 1080 Invalid, 1079 Unknown, 0 Unchecked, 11.78ms Time], IncrementalHoareTripleChecker [102 Valid, 977 Invalid, 0 Unknown, 0 Unchecked, 1115.68ms Time] [2021-11-13 17:53:54,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 868 states. [2021-11-13 17:53:54,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 868 to 613. [2021-11-13 17:53:54,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 613 states, 555 states have (on average 1.554954954954955) internal successors, (863), 558 states have internal predecessors, (863), 44 states have call successors, (44), 13 states have call predecessors, (44), 13 states have return successors, (45), 43 states have call predecessors, (45), 42 states have call successors, (45) [2021-11-13 17:53:54,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 613 states to 613 states and 952 transitions. [2021-11-13 17:53:54,587 INFO L78 Accepts]: Start accepts. Automaton has 613 states and 952 transitions. Word has length 145 [2021-11-13 17:53:54,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:53:54,588 INFO L470 AbstractCegarLoop]: Abstraction has 613 states and 952 transitions. [2021-11-13 17:53:54,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 5 states have internal predecessors, (134), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 17:53:54,588 INFO L276 IsEmpty]: Start isEmpty. Operand 613 states and 952 transitions. [2021-11-13 17:53:54,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-13 17:53:54,591 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:53:54,591 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:53:54,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-13 17:53:54,591 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:53:54,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:53:54,593 INFO L85 PathProgramCache]: Analyzing trace with hash 2027059078, now seen corresponding path program 1 times [2021-11-13 17:53:54,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:53:54,593 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144522532] [2021-11-13 17:53:54,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:53:54,594 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:53:54,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:54,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 17:53:54,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:54,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-13 17:53:54,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:54,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-13 17:53:54,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:54,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-11-13 17:53:54,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:54,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2021-11-13 17:53:54,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:54,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:53:54,787 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:53:54,787 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144522532] [2021-11-13 17:53:54,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144522532] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:53:54,788 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:53:54,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 17:53:54,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696666] [2021-11-13 17:53:54,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:53:54,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 17:53:54,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:53:54,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 17:53:54,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-13 17:53:54,790 INFO L87 Difference]: Start difference. First operand 613 states and 952 transitions. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 5 states have internal predecessors, (134), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 17:53:56,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:53:56,214 INFO L93 Difference]: Finished difference Result 1461 states and 2312 transitions. [2021-11-13 17:53:56,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 17:53:56,215 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 5 states have internal predecessors, (134), 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 145 [2021-11-13 17:53:56,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:53:56,222 INFO L225 Difference]: With dead ends: 1461 [2021-11-13 17:53:56,222 INFO L226 Difference]: Without dead ends: 865 [2021-11-13 17:53:56,224 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-13 17:53:56,225 INFO L933 BasicCegarLoop]: 497 mSDtfsCounter, 994 mSDsluCounter, 610 mSDsCounter, 0 mSdLazyCounter, 998 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 986.98ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1011 SdHoareTripleChecker+Valid, 1107 SdHoareTripleChecker+Invalid, 1098 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.33ms SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 998 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1145.27ms IncrementalHoareTripleChecker+Time [2021-11-13 17:53:56,226 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1011 Valid, 1107 Invalid, 1098 Unknown, 0 Unchecked, 12.33ms Time], IncrementalHoareTripleChecker [100 Valid, 998 Invalid, 0 Unknown, 0 Unchecked, 1145.27ms Time] [2021-11-13 17:53:56,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 865 states. [2021-11-13 17:53:56,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 865 to 613. [2021-11-13 17:53:56,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 613 states, 555 states have (on average 1.5513513513513513) internal successors, (861), 558 states have internal predecessors, (861), 44 states have call successors, (44), 13 states have call predecessors, (44), 13 states have return successors, (45), 43 states have call predecessors, (45), 42 states have call successors, (45) [2021-11-13 17:53:56,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 613 states to 613 states and 950 transitions. [2021-11-13 17:53:56,290 INFO L78 Accepts]: Start accepts. Automaton has 613 states and 950 transitions. Word has length 145 [2021-11-13 17:53:56,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:53:56,291 INFO L470 AbstractCegarLoop]: Abstraction has 613 states and 950 transitions. [2021-11-13 17:53:56,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 5 states have internal predecessors, (134), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 17:53:56,291 INFO L276 IsEmpty]: Start isEmpty. Operand 613 states and 950 transitions. [2021-11-13 17:53:56,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-13 17:53:56,294 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:53:56,294 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:53:56,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-13 17:53:56,294 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:53:56,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:53:56,295 INFO L85 PathProgramCache]: Analyzing trace with hash 744886792, now seen corresponding path program 1 times [2021-11-13 17:53:56,295 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:53:56,295 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90080558] [2021-11-13 17:53:56,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:53:56,296 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:53:56,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:56,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 17:53:56,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:56,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-13 17:53:56,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:56,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-13 17:53:56,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:56,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-11-13 17:53:56,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:56,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2021-11-13 17:53:56,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:56,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:53:56,466 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:53:56,466 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90080558] [2021-11-13 17:53:56,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90080558] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:53:56,466 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:53:56,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-13 17:53:56,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108772852] [2021-11-13 17:53:56,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:53:56,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 17:53:56,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:53:56,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 17:53:56,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-13 17:53:56,469 INFO L87 Difference]: Start difference. First operand 613 states and 950 transitions. Second operand has 8 states, 8 states have (on average 16.75) internal successors, (134), 6 states have internal predecessors, (134), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 17:53:59,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:53:59,016 INFO L93 Difference]: Finished difference Result 2288 states and 3616 transitions. [2021-11-13 17:53:59,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-13 17:53:59,017 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 16.75) internal successors, (134), 6 states have internal predecessors, (134), 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 145 [2021-11-13 17:53:59,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:53:59,029 INFO L225 Difference]: With dead ends: 2288 [2021-11-13 17:53:59,030 INFO L226 Difference]: Without dead ends: 1692 [2021-11-13 17:53:59,033 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-11-13 17:53:59,034 INFO L933 BasicCegarLoop]: 774 mSDtfsCounter, 1536 mSDsluCounter, 1856 mSDsCounter, 0 mSdLazyCounter, 2138 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1596.59ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1553 SdHoareTripleChecker+Valid, 2630 SdHoareTripleChecker+Invalid, 2246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 21.81ms SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 2138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1919.67ms IncrementalHoareTripleChecker+Time [2021-11-13 17:53:59,034 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1553 Valid, 2630 Invalid, 2246 Unknown, 0 Unchecked, 21.81ms Time], IncrementalHoareTripleChecker [108 Valid, 2138 Invalid, 0 Unknown, 0 Unchecked, 1919.67ms Time] [2021-11-13 17:53:59,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1692 states. [2021-11-13 17:53:59,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1692 to 1242. [2021-11-13 17:53:59,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1242 states, 1130 states have (on average 1.5610619469026548) internal successors, (1764), 1137 states have internal predecessors, (1764), 82 states have call successors, (82), 25 states have call predecessors, (82), 29 states have return successors, (95), 83 states have call predecessors, (95), 80 states have call successors, (95) [2021-11-13 17:53:59,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1242 states to 1242 states and 1941 transitions. [2021-11-13 17:53:59,191 INFO L78 Accepts]: Start accepts. Automaton has 1242 states and 1941 transitions. Word has length 145 [2021-11-13 17:53:59,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:53:59,191 INFO L470 AbstractCegarLoop]: Abstraction has 1242 states and 1941 transitions. [2021-11-13 17:53:59,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.75) internal successors, (134), 6 states have internal predecessors, (134), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 17:53:59,192 INFO L276 IsEmpty]: Start isEmpty. Operand 1242 states and 1941 transitions. [2021-11-13 17:53:59,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-13 17:53:59,195 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:53:59,195 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:53:59,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-13 17:53:59,196 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:53:59,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:53:59,196 INFO L85 PathProgramCache]: Analyzing trace with hash -1097588922, now seen corresponding path program 1 times [2021-11-13 17:53:59,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:53:59,197 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114617764] [2021-11-13 17:53:59,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:53:59,197 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:53:59,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:59,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 17:53:59,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:59,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-13 17:53:59,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:59,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-13 17:53:59,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:59,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-11-13 17:53:59,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:59,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2021-11-13 17:53:59,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:53:59,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:53:59,343 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:53:59,343 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114617764] [2021-11-13 17:53:59,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114617764] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:53:59,343 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:53:59,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 17:53:59,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886898586] [2021-11-13 17:53:59,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:53:59,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 17:53:59,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:53:59,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 17:53:59,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-13 17:53:59,345 INFO L87 Difference]: Start difference. First operand 1242 states and 1941 transitions. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 5 states have internal predecessors, (134), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 17:54:00,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:54:00,976 INFO L93 Difference]: Finished difference Result 2995 states and 4763 transitions. [2021-11-13 17:54:00,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 17:54:00,977 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 5 states have internal predecessors, (134), 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 145 [2021-11-13 17:54:00,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:54:00,990 INFO L225 Difference]: With dead ends: 2995 [2021-11-13 17:54:00,990 INFO L226 Difference]: Without dead ends: 1770 [2021-11-13 17:54:00,995 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-13 17:54:00,996 INFO L933 BasicCegarLoop]: 490 mSDtfsCounter, 863 mSDsluCounter, 774 mSDsCounter, 0 mSdLazyCounter, 1108 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1077.42ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 880 SdHoareTripleChecker+Valid, 1264 SdHoareTripleChecker+Invalid, 1183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.32ms SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1266.16ms IncrementalHoareTripleChecker+Time [2021-11-13 17:54:00,997 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [880 Valid, 1264 Invalid, 1183 Unknown, 0 Unchecked, 13.32ms Time], IncrementalHoareTripleChecker [75 Valid, 1108 Invalid, 0 Unknown, 0 Unchecked, 1266.16ms Time] [2021-11-13 17:54:01,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1770 states. [2021-11-13 17:54:01,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1770 to 1242. [2021-11-13 17:54:01,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1242 states, 1130 states have (on average 1.5575221238938053) internal successors, (1760), 1137 states have internal predecessors, (1760), 82 states have call successors, (82), 25 states have call predecessors, (82), 29 states have return successors, (95), 83 states have call predecessors, (95), 80 states have call successors, (95) [2021-11-13 17:54:01,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1242 states to 1242 states and 1937 transitions. [2021-11-13 17:54:01,153 INFO L78 Accepts]: Start accepts. Automaton has 1242 states and 1937 transitions. Word has length 145 [2021-11-13 17:54:01,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:54:01,154 INFO L470 AbstractCegarLoop]: Abstraction has 1242 states and 1937 transitions. [2021-11-13 17:54:01,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 5 states have internal predecessors, (134), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 17:54:01,154 INFO L276 IsEmpty]: Start isEmpty. Operand 1242 states and 1937 transitions. [2021-11-13 17:54:01,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-13 17:54:01,156 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:54:01,156 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:54:01,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-13 17:54:01,157 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:54:01,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:54:01,158 INFO L85 PathProgramCache]: Analyzing trace with hash 1475375688, now seen corresponding path program 1 times [2021-11-13 17:54:01,158 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:54:01,158 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835666630] [2021-11-13 17:54:01,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:54:01,159 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:54:01,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:01,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 17:54:01,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:01,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-13 17:54:01,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:01,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-13 17:54:01,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:01,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-11-13 17:54:01,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:01,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2021-11-13 17:54:01,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:01,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:54:01,306 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:54:01,306 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835666630] [2021-11-13 17:54:01,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835666630] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:54:01,307 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:54:01,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 17:54:01,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344508981] [2021-11-13 17:54:01,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:54:01,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 17:54:01,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:54:01,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 17:54:01,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-13 17:54:01,309 INFO L87 Difference]: Start difference. First operand 1242 states and 1937 transitions. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 5 states have internal predecessors, (134), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 17:54:02,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:54:02,583 INFO L93 Difference]: Finished difference Result 2986 states and 4733 transitions. [2021-11-13 17:54:02,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 17:54:02,584 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 5 states have internal predecessors, (134), 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 145 [2021-11-13 17:54:02,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:54:02,596 INFO L225 Difference]: With dead ends: 2986 [2021-11-13 17:54:02,597 INFO L226 Difference]: Without dead ends: 1761 [2021-11-13 17:54:02,601 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-13 17:54:02,603 INFO L933 BasicCegarLoop]: 486 mSDtfsCounter, 989 mSDsluCounter, 608 mSDsCounter, 0 mSdLazyCounter, 975 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 821.35ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1006 SdHoareTripleChecker+Valid, 1094 SdHoareTripleChecker+Invalid, 1077 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.73ms SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 975 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 959.23ms IncrementalHoareTripleChecker+Time [2021-11-13 17:54:02,603 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1006 Valid, 1094 Invalid, 1077 Unknown, 0 Unchecked, 9.73ms Time], IncrementalHoareTripleChecker [102 Valid, 975 Invalid, 0 Unknown, 0 Unchecked, 959.23ms Time] [2021-11-13 17:54:02,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1761 states. [2021-11-13 17:54:02,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1761 to 1242. [2021-11-13 17:54:02,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1242 states, 1130 states have (on average 1.5539823008849558) internal successors, (1756), 1137 states have internal predecessors, (1756), 82 states have call successors, (82), 25 states have call predecessors, (82), 29 states have return successors, (95), 83 states have call predecessors, (95), 80 states have call successors, (95) [2021-11-13 17:54:02,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1242 states to 1242 states and 1933 transitions. [2021-11-13 17:54:02,753 INFO L78 Accepts]: Start accepts. Automaton has 1242 states and 1933 transitions. Word has length 145 [2021-11-13 17:54:02,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:54:02,754 INFO L470 AbstractCegarLoop]: Abstraction has 1242 states and 1933 transitions. [2021-11-13 17:54:02,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 5 states have internal predecessors, (134), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 17:54:02,754 INFO L276 IsEmpty]: Start isEmpty. Operand 1242 states and 1933 transitions. [2021-11-13 17:54:02,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-13 17:54:02,757 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:54:02,757 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:54:02,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-13 17:54:02,758 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:54:02,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:54:02,758 INFO L85 PathProgramCache]: Analyzing trace with hash 1142732550, now seen corresponding path program 1 times [2021-11-13 17:54:02,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:54:02,759 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266631772] [2021-11-13 17:54:02,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:54:02,759 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:54:02,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:02,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 17:54:02,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:02,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-13 17:54:02,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:02,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-13 17:54:02,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:02,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-11-13 17:54:02,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:02,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2021-11-13 17:54:02,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:02,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:54:02,918 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:54:02,918 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266631772] [2021-11-13 17:54:02,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266631772] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:54:02,919 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:54:02,919 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 17:54:02,919 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216174325] [2021-11-13 17:54:02,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:54:02,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 17:54:02,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:54:02,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 17:54:02,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-13 17:54:02,921 INFO L87 Difference]: Start difference. First operand 1242 states and 1933 transitions. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 5 states have internal predecessors, (134), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 17:54:04,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:54:04,189 INFO L93 Difference]: Finished difference Result 2977 states and 4703 transitions. [2021-11-13 17:54:04,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 17:54:04,190 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 5 states have internal predecessors, (134), 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 145 [2021-11-13 17:54:04,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:54:04,202 INFO L225 Difference]: With dead ends: 2977 [2021-11-13 17:54:04,202 INFO L226 Difference]: Without dead ends: 1752 [2021-11-13 17:54:04,207 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-13 17:54:04,208 INFO L933 BasicCegarLoop]: 482 mSDtfsCounter, 987 mSDsluCounter, 608 mSDsCounter, 0 mSdLazyCounter, 965 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 769.47ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1004 SdHoareTripleChecker+Valid, 1090 SdHoareTripleChecker+Invalid, 1067 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.33ms SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 965 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 914.45ms IncrementalHoareTripleChecker+Time [2021-11-13 17:54:04,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1004 Valid, 1090 Invalid, 1067 Unknown, 0 Unchecked, 8.33ms Time], IncrementalHoareTripleChecker [102 Valid, 965 Invalid, 0 Unknown, 0 Unchecked, 914.45ms Time] [2021-11-13 17:54:04,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1752 states. [2021-11-13 17:54:04,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1752 to 1242. [2021-11-13 17:54:04,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1242 states, 1130 states have (on average 1.5504424778761061) internal successors, (1752), 1137 states have internal predecessors, (1752), 82 states have call successors, (82), 25 states have call predecessors, (82), 29 states have return successors, (95), 83 states have call predecessors, (95), 80 states have call successors, (95) [2021-11-13 17:54:04,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1242 states to 1242 states and 1929 transitions. [2021-11-13 17:54:04,346 INFO L78 Accepts]: Start accepts. Automaton has 1242 states and 1929 transitions. Word has length 145 [2021-11-13 17:54:04,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:54:04,347 INFO L470 AbstractCegarLoop]: Abstraction has 1242 states and 1929 transitions. [2021-11-13 17:54:04,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 5 states have internal predecessors, (134), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 17:54:04,347 INFO L276 IsEmpty]: Start isEmpty. Operand 1242 states and 1929 transitions. [2021-11-13 17:54:04,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-13 17:54:04,350 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:54:04,350 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:54:04,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-13 17:54:04,350 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:54:04,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:54:04,351 INFO L85 PathProgramCache]: Analyzing trace with hash -1223302520, now seen corresponding path program 1 times [2021-11-13 17:54:04,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:54:04,351 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295374995] [2021-11-13 17:54:04,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:54:04,352 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:54:04,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:04,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 17:54:04,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:04,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-13 17:54:04,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:04,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-13 17:54:04,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:04,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-11-13 17:54:04,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:04,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2021-11-13 17:54:04,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:04,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:54:04,529 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:54:04,529 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295374995] [2021-11-13 17:54:04,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295374995] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:54:04,530 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:54:04,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-13 17:54:04,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952948407] [2021-11-13 17:54:04,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:54:04,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 17:54:04,531 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:54:04,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 17:54:04,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-13 17:54:04,532 INFO L87 Difference]: Start difference. First operand 1242 states and 1929 transitions. Second operand has 8 states, 8 states have (on average 16.75) internal successors, (134), 6 states have internal predecessors, (134), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 17:54:07,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:54:07,130 INFO L93 Difference]: Finished difference Result 5087 states and 8017 transitions. [2021-11-13 17:54:07,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-13 17:54:07,143 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 16.75) internal successors, (134), 6 states have internal predecessors, (134), 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 145 [2021-11-13 17:54:07,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:54:07,168 INFO L225 Difference]: With dead ends: 5087 [2021-11-13 17:54:07,168 INFO L226 Difference]: Without dead ends: 3862 [2021-11-13 17:54:07,174 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2021-11-13 17:54:07,175 INFO L933 BasicCegarLoop]: 748 mSDtfsCounter, 1882 mSDsluCounter, 1844 mSDsCounter, 0 mSdLazyCounter, 2056 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1536.04ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1910 SdHoareTripleChecker+Valid, 2592 SdHoareTripleChecker+Invalid, 2174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 18.66ms SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 2056 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1832.42ms IncrementalHoareTripleChecker+Time [2021-11-13 17:54:07,175 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1910 Valid, 2592 Invalid, 2174 Unknown, 0 Unchecked, 18.66ms Time], IncrementalHoareTripleChecker [118 Valid, 2056 Invalid, 0 Unknown, 0 Unchecked, 1832.42ms Time] [2021-11-13 17:54:07,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3862 states. [2021-11-13 17:54:07,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3862 to 2530. [2021-11-13 17:54:07,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2530 states, 2308 states have (on average 1.5606585788561524) internal successors, (3602), 2329 states have internal predecessors, (3602), 154 states have call successors, (154), 49 states have call predecessors, (154), 67 states have return successors, (215), 159 states have call predecessors, (215), 152 states have call successors, (215) [2021-11-13 17:54:07,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2530 states to 2530 states and 3971 transitions. [2021-11-13 17:54:07,488 INFO L78 Accepts]: Start accepts. Automaton has 2530 states and 3971 transitions. Word has length 145 [2021-11-13 17:54:07,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:54:07,488 INFO L470 AbstractCegarLoop]: Abstraction has 2530 states and 3971 transitions. [2021-11-13 17:54:07,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.75) internal successors, (134), 6 states have internal predecessors, (134), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 17:54:07,489 INFO L276 IsEmpty]: Start isEmpty. Operand 2530 states and 3971 transitions. [2021-11-13 17:54:07,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-13 17:54:07,492 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:54:07,492 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:54:07,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-13 17:54:07,493 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:54:07,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:54:07,493 INFO L85 PathProgramCache]: Analyzing trace with hash 778583750, now seen corresponding path program 1 times [2021-11-13 17:54:07,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:54:07,494 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504952] [2021-11-13 17:54:07,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:54:07,494 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:54:07,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:07,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 17:54:07,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:07,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-13 17:54:07,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:07,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-13 17:54:07,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:07,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-11-13 17:54:07,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:07,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2021-11-13 17:54:07,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:07,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:54:07,654 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:54:07,655 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504952] [2021-11-13 17:54:07,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504952] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:54:07,655 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:54:07,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 17:54:07,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133101674] [2021-11-13 17:54:07,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:54:07,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 17:54:07,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:54:07,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 17:54:07,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-13 17:54:07,657 INFO L87 Difference]: Start difference. First operand 2530 states and 3971 transitions. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 5 states have internal predecessors, (134), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 17:54:09,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:54:09,252 INFO L93 Difference]: Finished difference Result 6072 states and 9647 transitions. [2021-11-13 17:54:09,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 17:54:09,253 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 5 states have internal predecessors, (134), 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 145 [2021-11-13 17:54:09,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:54:09,276 INFO L225 Difference]: With dead ends: 6072 [2021-11-13 17:54:09,276 INFO L226 Difference]: Without dead ends: 3559 [2021-11-13 17:54:09,284 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-13 17:54:09,285 INFO L933 BasicCegarLoop]: 458 mSDtfsCounter, 1009 mSDsluCounter, 606 mSDsCounter, 0 mSdLazyCounter, 928 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 984.66ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1026 SdHoareTripleChecker+Valid, 1064 SdHoareTripleChecker+Invalid, 1035 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.82ms SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 928 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1134.21ms IncrementalHoareTripleChecker+Time [2021-11-13 17:54:09,286 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1026 Valid, 1064 Invalid, 1035 Unknown, 0 Unchecked, 10.82ms Time], IncrementalHoareTripleChecker [107 Valid, 928 Invalid, 0 Unknown, 0 Unchecked, 1134.21ms Time] [2021-11-13 17:54:09,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3559 states. [2021-11-13 17:54:09,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3559 to 2530. [2021-11-13 17:54:09,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2530 states, 2308 states have (on average 1.5571923743500866) internal successors, (3594), 2329 states have internal predecessors, (3594), 154 states have call successors, (154), 49 states have call predecessors, (154), 67 states have return successors, (215), 159 states have call predecessors, (215), 152 states have call successors, (215) [2021-11-13 17:54:09,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2530 states to 2530 states and 3963 transitions. [2021-11-13 17:54:09,582 INFO L78 Accepts]: Start accepts. Automaton has 2530 states and 3963 transitions. Word has length 145 [2021-11-13 17:54:09,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:54:09,582 INFO L470 AbstractCegarLoop]: Abstraction has 2530 states and 3963 transitions. [2021-11-13 17:54:09,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 5 states have internal predecessors, (134), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 17:54:09,583 INFO L276 IsEmpty]: Start isEmpty. Operand 2530 states and 3963 transitions. [2021-11-13 17:54:09,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-13 17:54:09,586 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:54:09,587 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:54:09,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-13 17:54:09,587 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:54:09,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:54:09,588 INFO L85 PathProgramCache]: Analyzing trace with hash 1249940100, now seen corresponding path program 1 times [2021-11-13 17:54:09,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:54:09,588 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634891832] [2021-11-13 17:54:09,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:54:09,589 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:54:09,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:09,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 17:54:09,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:09,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-13 17:54:09,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:09,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-13 17:54:09,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:09,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-11-13 17:54:09,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:09,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2021-11-13 17:54:09,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:09,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:54:09,726 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:54:09,726 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634891832] [2021-11-13 17:54:09,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634891832] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:54:09,727 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:54:09,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 17:54:09,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485390820] [2021-11-13 17:54:09,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:54:09,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 17:54:09,728 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:54:09,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 17:54:09,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-13 17:54:09,729 INFO L87 Difference]: Start difference. First operand 2530 states and 3963 transitions. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 5 states have internal predecessors, (134), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 17:54:11,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:54:11,118 INFO L93 Difference]: Finished difference Result 6045 states and 9569 transitions. [2021-11-13 17:54:11,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 17:54:11,118 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 5 states have internal predecessors, (134), 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 145 [2021-11-13 17:54:11,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:54:11,141 INFO L225 Difference]: With dead ends: 6045 [2021-11-13 17:54:11,142 INFO L226 Difference]: Without dead ends: 3532 [2021-11-13 17:54:11,150 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-13 17:54:11,151 INFO L933 BasicCegarLoop]: 467 mSDtfsCounter, 855 mSDsluCounter, 772 mSDsCounter, 0 mSdLazyCounter, 1046 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 806.80ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 872 SdHoareTripleChecker+Valid, 1239 SdHoareTripleChecker+Invalid, 1126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.52ms SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1046 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 941.21ms IncrementalHoareTripleChecker+Time [2021-11-13 17:54:11,151 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [872 Valid, 1239 Invalid, 1126 Unknown, 0 Unchecked, 9.52ms Time], IncrementalHoareTripleChecker [80 Valid, 1046 Invalid, 0 Unknown, 0 Unchecked, 941.21ms Time] [2021-11-13 17:54:11,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3532 states. [2021-11-13 17:54:11,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3532 to 2530. [2021-11-13 17:54:11,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2530 states, 2308 states have (on average 1.5537261698440208) internal successors, (3586), 2329 states have internal predecessors, (3586), 154 states have call successors, (154), 49 states have call predecessors, (154), 67 states have return successors, (215), 159 states have call predecessors, (215), 152 states have call successors, (215) [2021-11-13 17:54:11,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2530 states to 2530 states and 3955 transitions. [2021-11-13 17:54:11,481 INFO L78 Accepts]: Start accepts. Automaton has 2530 states and 3955 transitions. Word has length 145 [2021-11-13 17:54:11,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:54:11,482 INFO L470 AbstractCegarLoop]: Abstraction has 2530 states and 3955 transitions. [2021-11-13 17:54:11,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 5 states have internal predecessors, (134), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 17:54:11,482 INFO L276 IsEmpty]: Start isEmpty. Operand 2530 states and 3955 transitions. [2021-11-13 17:54:11,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-13 17:54:11,487 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:54:11,487 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:54:11,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-13 17:54:11,488 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:54:11,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:54:11,489 INFO L85 PathProgramCache]: Analyzing trace with hash -397422842, now seen corresponding path program 1 times [2021-11-13 17:54:11,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:54:11,489 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048051877] [2021-11-13 17:54:11,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:54:11,490 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:54:11,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:11,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 17:54:11,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:11,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-13 17:54:11,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:11,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-13 17:54:11,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:11,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-11-13 17:54:11,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:11,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2021-11-13 17:54:11,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:11,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:54:11,637 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:54:11,637 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048051877] [2021-11-13 17:54:11,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048051877] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:54:11,640 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:54:11,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 17:54:11,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438780394] [2021-11-13 17:54:11,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:54:11,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 17:54:11,641 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:54:11,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 17:54:11,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-13 17:54:11,642 INFO L87 Difference]: Start difference. First operand 2530 states and 3955 transitions. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 5 states have internal predecessors, (134), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 17:54:13,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:54:13,097 INFO L93 Difference]: Finished difference Result 6018 states and 9491 transitions. [2021-11-13 17:54:13,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 17:54:13,098 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 5 states have internal predecessors, (134), 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 145 [2021-11-13 17:54:13,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:54:13,117 INFO L225 Difference]: With dead ends: 6018 [2021-11-13 17:54:13,117 INFO L226 Difference]: Without dead ends: 3505 [2021-11-13 17:54:13,126 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-13 17:54:13,127 INFO L933 BasicCegarLoop]: 463 mSDtfsCounter, 853 mSDsluCounter, 772 mSDsCounter, 0 mSdLazyCounter, 1034 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 872.23ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 870 SdHoareTripleChecker+Valid, 1235 SdHoareTripleChecker+Invalid, 1114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.69ms SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1034 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1014.99ms IncrementalHoareTripleChecker+Time [2021-11-13 17:54:13,127 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [870 Valid, 1235 Invalid, 1114 Unknown, 0 Unchecked, 9.69ms Time], IncrementalHoareTripleChecker [80 Valid, 1034 Invalid, 0 Unknown, 0 Unchecked, 1014.99ms Time] [2021-11-13 17:54:13,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3505 states. [2021-11-13 17:54:13,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3505 to 2530. [2021-11-13 17:54:13,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2530 states, 2308 states have (on average 1.550259965337955) internal successors, (3578), 2329 states have internal predecessors, (3578), 154 states have call successors, (154), 49 states have call predecessors, (154), 67 states have return successors, (215), 159 states have call predecessors, (215), 152 states have call successors, (215) [2021-11-13 17:54:13,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2530 states to 2530 states and 3947 transitions. [2021-11-13 17:54:13,446 INFO L78 Accepts]: Start accepts. Automaton has 2530 states and 3947 transitions. Word has length 145 [2021-11-13 17:54:13,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:54:13,447 INFO L470 AbstractCegarLoop]: Abstraction has 2530 states and 3947 transitions. [2021-11-13 17:54:13,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 5 states have internal predecessors, (134), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 17:54:13,448 INFO L276 IsEmpty]: Start isEmpty. Operand 2530 states and 3947 transitions. [2021-11-13 17:54:13,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-13 17:54:13,452 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:54:13,452 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:54:13,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-13 17:54:13,453 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:54:13,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:54:13,453 INFO L85 PathProgramCache]: Analyzing trace with hash 1766193732, now seen corresponding path program 1 times [2021-11-13 17:54:13,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:54:13,454 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114533919] [2021-11-13 17:54:13,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:54:13,454 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:54:13,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:13,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 17:54:13,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:13,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-13 17:54:13,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:13,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-13 17:54:13,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:13,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-11-13 17:54:13,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:13,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2021-11-13 17:54:13,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:13,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:54:13,615 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:54:13,615 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114533919] [2021-11-13 17:54:13,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114533919] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:54:13,615 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:54:13,616 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 17:54:13,616 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120090558] [2021-11-13 17:54:13,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:54:13,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 17:54:13,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:54:13,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 17:54:13,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-13 17:54:13,618 INFO L87 Difference]: Start difference. First operand 2530 states and 3947 transitions. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 5 states have internal predecessors, (134), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 17:54:15,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:54:15,061 INFO L93 Difference]: Finished difference Result 5991 states and 9413 transitions. [2021-11-13 17:54:15,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 17:54:15,062 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 5 states have internal predecessors, (134), 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 145 [2021-11-13 17:54:15,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:54:15,077 INFO L225 Difference]: With dead ends: 5991 [2021-11-13 17:54:15,078 INFO L226 Difference]: Without dead ends: 3478 [2021-11-13 17:54:15,086 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-13 17:54:15,087 INFO L933 BasicCegarLoop]: 459 mSDtfsCounter, 851 mSDsluCounter, 772 mSDsCounter, 0 mSdLazyCounter, 1022 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 860.26ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 868 SdHoareTripleChecker+Valid, 1231 SdHoareTripleChecker+Invalid, 1102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.60ms SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1022 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 995.64ms IncrementalHoareTripleChecker+Time [2021-11-13 17:54:15,088 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [868 Valid, 1231 Invalid, 1102 Unknown, 0 Unchecked, 9.60ms Time], IncrementalHoareTripleChecker [80 Valid, 1022 Invalid, 0 Unknown, 0 Unchecked, 995.64ms Time] [2021-11-13 17:54:15,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3478 states. [2021-11-13 17:54:15,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3478 to 2530. [2021-11-13 17:54:15,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2530 states, 2308 states have (on average 1.5467937608318891) internal successors, (3570), 2329 states have internal predecessors, (3570), 154 states have call successors, (154), 49 states have call predecessors, (154), 67 states have return successors, (215), 159 states have call predecessors, (215), 152 states have call successors, (215) [2021-11-13 17:54:15,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2530 states to 2530 states and 3939 transitions. [2021-11-13 17:54:15,376 INFO L78 Accepts]: Start accepts. Automaton has 2530 states and 3939 transitions. Word has length 145 [2021-11-13 17:54:15,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:54:15,377 INFO L470 AbstractCegarLoop]: Abstraction has 2530 states and 3939 transitions. [2021-11-13 17:54:15,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 5 states have internal predecessors, (134), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 17:54:15,377 INFO L276 IsEmpty]: Start isEmpty. Operand 2530 states and 3939 transitions. [2021-11-13 17:54:15,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-13 17:54:15,380 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:54:15,381 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:54:15,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-13 17:54:15,381 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:54:15,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:54:15,382 INFO L85 PathProgramCache]: Analyzing trace with hash 727609158, now seen corresponding path program 1 times [2021-11-13 17:54:15,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:54:15,382 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35208582] [2021-11-13 17:54:15,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:54:15,383 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:54:15,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:15,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 17:54:15,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:15,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-13 17:54:15,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:15,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-13 17:54:15,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:15,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-11-13 17:54:15,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:15,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2021-11-13 17:54:15,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:15,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:54:15,571 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:54:15,571 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35208582] [2021-11-13 17:54:15,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35208582] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:54:15,571 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:54:15,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-13 17:54:15,572 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658859873] [2021-11-13 17:54:15,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:54:15,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 17:54:15,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:54:15,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 17:54:15,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-13 17:54:15,574 INFO L87 Difference]: Start difference. First operand 2530 states and 3939 transitions. Second operand has 8 states, 8 states have (on average 16.75) internal successors, (134), 6 states have internal predecessors, (134), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 17:54:18,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:54:18,990 INFO L93 Difference]: Finished difference Result 9547 states and 15061 transitions. [2021-11-13 17:54:18,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-13 17:54:18,991 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 16.75) internal successors, (134), 6 states have internal predecessors, (134), 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 145 [2021-11-13 17:54:18,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:54:19,028 INFO L225 Difference]: With dead ends: 9547 [2021-11-13 17:54:19,029 INFO L226 Difference]: Without dead ends: 7034 [2021-11-13 17:54:19,038 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2021-11-13 17:54:19,039 INFO L933 BasicCegarLoop]: 744 mSDtfsCounter, 1243 mSDsluCounter, 2151 mSDsCounter, 0 mSdLazyCounter, 2346 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1954.70ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1259 SdHoareTripleChecker+Valid, 2895 SdHoareTripleChecker+Invalid, 2434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 23.78ms SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 2346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2301.40ms IncrementalHoareTripleChecker+Time [2021-11-13 17:54:19,039 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1259 Valid, 2895 Invalid, 2434 Unknown, 0 Unchecked, 23.78ms Time], IncrementalHoareTripleChecker [88 Valid, 2346 Invalid, 0 Unknown, 0 Unchecked, 2301.40ms Time] [2021-11-13 17:54:19,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7034 states. [2021-11-13 17:54:19,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7034 to 5094. [2021-11-13 17:54:19,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5094 states, 4638 states have (on average 1.5463561880120742) internal successors, (7172), 4705 states have internal predecessors, (7172), 294 states have call successors, (294), 97 states have call predecessors, (294), 161 states have return successors, (547), 307 states have call predecessors, (547), 292 states have call successors, (547) [2021-11-13 17:54:19,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5094 states to 5094 states and 8013 transitions. [2021-11-13 17:54:19,628 INFO L78 Accepts]: Start accepts. Automaton has 5094 states and 8013 transitions. Word has length 145 [2021-11-13 17:54:19,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:54:19,628 INFO L470 AbstractCegarLoop]: Abstraction has 5094 states and 8013 transitions. [2021-11-13 17:54:19,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.75) internal successors, (134), 6 states have internal predecessors, (134), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 17:54:19,629 INFO L276 IsEmpty]: Start isEmpty. Operand 5094 states and 8013 transitions. [2021-11-13 17:54:19,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-13 17:54:19,634 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:54:19,634 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:54:19,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-13 17:54:19,635 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:54:19,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:54:19,636 INFO L85 PathProgramCache]: Analyzing trace with hash -1245556220, now seen corresponding path program 1 times [2021-11-13 17:54:19,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:54:19,636 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106622061] [2021-11-13 17:54:19,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:54:19,636 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:54:19,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:19,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 17:54:19,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:19,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-13 17:54:19,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:19,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-13 17:54:19,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:19,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-11-13 17:54:19,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:19,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2021-11-13 17:54:19,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:19,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:54:19,769 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:54:19,769 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106622061] [2021-11-13 17:54:19,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106622061] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:54:19,770 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:54:19,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 17:54:19,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819119440] [2021-11-13 17:54:19,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:54:19,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 17:54:19,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:54:19,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 17:54:19,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-13 17:54:19,772 INFO L87 Difference]: Start difference. First operand 5094 states and 8013 transitions. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 5 states have internal predecessors, (134), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 17:54:21,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:54:21,426 INFO L93 Difference]: Finished difference Result 12013 states and 18995 transitions. [2021-11-13 17:54:21,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 17:54:21,427 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 5 states have internal predecessors, (134), 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 145 [2021-11-13 17:54:21,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:54:21,493 INFO L225 Difference]: With dead ends: 12013 [2021-11-13 17:54:21,493 INFO L226 Difference]: Without dead ends: 6936 [2021-11-13 17:54:21,507 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-13 17:54:21,508 INFO L933 BasicCegarLoop]: 453 mSDtfsCounter, 980 mSDsluCounter, 608 mSDsCounter, 0 mSdLazyCounter, 896 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 710.41ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 997 SdHoareTripleChecker+Valid, 1061 SdHoareTripleChecker+Invalid, 999 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.75ms SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 896 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 837.39ms IncrementalHoareTripleChecker+Time [2021-11-13 17:54:21,508 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [997 Valid, 1061 Invalid, 999 Unknown, 0 Unchecked, 7.75ms Time], IncrementalHoareTripleChecker [103 Valid, 896 Invalid, 0 Unknown, 0 Unchecked, 837.39ms Time] [2021-11-13 17:54:21,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6936 states. [2021-11-13 17:54:22,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6936 to 5094. [2021-11-13 17:54:22,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5094 states, 4638 states have (on average 1.5429064251832687) internal successors, (7156), 4705 states have internal predecessors, (7156), 294 states have call successors, (294), 97 states have call predecessors, (294), 161 states have return successors, (547), 307 states have call predecessors, (547), 292 states have call successors, (547) [2021-11-13 17:54:22,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5094 states to 5094 states and 7997 transitions. [2021-11-13 17:54:22,104 INFO L78 Accepts]: Start accepts. Automaton has 5094 states and 7997 transitions. Word has length 145 [2021-11-13 17:54:22,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:54:22,105 INFO L470 AbstractCegarLoop]: Abstraction has 5094 states and 7997 transitions. [2021-11-13 17:54:22,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 5 states have internal predecessors, (134), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 17:54:22,105 INFO L276 IsEmpty]: Start isEmpty. Operand 5094 states and 7997 transitions. [2021-11-13 17:54:22,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-13 17:54:22,111 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:54:22,111 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:54:22,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-13 17:54:22,111 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:54:22,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:54:22,112 INFO L85 PathProgramCache]: Analyzing trace with hash 907550598, now seen corresponding path program 1 times [2021-11-13 17:54:22,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:54:22,113 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126592510] [2021-11-13 17:54:22,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:54:22,113 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:54:22,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:22,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 17:54:22,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:22,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-13 17:54:22,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:22,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-13 17:54:22,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:22,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-11-13 17:54:22,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:22,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2021-11-13 17:54:22,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:22,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:54:22,251 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:54:22,251 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126592510] [2021-11-13 17:54:22,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126592510] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:54:22,252 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:54:22,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-13 17:54:22,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124561051] [2021-11-13 17:54:22,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:54:22,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 17:54:22,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:54:22,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 17:54:22,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-13 17:54:22,254 INFO L87 Difference]: Start difference. First operand 5094 states and 7997 transitions. Second operand has 6 states, 6 states have (on average 22.333333333333332) internal successors, (134), 4 states have internal predecessors, (134), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 17:54:26,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:54:26,078 INFO L93 Difference]: Finished difference Result 18457 states and 29051 transitions. [2021-11-13 17:54:26,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-13 17:54:26,079 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 22.333333333333332) internal successors, (134), 4 states have internal predecessors, (134), 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 145 [2021-11-13 17:54:26,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:54:26,127 INFO L225 Difference]: With dead ends: 18457 [2021-11-13 17:54:26,128 INFO L226 Difference]: Without dead ends: 13381 [2021-11-13 17:54:26,153 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-11-13 17:54:26,155 INFO L933 BasicCegarLoop]: 941 mSDtfsCounter, 1482 mSDsluCounter, 1021 mSDsCounter, 0 mSdLazyCounter, 1762 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1707.85ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1520 SdHoareTripleChecker+Valid, 1962 SdHoareTripleChecker+Invalid, 1873 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 40.85ms SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 1762 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1974.99ms IncrementalHoareTripleChecker+Time [2021-11-13 17:54:26,156 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1520 Valid, 1962 Invalid, 1873 Unknown, 0 Unchecked, 40.85ms Time], IncrementalHoareTripleChecker [111 Valid, 1762 Invalid, 0 Unknown, 0 Unchecked, 1974.99ms Time] [2021-11-13 17:54:26,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13381 states. [2021-11-13 17:54:27,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13381 to 10005. [2021-11-13 17:54:27,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10005 states, 9100 states have (on average 1.533076923076923) internal successors, (13951), 9248 states have internal predecessors, (13951), 582 states have call successors, (582), 193 states have call predecessors, (582), 322 states have return successors, (1075), 579 states have call predecessors, (1075), 580 states have call successors, (1075) [2021-11-13 17:54:27,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10005 states to 10005 states and 15608 transitions. [2021-11-13 17:54:27,276 INFO L78 Accepts]: Start accepts. Automaton has 10005 states and 15608 transitions. Word has length 145 [2021-11-13 17:54:27,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:54:27,276 INFO L470 AbstractCegarLoop]: Abstraction has 10005 states and 15608 transitions. [2021-11-13 17:54:27,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.333333333333332) internal successors, (134), 4 states have internal predecessors, (134), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 17:54:27,277 INFO L276 IsEmpty]: Start isEmpty. Operand 10005 states and 15608 transitions. [2021-11-13 17:54:27,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2021-11-13 17:54:27,301 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:54:27,302 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:54:27,302 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-13 17:54:27,302 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:54:27,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:54:27,303 INFO L85 PathProgramCache]: Analyzing trace with hash 2038695837, now seen corresponding path program 1 times [2021-11-13 17:54:27,303 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:54:27,303 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404926600] [2021-11-13 17:54:27,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:54:27,304 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:54:27,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:27,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 17:54:27,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:27,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-13 17:54:27,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:27,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-13 17:54:27,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:27,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-11-13 17:54:27,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:27,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2021-11-13 17:54:27,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:27,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2021-11-13 17:54:27,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:27,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:54:27,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:27,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 221 [2021-11-13 17:54:27,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:27,526 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-13 17:54:27,526 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:54:27,527 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404926600] [2021-11-13 17:54:27,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404926600] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:54:27,527 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858069272] [2021-11-13 17:54:27,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:54:27,528 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:54:27,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18ef9aca-e6ae-4d65-80a0-8d5200a28cd8/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:54:27,530 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18ef9aca-e6ae-4d65-80a0-8d5200a28cd8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:54:27,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18ef9aca-e6ae-4d65-80a0-8d5200a28cd8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-13 17:54:27,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:27,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 976 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 17:54:27,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:54:28,339 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-13 17:54:28,339 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 17:54:28,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858069272] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:54:28,340 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 17:54:28,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-11-13 17:54:28,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44734775] [2021-11-13 17:54:28,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:54:28,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 17:54:28,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:54:28,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 17:54:28,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-13 17:54:28,344 INFO L87 Difference]: Start difference. First operand 10005 states and 15608 transitions. Second operand has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 2 states have internal predecessors, (193), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-13 17:54:30,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:54:30,772 INFO L93 Difference]: Finished difference Result 29866 states and 46956 transitions. [2021-11-13 17:54:30,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 17:54:30,773 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 2 states have internal predecessors, (193), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 236 [2021-11-13 17:54:30,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:54:30,859 INFO L225 Difference]: With dead ends: 29866 [2021-11-13 17:54:30,860 INFO L226 Difference]: Without dead ends: 19879 [2021-11-13 17:54:30,889 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-13 17:54:30,890 INFO L933 BasicCegarLoop]: 481 mSDtfsCounter, 372 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.22ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 372 SdHoareTripleChecker+Valid, 909 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.51ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.08ms IncrementalHoareTripleChecker+Time [2021-11-13 17:54:30,891 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [372 Valid, 909 Invalid, 12 Unknown, 0 Unchecked, 2.51ms Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 10.08ms Time] [2021-11-13 17:54:30,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19879 states. [2021-11-13 17:54:32,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19879 to 19811. [2021-11-13 17:54:32,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19811 states, 18024 states have (on average 1.53245672436751) internal successors, (27621), 18318 states have internal predecessors, (27621), 1142 states have call successors, (1142), 385 states have call predecessors, (1142), 644 states have return successors, (2115), 1123 states have call predecessors, (2115), 1140 states have call successors, (2115) [2021-11-13 17:54:33,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19811 states to 19811 states and 30878 transitions. [2021-11-13 17:54:33,009 INFO L78 Accepts]: Start accepts. Automaton has 19811 states and 30878 transitions. Word has length 236 [2021-11-13 17:54:33,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:54:33,010 INFO L470 AbstractCegarLoop]: Abstraction has 19811 states and 30878 transitions. [2021-11-13 17:54:33,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 2 states have internal predecessors, (193), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-13 17:54:33,010 INFO L276 IsEmpty]: Start isEmpty. Operand 19811 states and 30878 transitions. [2021-11-13 17:54:33,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2021-11-13 17:54:33,053 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:54:33,053 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:54:33,092 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18ef9aca-e6ae-4d65-80a0-8d5200a28cd8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-13 17:54:33,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18ef9aca-e6ae-4d65-80a0-8d5200a28cd8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-13 17:54:33,280 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:54:33,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:54:33,281 INFO L85 PathProgramCache]: Analyzing trace with hash 1470094013, now seen corresponding path program 1 times [2021-11-13 17:54:33,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:54:33,281 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836096595] [2021-11-13 17:54:33,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:54:33,281 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:54:33,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:33,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 17:54:33,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:33,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-13 17:54:33,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:33,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-13 17:54:33,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:33,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-11-13 17:54:33,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:33,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2021-11-13 17:54:33,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:33,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2021-11-13 17:54:33,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:33,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:54:33,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:33,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 221 [2021-11-13 17:54:33,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:33,520 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-13 17:54:33,521 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:54:33,521 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836096595] [2021-11-13 17:54:33,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836096595] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:54:33,521 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530345408] [2021-11-13 17:54:33,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:54:33,522 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:54:33,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18ef9aca-e6ae-4d65-80a0-8d5200a28cd8/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:54:33,523 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18ef9aca-e6ae-4d65-80a0-8d5200a28cd8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:54:33,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18ef9aca-e6ae-4d65-80a0-8d5200a28cd8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-13 17:54:33,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:33,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 970 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 17:54:33,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:54:34,360 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-13 17:54:34,360 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 17:54:34,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530345408] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:54:34,361 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 17:54:34,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-11-13 17:54:34,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512984269] [2021-11-13 17:54:34,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:54:34,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 17:54:34,363 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:54:34,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 17:54:34,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-13 17:54:34,364 INFO L87 Difference]: Start difference. First operand 19811 states and 30878 transitions. Second operand has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 2 states have internal predecessors, (205), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-13 17:54:37,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:54:37,859 INFO L93 Difference]: Finished difference Result 59076 states and 92798 transitions. [2021-11-13 17:54:37,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 17:54:37,861 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 2 states have internal predecessors, (205), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 236 [2021-11-13 17:54:37,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:54:38,026 INFO L225 Difference]: With dead ends: 59076 [2021-11-13 17:54:38,026 INFO L226 Difference]: Without dead ends: 39283 [2021-11-13 17:54:38,077 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-13 17:54:38,079 INFO L933 BasicCegarLoop]: 481 mSDtfsCounter, 360 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.04ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 360 SdHoareTripleChecker+Valid, 909 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.32ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.70ms IncrementalHoareTripleChecker+Time [2021-11-13 17:54:38,079 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [360 Valid, 909 Invalid, 12 Unknown, 0 Unchecked, 2.32ms Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 10.70ms Time] [2021-11-13 17:54:38,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39283 states. [2021-11-13 17:54:41,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39283 to 39151. [2021-11-13 17:54:41,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39151 states, 35648 states have (on average 1.5327928635547576) internal successors, (54641), 36234 states have internal predecessors, (54641), 2214 states have call successors, (2214), 769 states have call predecessors, (2214), 1288 states have return successors, (4147), 2163 states have call predecessors, (4147), 2212 states have call successors, (4147) [2021-11-13 17:54:41,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39151 states to 39151 states and 61002 transitions. [2021-11-13 17:54:41,935 INFO L78 Accepts]: Start accepts. Automaton has 39151 states and 61002 transitions. Word has length 236 [2021-11-13 17:54:41,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:54:41,936 INFO L470 AbstractCegarLoop]: Abstraction has 39151 states and 61002 transitions. [2021-11-13 17:54:41,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 2 states have internal predecessors, (205), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-13 17:54:41,936 INFO L276 IsEmpty]: Start isEmpty. Operand 39151 states and 61002 transitions. [2021-11-13 17:54:42,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2021-11-13 17:54:42,021 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:54:42,021 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:54:42,063 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18ef9aca-e6ae-4d65-80a0-8d5200a28cd8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-13 17:54:42,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18ef9aca-e6ae-4d65-80a0-8d5200a28cd8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:54:42,249 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:54:42,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:54:42,249 INFO L85 PathProgramCache]: Analyzing trace with hash -75014691, now seen corresponding path program 1 times [2021-11-13 17:54:42,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:54:42,250 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821715016] [2021-11-13 17:54:42,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:54:42,250 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:54:42,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:42,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 17:54:42,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:42,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-13 17:54:42,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:42,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-13 17:54:42,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:42,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-11-13 17:54:42,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:42,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2021-11-13 17:54:42,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:42,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2021-11-13 17:54:42,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:42,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:54:42,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:42,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 221 [2021-11-13 17:54:42,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:42,468 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-13 17:54:42,469 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:54:42,469 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821715016] [2021-11-13 17:54:42,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821715016] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:54:42,469 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457238419] [2021-11-13 17:54:42,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:54:42,470 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:54:42,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18ef9aca-e6ae-4d65-80a0-8d5200a28cd8/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:54:42,471 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18ef9aca-e6ae-4d65-80a0-8d5200a28cd8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:54:42,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18ef9aca-e6ae-4d65-80a0-8d5200a28cd8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-13 17:54:42,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:42,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 964 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 17:54:42,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:54:43,299 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-13 17:54:43,300 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 17:54:43,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457238419] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:54:43,300 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 17:54:43,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-11-13 17:54:43,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702386659] [2021-11-13 17:54:43,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:54:43,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 17:54:43,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:54:43,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 17:54:43,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-13 17:54:43,303 INFO L87 Difference]: Start difference. First operand 39151 states and 61002 transitions. Second operand has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 2 states have internal predecessors, (181), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-13 17:54:49,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:54:49,851 INFO L93 Difference]: Finished difference Result 116776 states and 183346 transitions. [2021-11-13 17:54:49,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 17:54:49,860 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 2 states have internal predecessors, (181), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 236 [2021-11-13 17:54:49,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:54:50,212 INFO L225 Difference]: With dead ends: 116776 [2021-11-13 17:54:50,213 INFO L226 Difference]: Without dead ends: 77643 [2021-11-13 17:54:50,320 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-13 17:54:50,322 INFO L933 BasicCegarLoop]: 481 mSDtfsCounter, 384 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.82ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 384 SdHoareTripleChecker+Valid, 909 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.36ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.39ms IncrementalHoareTripleChecker+Time [2021-11-13 17:54:50,323 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [384 Valid, 909 Invalid, 12 Unknown, 0 Unchecked, 2.36ms Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 10.39ms Time] [2021-11-13 17:54:50,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77643 states. [2021-11-13 17:54:57,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77643 to 77383. [2021-11-13 17:54:57,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77383 states, 70512 states have (on average 1.533143294758339) internal successors, (108105), 71682 states have internal predecessors, (108105), 4294 states have call successors, (4294), 1537 states have call predecessors, (4294), 2576 states have return successors, (8147), 4179 states have call predecessors, (8147), 4292 states have call successors, (8147) [2021-11-13 17:54:58,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77383 states to 77383 states and 120546 transitions. [2021-11-13 17:54:58,216 INFO L78 Accepts]: Start accepts. Automaton has 77383 states and 120546 transitions. Word has length 236 [2021-11-13 17:54:58,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:54:58,217 INFO L470 AbstractCegarLoop]: Abstraction has 77383 states and 120546 transitions. [2021-11-13 17:54:58,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 2 states have internal predecessors, (181), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-13 17:54:58,218 INFO L276 IsEmpty]: Start isEmpty. Operand 77383 states and 120546 transitions. [2021-11-13 17:54:58,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2021-11-13 17:54:58,313 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:54:58,313 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:54:58,339 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18ef9aca-e6ae-4d65-80a0-8d5200a28cd8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-11-13 17:54:58,513 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18ef9aca-e6ae-4d65-80a0-8d5200a28cd8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-13 17:54:58,514 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:54:58,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:54:58,515 INFO L85 PathProgramCache]: Analyzing trace with hash 1474265341, now seen corresponding path program 1 times [2021-11-13 17:54:58,515 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:54:58,515 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750185232] [2021-11-13 17:54:58,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:54:58,515 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:54:58,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:58,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 17:54:58,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:58,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-13 17:54:58,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:58,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-13 17:54:58,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:58,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-11-13 17:54:58,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:58,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2021-11-13 17:54:58,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:58,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2021-11-13 17:54:58,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:58,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:54:58,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:58,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 221 [2021-11-13 17:54:58,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:58,723 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-13 17:54:58,724 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:54:58,724 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750185232] [2021-11-13 17:54:58,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750185232] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:54:58,725 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020776326] [2021-11-13 17:54:58,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:54:58,726 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:54:58,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18ef9aca-e6ae-4d65-80a0-8d5200a28cd8/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:54:58,727 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18ef9aca-e6ae-4d65-80a0-8d5200a28cd8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:54:58,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18ef9aca-e6ae-4d65-80a0-8d5200a28cd8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-13 17:54:58,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:58,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 958 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 17:54:58,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:54:59,449 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-13 17:54:59,450 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 17:54:59,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020776326] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:54:59,450 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 17:54:59,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-11-13 17:54:59,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537132883] [2021-11-13 17:54:59,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:54:59,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 17:54:59,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:54:59,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 17:54:59,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-13 17:54:59,452 INFO L87 Difference]: Start difference. First operand 77383 states and 120546 transitions. Second operand has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 2 states have internal predecessors, (163), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7)