./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.13.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbc9933-fe6e-41ae-ae4e-c3cef16b6efa/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbc9933-fe6e-41ae-ae4e-c3cef16b6efa/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbc9933-fe6e-41ae-ae4e-c3cef16b6efa/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbc9933-fe6e-41ae-ae4e-c3cef16b6efa/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.13.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbc9933-fe6e-41ae-ae4e-c3cef16b6efa/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbc9933-fe6e-41ae-ae4e-c3cef16b6efa/bin/uautomizer-DrprNOufMa --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ce176716d91d866602a372020396224af9fcf4c5f81c6adcdcc0f1d83b0d658f --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 21:06:54,460 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 21:06:54,462 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 21:06:54,491 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 21:06:54,492 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 21:06:54,493 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 21:06:54,495 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 21:06:54,497 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 21:06:54,499 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 21:06:54,500 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 21:06:54,502 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 21:06:54,503 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 21:06:54,503 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 21:06:54,504 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 21:06:54,506 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 21:06:54,507 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 21:06:54,508 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 21:06:54,509 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 21:06:54,511 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 21:06:54,514 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 21:06:54,515 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 21:06:54,517 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 21:06:54,518 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 21:06:54,519 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 21:06:54,522 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 21:06:54,523 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 21:06:54,523 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 21:06:54,524 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 21:06:54,525 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 21:06:54,526 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 21:06:54,526 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 21:06:54,527 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 21:06:54,528 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 21:06:54,529 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 21:06:54,530 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 21:06:54,530 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 21:06:54,531 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 21:06:54,531 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 21:06:54,531 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 21:06:54,532 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 21:06:54,532 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 21:06:54,533 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbc9933-fe6e-41ae-ae4e-c3cef16b6efa/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 21:06:54,556 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 21:06:54,556 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 21:06:54,557 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 21:06:54,557 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 21:06:54,557 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 21:06:54,558 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 21:06:54,558 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 21:06:54,558 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 21:06:54,558 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 21:06:54,559 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 21:06:54,559 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 21:06:54,559 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 21:06:54,559 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 21:06:54,559 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 21:06:54,559 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 21:06:54,560 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 21:06:54,560 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 21:06:54,560 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 21:06:54,560 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 21:06:54,560 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 21:06:54,560 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 21:06:54,560 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 21:06:54,561 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 21:06:54,561 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 21:06:54,561 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 21:06:54,561 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 21:06:54,561 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 21:06:54,561 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 21:06:54,561 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 21:06:54,561 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 21:06:54,562 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 21:06:54,562 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 21:06:54,562 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 21:06:54,562 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 21:06:54,562 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_6bbc9933-fe6e-41ae-ae4e-c3cef16b6efa/bin/uautomizer-DrprNOufMa/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbc9933-fe6e-41ae-ae4e-c3cef16b6efa/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ce176716d91d866602a372020396224af9fcf4c5f81c6adcdcc0f1d83b0d658f [2021-12-06 21:06:54,739 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 21:06:54,754 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 21:06:54,757 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 21:06:54,758 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 21:06:54,758 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 21:06:54,760 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbc9933-fe6e-41ae-ae4e-c3cef16b6efa/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.13.cil-1.c [2021-12-06 21:06:54,806 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbc9933-fe6e-41ae-ae4e-c3cef16b6efa/bin/uautomizer-DrprNOufMa/data/6076ce377/0db47807203a4030a06919b0b18fa13d/FLAG3f6d82c90 [2021-12-06 21:06:55,234 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 21:06:55,235 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbc9933-fe6e-41ae-ae4e-c3cef16b6efa/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.13.cil-1.c [2021-12-06 21:06:55,250 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbc9933-fe6e-41ae-ae4e-c3cef16b6efa/bin/uautomizer-DrprNOufMa/data/6076ce377/0db47807203a4030a06919b0b18fa13d/FLAG3f6d82c90 [2021-12-06 21:06:55,263 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbc9933-fe6e-41ae-ae4e-c3cef16b6efa/bin/uautomizer-DrprNOufMa/data/6076ce377/0db47807203a4030a06919b0b18fa13d [2021-12-06 21:06:55,265 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 21:06:55,266 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 21:06:55,268 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 21:06:55,268 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 21:06:55,271 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 21:06:55,272 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 09:06:55" (1/1) ... [2021-12-06 21:06:55,272 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51f12861 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:06:55, skipping insertion in model container [2021-12-06 21:06:55,272 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 09:06:55" (1/1) ... [2021-12-06 21:06:55,277 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 21:06:55,318 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 21:06:55,443 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbc9933-fe6e-41ae-ae4e-c3cef16b6efa/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.13.cil-1.c[914,927] [2021-12-06 21:06:55,480 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbc9933-fe6e-41ae-ae4e-c3cef16b6efa/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.13.cil-1.c[7115,7128] [2021-12-06 21:06:55,552 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 21:06:55,559 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 21:06:55,568 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbc9933-fe6e-41ae-ae4e-c3cef16b6efa/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.13.cil-1.c[914,927] [2021-12-06 21:06:55,580 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbc9933-fe6e-41ae-ae4e-c3cef16b6efa/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.13.cil-1.c[7115,7128] [2021-12-06 21:06:55,621 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 21:06:55,639 INFO L208 MainTranslator]: Completed translation [2021-12-06 21:06:55,639 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:06:55 WrapperNode [2021-12-06 21:06:55,639 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 21:06:55,640 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 21:06:55,640 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 21:06:55,640 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 21:06:55,645 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:06:55" (1/1) ... [2021-12-06 21:06:55,657 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:06:55" (1/1) ... [2021-12-06 21:06:55,695 INFO L137 Inliner]: procedures = 79, calls = 97, calls flagged for inlining = 47, calls inlined = 47, statements flattened = 1103 [2021-12-06 21:06:55,696 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 21:06:55,696 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 21:06:55,696 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 21:06:55,696 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 21:06:55,703 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:06:55" (1/1) ... [2021-12-06 21:06:55,703 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:06:55" (1/1) ... [2021-12-06 21:06:55,707 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:06:55" (1/1) ... [2021-12-06 21:06:55,707 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:06:55" (1/1) ... [2021-12-06 21:06:55,721 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:06:55" (1/1) ... [2021-12-06 21:06:55,734 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:06:55" (1/1) ... [2021-12-06 21:06:55,737 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:06:55" (1/1) ... [2021-12-06 21:06:55,743 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 21:06:55,743 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 21:06:55,744 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 21:06:55,744 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 21:06:55,744 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:06:55" (1/1) ... [2021-12-06 21:06:55,751 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 21:06:55,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbc9933-fe6e-41ae-ae4e-c3cef16b6efa/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:06:55,772 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbc9933-fe6e-41ae-ae4e-c3cef16b6efa/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 21:06:55,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbc9933-fe6e-41ae-ae4e-c3cef16b6efa/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 21:06:55,800 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 21:06:55,800 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-06 21:06:55,800 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-06 21:06:55,800 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2021-12-06 21:06:55,800 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2021-12-06 21:06:55,800 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2021-12-06 21:06:55,801 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2021-12-06 21:06:55,801 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2021-12-06 21:06:55,801 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2021-12-06 21:06:55,801 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2021-12-06 21:06:55,801 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2021-12-06 21:06:55,801 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2021-12-06 21:06:55,801 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2021-12-06 21:06:55,801 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2021-12-06 21:06:55,801 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2021-12-06 21:06:55,801 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2021-12-06 21:06:55,802 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2021-12-06 21:06:55,802 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2021-12-06 21:06:55,802 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2021-12-06 21:06:55,802 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2021-12-06 21:06:55,802 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2021-12-06 21:06:55,802 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2021-12-06 21:06:55,802 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2021-12-06 21:06:55,802 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 21:06:55,802 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2021-12-06 21:06:55,802 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2021-12-06 21:06:55,802 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2021-12-06 21:06:55,803 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2021-12-06 21:06:55,803 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 21:06:55,803 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 21:06:55,803 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2021-12-06 21:06:55,803 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2021-12-06 21:06:55,803 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2021-12-06 21:06:55,803 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2021-12-06 21:06:55,909 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 21:06:55,910 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 21:06:56,449 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 21:06:56,458 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 21:06:56,458 INFO L301 CfgBuilder]: Removed 20 assume(true) statements. [2021-12-06 21:06:56,461 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 09:06:56 BoogieIcfgContainer [2021-12-06 21:06:56,461 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 21:06:56,462 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 21:06:56,462 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 21:06:56,464 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 21:06:56,465 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 09:06:55" (1/3) ... [2021-12-06 21:06:56,465 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e9b2855 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 09:06:56, skipping insertion in model container [2021-12-06 21:06:56,465 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:06:55" (2/3) ... [2021-12-06 21:06:56,465 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e9b2855 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 09:06:56, skipping insertion in model container [2021-12-06 21:06:56,466 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 09:06:56" (3/3) ... [2021-12-06 21:06:56,467 INFO L111 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-1+token_ring.13.cil-1.c [2021-12-06 21:06:56,470 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 21:06:56,470 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-06 21:06:56,507 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 21:06:56,511 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-06 21:06:56,512 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-06 21:06:56,547 INFO L276 IsEmpty]: Start isEmpty. Operand has 516 states, 455 states have (on average 1.6483516483516483) internal successors, (750), 463 states have internal predecessors, (750), 43 states have call successors, (43), 15 states have call predecessors, (43), 15 states have return successors, (43), 41 states have call predecessors, (43), 43 states have call successors, (43) [2021-12-06 21:06:56,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-06 21:06:56,556 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:06:56,556 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:06:56,557 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:06:56,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:06:56,561 INFO L85 PathProgramCache]: Analyzing trace with hash 1743097905, now seen corresponding path program 1 times [2021-12-06 21:06:56,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:06:56,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868643983] [2021-12-06 21:06:56,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:06:56,569 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:06:56,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:06:56,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 21:06:56,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:06:56,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 21:06:56,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:06:56,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-06 21:06:56,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:06:56,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 21:06:56,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:06:56,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 21:06:56,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:06:56,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 21:06:56,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:06:56,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-06 21:06:56,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:06:56,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:06:56,872 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:06:56,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868643983] [2021-12-06 21:06:56,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868643983] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:06:56,873 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:06:56,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-06 21:06:56,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18377858] [2021-12-06 21:06:56,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:06:56,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 21:06:56,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:06:56,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 21:06:56,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-06 21:06:56,908 INFO L87 Difference]: Start difference. First operand has 516 states, 455 states have (on average 1.6483516483516483) internal successors, (750), 463 states have internal predecessors, (750), 43 states have call successors, (43), 15 states have call predecessors, (43), 15 states have return successors, (43), 41 states have call predecessors, (43), 43 states have call successors, (43) Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-06 21:06:57,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:06:57,744 INFO L93 Difference]: Finished difference Result 1137 states and 1828 transitions. [2021-12-06 21:06:57,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 21:06:57,746 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 65 [2021-12-06 21:06:57,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:06:57,762 INFO L225 Difference]: With dead ends: 1137 [2021-12-06 21:06:57,762 INFO L226 Difference]: Without dead ends: 640 [2021-12-06 21:06:57,768 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-12-06 21:06:57,771 INFO L933 BasicCegarLoop]: 793 mSDtfsCounter, 1258 mSDsluCounter, 1539 mSDsCounter, 0 mSdLazyCounter, 1026 mSolverCounterSat, 208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1263 SdHoareTripleChecker+Valid, 2332 SdHoareTripleChecker+Invalid, 1234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 208 IncrementalHoareTripleChecker+Valid, 1026 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 21:06:57,772 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1263 Valid, 2332 Invalid, 1234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [208 Valid, 1026 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-06 21:06:57,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2021-12-06 21:06:57,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 601. [2021-12-06 21:06:57,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 601 states, 523 states have (on average 1.5353728489483747) internal successors, (803), 530 states have internal predecessors, (803), 54 states have call successors, (54), 22 states have call predecessors, (54), 22 states have return successors, (55), 51 states have call predecessors, (55), 50 states have call successors, (55) [2021-12-06 21:06:57,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 912 transitions. [2021-12-06 21:06:57,848 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 912 transitions. Word has length 65 [2021-12-06 21:06:57,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:06:57,849 INFO L470 AbstractCegarLoop]: Abstraction has 601 states and 912 transitions. [2021-12-06 21:06:57,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-06 21:06:57,849 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 912 transitions. [2021-12-06 21:06:57,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-06 21:06:57,852 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:06:57,853 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:06:57,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 21:06:57,853 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:06:57,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:06:57,854 INFO L85 PathProgramCache]: Analyzing trace with hash 2146883856, now seen corresponding path program 1 times [2021-12-06 21:06:57,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:06:57,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760187188] [2021-12-06 21:06:57,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:06:57,854 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:06:57,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:06:57,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 21:06:57,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:06:57,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 21:06:57,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:06:57,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-06 21:06:57,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:06:57,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 21:06:57,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:06:57,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 21:06:57,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:06:57,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 21:06:57,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:06:57,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-06 21:06:57,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:06:57,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:06:57,996 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:06:57,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760187188] [2021-12-06 21:06:57,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760187188] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:06:57,996 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:06:57,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-06 21:06:57,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11148914] [2021-12-06 21:06:57,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:06:57,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 21:06:57,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:06:57,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 21:06:57,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-06 21:06:57,999 INFO L87 Difference]: Start difference. First operand 601 states and 912 transitions. Second operand has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-06 21:06:58,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:06:58,776 INFO L93 Difference]: Finished difference Result 815 states and 1206 transitions. [2021-12-06 21:06:58,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-06 21:06:58,776 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 65 [2021-12-06 21:06:58,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:06:58,782 INFO L225 Difference]: With dead ends: 815 [2021-12-06 21:06:58,782 INFO L226 Difference]: Without dead ends: 638 [2021-12-06 21:06:58,783 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-06 21:06:58,784 INFO L933 BasicCegarLoop]: 767 mSDtfsCounter, 692 mSDsluCounter, 2831 mSDsCounter, 0 mSdLazyCounter, 1594 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 693 SdHoareTripleChecker+Valid, 3598 SdHoareTripleChecker+Invalid, 1697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 1594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 21:06:58,784 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [693 Valid, 3598 Invalid, 1697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 1594 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-06 21:06:58,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2021-12-06 21:06:58,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 606. [2021-12-06 21:06:58,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 606 states, 527 states have (on average 1.5294117647058822) internal successors, (806), 534 states have internal predecessors, (806), 54 states have call successors, (54), 22 states have call predecessors, (54), 23 states have return successors, (56), 52 states have call predecessors, (56), 50 states have call successors, (56) [2021-12-06 21:06:58,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 916 transitions. [2021-12-06 21:06:58,828 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 916 transitions. Word has length 65 [2021-12-06 21:06:58,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:06:58,829 INFO L470 AbstractCegarLoop]: Abstraction has 606 states and 916 transitions. [2021-12-06 21:06:58,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-06 21:06:58,829 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 916 transitions. [2021-12-06 21:06:58,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-06 21:06:58,832 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:06:58,833 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:06:58,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 21:06:58,833 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:06:58,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:06:58,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1117524558, now seen corresponding path program 1 times [2021-12-06 21:06:58,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:06:58,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709361139] [2021-12-06 21:06:58,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:06:58,834 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:06:58,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:06:58,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 21:06:58,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:06:58,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 21:06:58,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:06:58,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-06 21:06:58,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:06:58,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 21:06:58,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:06:58,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 21:06:58,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:06:58,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 21:06:58,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:06:58,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-06 21:06:58,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:06:58,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:06:58,949 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:06:58,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709361139] [2021-12-06 21:06:58,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709361139] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:06:58,949 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:06:58,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-06 21:06:58,949 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000600174] [2021-12-06 21:06:58,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:06:58,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 21:06:58,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:06:58,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 21:06:58,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-06 21:06:58,950 INFO L87 Difference]: Start difference. First operand 606 states and 916 transitions. Second operand has 10 states, 10 states have (on average 5.0) internal successors, (50), 7 states have internal predecessors, (50), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-06 21:07:00,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:07:00,021 INFO L93 Difference]: Finished difference Result 1506 states and 2135 transitions. [2021-12-06 21:07:00,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-06 21:07:00,022 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 7 states have internal predecessors, (50), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 65 [2021-12-06 21:07:00,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:07:00,028 INFO L225 Difference]: With dead ends: 1506 [2021-12-06 21:07:00,028 INFO L226 Difference]: Without dead ends: 1312 [2021-12-06 21:07:00,029 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=257, Invalid=1075, Unknown=0, NotChecked=0, Total=1332 [2021-12-06 21:07:00,030 INFO L933 BasicCegarLoop]: 878 mSDtfsCounter, 3815 mSDsluCounter, 2339 mSDsCounter, 0 mSdLazyCounter, 1685 mSolverCounterSat, 627 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3831 SdHoareTripleChecker+Valid, 3217 SdHoareTripleChecker+Invalid, 2312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 627 IncrementalHoareTripleChecker+Valid, 1685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-06 21:07:00,031 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3831 Valid, 3217 Invalid, 2312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [627 Valid, 1685 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-06 21:07:00,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1312 states. [2021-12-06 21:07:00,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1312 to 1187. [2021-12-06 21:07:00,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1187 states, 989 states have (on average 1.435793731041456) internal successors, (1420), 1004 states have internal predecessors, (1420), 111 states have call successors, (111), 75 states have call predecessors, (111), 85 states have return successors, (125), 109 states have call predecessors, (125), 107 states have call successors, (125) [2021-12-06 21:07:00,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1187 states to 1187 states and 1656 transitions. [2021-12-06 21:07:00,086 INFO L78 Accepts]: Start accepts. Automaton has 1187 states and 1656 transitions. Word has length 65 [2021-12-06 21:07:00,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:07:00,086 INFO L470 AbstractCegarLoop]: Abstraction has 1187 states and 1656 transitions. [2021-12-06 21:07:00,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 7 states have internal predecessors, (50), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-06 21:07:00,087 INFO L276 IsEmpty]: Start isEmpty. Operand 1187 states and 1656 transitions. [2021-12-06 21:07:00,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-06 21:07:00,088 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:07:00,088 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:07:00,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-06 21:07:00,089 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:07:00,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:07:00,089 INFO L85 PathProgramCache]: Analyzing trace with hash -2125993649, now seen corresponding path program 1 times [2021-12-06 21:07:00,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:07:00,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979680482] [2021-12-06 21:07:00,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:07:00,090 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:07:00,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:00,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 21:07:00,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:00,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 21:07:00,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:00,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-06 21:07:00,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:00,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 21:07:00,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:00,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 21:07:00,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:00,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 21:07:00,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:00,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-06 21:07:00,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:00,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:07:00,179 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:07:00,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979680482] [2021-12-06 21:07:00,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979680482] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:07:00,180 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:07:00,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-06 21:07:00,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843335667] [2021-12-06 21:07:00,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:07:00,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 21:07:00,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:07:00,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 21:07:00,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-06 21:07:00,181 INFO L87 Difference]: Start difference. First operand 1187 states and 1656 transitions. Second operand has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-06 21:07:01,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:07:01,034 INFO L93 Difference]: Finished difference Result 2068 states and 2799 transitions. [2021-12-06 21:07:01,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-06 21:07:01,035 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 65 [2021-12-06 21:07:01,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:07:01,044 INFO L225 Difference]: With dead ends: 2068 [2021-12-06 21:07:01,044 INFO L226 Difference]: Without dead ends: 1299 [2021-12-06 21:07:01,046 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-12-06 21:07:01,048 INFO L933 BasicCegarLoop]: 764 mSDtfsCounter, 1032 mSDsluCounter, 2464 mSDsCounter, 0 mSdLazyCounter, 1534 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1034 SdHoareTripleChecker+Valid, 3228 SdHoareTripleChecker+Invalid, 1688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 1534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 21:07:01,048 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1034 Valid, 3228 Invalid, 1688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 1534 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-06 21:07:01,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1299 states. [2021-12-06 21:07:01,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1299 to 1207. [2021-12-06 21:07:01,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1207 states, 1005 states have (on average 1.4238805970149253) internal successors, (1431), 1020 states have internal predecessors, (1431), 111 states have call successors, (111), 75 states have call predecessors, (111), 89 states have return successors, (129), 113 states have call predecessors, (129), 107 states have call successors, (129) [2021-12-06 21:07:01,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1207 states to 1207 states and 1671 transitions. [2021-12-06 21:07:01,112 INFO L78 Accepts]: Start accepts. Automaton has 1207 states and 1671 transitions. Word has length 65 [2021-12-06 21:07:01,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:07:01,113 INFO L470 AbstractCegarLoop]: Abstraction has 1207 states and 1671 transitions. [2021-12-06 21:07:01,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-06 21:07:01,113 INFO L276 IsEmpty]: Start isEmpty. Operand 1207 states and 1671 transitions. [2021-12-06 21:07:01,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-06 21:07:01,114 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:07:01,114 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:07:01,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-06 21:07:01,114 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:07:01,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:07:01,114 INFO L85 PathProgramCache]: Analyzing trace with hash -739790255, now seen corresponding path program 1 times [2021-12-06 21:07:01,115 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:07:01,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713215175] [2021-12-06 21:07:01,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:07:01,115 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:07:01,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:01,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 21:07:01,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:01,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 21:07:01,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:01,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-06 21:07:01,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:01,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 21:07:01,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:01,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 21:07:01,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:01,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 21:07:01,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:01,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-06 21:07:01,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:01,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:07:01,197 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:07:01,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713215175] [2021-12-06 21:07:01,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713215175] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:07:01,197 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:07:01,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-06 21:07:01,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472100793] [2021-12-06 21:07:01,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:07:01,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 21:07:01,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:07:01,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 21:07:01,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-06 21:07:01,199 INFO L87 Difference]: Start difference. First operand 1207 states and 1671 transitions. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-06 21:07:01,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:07:01,932 INFO L93 Difference]: Finished difference Result 2775 states and 3618 transitions. [2021-12-06 21:07:01,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-06 21:07:01,933 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 65 [2021-12-06 21:07:01,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:07:01,945 INFO L225 Difference]: With dead ends: 2775 [2021-12-06 21:07:01,945 INFO L226 Difference]: Without dead ends: 1987 [2021-12-06 21:07:01,948 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2021-12-06 21:07:01,949 INFO L933 BasicCegarLoop]: 775 mSDtfsCounter, 1899 mSDsluCounter, 1525 mSDsCounter, 0 mSdLazyCounter, 1230 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1929 SdHoareTripleChecker+Valid, 2300 SdHoareTripleChecker+Invalid, 1444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 1230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 21:07:01,950 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1929 Valid, 2300 Invalid, 1444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 1230 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-06 21:07:01,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1987 states. [2021-12-06 21:07:02,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1987 to 1655. [2021-12-06 21:07:02,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1655 states, 1358 states have (on average 1.3843888070692194) internal successors, (1880), 1382 states have internal predecessors, (1880), 157 states have call successors, (157), 114 states have call predecessors, (157), 138 states have return successors, (201), 161 states have call predecessors, (201), 153 states have call successors, (201) [2021-12-06 21:07:02,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1655 states to 1655 states and 2238 transitions. [2021-12-06 21:07:02,024 INFO L78 Accepts]: Start accepts. Automaton has 1655 states and 2238 transitions. Word has length 65 [2021-12-06 21:07:02,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:07:02,024 INFO L470 AbstractCegarLoop]: Abstraction has 1655 states and 2238 transitions. [2021-12-06 21:07:02,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-06 21:07:02,024 INFO L276 IsEmpty]: Start isEmpty. Operand 1655 states and 2238 transitions. [2021-12-06 21:07:02,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-06 21:07:02,025 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:07:02,025 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:07:02,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-06 21:07:02,026 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:07:02,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:07:02,026 INFO L85 PathProgramCache]: Analyzing trace with hash -873803761, now seen corresponding path program 1 times [2021-12-06 21:07:02,026 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:07:02,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653020731] [2021-12-06 21:07:02,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:07:02,026 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:07:02,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:02,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 21:07:02,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:02,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 21:07:02,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:02,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-06 21:07:02,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:02,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 21:07:02,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:02,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 21:07:02,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:02,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 21:07:02,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:02,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-06 21:07:02,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:02,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:07:02,101 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:07:02,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653020731] [2021-12-06 21:07:02,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653020731] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:07:02,101 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:07:02,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 21:07:02,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867045655] [2021-12-06 21:07:02,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:07:02,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 21:07:02,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:07:02,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 21:07:02,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-06 21:07:02,103 INFO L87 Difference]: Start difference. First operand 1655 states and 2238 transitions. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-06 21:07:02,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:07:02,455 INFO L93 Difference]: Finished difference Result 4133 states and 5392 transitions. [2021-12-06 21:07:02,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-06 21:07:02,455 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 65 [2021-12-06 21:07:02,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:07:02,467 INFO L225 Difference]: With dead ends: 4133 [2021-12-06 21:07:02,467 INFO L226 Difference]: Without dead ends: 2899 [2021-12-06 21:07:02,470 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-12-06 21:07:02,471 INFO L933 BasicCegarLoop]: 740 mSDtfsCounter, 1872 mSDsluCounter, 1120 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 221 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1906 SdHoareTripleChecker+Valid, 1860 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 221 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 21:07:02,471 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1906 Valid, 1860 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [221 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 21:07:02,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2899 states. [2021-12-06 21:07:02,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2899 to 2791. [2021-12-06 21:07:02,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2791 states, 2229 states have (on average 1.316733961417676) internal successors, (2935), 2275 states have internal predecessors, (2935), 286 states have call successors, (286), 220 states have call predecessors, (286), 274 states have return successors, (415), 300 states have call predecessors, (415), 282 states have call successors, (415) [2021-12-06 21:07:02,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2791 states to 2791 states and 3636 transitions. [2021-12-06 21:07:02,581 INFO L78 Accepts]: Start accepts. Automaton has 2791 states and 3636 transitions. Word has length 65 [2021-12-06 21:07:02,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:07:02,581 INFO L470 AbstractCegarLoop]: Abstraction has 2791 states and 3636 transitions. [2021-12-06 21:07:02,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-06 21:07:02,581 INFO L276 IsEmpty]: Start isEmpty. Operand 2791 states and 3636 transitions. [2021-12-06 21:07:02,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-06 21:07:02,582 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:07:02,583 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:07:02,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-06 21:07:02,583 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:07:02,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:07:02,583 INFO L85 PathProgramCache]: Analyzing trace with hash -635681848, now seen corresponding path program 1 times [2021-12-06 21:07:02,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:07:02,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375338338] [2021-12-06 21:07:02,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:07:02,584 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:07:02,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:02,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 21:07:02,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:02,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 21:07:02,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:02,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-06 21:07:02,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:02,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 21:07:02,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:02,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 21:07:02,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:02,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 21:07:02,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:02,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-06 21:07:02,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:02,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:07:02,637 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:07:02,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375338338] [2021-12-06 21:07:02,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375338338] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:07:02,637 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:07:02,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 21:07:02,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046771838] [2021-12-06 21:07:02,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:07:02,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 21:07:02,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:07:02,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 21:07:02,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-06 21:07:02,639 INFO L87 Difference]: Start difference. First operand 2791 states and 3636 transitions. Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-06 21:07:03,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:07:03,161 INFO L93 Difference]: Finished difference Result 6243 states and 7968 transitions. [2021-12-06 21:07:03,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 21:07:03,161 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 66 [2021-12-06 21:07:03,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:07:03,177 INFO L225 Difference]: With dead ends: 6243 [2021-12-06 21:07:03,177 INFO L226 Difference]: Without dead ends: 3880 [2021-12-06 21:07:03,181 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-12-06 21:07:03,182 INFO L933 BasicCegarLoop]: 772 mSDtfsCounter, 868 mSDsluCounter, 1468 mSDsCounter, 0 mSdLazyCounter, 576 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 877 SdHoareTripleChecker+Valid, 2240 SdHoareTripleChecker+Invalid, 717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 21:07:03,182 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [877 Valid, 2240 Invalid, 717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 576 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 21:07:03,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3880 states. [2021-12-06 21:07:03,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3880 to 3624. [2021-12-06 21:07:03,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3624 states, 2874 states have (on average 1.2964509394572026) internal successors, (3726), 2927 states have internal predecessors, (3726), 378 states have call successors, (378), 300 states have call predecessors, (378), 370 states have return successors, (533), 401 states have call predecessors, (533), 374 states have call successors, (533) [2021-12-06 21:07:03,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3624 states to 3624 states and 4637 transitions. [2021-12-06 21:07:03,326 INFO L78 Accepts]: Start accepts. Automaton has 3624 states and 4637 transitions. Word has length 66 [2021-12-06 21:07:03,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:07:03,326 INFO L470 AbstractCegarLoop]: Abstraction has 3624 states and 4637 transitions. [2021-12-06 21:07:03,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-06 21:07:03,326 INFO L276 IsEmpty]: Start isEmpty. Operand 3624 states and 4637 transitions. [2021-12-06 21:07:03,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-06 21:07:03,328 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:07:03,328 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] [2021-12-06 21:07:03,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-06 21:07:03,328 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:07:03,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:07:03,328 INFO L85 PathProgramCache]: Analyzing trace with hash -2082238937, now seen corresponding path program 1 times [2021-12-06 21:07:03,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:07:03,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892837474] [2021-12-06 21:07:03,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:07:03,329 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:07:03,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:03,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 21:07:03,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:03,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 21:07:03,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:03,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-06 21:07:03,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:03,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 21:07:03,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:03,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 21:07:03,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:03,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 21:07:03,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:03,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-06 21:07:03,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:03,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:07:03,381 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:07:03,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892837474] [2021-12-06 21:07:03,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892837474] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:07:03,381 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:07:03,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 21:07:03,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791471438] [2021-12-06 21:07:03,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:07:03,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 21:07:03,382 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:07:03,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 21:07:03,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-06 21:07:03,383 INFO L87 Difference]: Start difference. First operand 3624 states and 4637 transitions. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 3 states have internal predecessors, (57), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-06 21:07:03,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:07:03,721 INFO L93 Difference]: Finished difference Result 7635 states and 9611 transitions. [2021-12-06 21:07:03,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 21:07:03,722 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 3 states have internal predecessors, (57), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 72 [2021-12-06 21:07:03,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:07:03,739 INFO L225 Difference]: With dead ends: 7635 [2021-12-06 21:07:03,739 INFO L226 Difference]: Without dead ends: 4435 [2021-12-06 21:07:03,745 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-12-06 21:07:03,745 INFO L933 BasicCegarLoop]: 787 mSDtfsCounter, 1467 mSDsluCounter, 1145 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1502 SdHoareTripleChecker+Valid, 1932 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 21:07:03,746 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1502 Valid, 1932 Invalid, 429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 21:07:03,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4435 states. [2021-12-06 21:07:03,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4435 to 4187. [2021-12-06 21:07:03,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4187 states, 3321 states have (on average 1.2866606443842217) internal successors, (4273), 3380 states have internal predecessors, (4273), 434 states have call successors, (434), 350 states have call predecessors, (434), 430 states have return successors, (610), 461 states have call predecessors, (610), 430 states have call successors, (610) [2021-12-06 21:07:03,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4187 states to 4187 states and 5317 transitions. [2021-12-06 21:07:03,890 INFO L78 Accepts]: Start accepts. Automaton has 4187 states and 5317 transitions. Word has length 72 [2021-12-06 21:07:03,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:07:03,891 INFO L470 AbstractCegarLoop]: Abstraction has 4187 states and 5317 transitions. [2021-12-06 21:07:03,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 3 states have internal predecessors, (57), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-06 21:07:03,891 INFO L276 IsEmpty]: Start isEmpty. Operand 4187 states and 5317 transitions. [2021-12-06 21:07:03,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-06 21:07:03,893 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:07:03,893 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:07:03,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-06 21:07:03,893 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:07:03,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:07:03,893 INFO L85 PathProgramCache]: Analyzing trace with hash -641928531, now seen corresponding path program 1 times [2021-12-06 21:07:03,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:07:03,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980535226] [2021-12-06 21:07:03,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:07:03,894 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:07:03,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:03,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 21:07:03,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:03,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 21:07:03,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:03,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-06 21:07:03,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:03,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 21:07:03,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:03,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 21:07:03,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:03,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 21:07:03,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:03,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-06 21:07:03,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:03,960 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:07:03,960 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:07:03,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980535226] [2021-12-06 21:07:03,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980535226] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:07:03,960 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:07:03,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 21:07:03,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9111563] [2021-12-06 21:07:03,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:07:03,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 21:07:03,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:07:03,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 21:07:03,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-06 21:07:03,962 INFO L87 Difference]: Start difference. First operand 4187 states and 5317 transitions. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-06 21:07:04,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:07:04,417 INFO L93 Difference]: Finished difference Result 5256 states and 6601 transitions. [2021-12-06 21:07:04,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-06 21:07:04,418 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 73 [2021-12-06 21:07:04,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:07:04,435 INFO L225 Difference]: With dead ends: 5256 [2021-12-06 21:07:04,435 INFO L226 Difference]: Without dead ends: 5253 [2021-12-06 21:07:04,437 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-12-06 21:07:04,437 INFO L933 BasicCegarLoop]: 782 mSDtfsCounter, 2206 mSDsluCounter, 1118 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 312 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2216 SdHoareTripleChecker+Valid, 1900 SdHoareTripleChecker+Invalid, 631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 312 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 21:07:04,437 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2216 Valid, 1900 Invalid, 631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [312 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 21:07:04,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5253 states. [2021-12-06 21:07:04,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5253 to 4944. [2021-12-06 21:07:04,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4944 states, 3899 states have (on average 1.2744293408566298) internal successors, (4969), 3965 states have internal predecessors, (4969), 517 states have call successors, (517), 422 states have call predecessors, (517), 526 states have return successors, (738), 561 states have call predecessors, (738), 514 states have call successors, (738) [2021-12-06 21:07:04,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4944 states to 4944 states and 6224 transitions. [2021-12-06 21:07:04,610 INFO L78 Accepts]: Start accepts. Automaton has 4944 states and 6224 transitions. Word has length 73 [2021-12-06 21:07:04,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:07:04,610 INFO L470 AbstractCegarLoop]: Abstraction has 4944 states and 6224 transitions. [2021-12-06 21:07:04,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-06 21:07:04,611 INFO L276 IsEmpty]: Start isEmpty. Operand 4944 states and 6224 transitions. [2021-12-06 21:07:04,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-06 21:07:04,613 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:07:04,613 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:07:04,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-06 21:07:04,613 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:07:04,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:07:04,614 INFO L85 PathProgramCache]: Analyzing trace with hash 1573517105, now seen corresponding path program 1 times [2021-12-06 21:07:04,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:07:04,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420664970] [2021-12-06 21:07:04,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:07:04,614 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:07:04,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:04,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 21:07:04,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:04,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 21:07:04,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:04,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-06 21:07:04,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:04,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 21:07:04,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:04,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 21:07:04,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:04,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 21:07:04,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:04,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-06 21:07:04,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:04,709 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:07:04,709 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:07:04,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420664970] [2021-12-06 21:07:04,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420664970] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:07:04,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221024632] [2021-12-06 21:07:04,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:07:04,710 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:07:04,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbc9933-fe6e-41ae-ae4e-c3cef16b6efa/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:07:04,711 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbc9933-fe6e-41ae-ae4e-c3cef16b6efa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:07:04,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbc9933-fe6e-41ae-ae4e-c3cef16b6efa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 21:07:04,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:04,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-06 21:07:04,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:07:05,016 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:07:05,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:07:05,166 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:07:05,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221024632] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:07:05,167 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 21:07:05,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 4] total 10 [2021-12-06 21:07:05,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696022492] [2021-12-06 21:07:05,167 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 21:07:05,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 21:07:05,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:07:05,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 21:07:05,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-06 21:07:05,169 INFO L87 Difference]: Start difference. First operand 4944 states and 6224 transitions. Second operand has 10 states, 10 states have (on average 12.0) internal successors, (120), 7 states have internal predecessors, (120), 4 states have call successors, (20), 6 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-12-06 21:07:06,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:07:06,405 INFO L93 Difference]: Finished difference Result 9458 states and 11709 transitions. [2021-12-06 21:07:06,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-06 21:07:06,406 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 12.0) internal successors, (120), 7 states have internal predecessors, (120), 4 states have call successors, (20), 6 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 74 [2021-12-06 21:07:06,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:07:06,441 INFO L225 Difference]: With dead ends: 9458 [2021-12-06 21:07:06,441 INFO L226 Difference]: Without dead ends: 9455 [2021-12-06 21:07:06,444 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 174 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=170, Invalid=642, Unknown=0, NotChecked=0, Total=812 [2021-12-06 21:07:06,444 INFO L933 BasicCegarLoop]: 934 mSDtfsCounter, 3011 mSDsluCounter, 2093 mSDsCounter, 0 mSdLazyCounter, 2029 mSolverCounterSat, 381 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3078 SdHoareTripleChecker+Valid, 3027 SdHoareTripleChecker+Invalid, 2410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 381 IncrementalHoareTripleChecker+Valid, 2029 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-06 21:07:06,444 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3078 Valid, 3027 Invalid, 2410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [381 Valid, 2029 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-06 21:07:06,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9455 states. [2021-12-06 21:07:06,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9455 to 8569. [2021-12-06 21:07:06,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8569 states, 6734 states have (on average 1.2567567567567568) internal successors, (8463), 6851 states have internal predecessors, (8463), 895 states have call successors, (895), 754 states have call predecessors, (895), 938 states have return successors, (1295), 968 states have call predecessors, (1295), 892 states have call successors, (1295) [2021-12-06 21:07:06,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8569 states to 8569 states and 10653 transitions. [2021-12-06 21:07:06,762 INFO L78 Accepts]: Start accepts. Automaton has 8569 states and 10653 transitions. Word has length 74 [2021-12-06 21:07:06,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:07:06,763 INFO L470 AbstractCegarLoop]: Abstraction has 8569 states and 10653 transitions. [2021-12-06 21:07:06,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.0) internal successors, (120), 7 states have internal predecessors, (120), 4 states have call successors, (20), 6 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-12-06 21:07:06,763 INFO L276 IsEmpty]: Start isEmpty. Operand 8569 states and 10653 transitions. [2021-12-06 21:07:06,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-06 21:07:06,765 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:07:06,765 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:07:06,799 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbc9933-fe6e-41ae-ae4e-c3cef16b6efa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 21:07:06,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbc9933-fe6e-41ae-ae4e-c3cef16b6efa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-06 21:07:06,966 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:07:06,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:07:06,967 INFO L85 PathProgramCache]: Analyzing trace with hash -347460051, now seen corresponding path program 2 times [2021-12-06 21:07:06,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:07:06,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038239765] [2021-12-06 21:07:06,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:07:06,968 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:07:06,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:07,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 21:07:07,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:07,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 21:07:07,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:07,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-06 21:07:07,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:07,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 21:07:07,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:07,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 21:07:07,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:07,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 21:07:07,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:07,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-06 21:07:07,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:07,124 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:07:07,124 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:07:07,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038239765] [2021-12-06 21:07:07,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038239765] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:07:07,125 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:07:07,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 21:07:07,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231453146] [2021-12-06 21:07:07,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:07:07,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 21:07:07,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:07:07,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 21:07:07,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-06 21:07:07,126 INFO L87 Difference]: Start difference. First operand 8569 states and 10653 transitions. Second operand has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-06 21:07:07,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:07:07,560 INFO L93 Difference]: Finished difference Result 11599 states and 14400 transitions. [2021-12-06 21:07:07,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 21:07:07,561 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 77 [2021-12-06 21:07:07,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:07:07,578 INFO L225 Difference]: With dead ends: 11599 [2021-12-06 21:07:07,578 INFO L226 Difference]: Without dead ends: 4801 [2021-12-06 21:07:07,588 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-12-06 21:07:07,588 INFO L933 BasicCegarLoop]: 817 mSDtfsCounter, 1738 mSDsluCounter, 807 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1775 SdHoareTripleChecker+Valid, 1624 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 21:07:07,589 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1775 Valid, 1624 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 21:07:07,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4801 states. [2021-12-06 21:07:07,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4801 to 3732. [2021-12-06 21:07:07,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3732 states, 2965 states have (on average 1.267116357504216) internal successors, (3757), 3004 states have internal predecessors, (3757), 394 states have call successors, (394), 318 states have call predecessors, (394), 371 states have return successors, (519), 414 states have call predecessors, (519), 391 states have call successors, (519) [2021-12-06 21:07:07,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3732 states to 3732 states and 4670 transitions. [2021-12-06 21:07:07,739 INFO L78 Accepts]: Start accepts. Automaton has 3732 states and 4670 transitions. Word has length 77 [2021-12-06 21:07:07,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:07:07,739 INFO L470 AbstractCegarLoop]: Abstraction has 3732 states and 4670 transitions. [2021-12-06 21:07:07,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-06 21:07:07,740 INFO L276 IsEmpty]: Start isEmpty. Operand 3732 states and 4670 transitions. [2021-12-06 21:07:07,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-12-06 21:07:07,742 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:07:07,742 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:07:07,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-06 21:07:07,742 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:07:07,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:07:07,743 INFO L85 PathProgramCache]: Analyzing trace with hash 2092587107, now seen corresponding path program 1 times [2021-12-06 21:07:07,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:07:07,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131134939] [2021-12-06 21:07:07,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:07:07,743 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:07:07,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:07,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 21:07:07,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:07,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 21:07:07,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:07,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-06 21:07:07,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:07,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 21:07:07,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:07,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 21:07:07,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:07,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 21:07:07,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:07,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-06 21:07:07,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:07,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-06 21:07:07,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:07,813 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-06 21:07:07,813 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:07:07,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131134939] [2021-12-06 21:07:07,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131134939] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:07:07,814 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:07:07,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-06 21:07:07,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693087274] [2021-12-06 21:07:07,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:07:07,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 21:07:07,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:07:07,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 21:07:07,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-06 21:07:07,815 INFO L87 Difference]: Start difference. First operand 3732 states and 4670 transitions. Second operand has 8 states, 8 states have (on average 7.875) internal successors, (63), 5 states have internal predecessors, (63), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-06 21:07:08,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:07:08,815 INFO L93 Difference]: Finished difference Result 10340 states and 12693 transitions. [2021-12-06 21:07:08,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-06 21:07:08,815 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 5 states have internal predecessors, (63), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 84 [2021-12-06 21:07:08,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:07:08,829 INFO L225 Difference]: With dead ends: 10340 [2021-12-06 21:07:08,829 INFO L226 Difference]: Without dead ends: 5964 [2021-12-06 21:07:08,835 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2021-12-06 21:07:08,835 INFO L933 BasicCegarLoop]: 818 mSDtfsCounter, 1149 mSDsluCounter, 1917 mSDsCounter, 0 mSdLazyCounter, 1179 mSolverCounterSat, 229 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1161 SdHoareTripleChecker+Valid, 2735 SdHoareTripleChecker+Invalid, 1408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 229 IncrementalHoareTripleChecker+Valid, 1179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 21:07:08,835 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1161 Valid, 2735 Invalid, 1408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [229 Valid, 1179 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-06 21:07:08,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5964 states. [2021-12-06 21:07:09,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5964 to 5700. [2021-12-06 21:07:09,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5700 states, 4460 states have (on average 1.229596412556054) internal successors, (5484), 4542 states have internal predecessors, (5484), 610 states have call successors, (610), 504 states have call predecessors, (610), 628 states have return successors, (903), 658 states have call predecessors, (903), 607 states have call successors, (903) [2021-12-06 21:07:09,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5700 states to 5700 states and 6997 transitions. [2021-12-06 21:07:09,079 INFO L78 Accepts]: Start accepts. Automaton has 5700 states and 6997 transitions. Word has length 84 [2021-12-06 21:07:09,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:07:09,080 INFO L470 AbstractCegarLoop]: Abstraction has 5700 states and 6997 transitions. [2021-12-06 21:07:09,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 5 states have internal predecessors, (63), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-06 21:07:09,080 INFO L276 IsEmpty]: Start isEmpty. Operand 5700 states and 6997 transitions. [2021-12-06 21:07:09,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-06 21:07:09,082 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:07:09,082 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:07:09,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-06 21:07:09,083 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:07:09,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:07:09,083 INFO L85 PathProgramCache]: Analyzing trace with hash 1656161323, now seen corresponding path program 1 times [2021-12-06 21:07:09,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:07:09,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966452604] [2021-12-06 21:07:09,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:07:09,083 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:07:09,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:09,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 21:07:09,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:09,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 21:07:09,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:09,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-06 21:07:09,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:09,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 21:07:09,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:09,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 21:07:09,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:09,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 21:07:09,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:09,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-06 21:07:09,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:09,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-06 21:07:09,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:09,153 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 21:07:09,153 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:07:09,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966452604] [2021-12-06 21:07:09,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966452604] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:07:09,153 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:07:09,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-06 21:07:09,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537498269] [2021-12-06 21:07:09,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:07:09,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 21:07:09,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:07:09,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 21:07:09,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-12-06 21:07:09,154 INFO L87 Difference]: Start difference. First operand 5700 states and 6997 transitions. Second operand has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-06 21:07:10,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:07:10,199 INFO L93 Difference]: Finished difference Result 9347 states and 11355 transitions. [2021-12-06 21:07:10,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-06 21:07:10,200 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 93 [2021-12-06 21:07:10,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:07:10,209 INFO L225 Difference]: With dead ends: 9347 [2021-12-06 21:07:10,209 INFO L226 Difference]: Without dead ends: 4798 [2021-12-06 21:07:10,215 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=162, Invalid=540, Unknown=0, NotChecked=0, Total=702 [2021-12-06 21:07:10,216 INFO L933 BasicCegarLoop]: 796 mSDtfsCounter, 2044 mSDsluCounter, 2315 mSDsCounter, 0 mSdLazyCounter, 1489 mSolverCounterSat, 338 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2084 SdHoareTripleChecker+Valid, 3111 SdHoareTripleChecker+Invalid, 1827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 338 IncrementalHoareTripleChecker+Valid, 1489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 21:07:10,216 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2084 Valid, 3111 Invalid, 1827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [338 Valid, 1489 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-06 21:07:10,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4798 states. [2021-12-06 21:07:10,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4798 to 4367. [2021-12-06 21:07:10,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4367 states, 3413 states have (on average 1.2194550249047758) internal successors, (4162), 3478 states have internal predecessors, (4162), 467 states have call successors, (467), 379 states have call predecessors, (467), 485 states have return successors, (645), 514 states have call predecessors, (645), 464 states have call successors, (645) [2021-12-06 21:07:10,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4367 states to 4367 states and 5274 transitions. [2021-12-06 21:07:10,393 INFO L78 Accepts]: Start accepts. Automaton has 4367 states and 5274 transitions. Word has length 93 [2021-12-06 21:07:10,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:07:10,393 INFO L470 AbstractCegarLoop]: Abstraction has 4367 states and 5274 transitions. [2021-12-06 21:07:10,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-06 21:07:10,393 INFO L276 IsEmpty]: Start isEmpty. Operand 4367 states and 5274 transitions. [2021-12-06 21:07:10,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-12-06 21:07:10,397 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:07:10,398 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:07:10,398 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-06 21:07:10,398 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:07:10,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:07:10,398 INFO L85 PathProgramCache]: Analyzing trace with hash 887849757, now seen corresponding path program 1 times [2021-12-06 21:07:10,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:07:10,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381599106] [2021-12-06 21:07:10,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:07:10,399 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:07:10,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:10,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 21:07:10,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:10,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 21:07:10,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:10,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-06 21:07:10,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:10,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 21:07:10,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:10,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 21:07:10,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:10,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 21:07:10,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:10,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-06 21:07:10,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:10,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-06 21:07:10,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:10,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-06 21:07:10,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:10,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-06 21:07:10,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:10,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-06 21:07:10,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:10,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 21:07:10,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:10,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 21:07:10,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:10,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-06 21:07:10,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:10,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-06 21:07:10,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:10,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2021-12-06 21:07:10,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:10,498 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-12-06 21:07:10,498 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:07:10,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381599106] [2021-12-06 21:07:10,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381599106] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:07:10,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265133261] [2021-12-06 21:07:10,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:07:10,499 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:07:10,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbc9933-fe6e-41ae-ae4e-c3cef16b6efa/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:07:10,499 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbc9933-fe6e-41ae-ae4e-c3cef16b6efa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:07:10,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbc9933-fe6e-41ae-ae4e-c3cef16b6efa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 21:07:10,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:10,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 593 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-06 21:07:10,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:07:10,729 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 21:07:10,729 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 21:07:10,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265133261] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:07:10,729 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 21:07:10,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 12 [2021-12-06 21:07:10,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753198002] [2021-12-06 21:07:10,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:07:10,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 21:07:10,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:07:10,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 21:07:10,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-12-06 21:07:10,730 INFO L87 Difference]: Start difference. First operand 4367 states and 5274 transitions. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 5 states have internal predecessors, (106), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-06 21:07:10,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:07:10,843 INFO L93 Difference]: Finished difference Result 6587 states and 7913 transitions. [2021-12-06 21:07:10,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 21:07:10,843 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 5 states have internal predecessors, (106), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) Word has length 145 [2021-12-06 21:07:10,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:07:10,850 INFO L225 Difference]: With dead ends: 6587 [2021-12-06 21:07:10,850 INFO L226 Difference]: Without dead ends: 2648 [2021-12-06 21:07:10,856 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-12-06 21:07:10,857 INFO L933 BasicCegarLoop]: 777 mSDtfsCounter, 34 mSDsluCounter, 3071 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 3848 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 21:07:10,857 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 3848 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 21:07:10,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2648 states. [2021-12-06 21:07:10,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2648 to 2492. [2021-12-06 21:07:10,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2492 states, 2038 states have (on average 1.2433758586849852) internal successors, (2534), 2057 states have internal predecessors, (2534), 229 states have call successors, (229), 173 states have call predecessors, (229), 223 states have return successors, (309), 262 states have call predecessors, (309), 226 states have call successors, (309) [2021-12-06 21:07:10,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2492 states to 2492 states and 3072 transitions. [2021-12-06 21:07:10,988 INFO L78 Accepts]: Start accepts. Automaton has 2492 states and 3072 transitions. Word has length 145 [2021-12-06 21:07:10,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:07:10,988 INFO L470 AbstractCegarLoop]: Abstraction has 2492 states and 3072 transitions. [2021-12-06 21:07:10,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 5 states have internal predecessors, (106), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-06 21:07:10,988 INFO L276 IsEmpty]: Start isEmpty. Operand 2492 states and 3072 transitions. [2021-12-06 21:07:10,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-12-06 21:07:10,992 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:07:10,992 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-06 21:07:11,024 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbc9933-fe6e-41ae-ae4e-c3cef16b6efa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 21:07:11,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbc9933-fe6e-41ae-ae4e-c3cef16b6efa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-06 21:07:11,193 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:07:11,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:07:11,194 INFO L85 PathProgramCache]: Analyzing trace with hash 1402885593, now seen corresponding path program 1 times [2021-12-06 21:07:11,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:07:11,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904610671] [2021-12-06 21:07:11,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:07:11,194 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:07:11,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:11,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 21:07:11,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:11,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 21:07:11,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:11,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-06 21:07:11,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:11,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 21:07:11,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:11,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 21:07:11,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:11,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 21:07:11,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:11,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-06 21:07:11,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:11,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-06 21:07:11,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:11,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-06 21:07:11,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:11,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-06 21:07:11,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:11,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-06 21:07:11,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:11,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 21:07:11,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:11,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 21:07:11,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:11,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-12-06 21:07:11,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:11,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-12-06 21:07:11,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:11,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-06 21:07:11,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:11,337 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-12-06 21:07:11,337 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:07:11,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904610671] [2021-12-06 21:07:11,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904610671] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:07:11,338 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:07:11,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 21:07:11,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108589818] [2021-12-06 21:07:11,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:07:11,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 21:07:11,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:07:11,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 21:07:11,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-06 21:07:11,339 INFO L87 Difference]: Start difference. First operand 2492 states and 3072 transitions. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (13), 5 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-06 21:07:11,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:07:11,795 INFO L93 Difference]: Finished difference Result 2546 states and 3128 transitions. [2021-12-06 21:07:11,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 21:07:11,796 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (13), 5 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 147 [2021-12-06 21:07:11,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:07:11,800 INFO L225 Difference]: With dead ends: 2546 [2021-12-06 21:07:11,800 INFO L226 Difference]: Without dead ends: 2028 [2021-12-06 21:07:11,801 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-12-06 21:07:11,801 INFO L933 BasicCegarLoop]: 755 mSDtfsCounter, 793 mSDsluCounter, 1405 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 807 SdHoareTripleChecker+Valid, 2160 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 21:07:11,802 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [807 Valid, 2160 Invalid, 584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 477 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 21:07:11,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2028 states. [2021-12-06 21:07:11,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2028 to 1977. [2021-12-06 21:07:11,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1977 states, 1641 states have (on average 1.2693479585618526) internal successors, (2083), 1656 states have internal predecessors, (2083), 172 states have call successors, (172), 124 states have call predecessors, (172), 162 states have return successors, (231), 197 states have call predecessors, (231), 169 states have call successors, (231) [2021-12-06 21:07:11,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1977 states to 1977 states and 2486 transitions. [2021-12-06 21:07:11,892 INFO L78 Accepts]: Start accepts. Automaton has 1977 states and 2486 transitions. Word has length 147 [2021-12-06 21:07:11,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:07:11,892 INFO L470 AbstractCegarLoop]: Abstraction has 1977 states and 2486 transitions. [2021-12-06 21:07:11,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (13), 5 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-06 21:07:11,892 INFO L276 IsEmpty]: Start isEmpty. Operand 1977 states and 2486 transitions. [2021-12-06 21:07:11,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-12-06 21:07:11,897 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:07:11,897 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-06 21:07:11,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-06 21:07:11,897 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:07:11,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:07:11,898 INFO L85 PathProgramCache]: Analyzing trace with hash -1576195005, now seen corresponding path program 1 times [2021-12-06 21:07:11,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:07:11,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325049876] [2021-12-06 21:07:11,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:07:11,898 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:07:11,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:11,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 21:07:11,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:11,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 21:07:11,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:11,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-06 21:07:11,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:11,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 21:07:11,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:11,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 21:07:11,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:11,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 21:07:11,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:11,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-06 21:07:11,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:11,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-06 21:07:11,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:11,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-06 21:07:11,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:11,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-06 21:07:11,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:11,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-06 21:07:11,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:11,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 21:07:11,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:11,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 21:07:11,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:11,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2021-12-06 21:07:11,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:11,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2021-12-06 21:07:11,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:11,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2021-12-06 21:07:11,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:11,986 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-12-06 21:07:11,986 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:07:11,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325049876] [2021-12-06 21:07:11,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325049876] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:07:11,987 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:07:11,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 21:07:11,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437595025] [2021-12-06 21:07:11,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:07:11,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 21:07:11,987 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:07:11,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 21:07:11,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-06 21:07:11,988 INFO L87 Difference]: Start difference. First operand 1977 states and 2486 transitions. Second operand has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 4 states have internal predecessors, (94), 3 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-12-06 21:07:12,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:07:12,495 INFO L93 Difference]: Finished difference Result 3260 states and 4006 transitions. [2021-12-06 21:07:12,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 21:07:12,495 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 4 states have internal predecessors, (94), 3 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 159 [2021-12-06 21:07:12,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:07:12,499 INFO L225 Difference]: With dead ends: 3260 [2021-12-06 21:07:12,499 INFO L226 Difference]: Without dead ends: 1870 [2021-12-06 21:07:12,501 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-06 21:07:12,501 INFO L933 BasicCegarLoop]: 787 mSDtfsCounter, 1058 mSDsluCounter, 1547 mSDsCounter, 0 mSdLazyCounter, 914 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1059 SdHoareTripleChecker+Valid, 2334 SdHoareTripleChecker+Invalid, 1057 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 914 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 21:07:12,501 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1059 Valid, 2334 Invalid, 1057 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 914 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 21:07:12,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1870 states. [2021-12-06 21:07:12,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1870 to 1724. [2021-12-06 21:07:12,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1724 states, 1439 states have (on average 1.2876997915218902) internal successors, (1853), 1454 states have internal predecessors, (1853), 147 states have call successors, (147), 103 states have call predecessors, (147), 136 states have return successors, (193), 167 states have call predecessors, (193), 144 states have call successors, (193) [2021-12-06 21:07:12,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1724 states to 1724 states and 2193 transitions. [2021-12-06 21:07:12,559 INFO L78 Accepts]: Start accepts. Automaton has 1724 states and 2193 transitions. Word has length 159 [2021-12-06 21:07:12,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:07:12,559 INFO L470 AbstractCegarLoop]: Abstraction has 1724 states and 2193 transitions. [2021-12-06 21:07:12,559 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 4 states have internal predecessors, (94), 3 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-12-06 21:07:12,559 INFO L276 IsEmpty]: Start isEmpty. Operand 1724 states and 2193 transitions. [2021-12-06 21:07:12,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-12-06 21:07:12,561 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:07:12,561 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-06 21:07:12,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-06 21:07:12,561 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:07:12,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:07:12,562 INFO L85 PathProgramCache]: Analyzing trace with hash -1931976376, now seen corresponding path program 1 times [2021-12-06 21:07:12,562 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:07:12,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458751020] [2021-12-06 21:07:12,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:07:12,562 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:07:12,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:12,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 21:07:12,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:12,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 21:07:12,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:12,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-06 21:07:12,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:12,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 21:07:12,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:12,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 21:07:12,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:12,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 21:07:12,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:12,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-06 21:07:12,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:12,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-06 21:07:12,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:12,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-06 21:07:12,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:12,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-06 21:07:12,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:12,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-06 21:07:12,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:12,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 21:07:12,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:12,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 21:07:12,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:12,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-06 21:07:12,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:12,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2021-12-06 21:07:12,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:12,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-06 21:07:12,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:12,674 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 25 proven. 7 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-12-06 21:07:12,674 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:07:12,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458751020] [2021-12-06 21:07:12,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458751020] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:07:12,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199225608] [2021-12-06 21:07:12,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:07:12,675 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:07:12,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbc9933-fe6e-41ae-ae4e-c3cef16b6efa/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:07:12,676 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbc9933-fe6e-41ae-ae4e-c3cef16b6efa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:07:12,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbc9933-fe6e-41ae-ae4e-c3cef16b6efa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 21:07:12,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:12,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 658 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-06 21:07:12,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:07:12,943 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-12-06 21:07:12,943 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 21:07:12,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199225608] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:07:12,943 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 21:07:12,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 11 [2021-12-06 21:07:12,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068344424] [2021-12-06 21:07:12,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:07:12,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 21:07:12,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:07:12,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 21:07:12,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-12-06 21:07:12,944 INFO L87 Difference]: Start difference. First operand 1724 states and 2193 transitions. Second operand has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 2 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-12-06 21:07:13,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:07:13,280 INFO L93 Difference]: Finished difference Result 4050 states and 5001 transitions. [2021-12-06 21:07:13,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 21:07:13,280 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 2 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 162 [2021-12-06 21:07:13,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:07:13,286 INFO L225 Difference]: With dead ends: 4050 [2021-12-06 21:07:13,286 INFO L226 Difference]: Without dead ends: 2640 [2021-12-06 21:07:13,288 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-12-06 21:07:13,289 INFO L933 BasicCegarLoop]: 763 mSDtfsCounter, 398 mSDsluCounter, 755 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 403 SdHoareTripleChecker+Valid, 1518 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 21:07:13,289 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [403 Valid, 1518 Invalid, 484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 21:07:13,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2640 states. [2021-12-06 21:07:13,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2640 to 2598. [2021-12-06 21:07:13,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2598 states, 2170 states have (on average 1.23963133640553) internal successors, (2690), 2189 states have internal predecessors, (2690), 217 states have call successors, (217), 154 states have call predecessors, (217), 209 states have return successors, (304), 255 states have call predecessors, (304), 214 states have call successors, (304) [2021-12-06 21:07:13,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2598 states to 2598 states and 3211 transitions. [2021-12-06 21:07:13,381 INFO L78 Accepts]: Start accepts. Automaton has 2598 states and 3211 transitions. Word has length 162 [2021-12-06 21:07:13,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:07:13,382 INFO L470 AbstractCegarLoop]: Abstraction has 2598 states and 3211 transitions. [2021-12-06 21:07:13,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 2 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-12-06 21:07:13,382 INFO L276 IsEmpty]: Start isEmpty. Operand 2598 states and 3211 transitions. [2021-12-06 21:07:13,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-06 21:07:13,384 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:07:13,384 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:07:13,404 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbc9933-fe6e-41ae-ae4e-c3cef16b6efa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 21:07:13,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbc9933-fe6e-41ae-ae4e-c3cef16b6efa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-06 21:07:13,585 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:07:13,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:07:13,586 INFO L85 PathProgramCache]: Analyzing trace with hash 1228190577, now seen corresponding path program 1 times [2021-12-06 21:07:13,586 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:07:13,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836326543] [2021-12-06 21:07:13,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:07:13,586 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:07:13,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:13,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 21:07:13,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:13,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-06 21:07:13,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:13,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-06 21:07:13,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:13,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-06 21:07:13,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:13,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-06 21:07:13,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:13,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:07:13,716 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:07:13,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836326543] [2021-12-06 21:07:13,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836326543] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:07:13,717 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:07:13,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 21:07:13,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757696702] [2021-12-06 21:07:13,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:07:13,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 21:07:13,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:07:13,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 21:07:13,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 21:07:13,718 INFO L87 Difference]: Start difference. First operand 2598 states and 3211 transitions. Second operand has 5 states, 5 states have (on average 35.8) internal successors, (179), 3 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 21:07:15,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:07:15,205 INFO L93 Difference]: Finished difference Result 3154 states and 4115 transitions. [2021-12-06 21:07:15,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 21:07:15,206 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 35.8) internal successors, (179), 3 states have internal predecessors, (179), 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 190 [2021-12-06 21:07:15,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:07:15,211 INFO L225 Difference]: With dead ends: 3154 [2021-12-06 21:07:15,211 INFO L226 Difference]: Without dead ends: 2751 [2021-12-06 21:07:15,212 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-06 21:07:15,213 INFO L933 BasicCegarLoop]: 840 mSDtfsCounter, 1221 mSDsluCounter, 633 mSDsCounter, 0 mSdLazyCounter, 830 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1246 SdHoareTripleChecker+Valid, 1473 SdHoareTripleChecker+Invalid, 926 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 830 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-06 21:07:15,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1246 Valid, 1473 Invalid, 926 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 830 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-06 21:07:15,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2751 states. [2021-12-06 21:07:15,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2751 to 2598. [2021-12-06 21:07:15,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2598 states, 2170 states have (on average 1.2391705069124423) internal successors, (2689), 2189 states have internal predecessors, (2689), 217 states have call successors, (217), 154 states have call predecessors, (217), 209 states have return successors, (304), 255 states have call predecessors, (304), 214 states have call successors, (304) [2021-12-06 21:07:15,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2598 states to 2598 states and 3210 transitions. [2021-12-06 21:07:15,385 INFO L78 Accepts]: Start accepts. Automaton has 2598 states and 3210 transitions. Word has length 190 [2021-12-06 21:07:15,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:07:15,386 INFO L470 AbstractCegarLoop]: Abstraction has 2598 states and 3210 transitions. [2021-12-06 21:07:15,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 35.8) internal successors, (179), 3 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 21:07:15,386 INFO L276 IsEmpty]: Start isEmpty. Operand 2598 states and 3210 transitions. [2021-12-06 21:07:15,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-06 21:07:15,387 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:07:15,387 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:07:15,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-06 21:07:15,388 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:07:15,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:07:15,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1718643149, now seen corresponding path program 1 times [2021-12-06 21:07:15,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:07:15,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861424601] [2021-12-06 21:07:15,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:07:15,388 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:07:15,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:15,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 21:07:15,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:15,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-06 21:07:15,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:15,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-06 21:07:15,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:15,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-06 21:07:15,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:15,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-06 21:07:15,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:15,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:07:15,490 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:07:15,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861424601] [2021-12-06 21:07:15,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861424601] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:07:15,490 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:07:15,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 21:07:15,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562320592] [2021-12-06 21:07:15,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:07:15,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 21:07:15,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:07:15,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 21:07:15,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 21:07:15,491 INFO L87 Difference]: Start difference. First operand 2598 states and 3210 transitions. Second operand has 5 states, 5 states have (on average 35.8) internal successors, (179), 3 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 21:07:16,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:07:16,941 INFO L93 Difference]: Finished difference Result 3146 states and 4098 transitions. [2021-12-06 21:07:16,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 21:07:16,941 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 35.8) internal successors, (179), 3 states have internal predecessors, (179), 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 190 [2021-12-06 21:07:16,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:07:16,946 INFO L225 Difference]: With dead ends: 3146 [2021-12-06 21:07:16,946 INFO L226 Difference]: Without dead ends: 2751 [2021-12-06 21:07:16,948 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-06 21:07:16,948 INFO L933 BasicCegarLoop]: 839 mSDtfsCounter, 1212 mSDsluCounter, 632 mSDsCounter, 0 mSdLazyCounter, 829 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1237 SdHoareTripleChecker+Valid, 1471 SdHoareTripleChecker+Invalid, 925 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 829 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-06 21:07:16,948 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1237 Valid, 1471 Invalid, 925 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 829 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-06 21:07:16,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2751 states. [2021-12-06 21:07:17,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2751 to 2598. [2021-12-06 21:07:17,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2598 states, 2170 states have (on average 1.238709677419355) internal successors, (2688), 2189 states have internal predecessors, (2688), 217 states have call successors, (217), 154 states have call predecessors, (217), 209 states have return successors, (304), 255 states have call predecessors, (304), 214 states have call successors, (304) [2021-12-06 21:07:17,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2598 states to 2598 states and 3209 transitions. [2021-12-06 21:07:17,121 INFO L78 Accepts]: Start accepts. Automaton has 2598 states and 3209 transitions. Word has length 190 [2021-12-06 21:07:17,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:07:17,122 INFO L470 AbstractCegarLoop]: Abstraction has 2598 states and 3209 transitions. [2021-12-06 21:07:17,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 35.8) internal successors, (179), 3 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 21:07:17,122 INFO L276 IsEmpty]: Start isEmpty. Operand 2598 states and 3209 transitions. [2021-12-06 21:07:17,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-06 21:07:17,123 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:07:17,123 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:07:17,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-06 21:07:17,124 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:07:17,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:07:17,124 INFO L85 PathProgramCache]: Analyzing trace with hash -887989515, now seen corresponding path program 1 times [2021-12-06 21:07:17,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:07:17,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931811136] [2021-12-06 21:07:17,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:07:17,124 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:07:17,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:17,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 21:07:17,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:17,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-06 21:07:17,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:17,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-06 21:07:17,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:17,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-06 21:07:17,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:17,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-06 21:07:17,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:17,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:07:17,224 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:07:17,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931811136] [2021-12-06 21:07:17,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931811136] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:07:17,224 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:07:17,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 21:07:17,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520858126] [2021-12-06 21:07:17,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:07:17,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 21:07:17,225 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:07:17,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 21:07:17,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-06 21:07:17,225 INFO L87 Difference]: Start difference. First operand 2598 states and 3209 transitions. Second operand has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 4 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 21:07:19,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:07:19,711 INFO L93 Difference]: Finished difference Result 3700 states and 5000 transitions. [2021-12-06 21:07:19,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 21:07:19,712 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 4 states have internal predecessors, (179), 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 190 [2021-12-06 21:07:19,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:07:19,717 INFO L225 Difference]: With dead ends: 3700 [2021-12-06 21:07:19,717 INFO L226 Difference]: Without dead ends: 3312 [2021-12-06 21:07:19,718 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-12-06 21:07:19,719 INFO L933 BasicCegarLoop]: 883 mSDtfsCounter, 1901 mSDsluCounter, 1264 mSDsCounter, 0 mSdLazyCounter, 2202 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1931 SdHoareTripleChecker+Valid, 2147 SdHoareTripleChecker+Invalid, 2367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 2202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-06 21:07:19,719 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1931 Valid, 2147 Invalid, 2367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 2202 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-06 21:07:19,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3312 states. [2021-12-06 21:07:19,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3312 to 3005. [2021-12-06 21:07:19,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3005 states, 2548 states have (on average 1.293171114599686) internal successors, (3295), 2568 states have internal predecessors, (3295), 239 states have call successors, (239), 160 states have call predecessors, (239), 216 states have return successors, (329), 277 states have call predecessors, (329), 236 states have call successors, (329) [2021-12-06 21:07:19,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3005 states to 3005 states and 3863 transitions. [2021-12-06 21:07:19,909 INFO L78 Accepts]: Start accepts. Automaton has 3005 states and 3863 transitions. Word has length 190 [2021-12-06 21:07:19,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:07:19,909 INFO L470 AbstractCegarLoop]: Abstraction has 3005 states and 3863 transitions. [2021-12-06 21:07:19,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 4 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 21:07:19,909 INFO L276 IsEmpty]: Start isEmpty. Operand 3005 states and 3863 transitions. [2021-12-06 21:07:19,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-06 21:07:19,910 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:07:19,911 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:07:19,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-06 21:07:19,911 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:07:19,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:07:19,911 INFO L85 PathProgramCache]: Analyzing trace with hash 1559951345, now seen corresponding path program 1 times [2021-12-06 21:07:19,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:07:19,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25622117] [2021-12-06 21:07:19,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:07:19,912 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:07:19,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:19,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 21:07:19,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:19,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-06 21:07:19,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:19,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-06 21:07:20,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:20,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-06 21:07:20,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:20,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-06 21:07:20,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:20,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:07:20,013 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:07:20,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25622117] [2021-12-06 21:07:20,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25622117] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:07:20,014 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:07:20,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 21:07:20,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063025583] [2021-12-06 21:07:20,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:07:20,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 21:07:20,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:07:20,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 21:07:20,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 21:07:20,015 INFO L87 Difference]: Start difference. First operand 3005 states and 3863 transitions. Second operand has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 21:07:23,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:07:23,171 INFO L93 Difference]: Finished difference Result 4688 states and 6603 transitions. [2021-12-06 21:07:23,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 21:07:23,172 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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 190 [2021-12-06 21:07:23,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:07:23,177 INFO L225 Difference]: With dead ends: 4688 [2021-12-06 21:07:23,177 INFO L226 Difference]: Without dead ends: 3893 [2021-12-06 21:07:23,179 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-06 21:07:23,180 INFO L933 BasicCegarLoop]: 957 mSDtfsCounter, 2045 mSDsluCounter, 1681 mSDsCounter, 0 mSdLazyCounter, 3126 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2075 SdHoareTripleChecker+Valid, 2638 SdHoareTripleChecker+Invalid, 3280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 3126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-06 21:07:23,180 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2075 Valid, 2638 Invalid, 3280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 3126 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-06 21:07:23,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3893 states. [2021-12-06 21:07:23,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3893 to 3383. [2021-12-06 21:07:23,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3383 states, 2897 states have (on average 1.3268898860890577) internal successors, (3844), 2918 states have internal predecessors, (3844), 261 states have call successors, (261), 166 states have call predecessors, (261), 223 states have return successors, (353), 300 states have call predecessors, (353), 258 states have call successors, (353) [2021-12-06 21:07:23,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3383 states to 3383 states and 4458 transitions. [2021-12-06 21:07:23,391 INFO L78 Accepts]: Start accepts. Automaton has 3383 states and 4458 transitions. Word has length 190 [2021-12-06 21:07:23,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:07:23,391 INFO L470 AbstractCegarLoop]: Abstraction has 3383 states and 4458 transitions. [2021-12-06 21:07:23,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 21:07:23,391 INFO L276 IsEmpty]: Start isEmpty. Operand 3383 states and 4458 transitions. [2021-12-06 21:07:23,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-06 21:07:23,393 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:07:23,393 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:07:23,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-06 21:07:23,394 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:07:23,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:07:23,394 INFO L85 PathProgramCache]: Analyzing trace with hash -363299085, now seen corresponding path program 1 times [2021-12-06 21:07:23,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:07:23,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247398210] [2021-12-06 21:07:23,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:07:23,394 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:07:23,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:23,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 21:07:23,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:23,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-06 21:07:23,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:23,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-06 21:07:23,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:23,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-06 21:07:23,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:23,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-06 21:07:23,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:23,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:07:23,503 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:07:23,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247398210] [2021-12-06 21:07:23,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247398210] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:07:23,503 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:07:23,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 21:07:23,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092110535] [2021-12-06 21:07:23,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:07:23,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 21:07:23,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:07:23,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 21:07:23,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-06 21:07:23,505 INFO L87 Difference]: Start difference. First operand 3383 states and 4458 transitions. Second operand has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 21:07:25,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:07:25,286 INFO L93 Difference]: Finished difference Result 5086 states and 7246 transitions. [2021-12-06 21:07:25,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 21:07:25,287 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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 190 [2021-12-06 21:07:25,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:07:25,293 INFO L225 Difference]: With dead ends: 5086 [2021-12-06 21:07:25,293 INFO L226 Difference]: Without dead ends: 3913 [2021-12-06 21:07:25,295 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 [2021-12-06 21:07:25,296 INFO L933 BasicCegarLoop]: 821 mSDtfsCounter, 1430 mSDsluCounter, 1237 mSDsCounter, 0 mSdLazyCounter, 1733 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1461 SdHoareTripleChecker+Valid, 2058 SdHoareTripleChecker+Invalid, 1858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 1733 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-06 21:07:25,296 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1461 Valid, 2058 Invalid, 1858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 1733 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-06 21:07:25,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3913 states. [2021-12-06 21:07:25,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3913 to 3383. [2021-12-06 21:07:25,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3383 states, 2897 states have (on average 1.3258543320676561) internal successors, (3841), 2918 states have internal predecessors, (3841), 261 states have call successors, (261), 166 states have call predecessors, (261), 223 states have return successors, (353), 300 states have call predecessors, (353), 258 states have call successors, (353) [2021-12-06 21:07:25,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3383 states to 3383 states and 4455 transitions. [2021-12-06 21:07:25,509 INFO L78 Accepts]: Start accepts. Automaton has 3383 states and 4455 transitions. Word has length 190 [2021-12-06 21:07:25,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:07:25,509 INFO L470 AbstractCegarLoop]: Abstraction has 3383 states and 4455 transitions. [2021-12-06 21:07:25,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 21:07:25,510 INFO L276 IsEmpty]: Start isEmpty. Operand 3383 states and 4455 transitions. [2021-12-06 21:07:25,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-06 21:07:25,511 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:07:25,511 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:07:25,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-06 21:07:25,512 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:07:25,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:07:25,512 INFO L85 PathProgramCache]: Analyzing trace with hash -2087907407, now seen corresponding path program 1 times [2021-12-06 21:07:25,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:07:25,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564776629] [2021-12-06 21:07:25,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:07:25,512 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:07:25,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:25,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 21:07:25,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:25,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-06 21:07:25,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:25,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-06 21:07:25,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:25,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-06 21:07:25,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:25,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-06 21:07:25,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:25,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:07:25,618 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:07:25,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564776629] [2021-12-06 21:07:25,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564776629] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:07:25,619 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:07:25,619 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 21:07:25,619 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724950001] [2021-12-06 21:07:25,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:07:25,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 21:07:25,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:07:25,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 21:07:25,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-06 21:07:25,620 INFO L87 Difference]: Start difference. First operand 3383 states and 4455 transitions. Second operand has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 21:07:27,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:07:27,337 INFO L93 Difference]: Finished difference Result 5082 states and 7230 transitions. [2021-12-06 21:07:27,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 21:07:27,337 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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 190 [2021-12-06 21:07:27,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:07:27,344 INFO L225 Difference]: With dead ends: 5082 [2021-12-06 21:07:27,344 INFO L226 Difference]: Without dead ends: 3909 [2021-12-06 21:07:27,347 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 [2021-12-06 21:07:27,347 INFO L933 BasicCegarLoop]: 817 mSDtfsCounter, 1428 mSDsluCounter, 1237 mSDsCounter, 0 mSdLazyCounter, 1727 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1459 SdHoareTripleChecker+Valid, 2054 SdHoareTripleChecker+Invalid, 1852 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 1727 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-06 21:07:27,347 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1459 Valid, 2054 Invalid, 1852 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 1727 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-06 21:07:27,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3909 states. [2021-12-06 21:07:27,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3909 to 3383. [2021-12-06 21:07:27,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3383 states, 2897 states have (on average 1.3248187780462548) internal successors, (3838), 2918 states have internal predecessors, (3838), 261 states have call successors, (261), 166 states have call predecessors, (261), 223 states have return successors, (353), 300 states have call predecessors, (353), 258 states have call successors, (353) [2021-12-06 21:07:27,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3383 states to 3383 states and 4452 transitions. [2021-12-06 21:07:27,579 INFO L78 Accepts]: Start accepts. Automaton has 3383 states and 4452 transitions. Word has length 190 [2021-12-06 21:07:27,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:07:27,579 INFO L470 AbstractCegarLoop]: Abstraction has 3383 states and 4452 transitions. [2021-12-06 21:07:27,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 21:07:27,579 INFO L276 IsEmpty]: Start isEmpty. Operand 3383 states and 4452 transitions. [2021-12-06 21:07:27,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-06 21:07:27,581 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:07:27,581 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:07:27,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-06 21:07:27,581 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:07:27,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:07:27,581 INFO L85 PathProgramCache]: Analyzing trace with hash -1589350605, now seen corresponding path program 1 times [2021-12-06 21:07:27,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:07:27,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760933192] [2021-12-06 21:07:27,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:07:27,582 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:07:27,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:27,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 21:07:27,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:27,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-06 21:07:27,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:27,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-06 21:07:27,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:27,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-06 21:07:27,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:27,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-06 21:07:27,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:27,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:07:27,687 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:07:27,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760933192] [2021-12-06 21:07:27,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760933192] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:07:27,688 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:07:27,688 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 21:07:27,688 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33197635] [2021-12-06 21:07:27,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:07:27,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 21:07:27,688 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:07:27,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 21:07:27,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-06 21:07:27,689 INFO L87 Difference]: Start difference. First operand 3383 states and 4452 transitions. Second operand has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 21:07:29,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:07:29,231 INFO L93 Difference]: Finished difference Result 5077 states and 7212 transitions. [2021-12-06 21:07:29,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 21:07:29,232 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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 190 [2021-12-06 21:07:29,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:07:29,237 INFO L225 Difference]: With dead ends: 5077 [2021-12-06 21:07:29,238 INFO L226 Difference]: Without dead ends: 3904 [2021-12-06 21:07:29,240 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 [2021-12-06 21:07:29,241 INFO L933 BasicCegarLoop]: 811 mSDtfsCounter, 1660 mSDsluCounter, 970 mSDsCounter, 0 mSdLazyCounter, 1520 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1691 SdHoareTripleChecker+Valid, 1781 SdHoareTripleChecker+Invalid, 1692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 1520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-06 21:07:29,241 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1691 Valid, 1781 Invalid, 1692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 1520 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-06 21:07:29,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3904 states. [2021-12-06 21:07:29,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3904 to 3383. [2021-12-06 21:07:29,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3383 states, 2897 states have (on average 1.3237832240248533) internal successors, (3835), 2918 states have internal predecessors, (3835), 261 states have call successors, (261), 166 states have call predecessors, (261), 223 states have return successors, (353), 300 states have call predecessors, (353), 258 states have call successors, (353) [2021-12-06 21:07:29,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3383 states to 3383 states and 4449 transitions. [2021-12-06 21:07:29,480 INFO L78 Accepts]: Start accepts. Automaton has 3383 states and 4449 transitions. Word has length 190 [2021-12-06 21:07:29,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:07:29,480 INFO L470 AbstractCegarLoop]: Abstraction has 3383 states and 4449 transitions. [2021-12-06 21:07:29,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 21:07:29,480 INFO L276 IsEmpty]: Start isEmpty. Operand 3383 states and 4449 transitions. [2021-12-06 21:07:29,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-06 21:07:29,482 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:07:29,482 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:07:29,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-06 21:07:29,482 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:07:29,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:07:29,482 INFO L85 PathProgramCache]: Analyzing trace with hash -1019078799, now seen corresponding path program 1 times [2021-12-06 21:07:29,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:07:29,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441495539] [2021-12-06 21:07:29,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:07:29,483 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:07:29,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:29,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 21:07:29,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:29,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-06 21:07:29,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:29,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-06 21:07:29,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:29,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-06 21:07:29,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:29,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-06 21:07:29,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:29,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:07:29,586 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:07:29,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441495539] [2021-12-06 21:07:29,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441495539] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:07:29,586 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:07:29,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 21:07:29,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850253019] [2021-12-06 21:07:29,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:07:29,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 21:07:29,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:07:29,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 21:07:29,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-06 21:07:29,587 INFO L87 Difference]: Start difference. First operand 3383 states and 4449 transitions. Second operand has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 21:07:31,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:07:31,373 INFO L93 Difference]: Finished difference Result 5069 states and 7188 transitions. [2021-12-06 21:07:31,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 21:07:31,374 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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 190 [2021-12-06 21:07:31,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:07:31,379 INFO L225 Difference]: With dead ends: 5069 [2021-12-06 21:07:31,380 INFO L226 Difference]: Without dead ends: 3896 [2021-12-06 21:07:31,382 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 [2021-12-06 21:07:31,383 INFO L933 BasicCegarLoop]: 805 mSDtfsCounter, 1425 mSDsluCounter, 1237 mSDsCounter, 0 mSdLazyCounter, 1694 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1456 SdHoareTripleChecker+Valid, 2042 SdHoareTripleChecker+Invalid, 1822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 1694 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-06 21:07:31,383 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1456 Valid, 2042 Invalid, 1822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 1694 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-06 21:07:31,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3896 states. [2021-12-06 21:07:31,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3896 to 3383. [2021-12-06 21:07:31,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3383 states, 2897 states have (on average 1.322747670003452) internal successors, (3832), 2918 states have internal predecessors, (3832), 261 states have call successors, (261), 166 states have call predecessors, (261), 223 states have return successors, (353), 300 states have call predecessors, (353), 258 states have call successors, (353) [2021-12-06 21:07:31,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3383 states to 3383 states and 4446 transitions. [2021-12-06 21:07:31,624 INFO L78 Accepts]: Start accepts. Automaton has 3383 states and 4446 transitions. Word has length 190 [2021-12-06 21:07:31,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:07:31,624 INFO L470 AbstractCegarLoop]: Abstraction has 3383 states and 4446 transitions. [2021-12-06 21:07:31,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 21:07:31,625 INFO L276 IsEmpty]: Start isEmpty. Operand 3383 states and 4446 transitions. [2021-12-06 21:07:31,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-06 21:07:31,626 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:07:31,626 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:07:31,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-06 21:07:31,626 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:07:31,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:07:31,627 INFO L85 PathProgramCache]: Analyzing trace with hash -1805076689, now seen corresponding path program 1 times [2021-12-06 21:07:31,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:07:31,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107077065] [2021-12-06 21:07:31,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:07:31,627 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:07:31,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:31,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 21:07:31,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:31,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-06 21:07:31,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:31,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-06 21:07:31,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:31,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-06 21:07:31,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:31,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-06 21:07:31,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:31,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:07:31,719 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:07:31,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107077065] [2021-12-06 21:07:31,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107077065] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:07:31,719 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:07:31,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 21:07:31,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035727758] [2021-12-06 21:07:31,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:07:31,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 21:07:31,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:07:31,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 21:07:31,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 21:07:31,720 INFO L87 Difference]: Start difference. First operand 3383 states and 4446 transitions. Second operand has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 21:07:34,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:07:34,805 INFO L93 Difference]: Finished difference Result 6122 states and 8852 transitions. [2021-12-06 21:07:34,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 21:07:34,806 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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 190 [2021-12-06 21:07:34,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:07:34,821 INFO L225 Difference]: With dead ends: 6122 [2021-12-06 21:07:34,822 INFO L226 Difference]: Without dead ends: 4949 [2021-12-06 21:07:34,826 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-06 21:07:34,826 INFO L933 BasicCegarLoop]: 1180 mSDtfsCounter, 1909 mSDsluCounter, 2354 mSDsCounter, 0 mSdLazyCounter, 3384 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1939 SdHoareTripleChecker+Valid, 3534 SdHoareTripleChecker+Invalid, 3514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 3384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-06 21:07:34,826 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1939 Valid, 3534 Invalid, 3514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 3384 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-06 21:07:34,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4949 states. [2021-12-06 21:07:35,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4949 to 4152. [2021-12-06 21:07:35,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4152 states, 3608 states have (on average 1.3697339246119733) internal successors, (4942), 3631 states have internal predecessors, (4942), 305 states have call successors, (305), 178 states have call predecessors, (305), 237 states have return successors, (405), 346 states have call predecessors, (405), 302 states have call successors, (405) [2021-12-06 21:07:35,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4152 states to 4152 states and 5652 transitions. [2021-12-06 21:07:35,140 INFO L78 Accepts]: Start accepts. Automaton has 4152 states and 5652 transitions. Word has length 190 [2021-12-06 21:07:35,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:07:35,140 INFO L470 AbstractCegarLoop]: Abstraction has 4152 states and 5652 transitions. [2021-12-06 21:07:35,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 21:07:35,140 INFO L276 IsEmpty]: Start isEmpty. Operand 4152 states and 5652 transitions. [2021-12-06 21:07:35,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-06 21:07:35,142 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:07:35,142 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:07:35,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-12-06 21:07:35,143 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:07:35,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:07:35,143 INFO L85 PathProgramCache]: Analyzing trace with hash -1137694799, now seen corresponding path program 1 times [2021-12-06 21:07:35,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:07:35,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866283757] [2021-12-06 21:07:35,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:07:35,143 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:07:35,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:35,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 21:07:35,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:35,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-06 21:07:35,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:35,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-06 21:07:35,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:35,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-06 21:07:35,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:35,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-06 21:07:35,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:35,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:07:35,238 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:07:35,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866283757] [2021-12-06 21:07:35,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866283757] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:07:35,238 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:07:35,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 21:07:35,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937266281] [2021-12-06 21:07:35,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:07:35,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 21:07:35,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:07:35,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 21:07:35,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-06 21:07:35,239 INFO L87 Difference]: Start difference. First operand 4152 states and 5652 transitions. Second operand has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 21:07:37,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:07:37,096 INFO L93 Difference]: Finished difference Result 6875 states and 10043 transitions. [2021-12-06 21:07:37,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 21:07:37,097 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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 190 [2021-12-06 21:07:37,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:07:37,105 INFO L225 Difference]: With dead ends: 6875 [2021-12-06 21:07:37,105 INFO L226 Difference]: Without dead ends: 4933 [2021-12-06 21:07:37,109 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 [2021-12-06 21:07:37,110 INFO L933 BasicCegarLoop]: 798 mSDtfsCounter, 1424 mSDsluCounter, 1237 mSDsCounter, 0 mSdLazyCounter, 1670 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1455 SdHoareTripleChecker+Valid, 2035 SdHoareTripleChecker+Invalid, 1799 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 1670 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-06 21:07:37,110 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1455 Valid, 2035 Invalid, 1799 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 1670 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-06 21:07:37,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4933 states. [2021-12-06 21:07:37,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4933 to 4152. [2021-12-06 21:07:37,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4152 states, 3608 states have (on average 1.3683481152993349) internal successors, (4937), 3631 states have internal predecessors, (4937), 305 states have call successors, (305), 178 states have call predecessors, (305), 237 states have return successors, (405), 346 states have call predecessors, (405), 302 states have call successors, (405) [2021-12-06 21:07:37,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4152 states to 4152 states and 5647 transitions. [2021-12-06 21:07:37,425 INFO L78 Accepts]: Start accepts. Automaton has 4152 states and 5647 transitions. Word has length 190 [2021-12-06 21:07:37,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:07:37,425 INFO L470 AbstractCegarLoop]: Abstraction has 4152 states and 5647 transitions. [2021-12-06 21:07:37,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 21:07:37,426 INFO L276 IsEmpty]: Start isEmpty. Operand 4152 states and 5647 transitions. [2021-12-06 21:07:37,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-06 21:07:37,428 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:07:37,428 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:07:37,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-12-06 21:07:37,428 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:07:37,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:07:37,428 INFO L85 PathProgramCache]: Analyzing trace with hash 962043631, now seen corresponding path program 1 times [2021-12-06 21:07:37,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:07:37,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546346344] [2021-12-06 21:07:37,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:07:37,429 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:07:37,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:37,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 21:07:37,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:37,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-06 21:07:37,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:37,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-06 21:07:37,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:37,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-06 21:07:37,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:37,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-06 21:07:37,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:37,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:07:37,529 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:07:37,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546346344] [2021-12-06 21:07:37,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546346344] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:07:37,530 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:07:37,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 21:07:37,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462147743] [2021-12-06 21:07:37,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:07:37,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 21:07:37,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:07:37,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 21:07:37,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 21:07:37,531 INFO L87 Difference]: Start difference. First operand 4152 states and 5647 transitions. Second operand has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 21:07:40,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:07:40,808 INFO L93 Difference]: Finished difference Result 8917 states and 13252 transitions. [2021-12-06 21:07:40,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 21:07:40,808 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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 190 [2021-12-06 21:07:40,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:07:40,822 INFO L225 Difference]: With dead ends: 8917 [2021-12-06 21:07:40,822 INFO L226 Difference]: Without dead ends: 6975 [2021-12-06 21:07:40,827 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-06 21:07:40,827 INFO L933 BasicCegarLoop]: 896 mSDtfsCounter, 2007 mSDsluCounter, 1616 mSDsCounter, 0 mSdLazyCounter, 3000 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2037 SdHoareTripleChecker+Valid, 2512 SdHoareTripleChecker+Invalid, 3180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 3000 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-06 21:07:40,827 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2037 Valid, 2512 Invalid, 3180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 3000 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-06 21:07:40,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6975 states. [2021-12-06 21:07:41,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6975 to 5688. [2021-12-06 21:07:41,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5688 states, 5028 states have (on average 1.4206443914081146) internal successors, (7143), 5055 states have internal predecessors, (7143), 393 states have call successors, (393), 202 states have call predecessors, (393), 265 states have return successors, (515), 438 states have call predecessors, (515), 390 states have call successors, (515) [2021-12-06 21:07:41,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5688 states to 5688 states and 8051 transitions. [2021-12-06 21:07:41,272 INFO L78 Accepts]: Start accepts. Automaton has 5688 states and 8051 transitions. Word has length 190 [2021-12-06 21:07:41,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:07:41,272 INFO L470 AbstractCegarLoop]: Abstraction has 5688 states and 8051 transitions. [2021-12-06 21:07:41,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 21:07:41,272 INFO L276 IsEmpty]: Start isEmpty. Operand 5688 states and 8051 transitions. [2021-12-06 21:07:41,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-06 21:07:41,274 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:07:41,275 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:07:41,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-12-06 21:07:41,275 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:07:41,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:07:41,275 INFO L85 PathProgramCache]: Analyzing trace with hash 1306871793, now seen corresponding path program 1 times [2021-12-06 21:07:41,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:07:41,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371109019] [2021-12-06 21:07:41,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:07:41,275 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:07:41,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:41,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 21:07:41,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:41,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-06 21:07:41,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:41,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-06 21:07:41,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:41,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-06 21:07:41,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:41,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-06 21:07:41,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:41,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:07:41,366 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:07:41,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371109019] [2021-12-06 21:07:41,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371109019] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:07:41,366 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:07:41,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 21:07:41,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670024034] [2021-12-06 21:07:41,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:07:41,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 21:07:41,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:07:41,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 21:07:41,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 21:07:41,367 INFO L87 Difference]: Start difference. First operand 5688 states and 8051 transitions. Second operand has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 21:07:45,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:07:45,251 INFO L93 Difference]: Finished difference Result 14511 states and 22102 transitions. [2021-12-06 21:07:45,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 21:07:45,252 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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 190 [2021-12-06 21:07:45,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:07:45,276 INFO L225 Difference]: With dead ends: 14511 [2021-12-06 21:07:45,276 INFO L226 Difference]: Without dead ends: 11033 [2021-12-06 21:07:45,285 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-06 21:07:45,286 INFO L933 BasicCegarLoop]: 1164 mSDtfsCounter, 1897 mSDsluCounter, 2354 mSDsCounter, 0 mSdLazyCounter, 3345 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1927 SdHoareTripleChecker+Valid, 3518 SdHoareTripleChecker+Invalid, 3475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 3345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-06 21:07:45,286 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1927 Valid, 3518 Invalid, 3475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 3345 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-06 21:07:45,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11033 states. [2021-12-06 21:07:45,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11033 to 8765. [2021-12-06 21:07:45,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8765 states, 7873 states have (on average 1.4684364282992506) internal successors, (11561), 7908 states have internal predecessors, (11561), 569 states have call successors, (569), 250 states have call predecessors, (569), 321 states have return successors, (753), 622 states have call predecessors, (753), 566 states have call successors, (753) [2021-12-06 21:07:46,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8765 states to 8765 states and 12883 transitions. [2021-12-06 21:07:46,011 INFO L78 Accepts]: Start accepts. Automaton has 8765 states and 12883 transitions. Word has length 190 [2021-12-06 21:07:46,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:07:46,012 INFO L470 AbstractCegarLoop]: Abstraction has 8765 states and 12883 transitions. [2021-12-06 21:07:46,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 21:07:46,012 INFO L276 IsEmpty]: Start isEmpty. Operand 8765 states and 12883 transitions. [2021-12-06 21:07:46,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-06 21:07:46,015 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:07:46,015 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:07:46,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-12-06 21:07:46,015 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:07:46,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:07:46,015 INFO L85 PathProgramCache]: Analyzing trace with hash -2007140689, now seen corresponding path program 1 times [2021-12-06 21:07:46,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:07:46,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997268891] [2021-12-06 21:07:46,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:07:46,016 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:07:46,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:46,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 21:07:46,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:46,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-06 21:07:46,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:46,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-06 21:07:46,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:46,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-06 21:07:46,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:46,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-06 21:07:46,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:46,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:07:46,104 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:07:46,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997268891] [2021-12-06 21:07:46,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997268891] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:07:46,105 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:07:46,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 21:07:46,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183143124] [2021-12-06 21:07:46,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:07:46,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 21:07:46,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:07:46,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 21:07:46,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 21:07:46,106 INFO L87 Difference]: Start difference. First operand 8765 states and 12883 transitions. Second operand has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 21:07:50,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:07:50,895 INFO L93 Difference]: Finished difference Result 25698 states and 39860 transitions. [2021-12-06 21:07:50,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 21:07:50,895 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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 190 [2021-12-06 21:07:50,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:07:50,933 INFO L225 Difference]: With dead ends: 25698 [2021-12-06 21:07:50,933 INFO L226 Difference]: Without dead ends: 19143 [2021-12-06 21:07:50,945 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-06 21:07:50,946 INFO L933 BasicCegarLoop]: 1159 mSDtfsCounter, 1896 mSDsluCounter, 2354 mSDsCounter, 0 mSdLazyCounter, 3337 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1926 SdHoareTripleChecker+Valid, 3513 SdHoareTripleChecker+Invalid, 3467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 3337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-06 21:07:50,946 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1926 Valid, 3513 Invalid, 3467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 3337 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-06 21:07:50,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19143 states. [2021-12-06 21:07:52,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19143 to 14934. [2021-12-06 21:07:52,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14934 states, 13578 states have (on average 1.5038297245544263) internal successors, (20419), 13629 states have internal predecessors, (20419), 921 states have call successors, (921), 346 states have call predecessors, (921), 433 states have return successors, (1283), 990 states have call predecessors, (1283), 918 states have call successors, (1283) [2021-12-06 21:07:52,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14934 states to 14934 states and 22623 transitions. [2021-12-06 21:07:52,203 INFO L78 Accepts]: Start accepts. Automaton has 14934 states and 22623 transitions. Word has length 190 [2021-12-06 21:07:52,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:07:52,203 INFO L470 AbstractCegarLoop]: Abstraction has 14934 states and 22623 transitions. [2021-12-06 21:07:52,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 21:07:52,203 INFO L276 IsEmpty]: Start isEmpty. Operand 14934 states and 22623 transitions. [2021-12-06 21:07:52,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-06 21:07:52,208 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:07:52,208 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:07:52,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-12-06 21:07:52,208 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:07:52,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:07:52,209 INFO L85 PathProgramCache]: Analyzing trace with hash 518354993, now seen corresponding path program 1 times [2021-12-06 21:07:52,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:07:52,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968486565] [2021-12-06 21:07:52,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:07:52,209 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:07:52,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:52,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 21:07:52,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:52,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-06 21:07:52,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:52,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-06 21:07:52,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:52,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-06 21:07:52,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:52,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-06 21:07:52,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:52,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:07:52,292 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:07:52,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968486565] [2021-12-06 21:07:52,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968486565] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:07:52,292 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:07:52,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 21:07:52,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557611875] [2021-12-06 21:07:52,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:07:52,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 21:07:52,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:07:52,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 21:07:52,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 21:07:52,293 INFO L87 Difference]: Start difference. First operand 14934 states and 22623 transitions. Second operand has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 21:07:58,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:07:58,809 INFO L93 Difference]: Finished difference Result 48073 states and 75570 transitions. [2021-12-06 21:07:58,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 21:07:58,809 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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 190 [2021-12-06 21:07:58,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:07:58,885 INFO L225 Difference]: With dead ends: 48073 [2021-12-06 21:07:58,885 INFO L226 Difference]: Without dead ends: 35349 [2021-12-06 21:07:58,908 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-06 21:07:58,908 INFO L933 BasicCegarLoop]: 1152 mSDtfsCounter, 1898 mSDsluCounter, 2354 mSDsCounter, 0 mSdLazyCounter, 3326 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1928 SdHoareTripleChecker+Valid, 3506 SdHoareTripleChecker+Invalid, 3459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 3326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-06 21:07:58,909 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1928 Valid, 3506 Invalid, 3459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 3326 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-06 21:07:58,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35349 states. [2021-12-06 21:08:01,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35349 to 27303. [2021-12-06 21:08:01,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27303 states, 25019 states have (on average 1.5260801790639114) internal successors, (38181), 25102 states have internal predecessors, (38181), 1625 states have call successors, (1625), 538 states have call predecessors, (1625), 657 states have return successors, (2505), 1726 states have call predecessors, (2505), 1622 states have call successors, (2505) [2021-12-06 21:08:01,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27303 states to 27303 states and 42311 transitions. [2021-12-06 21:08:01,365 INFO L78 Accepts]: Start accepts. Automaton has 27303 states and 42311 transitions. Word has length 190 [2021-12-06 21:08:01,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:08:01,366 INFO L470 AbstractCegarLoop]: Abstraction has 27303 states and 42311 transitions. [2021-12-06 21:08:01,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 21:08:01,366 INFO L276 IsEmpty]: Start isEmpty. Operand 27303 states and 42311 transitions. [2021-12-06 21:08:01,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-06 21:08:01,375 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:08:01,376 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:08:01,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-12-06 21:08:01,376 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:08:01,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:08:01,376 INFO L85 PathProgramCache]: Analyzing trace with hash -92914065, now seen corresponding path program 1 times [2021-12-06 21:08:01,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:08:01,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300793065] [2021-12-06 21:08:01,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:08:01,377 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:08:01,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:08:01,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 21:08:01,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:08:01,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-06 21:08:01,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:08:01,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-06 21:08:01,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:08:01,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-06 21:08:01,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:08:01,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-06 21:08:01,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:08:01,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:08:01,466 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:08:01,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300793065] [2021-12-06 21:08:01,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300793065] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:08:01,466 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:08:01,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 21:08:01,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386942142] [2021-12-06 21:08:01,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:08:01,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 21:08:01,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:08:01,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 21:08:01,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 21:08:01,467 INFO L87 Difference]: Start difference. First operand 27303 states and 42311 transitions. Second operand has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 21:08:15,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:08:15,172 INFO L93 Difference]: Finished difference Result 104982 states and 166278 transitions. [2021-12-06 21:08:15,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 21:08:15,172 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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 190 [2021-12-06 21:08:15,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:08:15,381 INFO L225 Difference]: With dead ends: 104982 [2021-12-06 21:08:15,381 INFO L226 Difference]: Without dead ends: 79889 [2021-12-06 21:08:15,450 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-06 21:08:15,451 INFO L933 BasicCegarLoop]: 1357 mSDtfsCounter, 2026 mSDsluCounter, 2346 mSDsCounter, 0 mSdLazyCounter, 3922 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2055 SdHoareTripleChecker+Valid, 3703 SdHoareTripleChecker+Invalid, 4057 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 3922 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-12-06 21:08:15,451 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2055 Valid, 3703 Invalid, 4057 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 3922 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2021-12-06 21:08:15,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79889 states. [2021-12-06 21:08:20,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79889 to 51977. [2021-12-06 21:08:20,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51977 states, 47901 states have (on average 1.5406985240391642) internal successors, (73801), 48048 states have internal predecessors, (73801), 2969 states have call successors, (2969), 922 states have call predecessors, (2969), 1105 states have return successors, (5371), 3134 states have call predecessors, (5371), 2966 states have call successors, (5371) [2021-12-06 21:08:20,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51977 states to 51977 states and 82141 transitions. [2021-12-06 21:08:20,559 INFO L78 Accepts]: Start accepts. Automaton has 51977 states and 82141 transitions. Word has length 190 [2021-12-06 21:08:20,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:08:20,559 INFO L470 AbstractCegarLoop]: Abstraction has 51977 states and 82141 transitions. [2021-12-06 21:08:20,559 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 21:08:20,559 INFO L276 IsEmpty]: Start isEmpty. Operand 51977 states and 82141 transitions. [2021-12-06 21:08:20,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-06 21:08:20,575 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:08:20,576 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:08:20,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-12-06 21:08:20,576 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:08:20,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:08:20,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1801419821, now seen corresponding path program 1 times [2021-12-06 21:08:20,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:08:20,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917735171] [2021-12-06 21:08:20,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:08:20,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:08:20,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:08:20,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 21:08:20,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:08:20,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-06 21:08:20,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:08:20,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-06 21:08:20,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:08:20,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-06 21:08:20,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:08:20,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-06 21:08:20,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:08:20,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:08:20,662 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:08:20,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917735171] [2021-12-06 21:08:20,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917735171] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:08:20,662 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:08:20,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 21:08:20,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427238764] [2021-12-06 21:08:20,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:08:20,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 21:08:20,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:08:20,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 21:08:20,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 21:08:20,663 INFO L87 Difference]: Start difference. First operand 51977 states and 82141 transitions. Second operand has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 21:08:44,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:08:44,863 INFO L93 Difference]: Finished difference Result 204598 states and 327790 transitions. [2021-12-06 21:08:44,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 21:08:44,863 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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 190 [2021-12-06 21:08:44,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:08:45,289 INFO L225 Difference]: With dead ends: 204598 [2021-12-06 21:08:45,289 INFO L226 Difference]: Without dead ends: 154831 [2021-12-06 21:08:45,420 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-06 21:08:45,420 INFO L933 BasicCegarLoop]: 1135 mSDtfsCounter, 2377 mSDsluCounter, 2343 mSDsCounter, 0 mSdLazyCounter, 3292 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2421 SdHoareTripleChecker+Valid, 3478 SdHoareTripleChecker+Invalid, 3430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 3292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-06 21:08:45,420 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2421 Valid, 3478 Invalid, 3430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 3292 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-12-06 21:08:45,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154831 states. [2021-12-06 21:08:55,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154831 to 99978. [2021-12-06 21:08:55,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99978 states, 92382 states have (on average 1.5457015435907429) internal successors, (142795), 92657 states have internal predecessors, (142795), 5593 states have call successors, (5593), 1690 states have call predecessors, (5593), 2001 states have return successors, (12497), 5886 states have call predecessors, (12497), 5590 states have call successors, (12497) [2021-12-06 21:08:55,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99978 states to 99978 states and 160885 transitions. [2021-12-06 21:08:55,990 INFO L78 Accepts]: Start accepts. Automaton has 99978 states and 160885 transitions. Word has length 190 [2021-12-06 21:08:55,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:08:55,990 INFO L470 AbstractCegarLoop]: Abstraction has 99978 states and 160885 transitions. [2021-12-06 21:08:55,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 21:08:55,990 INFO L276 IsEmpty]: Start isEmpty. Operand 99978 states and 160885 transitions. [2021-12-06 21:08:56,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-06 21:08:56,019 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:08:56,019 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:08:56,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-12-06 21:08:56,020 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:08:56,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:08:56,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1046966609, now seen corresponding path program 1 times [2021-12-06 21:08:56,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:08:56,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482764936] [2021-12-06 21:08:56,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:08:56,020 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:08:56,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:08:56,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 21:08:56,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:08:56,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-06 21:08:56,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:08:56,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-06 21:08:56,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:08:56,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-06 21:08:56,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:08:56,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-06 21:08:56,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:08:56,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:08:56,109 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:08:56,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482764936] [2021-12-06 21:08:56,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482764936] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:08:56,109 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:08:56,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 21:08:56,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316125413] [2021-12-06 21:08:56,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:08:56,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 21:08:56,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:08:56,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 21:08:56,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-06 21:08:56,110 INFO L87 Difference]: Start difference. First operand 99978 states and 160885 transitions. Second operand has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 21:09:13,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:09:13,759 INFO L93 Difference]: Finished difference Result 229511 states and 377428 transitions. [2021-12-06 21:09:13,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 21:09:13,760 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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 190 [2021-12-06 21:09:13,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:09:14,168 INFO L225 Difference]: With dead ends: 229511 [2021-12-06 21:09:14,168 INFO L226 Difference]: Without dead ends: 131743 [2021-12-06 21:09:14,369 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 [2021-12-06 21:09:14,369 INFO L933 BasicCegarLoop]: 772 mSDtfsCounter, 1658 mSDsluCounter, 968 mSDsCounter, 0 mSdLazyCounter, 1442 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1689 SdHoareTripleChecker+Valid, 1740 SdHoareTripleChecker+Invalid, 1620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 1442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-06 21:09:14,369 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1689 Valid, 1740 Invalid, 1620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 1442 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-06 21:09:14,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131743 states. [2021-12-06 21:09:25,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131743 to 99978. [2021-12-06 21:09:25,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99978 states, 92382 states have (on average 1.5429196163754844) internal successors, (142538), 92657 states have internal predecessors, (142538), 5593 states have call successors, (5593), 1690 states have call predecessors, (5593), 2001 states have return successors, (12497), 5886 states have call predecessors, (12497), 5590 states have call successors, (12497) [2021-12-06 21:09:25,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99978 states to 99978 states and 160628 transitions. [2021-12-06 21:09:25,660 INFO L78 Accepts]: Start accepts. Automaton has 99978 states and 160628 transitions. Word has length 190 [2021-12-06 21:09:25,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:09:25,660 INFO L470 AbstractCegarLoop]: Abstraction has 99978 states and 160628 transitions. [2021-12-06 21:09:25,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 21:09:25,660 INFO L276 IsEmpty]: Start isEmpty. Operand 99978 states and 160628 transitions. [2021-12-06 21:09:25,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-06 21:09:25,681 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:09:25,682 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:09:25,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-12-06 21:09:25,682 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:09:25,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:09:25,682 INFO L85 PathProgramCache]: Analyzing trace with hash -1970134035, now seen corresponding path program 1 times [2021-12-06 21:09:25,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:09:25,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201741354] [2021-12-06 21:09:25,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:09:25,683 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:09:25,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:09:25,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 21:09:25,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:09:25,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-06 21:09:25,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:09:25,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-06 21:09:25,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:09:25,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-06 21:09:25,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:09:25,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-06 21:09:25,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:09:25,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:09:25,767 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:09:25,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201741354] [2021-12-06 21:09:25,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201741354] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:09:25,767 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:09:25,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 21:09:25,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117163582] [2021-12-06 21:09:25,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:09:25,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 21:09:25,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:09:25,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 21:09:25,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 21:09:25,768 INFO L87 Difference]: Start difference. First operand 99978 states and 160628 transitions. Second operand has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 21:10:11,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:10:11,892 INFO L93 Difference]: Finished difference Result 393779 states and 638908 transitions. [2021-12-06 21:10:11,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 21:10:11,892 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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 190 [2021-12-06 21:10:11,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:10:12,902 INFO L225 Difference]: With dead ends: 393779 [2021-12-06 21:10:12,902 INFO L226 Difference]: Without dead ends: 296011 [2021-12-06 21:10:13,278 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-06 21:10:13,278 INFO L933 BasicCegarLoop]: 870 mSDtfsCounter, 2387 mSDsluCounter, 1612 mSDsCounter, 0 mSdLazyCounter, 2944 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2431 SdHoareTripleChecker+Valid, 2482 SdHoareTripleChecker+Invalid, 3130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 2944 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-06 21:10:13,279 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2431 Valid, 2482 Invalid, 3130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 2944 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-12-06 21:10:13,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296011 states. [2021-12-06 21:10:35,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296011 to 197388. [2021-12-06 21:10:35,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197388 states, 182880 states have (on average 1.5472331583552057) internal successors, (282958), 183411 states have internal predecessors, (282958), 10713 states have call successors, (10713), 3226 states have call predecessors, (10713), 3793 states have return successors, (30995), 11262 states have call predecessors, (30995), 10710 states have call successors, (30995) [2021-12-06 21:10:36,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197388 states to 197388 states and 324666 transitions. [2021-12-06 21:10:36,275 INFO L78 Accepts]: Start accepts. Automaton has 197388 states and 324666 transitions. Word has length 190 [2021-12-06 21:10:36,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:10:36,275 INFO L470 AbstractCegarLoop]: Abstraction has 197388 states and 324666 transitions. [2021-12-06 21:10:36,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 21:10:36,276 INFO L276 IsEmpty]: Start isEmpty. Operand 197388 states and 324666 transitions. [2021-12-06 21:10:36,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-06 21:10:36,325 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:10:36,325 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:10:36,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-12-06 21:10:36,325 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:10:36,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:10:36,326 INFO L85 PathProgramCache]: Analyzing trace with hash -1584271633, now seen corresponding path program 1 times [2021-12-06 21:10:36,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:10:36,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914722118] [2021-12-06 21:10:36,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:10:36,326 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:10:36,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:36,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 21:10:36,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:36,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-06 21:10:36,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:36,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-06 21:10:36,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:36,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-06 21:10:36,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:36,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-06 21:10:36,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:36,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:10:36,413 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:10:36,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914722118] [2021-12-06 21:10:36,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914722118] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:10:36,413 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:10:36,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 21:10:36,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728603954] [2021-12-06 21:10:36,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:10:36,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 21:10:36,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:10:36,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 21:10:36,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 21:10:36,414 INFO L87 Difference]: Start difference. First operand 197388 states and 324666 transitions. Second operand has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 21:12:08,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:12:08,489 INFO L93 Difference]: Finished difference Result 775091 states and 1284932 transitions. [2021-12-06 21:12:08,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 21:12:08,489 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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 190 [2021-12-06 21:12:08,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:12:10,621 INFO L225 Difference]: With dead ends: 775091 [2021-12-06 21:12:10,621 INFO L226 Difference]: Without dead ends: 579913 [2021-12-06 21:12:11,299 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-06 21:12:11,299 INFO L933 BasicCegarLoop]: 1120 mSDtfsCounter, 2252 mSDsluCounter, 2346 mSDsCounter, 0 mSdLazyCounter, 3258 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2296 SdHoareTripleChecker+Valid, 3466 SdHoareTripleChecker+Invalid, 3396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 3258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-12-06 21:12:11,300 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2296 Valid, 3466 Invalid, 3396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 3258 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2021-12-06 21:12:11,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579913 states. [2021-12-06 21:12:56,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579913 to 391949. [2021-12-06 21:12:56,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391949 states, 363873 states have (on average 1.5501232572903183) internal successors, (564048), 364916 states have internal predecessors, (564048), 20697 states have call successors, (20697), 6298 states have call predecessors, (20697), 7377 states have return successors, (80857), 21758 states have call predecessors, (80857), 20694 states have call successors, (80857) [2021-12-06 21:12:58,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391949 states to 391949 states and 665602 transitions. [2021-12-06 21:12:58,910 INFO L78 Accepts]: Start accepts. Automaton has 391949 states and 665602 transitions. Word has length 190 [2021-12-06 21:12:58,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:12:58,910 INFO L470 AbstractCegarLoop]: Abstraction has 391949 states and 665602 transitions. [2021-12-06 21:12:58,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 21:12:58,910 INFO L276 IsEmpty]: Start isEmpty. Operand 391949 states and 665602 transitions. [2021-12-06 21:12:59,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-06 21:12:59,014 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:12:59,015 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:12:59,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-12-06 21:12:59,015 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:12:59,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:12:59,015 INFO L85 PathProgramCache]: Analyzing trace with hash -1848919123, now seen corresponding path program 1 times [2021-12-06 21:12:59,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:12:59,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883742176] [2021-12-06 21:12:59,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:12:59,016 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:12:59,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:12:59,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 21:12:59,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:12:59,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-06 21:12:59,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:12:59,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-06 21:12:59,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:12:59,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-06 21:12:59,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:12:59,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-06 21:12:59,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:12:59,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:12:59,109 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:12:59,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883742176] [2021-12-06 21:12:59,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883742176] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:12:59,109 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:12:59,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 21:12:59,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283284335] [2021-12-06 21:12:59,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:12:59,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 21:12:59,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:12:59,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 21:12:59,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 21:12:59,110 INFO L87 Difference]: Start difference. First operand 391949 states and 665602 transitions. Second operand has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 21:16:05,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:16:05,278 INFO L93 Difference]: Finished difference Result 1528242 states and 2614362 transitions. [2021-12-06 21:16:05,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 21:16:05,278 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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 190 [2021-12-06 21:16:05,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:16:10,246 INFO L225 Difference]: With dead ends: 1528242 [2021-12-06 21:16:10,247 INFO L226 Difference]: Without dead ends: 1138503 [2021-12-06 21:16:12,068 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-06 21:16:12,069 INFO L933 BasicCegarLoop]: 1255 mSDtfsCounter, 1965 mSDsluCounter, 2346 mSDsCounter, 0 mSdLazyCounter, 3704 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1994 SdHoareTripleChecker+Valid, 3601 SdHoareTripleChecker+Invalid, 3839 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 3704 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-12-06 21:16:12,069 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1994 Valid, 3601 Invalid, 3839 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 3704 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2021-12-06 21:16:12,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1138503 states. [2021-12-06 21:17:46,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1138503 to 780558. [2021-12-06 21:17:47,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 780558 states, 725858 states have (on average 1.5522843310950627) internal successors, (1126738), 727925 states have internal predecessors, (1126738), 40153 states have call successors, (40153), 12442 states have call predecessors, (40153), 14545 states have return successors, (219435), 42238 states have call predecessors, (219435), 40150 states have call successors, (219435) [2021-12-06 21:17:52,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780558 states to 780558 states and 1386326 transitions. [2021-12-06 21:17:52,532 INFO L78 Accepts]: Start accepts. Automaton has 780558 states and 1386326 transitions. Word has length 190 [2021-12-06 21:17:52,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:17:52,532 INFO L470 AbstractCegarLoop]: Abstraction has 780558 states and 1386326 transitions. [2021-12-06 21:17:52,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 21:17:52,532 INFO L276 IsEmpty]: Start isEmpty. Operand 780558 states and 1386326 transitions. [2021-12-06 21:17:52,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-06 21:17:52,756 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:17:52,756 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:17:52,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-12-06 21:17:52,756 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:17:52,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:17:52,756 INFO L85 PathProgramCache]: Analyzing trace with hash 82206511, now seen corresponding path program 1 times [2021-12-06 21:17:52,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:17:52,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229516479] [2021-12-06 21:17:52,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:17:52,757 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:17:52,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:17:52,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 21:17:52,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:17:52,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-06 21:17:52,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:17:52,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-06 21:17:52,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:17:52,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-06 21:17:52,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:17:52,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-06 21:17:52,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:17:52,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:17:52,868 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:17:52,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229516479] [2021-12-06 21:17:52,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229516479] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:17:52,868 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:17:52,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 21:17:52,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961796882] [2021-12-06 21:17:52,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:17:52,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 21:17:52,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:17:52,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 21:17:52,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 21:17:52,869 INFO L87 Difference]: Start difference. First operand 780558 states and 1386326 transitions. Second operand has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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)