./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.12.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a85781-0bdd-41e1-8f07-077010e9cfb7/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a85781-0bdd-41e1-8f07-077010e9cfb7/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_65a85781-0bdd-41e1-8f07-077010e9cfb7/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a85781-0bdd-41e1-8f07-077010e9cfb7/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.12.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a85781-0bdd-41e1-8f07-077010e9cfb7/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_65a85781-0bdd-41e1-8f07-077010e9cfb7/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 cb07c62e0c8f9c002ab72b797de071664dce20871b109c1b4c0b79acbb73493c --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 20:01:34,490 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 20:01:34,492 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 20:01:34,521 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 20:01:34,522 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 20:01:34,523 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 20:01:34,525 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 20:01:34,527 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 20:01:34,529 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 20:01:34,530 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 20:01:34,531 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 20:01:34,533 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 20:01:34,533 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 20:01:34,534 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 20:01:34,536 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 20:01:34,537 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 20:01:34,538 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 20:01:34,539 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 20:01:34,541 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 20:01:34,544 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 20:01:34,546 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 20:01:34,547 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 20:01:34,548 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 20:01:34,549 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 20:01:34,553 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 20:01:34,553 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 20:01:34,553 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 20:01:34,554 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 20:01:34,555 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 20:01:34,556 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 20:01:34,556 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 20:01:34,557 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 20:01:34,558 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 20:01:34,559 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 20:01:34,559 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 20:01:34,560 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 20:01:34,560 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 20:01:34,560 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 20:01:34,561 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 20:01:34,561 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 20:01:34,562 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 20:01:34,563 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a85781-0bdd-41e1-8f07-077010e9cfb7/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 20:01:34,584 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 20:01:34,584 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 20:01:34,585 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 20:01:34,585 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 20:01:34,586 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 20:01:34,586 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 20:01:34,586 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 20:01:34,586 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 20:01:34,587 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 20:01:34,587 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 20:01:34,587 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 20:01:34,587 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 20:01:34,587 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 20:01:34,588 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 20:01:34,588 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 20:01:34,588 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 20:01:34,588 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 20:01:34,588 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 20:01:34,588 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 20:01:34,589 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 20:01:34,589 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 20:01:34,589 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 20:01:34,589 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 20:01:34,589 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 20:01:34,589 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 20:01:34,590 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 20:01:34,590 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 20:01:34,590 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 20:01:34,590 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 20:01:34,590 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 20:01:34,591 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 20:01:34,591 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 20:01:34,591 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 20:01:34,591 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 20:01:34,591 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_65a85781-0bdd-41e1-8f07-077010e9cfb7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a85781-0bdd-41e1-8f07-077010e9cfb7/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cb07c62e0c8f9c002ab72b797de071664dce20871b109c1b4c0b79acbb73493c [2021-12-06 20:01:34,790 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 20:01:34,804 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 20:01:34,806 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 20:01:34,807 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 20:01:34,807 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 20:01:34,808 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a85781-0bdd-41e1-8f07-077010e9cfb7/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.12.cil-2.c [2021-12-06 20:01:34,848 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a85781-0bdd-41e1-8f07-077010e9cfb7/bin/uautomizer-DrprNOufMa/data/d5a365627/88eddb1a74ff416ea26b033d996e7ebb/FLAGc890c99be [2021-12-06 20:01:35,252 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 20:01:35,252 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a85781-0bdd-41e1-8f07-077010e9cfb7/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.12.cil-2.c [2021-12-06 20:01:35,265 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a85781-0bdd-41e1-8f07-077010e9cfb7/bin/uautomizer-DrprNOufMa/data/d5a365627/88eddb1a74ff416ea26b033d996e7ebb/FLAGc890c99be [2021-12-06 20:01:35,274 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a85781-0bdd-41e1-8f07-077010e9cfb7/bin/uautomizer-DrprNOufMa/data/d5a365627/88eddb1a74ff416ea26b033d996e7ebb [2021-12-06 20:01:35,276 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 20:01:35,277 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 20:01:35,278 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 20:01:35,278 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 20:01:35,281 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 20:01:35,281 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 08:01:35" (1/1) ... [2021-12-06 20:01:35,282 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@368aea79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:01:35, skipping insertion in model container [2021-12-06 20:01:35,283 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 08:01:35" (1/1) ... [2021-12-06 20:01:35,288 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 20:01:35,322 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 20:01:35,447 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_65a85781-0bdd-41e1-8f07-077010e9cfb7/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.12.cil-2.c[913,926] [2021-12-06 20:01:35,486 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_65a85781-0bdd-41e1-8f07-077010e9cfb7/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.12.cil-2.c[5977,5990] [2021-12-06 20:01:35,584 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 20:01:35,594 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 20:01:35,604 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_65a85781-0bdd-41e1-8f07-077010e9cfb7/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.12.cil-2.c[913,926] [2021-12-06 20:01:35,618 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_65a85781-0bdd-41e1-8f07-077010e9cfb7/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.12.cil-2.c[5977,5990] [2021-12-06 20:01:35,667 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 20:01:35,687 INFO L208 MainTranslator]: Completed translation [2021-12-06 20:01:35,687 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:01:35 WrapperNode [2021-12-06 20:01:35,687 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 20:01:35,688 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 20:01:35,688 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 20:01:35,688 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 20:01:35,694 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:01:35" (1/1) ... [2021-12-06 20:01:35,711 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:01:35" (1/1) ... [2021-12-06 20:01:35,754 INFO L137 Inliner]: procedures = 72, calls = 84, calls flagged for inlining = 47, calls inlined = 47, statements flattened = 1055 [2021-12-06 20:01:35,755 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 20:01:35,755 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 20:01:35,755 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 20:01:35,756 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 20:01:35,764 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:01:35" (1/1) ... [2021-12-06 20:01:35,764 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:01:35" (1/1) ... [2021-12-06 20:01:35,769 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:01:35" (1/1) ... [2021-12-06 20:01:35,769 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:01:35" (1/1) ... [2021-12-06 20:01:35,784 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:01:35" (1/1) ... [2021-12-06 20:01:35,803 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:01:35" (1/1) ... [2021-12-06 20:01:35,807 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:01:35" (1/1) ... [2021-12-06 20:01:35,814 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 20:01:35,815 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 20:01:35,815 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 20:01:35,816 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 20:01:35,816 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:01:35" (1/1) ... [2021-12-06 20:01:35,824 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 20:01:35,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a85781-0bdd-41e1-8f07-077010e9cfb7/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:01:35,844 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a85781-0bdd-41e1-8f07-077010e9cfb7/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 20:01:35,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a85781-0bdd-41e1-8f07-077010e9cfb7/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 20:01:35,875 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 20:01:35,876 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-06 20:01:35,876 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-06 20:01:35,876 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2021-12-06 20:01:35,876 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2021-12-06 20:01:35,876 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2021-12-06 20:01:35,876 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2021-12-06 20:01:35,877 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2021-12-06 20:01:35,877 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2021-12-06 20:01:35,877 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2021-12-06 20:01:35,877 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2021-12-06 20:01:35,877 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2021-12-06 20:01:35,877 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2021-12-06 20:01:35,877 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2021-12-06 20:01:35,877 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2021-12-06 20:01:35,878 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 20:01:35,878 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2021-12-06 20:01:35,878 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2021-12-06 20:01:35,878 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 20:01:35,878 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 20:01:35,878 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2021-12-06 20:01:35,878 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2021-12-06 20:01:35,986 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 20:01:35,987 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 20:01:36,521 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 20:01:36,530 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 20:01:36,530 INFO L301 CfgBuilder]: Removed 19 assume(true) statements. [2021-12-06 20:01:36,532 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 08:01:36 BoogieIcfgContainer [2021-12-06 20:01:36,532 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 20:01:36,533 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 20:01:36,533 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 20:01:36,536 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 20:01:36,536 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 08:01:35" (1/3) ... [2021-12-06 20:01:36,537 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@718f0aa1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 08:01:36, skipping insertion in model container [2021-12-06 20:01:36,537 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:01:35" (2/3) ... [2021-12-06 20:01:36,537 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@718f0aa1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 08:01:36, skipping insertion in model container [2021-12-06 20:01:36,537 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 08:01:36" (3/3) ... [2021-12-06 20:01:36,538 INFO L111 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-2+token_ring.12.cil-2.c [2021-12-06 20:01:36,542 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 20:01:36,542 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-06 20:01:36,578 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 20:01:36,583 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 20:01:36,583 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-06 20:01:36,604 INFO L276 IsEmpty]: Start isEmpty. Operand has 454 states, 410 states have (on average 1.648780487804878) internal successors, (676), 415 states have internal predecessors, (676), 32 states have call successors, (32), 9 states have call predecessors, (32), 9 states have return successors, (32), 31 states have call predecessors, (32), 32 states have call successors, (32) [2021-12-06 20:01:36,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-06 20:01:36,610 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:01:36,611 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:01:36,611 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:01:36,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:01:36,615 INFO L85 PathProgramCache]: Analyzing trace with hash -1427645478, now seen corresponding path program 1 times [2021-12-06 20:01:36,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:01:36,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073114200] [2021-12-06 20:01:36,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:01:36,623 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:01:36,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:01:36,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 20:01:36,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:01:36,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 20:01:36,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:01:36,830 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 20:01:36,830 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:01:36,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073114200] [2021-12-06 20:01:36,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073114200] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:01:36,831 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:01:36,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 20:01:36,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630268610] [2021-12-06 20:01:36,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:01:36,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 20:01:36,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:01:36,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 20:01:36,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 20:01:36,865 INFO L87 Difference]: Start difference. First operand has 454 states, 410 states have (on average 1.648780487804878) internal successors, (676), 415 states have internal predecessors, (676), 32 states have call successors, (32), 9 states have call predecessors, (32), 9 states have return successors, (32), 31 states have call predecessors, (32), 32 states have call successors, (32) Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 20:01:37,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:01:37,103 INFO L93 Difference]: Finished difference Result 953 states and 1548 transitions. [2021-12-06 20:01:37,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 20:01:37,105 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 44 [2021-12-06 20:01:37,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:01:37,123 INFO L225 Difference]: With dead ends: 953 [2021-12-06 20:01:37,123 INFO L226 Difference]: Without dead ends: 514 [2021-12-06 20:01:37,130 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 20:01:37,134 INFO L933 BasicCegarLoop]: 705 mSDtfsCounter, 944 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 970 SdHoareTripleChecker+Valid, 1120 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:01:37,135 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [970 Valid, 1120 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 20:01:37,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2021-12-06 20:01:37,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 508. [2021-12-06 20:01:37,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 508 states, 459 states have (on average 1.5315904139433552) internal successors, (703), 463 states have internal predecessors, (703), 36 states have call successors, (36), 11 states have call predecessors, (36), 11 states have return successors, (40), 34 states have call predecessors, (40), 34 states have call successors, (40) [2021-12-06 20:01:37,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 779 transitions. [2021-12-06 20:01:37,214 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 779 transitions. Word has length 44 [2021-12-06 20:01:37,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:01:37,215 INFO L470 AbstractCegarLoop]: Abstraction has 508 states and 779 transitions. [2021-12-06 20:01:37,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 20:01:37,215 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 779 transitions. [2021-12-06 20:01:37,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-06 20:01:37,218 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:01:37,218 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:01:37,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 20:01:37,219 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:01:37,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:01:37,219 INFO L85 PathProgramCache]: Analyzing trace with hash 2087439571, now seen corresponding path program 1 times [2021-12-06 20:01:37,219 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:01:37,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543369602] [2021-12-06 20:01:37,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:01:37,220 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:01:37,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:01:37,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 20:01:37,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:01:37,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-06 20:01:37,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:01:37,293 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 20:01:37,293 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:01:37,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543369602] [2021-12-06 20:01:37,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543369602] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:01:37,293 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:01:37,293 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 20:01:37,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342520901] [2021-12-06 20:01:37,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:01:37,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 20:01:37,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:01:37,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 20:01:37,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 20:01:37,295 INFO L87 Difference]: Start difference. First operand 508 states and 779 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 20:01:37,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:01:37,594 INFO L93 Difference]: Finished difference Result 756 states and 1119 transitions. [2021-12-06 20:01:37,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 20:01:37,595 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2021-12-06 20:01:37,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:01:37,599 INFO L225 Difference]: With dead ends: 756 [2021-12-06 20:01:37,599 INFO L226 Difference]: Without dead ends: 632 [2021-12-06 20:01:37,600 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 20:01:37,601 INFO L933 BasicCegarLoop]: 734 mSDtfsCounter, 368 mSDsluCounter, 742 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 370 SdHoareTripleChecker+Valid, 1476 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 20:01:37,602 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [370 Valid, 1476 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 20:01:37,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2021-12-06 20:01:37,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 575. [2021-12-06 20:01:37,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 520 states have (on average 1.5134615384615384) internal successors, (787), 524 states have internal predecessors, (787), 39 states have call successors, (39), 14 states have call predecessors, (39), 14 states have return successors, (43), 37 states have call predecessors, (43), 37 states have call successors, (43) [2021-12-06 20:01:37,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 869 transitions. [2021-12-06 20:01:37,632 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 869 transitions. Word has length 45 [2021-12-06 20:01:37,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:01:37,632 INFO L470 AbstractCegarLoop]: Abstraction has 575 states and 869 transitions. [2021-12-06 20:01:37,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 20:01:37,632 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 869 transitions. [2021-12-06 20:01:37,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-06 20:01:37,634 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:01:37,635 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:01:37,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 20:01:37,635 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:01:37,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:01:37,635 INFO L85 PathProgramCache]: Analyzing trace with hash 803082110, now seen corresponding path program 1 times [2021-12-06 20:01:37,635 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:01:37,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524729612] [2021-12-06 20:01:37,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:01:37,636 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:01:37,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:01:37,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 20:01:37,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:01:37,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-06 20:01:37,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:01:37,689 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 20:01:37,690 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:01:37,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524729612] [2021-12-06 20:01:37,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524729612] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:01:37,690 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:01:37,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 20:01:37,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067797201] [2021-12-06 20:01:37,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:01:37,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 20:01:37,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:01:37,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 20:01:37,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 20:01:37,691 INFO L87 Difference]: Start difference. First operand 575 states and 869 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 20:01:37,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:01:37,837 INFO L93 Difference]: Finished difference Result 983 states and 1428 transitions. [2021-12-06 20:01:37,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 20:01:37,838 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2021-12-06 20:01:37,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:01:37,844 INFO L225 Difference]: With dead ends: 983 [2021-12-06 20:01:37,844 INFO L226 Difference]: Without dead ends: 792 [2021-12-06 20:01:37,845 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 20:01:37,846 INFO L933 BasicCegarLoop]: 709 mSDtfsCounter, 953 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 979 SdHoareTripleChecker+Valid, 1124 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:01:37,847 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [979 Valid, 1124 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 20:01:37,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 792 states. [2021-12-06 20:01:37,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 792 to 740. [2021-12-06 20:01:37,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 666 states have (on average 1.466966966966967) internal successors, (977), 673 states have internal predecessors, (977), 50 states have call successors, (50), 21 states have call predecessors, (50), 22 states have return successors, (60), 46 states have call predecessors, (60), 48 states have call successors, (60) [2021-12-06 20:01:37,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 1087 transitions. [2021-12-06 20:01:37,896 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 1087 transitions. Word has length 45 [2021-12-06 20:01:37,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:01:37,896 INFO L470 AbstractCegarLoop]: Abstraction has 740 states and 1087 transitions. [2021-12-06 20:01:37,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 20:01:37,896 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 1087 transitions. [2021-12-06 20:01:37,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-06 20:01:37,900 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:01:37,900 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:01:37,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-06 20:01:37,901 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:01:37,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:01:37,901 INFO L85 PathProgramCache]: Analyzing trace with hash 1436949354, now seen corresponding path program 1 times [2021-12-06 20:01:37,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:01:37,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166337144] [2021-12-06 20:01:37,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:01:37,902 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:01:37,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:01:37,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 20:01:37,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:01:37,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-06 20:01:37,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:01:37,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-06 20:01:37,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:01:37,966 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 20:01:37,966 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:01:37,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166337144] [2021-12-06 20:01:37,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166337144] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:01:37,967 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:01:37,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 20:01:37,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525904548] [2021-12-06 20:01:37,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:01:37,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 20:01:37,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:01:37,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 20:01:37,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 20:01:37,969 INFO L87 Difference]: Start difference. First operand 740 states and 1087 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 20:01:38,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:01:38,291 INFO L93 Difference]: Finished difference Result 1324 states and 1872 transitions. [2021-12-06 20:01:38,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 20:01:38,292 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 62 [2021-12-06 20:01:38,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:01:38,299 INFO L225 Difference]: With dead ends: 1324 [2021-12-06 20:01:38,299 INFO L226 Difference]: Without dead ends: 968 [2021-12-06 20:01:38,300 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 20:01:38,302 INFO L933 BasicCegarLoop]: 758 mSDtfsCounter, 352 mSDsluCounter, 745 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 354 SdHoareTripleChecker+Valid, 1503 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 20:01:38,302 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [354 Valid, 1503 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 385 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 20:01:38,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 968 states. [2021-12-06 20:01:38,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 968 to 930. [2021-12-06 20:01:38,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 930 states, 832 states have (on average 1.4146634615384615) internal successors, (1177), 841 states have internal predecessors, (1177), 64 states have call successors, (64), 29 states have call predecessors, (64), 32 states have return successors, (84), 60 states have call predecessors, (84), 62 states have call successors, (84) [2021-12-06 20:01:38,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 930 states to 930 states and 1325 transitions. [2021-12-06 20:01:38,346 INFO L78 Accepts]: Start accepts. Automaton has 930 states and 1325 transitions. Word has length 62 [2021-12-06 20:01:38,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:01:38,347 INFO L470 AbstractCegarLoop]: Abstraction has 930 states and 1325 transitions. [2021-12-06 20:01:38,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 20:01:38,347 INFO L276 IsEmpty]: Start isEmpty. Operand 930 states and 1325 transitions. [2021-12-06 20:01:38,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-06 20:01:38,349 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:01:38,349 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:01:38,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-06 20:01:38,349 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:01:38,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:01:38,350 INFO L85 PathProgramCache]: Analyzing trace with hash -1474560009, now seen corresponding path program 1 times [2021-12-06 20:01:38,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:01:38,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604415914] [2021-12-06 20:01:38,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:01:38,350 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:01:38,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:01:38,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 20:01:38,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:01:38,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-06 20:01:38,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:01:38,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-06 20:01:38,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:01:38,398 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-06 20:01:38,398 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:01:38,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604415914] [2021-12-06 20:01:38,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604415914] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:01:38,399 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:01:38,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 20:01:38,399 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707334391] [2021-12-06 20:01:38,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:01:38,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 20:01:38,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:01:38,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 20:01:38,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 20:01:38,400 INFO L87 Difference]: Start difference. First operand 930 states and 1325 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-06 20:01:38,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:01:38,541 INFO L93 Difference]: Finished difference Result 1583 states and 2178 transitions. [2021-12-06 20:01:38,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 20:01:38,541 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 67 [2021-12-06 20:01:38,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:01:38,549 INFO L225 Difference]: With dead ends: 1583 [2021-12-06 20:01:38,549 INFO L226 Difference]: Without dead ends: 1129 [2021-12-06 20:01:38,551 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 20:01:38,552 INFO L933 BasicCegarLoop]: 704 mSDtfsCounter, 940 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 966 SdHoareTripleChecker+Valid, 1121 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:01:38,553 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [966 Valid, 1121 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 20:01:38,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1129 states. [2021-12-06 20:01:38,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1129 to 1074. [2021-12-06 20:01:38,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1074 states, 960 states have (on average 1.3833333333333333) internal successors, (1328), 971 states have internal predecessors, (1328), 72 states have call successors, (72), 35 states have call predecessors, (72), 40 states have return successors, (98), 68 states have call predecessors, (98), 70 states have call successors, (98) [2021-12-06 20:01:38,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1074 states to 1074 states and 1498 transitions. [2021-12-06 20:01:38,603 INFO L78 Accepts]: Start accepts. Automaton has 1074 states and 1498 transitions. Word has length 67 [2021-12-06 20:01:38,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:01:38,603 INFO L470 AbstractCegarLoop]: Abstraction has 1074 states and 1498 transitions. [2021-12-06 20:01:38,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-06 20:01:38,604 INFO L276 IsEmpty]: Start isEmpty. Operand 1074 states and 1498 transitions. [2021-12-06 20:01:38,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-06 20:01:38,605 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:01:38,606 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:01:38,606 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-06 20:01:38,606 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:01:38,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:01:38,606 INFO L85 PathProgramCache]: Analyzing trace with hash 132320028, now seen corresponding path program 1 times [2021-12-06 20:01:38,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:01:38,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744337142] [2021-12-06 20:01:38,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:01:38,607 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:01:38,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:01:38,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 20:01:38,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:01:38,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 20:01:38,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:01:38,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-06 20:01:38,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:01:38,680 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 20:01:38,680 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:01:38,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744337142] [2021-12-06 20:01:38,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744337142] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:01:38,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017404386] [2021-12-06 20:01:38,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:01:38,681 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:01:38,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a85781-0bdd-41e1-8f07-077010e9cfb7/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:01:38,682 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a85781-0bdd-41e1-8f07-077010e9cfb7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:01:38,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a85781-0bdd-41e1-8f07-077010e9cfb7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 20:01:38,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:01:38,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-06 20:01:38,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:01:38,877 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:01:38,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:01:38,942 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-06 20:01:38,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017404386] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-06 20:01:38,942 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-06 20:01:38,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 8 [2021-12-06 20:01:38,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427058612] [2021-12-06 20:01:38,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:01:38,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 20:01:38,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:01:38,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 20:01:38,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-06 20:01:38,944 INFO L87 Difference]: Start difference. First operand 1074 states and 1498 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 20:01:39,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:01:39,088 INFO L93 Difference]: Finished difference Result 1130 states and 1566 transitions. [2021-12-06 20:01:39,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 20:01:39,088 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 68 [2021-12-06 20:01:39,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:01:39,094 INFO L225 Difference]: With dead ends: 1130 [2021-12-06 20:01:39,094 INFO L226 Difference]: Without dead ends: 1127 [2021-12-06 20:01:39,094 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-06 20:01:39,095 INFO L933 BasicCegarLoop]: 713 mSDtfsCounter, 1259 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1259 SdHoareTripleChecker+Valid, 780 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:01:39,095 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1259 Valid, 780 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 20:01:39,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1127 states. [2021-12-06 20:01:39,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1127 to 1073. [2021-12-06 20:01:39,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1073 states, 960 states have (on average 1.38125) internal successors, (1326), 970 states have internal predecessors, (1326), 71 states have call successors, (71), 35 states have call predecessors, (71), 40 states have return successors, (98), 68 states have call predecessors, (98), 70 states have call successors, (98) [2021-12-06 20:01:39,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1073 states to 1073 states and 1495 transitions. [2021-12-06 20:01:39,146 INFO L78 Accepts]: Start accepts. Automaton has 1073 states and 1495 transitions. Word has length 68 [2021-12-06 20:01:39,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:01:39,146 INFO L470 AbstractCegarLoop]: Abstraction has 1073 states and 1495 transitions. [2021-12-06 20:01:39,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 20:01:39,147 INFO L276 IsEmpty]: Start isEmpty. Operand 1073 states and 1495 transitions. [2021-12-06 20:01:39,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-06 20:01:39,148 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:01:39,149 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:01:39,171 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a85781-0bdd-41e1-8f07-077010e9cfb7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 20:01:39,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a85781-0bdd-41e1-8f07-077010e9cfb7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:01:39,350 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:01:39,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:01:39,351 INFO L85 PathProgramCache]: Analyzing trace with hash -194439590, now seen corresponding path program 1 times [2021-12-06 20:01:39,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:01:39,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549812625] [2021-12-06 20:01:39,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:01:39,352 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:01:39,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:01:39,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 20:01:39,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:01:39,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 20:01:39,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:01:39,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-06 20:01:39,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:01:39,514 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 20:01:39,514 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:01:39,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549812625] [2021-12-06 20:01:39,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549812625] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:01:39,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118905305] [2021-12-06 20:01:39,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:01:39,515 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:01:39,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a85781-0bdd-41e1-8f07-077010e9cfb7/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:01:39,516 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a85781-0bdd-41e1-8f07-077010e9cfb7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:01:39,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a85781-0bdd-41e1-8f07-077010e9cfb7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 20:01:39,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:01:39,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-06 20:01:39,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:01:39,834 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:01:39,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:01:39,925 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-06 20:01:39,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118905305] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:01:39,925 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:01:39,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 4] total 11 [2021-12-06 20:01:39,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559485345] [2021-12-06 20:01:39,926 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:01:39,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-06 20:01:39,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:01:39,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-06 20:01:39,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-12-06 20:01:39,928 INFO L87 Difference]: Start difference. First operand 1073 states and 1495 transitions. Second operand has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 10 states have internal predecessors, (151), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2021-12-06 20:01:41,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:01:41,095 INFO L93 Difference]: Finished difference Result 2773 states and 3715 transitions. [2021-12-06 20:01:41,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-12-06 20:01:41,096 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 10 states have internal predecessors, (151), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 69 [2021-12-06 20:01:41,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:01:41,105 INFO L225 Difference]: With dead ends: 2773 [2021-12-06 20:01:41,106 INFO L226 Difference]: Without dead ends: 2229 [2021-12-06 20:01:41,108 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=324, Invalid=1482, Unknown=0, NotChecked=0, Total=1806 [2021-12-06 20:01:41,108 INFO L933 BasicCegarLoop]: 818 mSDtfsCounter, 1905 mSDsluCounter, 3006 mSDsCounter, 0 mSdLazyCounter, 1804 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1938 SdHoareTripleChecker+Valid, 3824 SdHoareTripleChecker+Invalid, 1911 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 1804 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 20:01:41,109 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1938 Valid, 3824 Invalid, 1911 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 1804 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-06 20:01:41,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2229 states. [2021-12-06 20:01:41,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2229 to 1462. [2021-12-06 20:01:41,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1462 states, 1310 states have (on average 1.3435114503816794) internal successors, (1760), 1328 states have internal predecessors, (1760), 91 states have call successors, (91), 49 states have call predecessors, (91), 59 states have return successors, (132), 85 states have call predecessors, (132), 90 states have call successors, (132) [2021-12-06 20:01:41,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1462 states to 1462 states and 1983 transitions. [2021-12-06 20:01:41,176 INFO L78 Accepts]: Start accepts. Automaton has 1462 states and 1983 transitions. Word has length 69 [2021-12-06 20:01:41,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:01:41,176 INFO L470 AbstractCegarLoop]: Abstraction has 1462 states and 1983 transitions. [2021-12-06 20:01:41,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 10 states have internal predecessors, (151), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2021-12-06 20:01:41,177 INFO L276 IsEmpty]: Start isEmpty. Operand 1462 states and 1983 transitions. [2021-12-06 20:01:41,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-12-06 20:01:41,179 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:01:41,180 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:01:41,213 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a85781-0bdd-41e1-8f07-077010e9cfb7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 20:01:41,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a85781-0bdd-41e1-8f07-077010e9cfb7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:01:41,380 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:01:41,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:01:41,381 INFO L85 PathProgramCache]: Analyzing trace with hash -939873926, now seen corresponding path program 1 times [2021-12-06 20:01:41,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:01:41,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189091954] [2021-12-06 20:01:41,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:01:41,381 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:01:41,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:01:41,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 20:01:41,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:01:41,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 20:01:41,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:01:41,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-06 20:01:41,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:01:41,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-06 20:01:41,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:01:41,460 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-12-06 20:01:41,460 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:01:41,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189091954] [2021-12-06 20:01:41,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189091954] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:01:41,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257670986] [2021-12-06 20:01:41,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:01:41,461 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:01:41,461 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a85781-0bdd-41e1-8f07-077010e9cfb7/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:01:41,462 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a85781-0bdd-41e1-8f07-077010e9cfb7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:01:41,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a85781-0bdd-41e1-8f07-077010e9cfb7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 20:01:41,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:01:41,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 20:01:41,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:01:41,612 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-06 20:01:41,612 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 20:01:41,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257670986] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:01:41,612 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 20:01:41,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-12-06 20:01:41,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976734705] [2021-12-06 20:01:41,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:01:41,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 20:01:41,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:01:41,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 20:01:41,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 20:01:41,614 INFO L87 Difference]: Start difference. First operand 1462 states and 1983 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-06 20:01:41,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:01:41,656 INFO L93 Difference]: Finished difference Result 2185 states and 2921 transitions. [2021-12-06 20:01:41,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 20:01:41,657 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 88 [2021-12-06 20:01:41,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:01:41,662 INFO L225 Difference]: With dead ends: 2185 [2021-12-06 20:01:41,662 INFO L226 Difference]: Without dead ends: 1340 [2021-12-06 20:01:41,664 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 20:01:41,665 INFO L933 BasicCegarLoop]: 719 mSDtfsCounter, 648 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 648 SdHoareTripleChecker+Valid, 794 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:01:41,665 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [648 Valid, 794 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:01:41,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1340 states. [2021-12-06 20:01:41,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1340 to 1325. [2021-12-06 20:01:41,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1325 states, 1189 states have (on average 1.3473507148864592) internal successors, (1602), 1206 states have internal predecessors, (1602), 83 states have call successors, (83), 43 states have call predecessors, (83), 51 states have return successors, (118), 76 states have call predecessors, (118), 82 states have call successors, (118) [2021-12-06 20:01:41,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1325 states to 1325 states and 1803 transitions. [2021-12-06 20:01:41,714 INFO L78 Accepts]: Start accepts. Automaton has 1325 states and 1803 transitions. Word has length 88 [2021-12-06 20:01:41,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:01:41,714 INFO L470 AbstractCegarLoop]: Abstraction has 1325 states and 1803 transitions. [2021-12-06 20:01:41,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-06 20:01:41,715 INFO L276 IsEmpty]: Start isEmpty. Operand 1325 states and 1803 transitions. [2021-12-06 20:01:41,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-06 20:01:41,717 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:01:41,717 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:01:41,741 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a85781-0bdd-41e1-8f07-077010e9cfb7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 20:01:41,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a85781-0bdd-41e1-8f07-077010e9cfb7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:01:41,918 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:01:41,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:01:41,918 INFO L85 PathProgramCache]: Analyzing trace with hash 1556491019, now seen corresponding path program 1 times [2021-12-06 20:01:41,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:01:41,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801979854] [2021-12-06 20:01:41,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:01:41,919 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:01:41,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:01:41,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 20:01:41,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:01:41,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 20:01:41,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:01:41,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-06 20:01:41,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:01:41,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-06 20:01:41,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:01:41,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-06 20:01:41,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:01:41,996 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-06 20:01:41,997 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:01:41,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801979854] [2021-12-06 20:01:41,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801979854] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:01:41,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695866358] [2021-12-06 20:01:41,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:01:41,998 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:01:41,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a85781-0bdd-41e1-8f07-077010e9cfb7/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:01:41,999 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a85781-0bdd-41e1-8f07-077010e9cfb7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:01:41,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a85781-0bdd-41e1-8f07-077010e9cfb7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 20:01:42,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:01:42,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-06 20:01:42,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:01:42,193 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-06 20:01:42,193 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 20:01:42,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695866358] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:01:42,193 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 20:01:42,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-12-06 20:01:42,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552654441] [2021-12-06 20:01:42,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:01:42,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 20:01:42,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:01:42,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 20:01:42,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 20:01:42,195 INFO L87 Difference]: Start difference. First operand 1325 states and 1803 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-06 20:01:42,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:01:42,235 INFO L93 Difference]: Finished difference Result 1704 states and 2271 transitions. [2021-12-06 20:01:42,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 20:01:42,235 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 103 [2021-12-06 20:01:42,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:01:42,238 INFO L225 Difference]: With dead ends: 1704 [2021-12-06 20:01:42,238 INFO L226 Difference]: Without dead ends: 378 [2021-12-06 20:01:42,240 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 20:01:42,240 INFO L933 BasicCegarLoop]: 733 mSDtfsCounter, 62 mSDsluCounter, 663 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 1396 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:01:42,241 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 1396 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:01:42,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-12-06 20:01:42,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 378. [2021-12-06 20:01:42,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 345 states have (on average 1.5768115942028986) internal successors, (544), 346 states have internal predecessors, (544), 26 states have call successors, (26), 6 states have call predecessors, (26), 6 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2021-12-06 20:01:42,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 596 transitions. [2021-12-06 20:01:42,253 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 596 transitions. Word has length 103 [2021-12-06 20:01:42,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:01:42,253 INFO L470 AbstractCegarLoop]: Abstraction has 378 states and 596 transitions. [2021-12-06 20:01:42,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-06 20:01:42,253 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 596 transitions. [2021-12-06 20:01:42,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-12-06 20:01:42,255 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:01:42,255 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] [2021-12-06 20:01:42,275 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a85781-0bdd-41e1-8f07-077010e9cfb7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-06 20:01:42,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a85781-0bdd-41e1-8f07-077010e9cfb7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:01:42,456 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:01:42,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:01:42,457 INFO L85 PathProgramCache]: Analyzing trace with hash -1582396628, now seen corresponding path program 1 times [2021-12-06 20:01:42,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:01:42,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318912907] [2021-12-06 20:01:42,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:01:42,458 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:01:42,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:01:42,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:01:42,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:01:42,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-06 20:01:42,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:01:42,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-06 20:01:42,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:01:42,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-06 20:01:42,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:01:42,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-06 20:01:42,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:01:42,697 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 20:01:42,697 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:01:42,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318912907] [2021-12-06 20:01:42,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318912907] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:01:42,698 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:01:42,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 20:01:42,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669760654] [2021-12-06 20:01:42,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:01:42,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 20:01:42,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:01:42,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 20:01:42,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 20:01:42,699 INFO L87 Difference]: Start difference. First operand 378 states and 596 transitions. Second operand has 5 states, 5 states have (on average 33.6) internal successors, (168), 3 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 20:01:43,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:01:43,752 INFO L93 Difference]: Finished difference Result 891 states and 1428 transitions. [2021-12-06 20:01:43,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 20:01:43,753 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 33.6) internal successors, (168), 3 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 178 [2021-12-06 20:01:43,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:01:43,755 INFO L225 Difference]: With dead ends: 891 [2021-12-06 20:01:43,755 INFO L226 Difference]: Without dead ends: 520 [2021-12-06 20:01:43,756 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-06 20:01:43,757 INFO L933 BasicCegarLoop]: 657 mSDtfsCounter, 1030 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 703 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1054 SdHoareTripleChecker+Valid, 1069 SdHoareTripleChecker+Invalid, 763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-06 20:01:43,757 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1054 Valid, 1069 Invalid, 763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 703 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-06 20:01:43,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2021-12-06 20:01:43,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 378. [2021-12-06 20:01:43,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 345 states have (on average 1.5739130434782609) internal successors, (543), 346 states have internal predecessors, (543), 26 states have call successors, (26), 6 states have call predecessors, (26), 6 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2021-12-06 20:01:43,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 595 transitions. [2021-12-06 20:01:43,776 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 595 transitions. Word has length 178 [2021-12-06 20:01:43,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:01:43,776 INFO L470 AbstractCegarLoop]: Abstraction has 378 states and 595 transitions. [2021-12-06 20:01:43,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.6) internal successors, (168), 3 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 20:01:43,777 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 595 transitions. [2021-12-06 20:01:43,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-12-06 20:01:43,778 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:01:43,778 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] [2021-12-06 20:01:43,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-06 20:01:43,778 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:01:43,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:01:43,779 INFO L85 PathProgramCache]: Analyzing trace with hash -79298322, now seen corresponding path program 1 times [2021-12-06 20:01:43,779 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:01:43,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415627412] [2021-12-06 20:01:43,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:01:43,779 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:01:43,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:01:43,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:01:43,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:01:43,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-06 20:01:43,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:01:43,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-06 20:01:43,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:01:43,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-06 20:01:43,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:01:43,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-06 20:01:43,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:01:43,896 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 20:01:43,896 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:01:43,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415627412] [2021-12-06 20:01:43,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415627412] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:01:43,897 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:01:43,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 20:01:43,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400365575] [2021-12-06 20:01:43,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:01:43,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 20:01:43,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:01:43,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 20:01:43,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 20:01:43,898 INFO L87 Difference]: Start difference. First operand 378 states and 595 transitions. Second operand has 5 states, 5 states have (on average 33.6) internal successors, (168), 3 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 20:01:44,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:01:44,899 INFO L93 Difference]: Finished difference Result 883 states and 1411 transitions. [2021-12-06 20:01:44,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 20:01:44,900 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 33.6) internal successors, (168), 3 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 178 [2021-12-06 20:01:44,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:01:44,902 INFO L225 Difference]: With dead ends: 883 [2021-12-06 20:01:44,902 INFO L226 Difference]: Without dead ends: 520 [2021-12-06 20:01:44,903 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-06 20:01:44,904 INFO L933 BasicCegarLoop]: 656 mSDtfsCounter, 1021 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 702 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1045 SdHoareTripleChecker+Valid, 1067 SdHoareTripleChecker+Invalid, 762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-06 20:01:44,904 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1045 Valid, 1067 Invalid, 762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 702 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-06 20:01:44,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2021-12-06 20:01:44,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 378. [2021-12-06 20:01:44,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 345 states have (on average 1.5710144927536231) internal successors, (542), 346 states have internal predecessors, (542), 26 states have call successors, (26), 6 states have call predecessors, (26), 6 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2021-12-06 20:01:44,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 594 transitions. [2021-12-06 20:01:44,925 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 594 transitions. Word has length 178 [2021-12-06 20:01:44,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:01:44,925 INFO L470 AbstractCegarLoop]: Abstraction has 378 states and 594 transitions. [2021-12-06 20:01:44,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.6) internal successors, (168), 3 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 20:01:44,926 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 594 transitions. [2021-12-06 20:01:44,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-12-06 20:01:44,928 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:01:44,928 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] [2021-12-06 20:01:44,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-06 20:01:44,928 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:01:44,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:01:44,929 INFO L85 PathProgramCache]: Analyzing trace with hash -649570128, now seen corresponding path program 1 times [2021-12-06 20:01:44,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:01:44,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246073200] [2021-12-06 20:01:44,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:01:44,929 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:01:44,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:01:44,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:01:44,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:01:44,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-06 20:01:44,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:01:45,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-06 20:01:45,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:01:45,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-06 20:01:45,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:01:45,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-06 20:01:45,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:01:45,055 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 20:01:45,055 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:01:45,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246073200] [2021-12-06 20:01:45,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246073200] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:01:45,055 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:01:45,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 20:01:45,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525918648] [2021-12-06 20:01:45,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:01:45,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 20:01:45,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:01:45,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 20:01:45,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-06 20:01:45,057 INFO L87 Difference]: Start difference. First operand 378 states and 594 transitions. Second operand has 6 states, 6 states have (on average 28.0) internal successors, (168), 4 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 20:01:47,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:01:47,183 INFO L93 Difference]: Finished difference Result 1394 states and 2241 transitions. [2021-12-06 20:01:47,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 20:01:47,183 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 28.0) internal successors, (168), 4 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 178 [2021-12-06 20:01:47,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:01:47,187 INFO L225 Difference]: With dead ends: 1394 [2021-12-06 20:01:47,187 INFO L226 Difference]: Without dead ends: 1037 [2021-12-06 20:01:47,188 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 20:01:47,188 INFO L933 BasicCegarLoop]: 759 mSDtfsCounter, 1552 mSDsluCounter, 1110 mSDsCounter, 0 mSdLazyCounter, 2002 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1571 SdHoareTripleChecker+Valid, 1869 SdHoareTripleChecker+Invalid, 2118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 2002 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-06 20:01:47,189 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1571 Valid, 1869 Invalid, 2118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 2002 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-06 20:01:47,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1037 states. [2021-12-06 20:01:47,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1037 to 754. [2021-12-06 20:01:47,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 754 states, 693 states have (on average 1.5844155844155845) internal successors, (1098), 695 states have internal predecessors, (1098), 47 states have call successors, (47), 12 states have call predecessors, (47), 13 states have return successors, (50), 47 states have call predecessors, (50), 47 states have call successors, (50) [2021-12-06 20:01:47,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 1195 transitions. [2021-12-06 20:01:47,229 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 1195 transitions. Word has length 178 [2021-12-06 20:01:47,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:01:47,229 INFO L470 AbstractCegarLoop]: Abstraction has 754 states and 1195 transitions. [2021-12-06 20:01:47,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 28.0) internal successors, (168), 4 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 20:01:47,229 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 1195 transitions. [2021-12-06 20:01:47,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-12-06 20:01:47,231 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:01:47,231 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] [2021-12-06 20:01:47,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-06 20:01:47,231 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:01:47,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:01:47,231 INFO L85 PathProgramCache]: Analyzing trace with hash -1525555404, now seen corresponding path program 1 times [2021-12-06 20:01:47,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:01:47,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387384943] [2021-12-06 20:01:47,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:01:47,232 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:01:47,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:01:47,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:01:47,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:01:47,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-06 20:01:47,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:01:47,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-06 20:01:47,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:01:47,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-06 20:01:47,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:01:47,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-06 20:01:47,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:01:47,355 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 20:01:47,355 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:01:47,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387384943] [2021-12-06 20:01:47,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387384943] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:01:47,355 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:01:47,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 20:01:47,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490181503] [2021-12-06 20:01:47,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:01:47,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 20:01:47,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:01:47,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 20:01:47,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 20:01:47,356 INFO L87 Difference]: Start difference. First operand 754 states and 1195 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 20:01:49,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:01:49,889 INFO L93 Difference]: Finished difference Result 2307 states and 3715 transitions. [2021-12-06 20:01:49,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 20:01:49,889 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 178 [2021-12-06 20:01:49,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:01:49,895 INFO L225 Difference]: With dead ends: 2307 [2021-12-06 20:01:49,895 INFO L226 Difference]: Without dead ends: 1574 [2021-12-06 20:01:49,896 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 20:01:49,897 INFO L933 BasicCegarLoop]: 1007 mSDtfsCounter, 1586 mSDsluCounter, 1940 mSDsCounter, 0 mSdLazyCounter, 3059 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1605 SdHoareTripleChecker+Valid, 2947 SdHoareTripleChecker+Invalid, 3139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 3059 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:01:49,897 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1605 Valid, 2947 Invalid, 3139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 3059 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-06 20:01:49,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1574 states. [2021-12-06 20:01:49,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1574 to 1103. [2021-12-06 20:01:49,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1103 states, 1014 states have (on average 1.5779092702169626) internal successors, (1600), 1017 states have internal predecessors, (1600), 68 states have call successors, (68), 18 states have call predecessors, (68), 20 states have return successors, (73), 69 states have call predecessors, (73), 68 states have call successors, (73) [2021-12-06 20:01:49,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1103 states to 1103 states and 1741 transitions. [2021-12-06 20:01:49,966 INFO L78 Accepts]: Start accepts. Automaton has 1103 states and 1741 transitions. Word has length 178 [2021-12-06 20:01:49,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:01:49,966 INFO L470 AbstractCegarLoop]: Abstraction has 1103 states and 1741 transitions. [2021-12-06 20:01:49,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 20:01:49,967 INFO L276 IsEmpty]: Start isEmpty. Operand 1103 states and 1741 transitions. [2021-12-06 20:01:49,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-12-06 20:01:49,968 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:01:49,968 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] [2021-12-06 20:01:49,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-06 20:01:49,968 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:01:49,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:01:49,969 INFO L85 PathProgramCache]: Analyzing trace with hash -2136824462, now seen corresponding path program 1 times [2021-12-06 20:01:49,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:01:49,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781896984] [2021-12-06 20:01:49,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:01:49,969 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:01:49,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:01:49,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:01:49,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:01:50,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-06 20:01:50,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:01:50,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-06 20:01:50,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:01:50,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-06 20:01:50,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:01:50,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-06 20:01:50,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:01:50,081 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 20:01:50,081 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:01:50,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781896984] [2021-12-06 20:01:50,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781896984] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:01:50,081 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:01:50,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 20:01:50,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628467199] [2021-12-06 20:01:50,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:01:50,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 20:01:50,082 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:01:50,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 20:01:50,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-06 20:01:50,082 INFO L87 Difference]: Start difference. First operand 1103 states and 1741 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 20:01:51,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:01:51,383 INFO L93 Difference]: Finished difference Result 2674 states and 4303 transitions. [2021-12-06 20:01:51,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 20:01:51,383 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 178 [2021-12-06 20:01:51,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:01:51,389 INFO L225 Difference]: With dead ends: 2674 [2021-12-06 20:01:51,389 INFO L226 Difference]: Without dead ends: 1592 [2021-12-06 20:01:51,391 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 20:01:51,392 INFO L933 BasicCegarLoop]: 644 mSDtfsCounter, 1118 mSDsluCounter, 933 mSDsCounter, 0 mSdLazyCounter, 1502 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1138 SdHoareTripleChecker+Valid, 1577 SdHoareTripleChecker+Invalid, 1587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:01:51,392 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1138 Valid, 1577 Invalid, 1587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1502 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-06 20:01:51,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1592 states. [2021-12-06 20:01:51,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1592 to 1103. [2021-12-06 20:01:51,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1103 states, 1014 states have (on average 1.5749506903353057) internal successors, (1597), 1017 states have internal predecessors, (1597), 68 states have call successors, (68), 18 states have call predecessors, (68), 20 states have return successors, (73), 69 states have call predecessors, (73), 68 states have call successors, (73) [2021-12-06 20:01:51,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1103 states to 1103 states and 1738 transitions. [2021-12-06 20:01:51,462 INFO L78 Accepts]: Start accepts. Automaton has 1103 states and 1738 transitions. Word has length 178 [2021-12-06 20:01:51,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:01:51,462 INFO L470 AbstractCegarLoop]: Abstraction has 1103 states and 1738 transitions. [2021-12-06 20:01:51,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 20:01:51,463 INFO L276 IsEmpty]: Start isEmpty. Operand 1103 states and 1738 transitions. [2021-12-06 20:01:51,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-12-06 20:01:51,464 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:01:51,464 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] [2021-12-06 20:01:51,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-06 20:01:51,464 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:01:51,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:01:51,465 INFO L85 PathProgramCache]: Analyzing trace with hash -242490576, now seen corresponding path program 1 times [2021-12-06 20:01:51,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:01:51,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217265271] [2021-12-06 20:01:51,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:01:51,465 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:01:51,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:01:51,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:01:51,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:01:51,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-06 20:01:51,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:01:51,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-06 20:01:51,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:01:51,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-06 20:01:51,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:01:51,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-06 20:01:51,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:01:51,584 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 20:01:51,584 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:01:51,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217265271] [2021-12-06 20:01:51,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217265271] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:01:51,585 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:01:51,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 20:01:51,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194497086] [2021-12-06 20:01:51,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:01:51,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 20:01:51,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:01:51,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 20:01:51,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-06 20:01:51,586 INFO L87 Difference]: Start difference. First operand 1103 states and 1738 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 20:01:52,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:01:52,734 INFO L93 Difference]: Finished difference Result 2670 states and 4286 transitions. [2021-12-06 20:01:52,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 20:01:52,735 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 178 [2021-12-06 20:01:52,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:01:52,741 INFO L225 Difference]: With dead ends: 2670 [2021-12-06 20:01:52,741 INFO L226 Difference]: Without dead ends: 1588 [2021-12-06 20:01:52,743 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 20:01:52,743 INFO L933 BasicCegarLoop]: 640 mSDtfsCounter, 1282 mSDsluCounter, 739 mSDsCounter, 0 mSdLazyCounter, 1320 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1302 SdHoareTripleChecker+Valid, 1379 SdHoareTripleChecker+Invalid, 1431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 1320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-06 20:01:52,743 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1302 Valid, 1379 Invalid, 1431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 1320 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-06 20:01:52,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1588 states. [2021-12-06 20:01:52,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1588 to 1103. [2021-12-06 20:01:52,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1103 states, 1014 states have (on average 1.571992110453649) internal successors, (1594), 1017 states have internal predecessors, (1594), 68 states have call successors, (68), 18 states have call predecessors, (68), 20 states have return successors, (73), 69 states have call predecessors, (73), 68 states have call successors, (73) [2021-12-06 20:01:52,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1103 states to 1103 states and 1735 transitions. [2021-12-06 20:01:52,817 INFO L78 Accepts]: Start accepts. Automaton has 1103 states and 1735 transitions. Word has length 178 [2021-12-06 20:01:52,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:01:52,817 INFO L470 AbstractCegarLoop]: Abstraction has 1103 states and 1735 transitions. [2021-12-06 20:01:52,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 20:01:52,817 INFO L276 IsEmpty]: Start isEmpty. Operand 1103 states and 1735 transitions. [2021-12-06 20:01:52,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-12-06 20:01:52,818 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:01:52,819 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] [2021-12-06 20:01:52,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-06 20:01:52,819 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:01:52,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:01:52,819 INFO L85 PathProgramCache]: Analyzing trace with hash 1204090290, now seen corresponding path program 1 times [2021-12-06 20:01:52,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:01:52,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113953371] [2021-12-06 20:01:52,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:01:52,819 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:01:52,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:01:52,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:01:52,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:01:52,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-06 20:01:52,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:01:52,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-06 20:01:52,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:01:52,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-06 20:01:52,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:01:52,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-06 20:01:52,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:01:52,931 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 20:01:52,931 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:01:52,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113953371] [2021-12-06 20:01:52,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113953371] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:01:52,931 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:01:52,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 20:01:52,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198039294] [2021-12-06 20:01:52,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:01:52,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 20:01:52,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:01:52,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 20:01:52,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 20:01:52,933 INFO L87 Difference]: Start difference. First operand 1103 states and 1735 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 20:01:55,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:01:55,343 INFO L93 Difference]: Finished difference Result 3644 states and 5825 transitions. [2021-12-06 20:01:55,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 20:01:55,344 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 178 [2021-12-06 20:01:55,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:01:55,357 INFO L225 Difference]: With dead ends: 3644 [2021-12-06 20:01:55,357 INFO L226 Difference]: Without dead ends: 2562 [2021-12-06 20:01:55,361 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 20:01:55,362 INFO L933 BasicCegarLoop]: 740 mSDtfsCounter, 1670 mSDsluCounter, 1295 mSDsCounter, 0 mSdLazyCounter, 2685 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1689 SdHoareTripleChecker+Valid, 2035 SdHoareTripleChecker+Invalid, 2803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 2685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-06 20:01:55,362 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1689 Valid, 2035 Invalid, 2803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 2685 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-06 20:01:55,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2562 states. [2021-12-06 20:01:55,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2562 to 1811. [2021-12-06 20:01:55,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1811 states, 1666 states have (on average 1.5660264105642256) internal successors, (2609), 1671 states have internal predecessors, (2609), 110 states have call successors, (110), 30 states have call predecessors, (110), 34 states have return successors, (123), 113 states have call predecessors, (123), 110 states have call successors, (123) [2021-12-06 20:01:55,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1811 states to 1811 states and 2842 transitions. [2021-12-06 20:01:55,501 INFO L78 Accepts]: Start accepts. Automaton has 1811 states and 2842 transitions. Word has length 178 [2021-12-06 20:01:55,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:01:55,501 INFO L470 AbstractCegarLoop]: Abstraction has 1811 states and 2842 transitions. [2021-12-06 20:01:55,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 20:01:55,502 INFO L276 IsEmpty]: Start isEmpty. Operand 1811 states and 2842 transitions. [2021-12-06 20:01:55,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-12-06 20:01:55,504 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:01:55,504 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] [2021-12-06 20:01:55,504 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-06 20:01:55,504 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:01:55,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:01:55,505 INFO L85 PathProgramCache]: Analyzing trace with hash 280922864, now seen corresponding path program 1 times [2021-12-06 20:01:55,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:01:55,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479433691] [2021-12-06 20:01:55,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:01:55,505 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:01:55,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:01:55,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:01:55,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:01:55,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-06 20:01:55,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:01:55,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-06 20:01:55,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:01:55,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-06 20:01:55,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:01:55,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-06 20:01:55,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:01:55,619 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 20:01:55,619 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:01:55,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479433691] [2021-12-06 20:01:55,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479433691] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:01:55,620 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:01:55,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 20:01:55,620 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927116886] [2021-12-06 20:01:55,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:01:55,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 20:01:55,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:01:55,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 20:01:55,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-06 20:01:55,621 INFO L87 Difference]: Start difference. First operand 1811 states and 2842 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 20:01:57,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:01:57,024 INFO L93 Difference]: Finished difference Result 4340 states and 6921 transitions. [2021-12-06 20:01:57,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 20:01:57,025 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 178 [2021-12-06 20:01:57,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:01:57,034 INFO L225 Difference]: With dead ends: 4340 [2021-12-06 20:01:57,034 INFO L226 Difference]: Without dead ends: 2550 [2021-12-06 20:01:57,038 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-06 20:01:57,038 INFO L933 BasicCegarLoop]: 633 mSDtfsCounter, 1115 mSDsluCounter, 933 mSDsCounter, 0 mSdLazyCounter, 1471 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1135 SdHoareTripleChecker+Valid, 1566 SdHoareTripleChecker+Invalid, 1556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:01:57,038 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1135 Valid, 1566 Invalid, 1556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1471 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-06 20:01:57,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2550 states. [2021-12-06 20:01:57,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2550 to 1811. [2021-12-06 20:01:57,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1811 states, 1666 states have (on average 1.5630252100840336) internal successors, (2604), 1671 states have internal predecessors, (2604), 110 states have call successors, (110), 30 states have call predecessors, (110), 34 states have return successors, (123), 113 states have call predecessors, (123), 110 states have call successors, (123) [2021-12-06 20:01:57,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1811 states to 1811 states and 2837 transitions. [2021-12-06 20:01:57,166 INFO L78 Accepts]: Start accepts. Automaton has 1811 states and 2837 transitions. Word has length 178 [2021-12-06 20:01:57,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:01:57,166 INFO L470 AbstractCegarLoop]: Abstraction has 1811 states and 2837 transitions. [2021-12-06 20:01:57,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 20:01:57,166 INFO L276 IsEmpty]: Start isEmpty. Operand 1811 states and 2837 transitions. [2021-12-06 20:01:57,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-12-06 20:01:57,168 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:01:57,168 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] [2021-12-06 20:01:57,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-06 20:01:57,168 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:01:57,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:01:57,168 INFO L85 PathProgramCache]: Analyzing trace with hash 666785266, now seen corresponding path program 1 times [2021-12-06 20:01:57,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:01:57,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237315122] [2021-12-06 20:01:57,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:01:57,169 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:01:57,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:01:57,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:01:57,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:01:57,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-06 20:01:57,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:01:57,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-06 20:01:57,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:01:57,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-06 20:01:57,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:01:57,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-06 20:01:57,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:01:57,288 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 20:01:57,288 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:01:57,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237315122] [2021-12-06 20:01:57,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237315122] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:01:57,288 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:01:57,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 20:01:57,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970358921] [2021-12-06 20:01:57,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:01:57,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 20:01:57,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:01:57,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 20:01:57,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 20:01:57,290 INFO L87 Difference]: Start difference. First operand 1811 states and 2837 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 20:02:00,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:02:00,064 INFO L93 Difference]: Finished difference Result 6232 states and 9892 transitions. [2021-12-06 20:02:00,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 20:02:00,064 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 178 [2021-12-06 20:02:00,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:02:00,083 INFO L225 Difference]: With dead ends: 6232 [2021-12-06 20:02:00,083 INFO L226 Difference]: Without dead ends: 4442 [2021-12-06 20:02:00,086 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 20:02:00,087 INFO L933 BasicCegarLoop]: 972 mSDtfsCounter, 1558 mSDsluCounter, 1936 mSDsCounter, 0 mSdLazyCounter, 2987 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1577 SdHoareTripleChecker+Valid, 2908 SdHoareTripleChecker+Invalid, 3069 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 2987 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:02:00,087 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1577 Valid, 2908 Invalid, 3069 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 2987 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-06 20:02:00,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4442 states. [2021-12-06 20:02:00,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4442 to 3229. [2021-12-06 20:02:00,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3229 states, 2972 states have (on average 1.557200538358008) internal successors, (4628), 2981 states have internal predecessors, (4628), 194 states have call successors, (194), 54 states have call predecessors, (194), 62 states have return successors, (229), 201 states have call predecessors, (229), 194 states have call successors, (229) [2021-12-06 20:02:00,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3229 states to 3229 states and 5051 transitions. [2021-12-06 20:02:00,319 INFO L78 Accepts]: Start accepts. Automaton has 3229 states and 5051 transitions. Word has length 178 [2021-12-06 20:02:00,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:02:00,319 INFO L470 AbstractCegarLoop]: Abstraction has 3229 states and 5051 transitions. [2021-12-06 20:02:00,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 20:02:00,319 INFO L276 IsEmpty]: Start isEmpty. Operand 3229 states and 5051 transitions. [2021-12-06 20:02:00,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-12-06 20:02:00,321 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:02:00,321 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] [2021-12-06 20:02:00,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-06 20:02:00,321 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:02:00,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:02:00,322 INFO L85 PathProgramCache]: Analyzing trace with hash 402137776, now seen corresponding path program 1 times [2021-12-06 20:02:00,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:02:00,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353841081] [2021-12-06 20:02:00,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:02:00,322 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:02:00,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:02:00,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:02:00,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:02:00,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-06 20:02:00,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:02:00,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-06 20:02:00,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:02:00,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-06 20:02:00,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:02:00,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-06 20:02:00,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:02:00,413 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 20:02:00,413 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:02:00,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353841081] [2021-12-06 20:02:00,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353841081] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:02:00,413 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:02:00,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 20:02:00,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041641988] [2021-12-06 20:02:00,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:02:00,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 20:02:00,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:02:00,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 20:02:00,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-06 20:02:00,415 INFO L87 Difference]: Start difference. First operand 3229 states and 5051 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 20:02:01,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:02:01,759 INFO L93 Difference]: Finished difference Result 7672 states and 12176 transitions. [2021-12-06 20:02:01,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 20:02:01,760 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 178 [2021-12-06 20:02:01,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:02:01,772 INFO L225 Difference]: With dead ends: 7672 [2021-12-06 20:02:01,772 INFO L226 Difference]: Without dead ends: 4464 [2021-12-06 20:02:01,779 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 20:02:01,779 INFO L933 BasicCegarLoop]: 626 mSDtfsCounter, 1280 mSDsluCounter, 739 mSDsCounter, 0 mSdLazyCounter, 1290 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1300 SdHoareTripleChecker+Valid, 1365 SdHoareTripleChecker+Invalid, 1401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 1290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-06 20:02:01,780 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1300 Valid, 1365 Invalid, 1401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 1290 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-06 20:02:01,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4464 states. [2021-12-06 20:02:02,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4464 to 3229. [2021-12-06 20:02:02,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3229 states, 2972 states have (on average 1.554172274562584) internal successors, (4619), 2981 states have internal predecessors, (4619), 194 states have call successors, (194), 54 states have call predecessors, (194), 62 states have return successors, (229), 201 states have call predecessors, (229), 194 states have call successors, (229) [2021-12-06 20:02:02,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3229 states to 3229 states and 5042 transitions. [2021-12-06 20:02:02,024 INFO L78 Accepts]: Start accepts. Automaton has 3229 states and 5042 transitions. Word has length 178 [2021-12-06 20:02:02,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:02:02,024 INFO L470 AbstractCegarLoop]: Abstraction has 3229 states and 5042 transitions. [2021-12-06 20:02:02,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 20:02:02,024 INFO L276 IsEmpty]: Start isEmpty. Operand 3229 states and 5042 transitions. [2021-12-06 20:02:02,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-12-06 20:02:02,026 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:02:02,026 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] [2021-12-06 20:02:02,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-06 20:02:02,026 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:02:02,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:02:02,026 INFO L85 PathProgramCache]: Analyzing trace with hash -1961703886, now seen corresponding path program 1 times [2021-12-06 20:02:02,026 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:02:02,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262158604] [2021-12-06 20:02:02,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:02:02,027 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:02:02,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:02:02,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:02:02,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:02:02,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-06 20:02:02,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:02:02,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-06 20:02:02,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:02:02,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-06 20:02:02,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:02:02,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-06 20:02:02,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:02:02,126 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 20:02:02,126 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:02:02,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262158604] [2021-12-06 20:02:02,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262158604] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:02:02,127 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:02:02,127 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 20:02:02,127 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295010873] [2021-12-06 20:02:02,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:02:02,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 20:02:02,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:02:02,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 20:02:02,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 20:02:02,128 INFO L87 Difference]: Start difference. First operand 3229 states and 5042 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 20:02:05,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:02:05,120 INFO L93 Difference]: Finished difference Result 11406 states and 18020 transitions. [2021-12-06 20:02:05,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 20:02:05,121 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 178 [2021-12-06 20:02:05,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:02:05,140 INFO L225 Difference]: With dead ends: 11406 [2021-12-06 20:02:05,140 INFO L226 Difference]: Without dead ends: 8198 [2021-12-06 20:02:05,146 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 20:02:05,147 INFO L933 BasicCegarLoop]: 959 mSDtfsCounter, 1553 mSDsluCounter, 1936 mSDsCounter, 0 mSdLazyCounter, 2957 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1572 SdHoareTripleChecker+Valid, 2895 SdHoareTripleChecker+Invalid, 3042 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 2957 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:02:05,147 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1572 Valid, 2895 Invalid, 3042 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 2957 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-06 20:02:05,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8198 states. [2021-12-06 20:02:05,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8198 to 6079. [2021-12-06 20:02:05,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6079 states, 5598 states have (on average 1.549660593068953) internal successors, (8675), 5615 states have internal predecessors, (8675), 362 states have call successors, (362), 102 states have call predecessors, (362), 118 states have return successors, (459), 377 states have call predecessors, (459), 362 states have call successors, (459) [2021-12-06 20:02:05,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6079 states to 6079 states and 9496 transitions. [2021-12-06 20:02:05,626 INFO L78 Accepts]: Start accepts. Automaton has 6079 states and 9496 transitions. Word has length 178 [2021-12-06 20:02:05,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:02:05,626 INFO L470 AbstractCegarLoop]: Abstraction has 6079 states and 9496 transitions. [2021-12-06 20:02:05,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 20:02:05,627 INFO L276 IsEmpty]: Start isEmpty. Operand 6079 states and 9496 transitions. [2021-12-06 20:02:05,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-12-06 20:02:05,629 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:02:05,629 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] [2021-12-06 20:02:05,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-06 20:02:05,629 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:02:05,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:02:05,630 INFO L85 PathProgramCache]: Analyzing trace with hash 1010084464, now seen corresponding path program 1 times [2021-12-06 20:02:05,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:02:05,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057470017] [2021-12-06 20:02:05,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:02:05,630 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:02:05,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:02:05,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:02:05,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:02:05,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-06 20:02:05,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:02:05,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-06 20:02:05,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:02:05,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-06 20:02:05,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:02:05,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-06 20:02:05,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:02:05,740 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 20:02:05,740 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:02:05,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057470017] [2021-12-06 20:02:05,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057470017] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:02:05,740 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:02:05,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 20:02:05,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850725726] [2021-12-06 20:02:05,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:02:05,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 20:02:05,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:02:05,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 20:02:05,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-06 20:02:05,742 INFO L87 Difference]: Start difference. First operand 6079 states and 9496 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 20:02:07,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:02:07,665 INFO L93 Difference]: Finished difference Result 14318 states and 22667 transitions. [2021-12-06 20:02:07,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 20:02:07,666 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 178 [2021-12-06 20:02:07,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:02:07,683 INFO L225 Difference]: With dead ends: 14318 [2021-12-06 20:02:07,683 INFO L226 Difference]: Without dead ends: 8260 [2021-12-06 20:02:07,695 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 20:02:07,695 INFO L933 BasicCegarLoop]: 615 mSDtfsCounter, 1114 mSDsluCounter, 933 mSDsCounter, 0 mSdLazyCounter, 1424 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1134 SdHoareTripleChecker+Valid, 1548 SdHoareTripleChecker+Invalid, 1512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 1424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:02:07,695 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1134 Valid, 1548 Invalid, 1512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 1424 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-06 20:02:07,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8260 states. [2021-12-06 20:02:08,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8260 to 6079. [2021-12-06 20:02:08,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6079 states, 5598 states have (on average 1.5466237942122187) internal successors, (8658), 5615 states have internal predecessors, (8658), 362 states have call successors, (362), 102 states have call predecessors, (362), 118 states have return successors, (459), 377 states have call predecessors, (459), 362 states have call successors, (459) [2021-12-06 20:02:08,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6079 states to 6079 states and 9479 transitions. [2021-12-06 20:02:08,169 INFO L78 Accepts]: Start accepts. Automaton has 6079 states and 9479 transitions. Word has length 178 [2021-12-06 20:02:08,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:02:08,170 INFO L470 AbstractCegarLoop]: Abstraction has 6079 states and 9479 transitions. [2021-12-06 20:02:08,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 20:02:08,170 INFO L276 IsEmpty]: Start isEmpty. Operand 6079 states and 9479 transitions. [2021-12-06 20:02:08,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-12-06 20:02:08,172 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:02:08,172 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] [2021-12-06 20:02:08,173 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-06 20:02:08,173 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:02:08,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:02:08,173 INFO L85 PathProgramCache]: Analyzing trace with hash 1348372014, now seen corresponding path program 1 times [2021-12-06 20:02:08,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:02:08,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172769840] [2021-12-06 20:02:08,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:02:08,174 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:02:08,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:02:08,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:02:08,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:02:08,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-06 20:02:08,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:02:08,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-06 20:02:08,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:02:08,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-06 20:02:08,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:02:08,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-06 20:02:08,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:02:08,275 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 20:02:08,275 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:02:08,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172769840] [2021-12-06 20:02:08,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172769840] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:02:08,276 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:02:08,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 20:02:08,276 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791901605] [2021-12-06 20:02:08,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:02:08,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 20:02:08,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:02:08,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 20:02:08,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 20:02:08,277 INFO L87 Difference]: Start difference. First operand 6079 states and 9479 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 20:02:12,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:02:12,003 INFO L93 Difference]: Finished difference Result 21738 states and 34260 transitions. [2021-12-06 20:02:12,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 20:02:12,003 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 178 [2021-12-06 20:02:12,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:02:12,052 INFO L225 Difference]: With dead ends: 21738 [2021-12-06 20:02:12,052 INFO L226 Difference]: Without dead ends: 15680 [2021-12-06 20:02:12,071 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 20:02:12,072 INFO L933 BasicCegarLoop]: 944 mSDtfsCounter, 1541 mSDsluCounter, 1936 mSDsCounter, 0 mSdLazyCounter, 2920 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1560 SdHoareTripleChecker+Valid, 2880 SdHoareTripleChecker+Invalid, 3005 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 2920 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:02:12,072 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1560 Valid, 2880 Invalid, 3005 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 2920 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-06 20:02:12,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15680 states. [2021-12-06 20:02:13,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15680 to 11826. [2021-12-06 20:02:13,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11826 states, 10897 states have (on average 1.5439111682114344) internal successors, (16824), 10930 states have internal predecessors, (16824), 698 states have call successors, (698), 198 states have call predecessors, (698), 230 states have return successors, (973), 729 states have call predecessors, (973), 698 states have call successors, (973) [2021-12-06 20:02:13,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11826 states to 11826 states and 18495 transitions. [2021-12-06 20:02:13,104 INFO L78 Accepts]: Start accepts. Automaton has 11826 states and 18495 transitions. Word has length 178 [2021-12-06 20:02:13,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:02:13,104 INFO L470 AbstractCegarLoop]: Abstraction has 11826 states and 18495 transitions. [2021-12-06 20:02:13,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 20:02:13,104 INFO L276 IsEmpty]: Start isEmpty. Operand 11826 states and 18495 transitions. [2021-12-06 20:02:13,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-12-06 20:02:13,108 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:02:13,108 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] [2021-12-06 20:02:13,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-06 20:02:13,109 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:02:13,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:02:13,109 INFO L85 PathProgramCache]: Analyzing trace with hash 1774926512, now seen corresponding path program 1 times [2021-12-06 20:02:13,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:02:13,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135803182] [2021-12-06 20:02:13,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:02:13,109 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:02:13,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:02:13,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:02:13,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:02:13,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-06 20:02:13,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:02:13,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-06 20:02:13,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:02:13,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-06 20:02:13,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:02:13,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-06 20:02:13,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:02:13,203 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 20:02:13,203 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:02:13,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135803182] [2021-12-06 20:02:13,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135803182] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:02:13,204 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:02:13,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 20:02:13,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333422673] [2021-12-06 20:02:13,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:02:13,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 20:02:13,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:02:13,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 20:02:13,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 20:02:13,205 INFO L87 Difference]: Start difference. First operand 11826 states and 18495 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 20:02:19,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:02:19,869 INFO L93 Difference]: Finished difference Result 48139 states and 75856 transitions. [2021-12-06 20:02:19,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 20:02:19,870 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 178 [2021-12-06 20:02:19,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:02:19,955 INFO L225 Difference]: With dead ends: 48139 [2021-12-06 20:02:19,955 INFO L226 Difference]: Without dead ends: 36334 [2021-12-06 20:02:19,980 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-06 20:02:19,980 INFO L933 BasicCegarLoop]: 712 mSDtfsCounter, 2116 mSDsluCounter, 1291 mSDsCounter, 0 mSdLazyCounter, 2613 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2148 SdHoareTripleChecker+Valid, 2003 SdHoareTripleChecker+Invalid, 2737 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 2613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-06 20:02:19,980 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2148 Valid, 2003 Invalid, 2737 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 2613 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-06 20:02:20,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36334 states. [2021-12-06 20:02:21,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36334 to 23251. [2021-12-06 20:02:21,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23251 states, 21458 states have (on average 1.5439463137291454) internal successors, (33130), 21523 states have internal predecessors, (33130), 1338 states have call successors, (1338), 390 states have call predecessors, (1338), 454 states have return successors, (2131), 1401 states have call predecessors, (2131), 1338 states have call successors, (2131) [2021-12-06 20:02:22,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23251 states to 23251 states and 36599 transitions. [2021-12-06 20:02:22,037 INFO L78 Accepts]: Start accepts. Automaton has 23251 states and 36599 transitions. Word has length 178 [2021-12-06 20:02:22,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:02:22,037 INFO L470 AbstractCegarLoop]: Abstraction has 23251 states and 36599 transitions. [2021-12-06 20:02:22,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 20:02:22,038 INFO L276 IsEmpty]: Start isEmpty. Operand 23251 states and 36599 transitions. [2021-12-06 20:02:22,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-12-06 20:02:22,046 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:02:22,046 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] [2021-12-06 20:02:22,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-06 20:02:22,046 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:02:22,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:02:22,046 INFO L85 PathProgramCache]: Analyzing trace with hash 1234497006, now seen corresponding path program 1 times [2021-12-06 20:02:22,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:02:22,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779586382] [2021-12-06 20:02:22,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:02:22,047 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:02:22,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:02:22,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:02:22,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:02:22,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-06 20:02:22,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:02:22,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-06 20:02:22,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:02:22,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-06 20:02:22,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:02:22,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-06 20:02:22,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:02:22,151 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 20:02:22,151 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:02:22,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779586382] [2021-12-06 20:02:22,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779586382] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:02:22,151 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:02:22,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 20:02:22,152 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797463491] [2021-12-06 20:02:22,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:02:22,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 20:02:22,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:02:22,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 20:02:22,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 20:02:22,153 INFO L87 Difference]: Start difference. First operand 23251 states and 36599 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 20:02:33,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:02:33,183 INFO L93 Difference]: Finished difference Result 94218 states and 149334 transitions. [2021-12-06 20:02:33,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 20:02:33,183 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 178 [2021-12-06 20:02:33,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:02:33,348 INFO L225 Difference]: With dead ends: 94218 [2021-12-06 20:02:33,348 INFO L226 Difference]: Without dead ends: 70988 [2021-12-06 20:02:33,402 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 20:02:33,402 INFO L933 BasicCegarLoop]: 931 mSDtfsCounter, 1985 mSDsluCounter, 1925 mSDsCounter, 0 mSdLazyCounter, 2896 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2017 SdHoareTripleChecker+Valid, 2856 SdHoareTripleChecker+Invalid, 2986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 2896 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-06 20:02:33,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2017 Valid, 2856 Invalid, 2986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 2896 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-06 20:02:33,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70988 states. [2021-12-06 20:02:37,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70988 to 45748. [2021-12-06 20:02:37,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45748 states, 42259 states have (on average 1.544286424193663) internal successors, (65260), 42388 states have internal predecessors, (65260), 2586 states have call successors, (2586), 774 states have call predecessors, (2586), 902 states have return successors, (4901), 2713 states have call predecessors, (4901), 2586 states have call successors, (4901) [2021-12-06 20:02:37,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45748 states to 45748 states and 72747 transitions. [2021-12-06 20:02:37,721 INFO L78 Accepts]: Start accepts. Automaton has 45748 states and 72747 transitions. Word has length 178 [2021-12-06 20:02:37,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:02:37,721 INFO L470 AbstractCegarLoop]: Abstraction has 45748 states and 72747 transitions. [2021-12-06 20:02:37,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 20:02:37,721 INFO L276 IsEmpty]: Start isEmpty. Operand 45748 states and 72747 transitions. [2021-12-06 20:02:37,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-12-06 20:02:37,734 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:02:37,734 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] [2021-12-06 20:02:37,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-06 20:02:37,735 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:02:37,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:02:37,735 INFO L85 PathProgramCache]: Analyzing trace with hash 1078516464, now seen corresponding path program 1 times [2021-12-06 20:02:37,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:02:37,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488161993] [2021-12-06 20:02:37,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:02:37,735 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:02:37,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:02:37,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:02:37,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:02:37,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-06 20:02:37,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:02:37,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-06 20:02:37,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:02:37,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-06 20:02:37,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:02:37,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-06 20:02:37,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:02:37,823 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 20:02:37,823 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:02:37,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488161993] [2021-12-06 20:02:37,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488161993] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:02:37,823 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:02:37,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 20:02:37,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410467303] [2021-12-06 20:02:37,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:02:37,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 20:02:37,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:02:37,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 20:02:37,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 20:02:37,824 INFO L87 Difference]: Start difference. First operand 45748 states and 72747 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 20:02:57,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:02:57,588 INFO L93 Difference]: Finished difference Result 184233 states and 294748 transitions. [2021-12-06 20:02:57,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 20:02:57,588 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 178 [2021-12-06 20:02:57,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:02:58,001 INFO L225 Difference]: With dead ends: 184233 [2021-12-06 20:02:58,001 INFO L226 Difference]: Without dead ends: 138506 [2021-12-06 20:02:58,092 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-06 20:02:58,092 INFO L933 BasicCegarLoop]: 1099 mSDtfsCounter, 1641 mSDsluCounter, 1928 mSDsCounter, 0 mSdLazyCounter, 3403 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1659 SdHoareTripleChecker+Valid, 3027 SdHoareTripleChecker+Invalid, 3490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 3403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-06 20:02:58,092 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1659 Valid, 3027 Invalid, 3490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 3403 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-06 20:02:58,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138506 states. [2021-12-06 20:03:06,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138506 to 90997. [2021-12-06 20:03:06,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90997 states, 84180 states have (on average 1.5454264670943216) internal successors, (130094), 84437 states have internal predecessors, (130094), 5018 states have call successors, (5018), 1542 states have call predecessors, (5018), 1798 states have return successors, (11835), 5273 states have call predecessors, (11835), 5018 states have call successors, (11835) [2021-12-06 20:03:06,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90997 states to 90997 states and 146947 transitions. [2021-12-06 20:03:06,741 INFO L78 Accepts]: Start accepts. Automaton has 90997 states and 146947 transitions. Word has length 178 [2021-12-06 20:03:06,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:03:06,741 INFO L470 AbstractCegarLoop]: Abstraction has 90997 states and 146947 transitions. [2021-12-06 20:03:06,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 20:03:06,741 INFO L276 IsEmpty]: Start isEmpty. Operand 90997 states and 146947 transitions. [2021-12-06 20:03:06,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-12-06 20:03:06,772 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:03:06,772 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] [2021-12-06 20:03:06,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-06 20:03:06,773 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:03:06,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:03:06,773 INFO L85 PathProgramCache]: Analyzing trace with hash 1489126830, now seen corresponding path program 1 times [2021-12-06 20:03:06,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:03:06,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11108611] [2021-12-06 20:03:06,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:03:06,773 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:03:06,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:03:06,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:03:06,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:03:06,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-06 20:03:06,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:03:06,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-06 20:03:06,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:03:06,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-06 20:03:06,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:03:06,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-06 20:03:06,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:03:06,869 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 20:03:06,869 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:03:06,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11108611] [2021-12-06 20:03:06,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11108611] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:03:06,869 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:03:06,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 20:03:06,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303417389] [2021-12-06 20:03:06,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:03:06,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 20:03:06,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:03:06,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 20:03:06,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 20:03:06,870 INFO L87 Difference]: Start difference. First operand 90997 states and 146947 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 20:03:44,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:03:44,146 INFO L93 Difference]: Finished difference Result 362728 states and 589042 transitions. [2021-12-06 20:03:44,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 20:03:44,146 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 178 [2021-12-06 20:03:44,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:03:45,130 INFO L225 Difference]: With dead ends: 362728 [2021-12-06 20:03:45,130 INFO L226 Difference]: Without dead ends: 271752 [2021-12-06 20:03:45,351 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-06 20:03:45,351 INFO L933 BasicCegarLoop]: 922 mSDtfsCounter, 1906 mSDsluCounter, 1928 mSDsCounter, 0 mSdLazyCounter, 2881 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1938 SdHoareTripleChecker+Valid, 2850 SdHoareTripleChecker+Invalid, 2971 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 2881 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-06 20:03:45,351 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1938 Valid, 2850 Invalid, 2971 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 2881 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-06 20:03:45,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271752 states. [2021-12-06 20:04:02,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271752 to 181366. [2021-12-06 20:04:02,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181366 states, 168021 states have (on average 1.5467590360728718) internal successors, (259888), 168534 states have internal predecessors, (259888), 9754 states have call successors, (9754), 3078 states have call predecessors, (9754), 3590 states have return successors, (29949), 10265 states have call predecessors, (29949), 9754 states have call successors, (29949) [2021-12-06 20:04:03,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181366 states to 181366 states and 299591 transitions. [2021-12-06 20:04:03,771 INFO L78 Accepts]: Start accepts. Automaton has 181366 states and 299591 transitions. Word has length 178 [2021-12-06 20:04:03,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:04:03,771 INFO L470 AbstractCegarLoop]: Abstraction has 181366 states and 299591 transitions. [2021-12-06 20:04:03,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 20:04:03,771 INFO L276 IsEmpty]: Start isEmpty. Operand 181366 states and 299591 transitions. [2021-12-06 20:04:03,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-12-06 20:04:03,832 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:04:03,832 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] [2021-12-06 20:04:03,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-12-06 20:04:03,832 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:04:03,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:04:03,832 INFO L85 PathProgramCache]: Analyzing trace with hash -298742992, now seen corresponding path program 1 times [2021-12-06 20:04:03,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:04:03,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905294258] [2021-12-06 20:04:03,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:04:03,833 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:04:03,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:04:03,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:04:03,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:04:03,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-06 20:04:03,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:04:03,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-06 20:04:03,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:04:03,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-06 20:04:03,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:04:03,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-06 20:04:03,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:04:03,930 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 20:04:03,930 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:04:03,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905294258] [2021-12-06 20:04:03,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905294258] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:04:03,930 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:04:03,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 20:04:03,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539161129] [2021-12-06 20:04:03,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:04:03,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 20:04:03,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:04:03,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 20:04:03,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-06 20:04:03,931 INFO L87 Difference]: Start difference. First operand 181366 states and 299591 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 20:04:33,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:04:33,227 INFO L93 Difference]: Finished difference Result 419264 states and 709330 transitions. [2021-12-06 20:04:33,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 20:04:33,228 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 178 [2021-12-06 20:04:33,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:04:34,083 INFO L225 Difference]: With dead ends: 419264 [2021-12-06 20:04:34,083 INFO L226 Difference]: Without dead ends: 237919 [2021-12-06 20:04:34,515 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-06 20:04:34,515 INFO L933 BasicCegarLoop]: 594 mSDtfsCounter, 1284 mSDsluCounter, 737 mSDsCounter, 0 mSdLazyCounter, 1232 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1304 SdHoareTripleChecker+Valid, 1331 SdHoareTripleChecker+Invalid, 1351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 1232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:04:34,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1304 Valid, 1331 Invalid, 1351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 1232 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-06 20:04:34,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237919 states. [2021-12-06 20:04:52,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237919 to 181366. [2021-12-06 20:04:52,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181366 states, 168021 states have (on average 1.5437058462930229) internal successors, (259375), 168534 states have internal predecessors, (259375), 9754 states have call successors, (9754), 3078 states have call predecessors, (9754), 3590 states have return successors, (29949), 10265 states have call predecessors, (29949), 9754 states have call successors, (29949) [2021-12-06 20:04:53,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181366 states to 181366 states and 299078 transitions. [2021-12-06 20:04:53,620 INFO L78 Accepts]: Start accepts. Automaton has 181366 states and 299078 transitions. Word has length 178 [2021-12-06 20:04:53,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:04:53,620 INFO L470 AbstractCegarLoop]: Abstraction has 181366 states and 299078 transitions. [2021-12-06 20:04:53,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 20:04:53,621 INFO L276 IsEmpty]: Start isEmpty. Operand 181366 states and 299078 transitions. [2021-12-06 20:04:53,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-12-06 20:04:53,671 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:04:53,671 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] [2021-12-06 20:04:53,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-12-06 20:04:53,671 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:04:53,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:04:53,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1860341102, now seen corresponding path program 1 times [2021-12-06 20:04:53,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:04:53,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908088034] [2021-12-06 20:04:53,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:04:53,672 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:04:53,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:04:53,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:04:53,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:04:53,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-06 20:04:53,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:04:53,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-06 20:04:53,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:04:53,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-06 20:04:53,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:04:53,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-06 20:04:53,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:04:53,760 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 20:04:53,760 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:04:53,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908088034] [2021-12-06 20:04:53,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908088034] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:04:53,760 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:04:53,760 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 20:04:53,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105104589] [2021-12-06 20:04:53,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:04:53,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 20:04:53,761 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:04:53,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 20:04:53,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 20:04:53,761 INFO L87 Difference]: Start difference. First operand 181366 states and 299078 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 20:06:06,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:06:06,328 INFO L93 Difference]: Finished difference Result 699619 states and 1162476 transitions. [2021-12-06 20:06:06,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 20:06:06,329 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 178 [2021-12-06 20:06:06,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:06:08,198 INFO L225 Difference]: With dead ends: 699619 [2021-12-06 20:06:08,198 INFO L226 Difference]: Without dead ends: 518274 [2021-12-06 20:06:08,832 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-06 20:06:08,833 INFO L933 BasicCegarLoop]: 1013 mSDtfsCounter, 1591 mSDsluCounter, 1928 mSDsCounter, 0 mSdLazyCounter, 3215 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1609 SdHoareTripleChecker+Valid, 2941 SdHoareTripleChecker+Invalid, 3305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 3215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-06 20:06:08,833 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1609 Valid, 2941 Invalid, 3305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 3215 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-06 20:06:09,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518274 states. [2021-12-06 20:06:46,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518274 to 362873. [2021-12-06 20:06:46,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362873 states, 336728 states have (on average 1.5450007127414411) internal successors, (520245), 337753 states have internal predecessors, (520245), 18970 states have call successors, (18970), 6150 states have call predecessors, (18970), 7174 states have return successors, (79043), 19993 states have call predecessors, (79043), 18970 states have call successors, (79043) [2021-12-06 20:06:48,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362873 states to 362873 states and 618258 transitions. [2021-12-06 20:06:48,248 INFO L78 Accepts]: Start accepts. Automaton has 362873 states and 618258 transitions. Word has length 178 [2021-12-06 20:06:48,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:06:48,248 INFO L470 AbstractCegarLoop]: Abstraction has 362873 states and 618258 transitions. [2021-12-06 20:06:48,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 20:06:48,248 INFO L276 IsEmpty]: Start isEmpty. Operand 362873 states and 618258 transitions. [2021-12-06 20:06:48,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-12-06 20:06:48,421 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:06:48,421 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] [2021-12-06 20:06:48,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-12-06 20:06:48,421 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:06:48,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:06:48,421 INFO L85 PathProgramCache]: Analyzing trace with hash -2016737492, now seen corresponding path program 1 times [2021-12-06 20:06:48,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:06:48,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449608918] [2021-12-06 20:06:48,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:06:48,422 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:06:48,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:06:48,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:06:48,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:06:48,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-06 20:06:48,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:06:48,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-06 20:06:48,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:06:48,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-06 20:06:48,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:06:48,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-06 20:06:48,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:06:48,513 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 20:06:48,513 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:06:48,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449608918] [2021-12-06 20:06:48,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449608918] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:06:48,514 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:06:48,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 20:06:48,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400010158] [2021-12-06 20:06:48,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:06:48,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 20:06:48,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:06:48,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 20:06:48,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 20:06:48,514 INFO L87 Difference]: Start difference. First operand 362873 states and 618258 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 20:09:13,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:09:13,741 INFO L93 Difference]: Finished difference Result 1380324 states and 2373382 transitions. [2021-12-06 20:09:13,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 20:09:13,741 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 178 [2021-12-06 20:09:13,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:09:18,203 INFO L225 Difference]: With dead ends: 1380324 [2021-12-06 20:09:18,203 INFO L226 Difference]: Without dead ends: 1017472 [2021-12-06 20:09:19,829 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-06 20:09:19,830 INFO L933 BasicCegarLoop]: 900 mSDtfsCounter, 1740 mSDsluCounter, 1928 mSDsCounter, 0 mSdLazyCounter, 2833 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1772 SdHoareTripleChecker+Valid, 2828 SdHoareTripleChecker+Invalid, 2926 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 2833 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-06 20:09:19,830 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1772 Valid, 2828 Invalid, 2926 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 2833 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-06 20:09:20,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1017472 states. [2021-12-06 20:10:39,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1017472 to 725370. [2021-12-06 20:10:39,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 725370 states, 674137 states have (on average 1.5464022891489415) internal successors, (1042487), 676186 states have internal predecessors, (1042487), 36890 states have call successors, (36890), 12294 states have call predecessors, (36890), 14342 states have return successors, (216085), 38937 states have call predecessors, (216085), 36890 states have call successors, (216085) [2021-12-06 20:10:43,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 725370 states to 725370 states and 1295462 transitions. [2021-12-06 20:10:43,892 INFO L78 Accepts]: Start accepts. Automaton has 725370 states and 1295462 transitions. Word has length 178 [2021-12-06 20:10:43,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:10:43,893 INFO L470 AbstractCegarLoop]: Abstraction has 725370 states and 1295462 transitions. [2021-12-06 20:10:43,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 20:10:43,893 INFO L276 IsEmpty]: Start isEmpty. Operand 725370 states and 1295462 transitions. [2021-12-06 20:10:44,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-12-06 20:10:44,102 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:10:44,102 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] [2021-12-06 20:10:44,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-12-06 20:10:44,103 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:10:44,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:10:44,103 INFO L85 PathProgramCache]: Analyzing trace with hash -617783890, now seen corresponding path program 1 times [2021-12-06 20:10:44,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:10:44,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209419432] [2021-12-06 20:10:44,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:10:44,104 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:10:44,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:10:44,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:10:44,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:10:44,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-06 20:10:44,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:10:44,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-06 20:10:44,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:10:44,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-06 20:10:44,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:10:44,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-06 20:10:44,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:10:44,192 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 20:10:44,192 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:10:44,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209419432] [2021-12-06 20:10:44,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209419432] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:10:44,192 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:10:44,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 20:10:44,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771554855] [2021-12-06 20:10:44,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:10:44,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 20:10:44,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:10:44,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 20:10:44,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 20:10:44,193 INFO L87 Difference]: Start difference. First operand 725370 states and 1295462 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5)