./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label46+token_ring.05.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70894f2-3652-4c16-b5dd-1236c8d50bab/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70894f2-3652-4c16-b5dd-1236c8d50bab/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_c70894f2-3652-4c16-b5dd-1236c8d50bab/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70894f2-3652-4c16-b5dd-1236c8d50bab/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label46+token_ring.05.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70894f2-3652-4c16-b5dd-1236c8d50bab/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_c70894f2-3652-4c16-b5dd-1236c8d50bab/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 5ee0afe9c2a2e5e350a29156a4a7c18a224cec42ab7ff37fc9f10d35d9e173ae --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 22:26:13,390 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 22:26:13,392 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 22:26:13,422 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 22:26:13,422 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 22:26:13,423 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 22:26:13,425 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 22:26:13,427 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 22:26:13,429 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 22:26:13,430 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 22:26:13,432 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 22:26:13,433 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 22:26:13,434 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 22:26:13,435 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 22:26:13,437 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 22:26:13,438 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 22:26:13,439 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 22:26:13,440 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 22:26:13,442 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 22:26:13,445 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 22:26:13,446 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 22:26:13,448 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 22:26:13,449 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 22:26:13,450 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 22:26:13,454 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 22:26:13,454 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 22:26:13,454 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 22:26:13,455 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 22:26:13,456 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 22:26:13,457 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 22:26:13,457 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 22:26:13,458 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 22:26:13,459 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 22:26:13,460 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 22:26:13,461 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 22:26:13,461 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 22:26:13,462 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 22:26:13,462 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 22:26:13,462 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 22:26:13,463 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 22:26:13,464 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 22:26:13,464 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70894f2-3652-4c16-b5dd-1236c8d50bab/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 22:26:13,481 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 22:26:13,481 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 22:26:13,481 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 22:26:13,481 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 22:26:13,482 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 22:26:13,482 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 22:26:13,482 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 22:26:13,483 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 22:26:13,483 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 22:26:13,483 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 22:26:13,483 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 22:26:13,483 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 22:26:13,483 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 22:26:13,483 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 22:26:13,484 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 22:26:13,484 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 22:26:13,484 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 22:26:13,484 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 22:26:13,484 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 22:26:13,484 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 22:26:13,484 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 22:26:13,484 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 22:26:13,485 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 22:26:13,485 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 22:26:13,485 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 22:26:13,485 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 22:26:13,485 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 22:26:13,485 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 22:26:13,485 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 22:26:13,485 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 22:26:13,486 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 22:26:13,486 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 22:26:13,486 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 22:26:13,486 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 22:26:13,486 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_c70894f2-3652-4c16-b5dd-1236c8d50bab/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70894f2-3652-4c16-b5dd-1236c8d50bab/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5ee0afe9c2a2e5e350a29156a4a7c18a224cec42ab7ff37fc9f10d35d9e173ae [2021-12-06 22:26:13,664 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 22:26:13,683 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 22:26:13,685 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 22:26:13,686 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 22:26:13,686 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 22:26:13,688 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70894f2-3652-4c16-b5dd-1236c8d50bab/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/combinations/Problem05_label46+token_ring.05.cil-1.c [2021-12-06 22:26:13,738 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70894f2-3652-4c16-b5dd-1236c8d50bab/bin/uautomizer-DrprNOufMa/data/5b9437815/038c9e81b63644da8714e0db0fd9a976/FLAGcdabb6231 [2021-12-06 22:26:14,461 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 22:26:14,462 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70894f2-3652-4c16-b5dd-1236c8d50bab/sv-benchmarks/c/combinations/Problem05_label46+token_ring.05.cil-1.c [2021-12-06 22:26:14,495 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70894f2-3652-4c16-b5dd-1236c8d50bab/bin/uautomizer-DrprNOufMa/data/5b9437815/038c9e81b63644da8714e0db0fd9a976/FLAGcdabb6231 [2021-12-06 22:26:14,756 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70894f2-3652-4c16-b5dd-1236c8d50bab/bin/uautomizer-DrprNOufMa/data/5b9437815/038c9e81b63644da8714e0db0fd9a976 [2021-12-06 22:26:14,758 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 22:26:14,760 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 22:26:14,761 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 22:26:14,761 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 22:26:14,763 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 22:26:14,763 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 10:26:14" (1/1) ... [2021-12-06 22:26:14,764 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27fdcc13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:26:14, skipping insertion in model container [2021-12-06 22:26:14,764 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 10:26:14" (1/1) ... [2021-12-06 22:26:14,770 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 22:26:14,958 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 22:26:16,327 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_c70894f2-3652-4c16-b5dd-1236c8d50bab/sv-benchmarks/c/combinations/Problem05_label46+token_ring.05.cil-1.c[382357,382370] [2021-12-06 22:26:16,346 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_c70894f2-3652-4c16-b5dd-1236c8d50bab/sv-benchmarks/c/combinations/Problem05_label46+token_ring.05.cil-1.c[383339,383352] [2021-12-06 22:26:16,510 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 22:26:16,516 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 22:26:17,304 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_c70894f2-3652-4c16-b5dd-1236c8d50bab/sv-benchmarks/c/combinations/Problem05_label46+token_ring.05.cil-1.c[382357,382370] [2021-12-06 22:26:17,306 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_c70894f2-3652-4c16-b5dd-1236c8d50bab/sv-benchmarks/c/combinations/Problem05_label46+token_ring.05.cil-1.c[383339,383352] [2021-12-06 22:26:17,315 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 22:26:17,376 INFO L208 MainTranslator]: Completed translation [2021-12-06 22:26:17,376 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:26:17 WrapperNode [2021-12-06 22:26:17,376 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 22:26:17,377 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 22:26:17,377 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 22:26:17,377 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 22:26:17,383 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:26:17" (1/1) ... [2021-12-06 22:26:17,455 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:26:17" (1/1) ... [2021-12-06 22:26:17,724 INFO L137 Inliner]: procedures = 54, calls = 56, calls flagged for inlining = 32, calls inlined = 32, statements flattened = 12793 [2021-12-06 22:26:17,724 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 22:26:17,725 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 22:26:17,725 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 22:26:17,725 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 22:26:17,741 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:26:17" (1/1) ... [2021-12-06 22:26:17,741 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:26:17" (1/1) ... [2021-12-06 22:26:17,805 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:26:17" (1/1) ... [2021-12-06 22:26:17,806 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:26:17" (1/1) ... [2021-12-06 22:26:18,011 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:26:17" (1/1) ... [2021-12-06 22:26:18,071 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:26:17" (1/1) ... [2021-12-06 22:26:18,118 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:26:17" (1/1) ... [2021-12-06 22:26:18,169 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 22:26:18,169 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 22:26:18,169 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 22:26:18,169 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 22:26:18,170 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:26:17" (1/1) ... [2021-12-06 22:26:18,176 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 22:26:18,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70894f2-3652-4c16-b5dd-1236c8d50bab/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:26:18,196 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70894f2-3652-4c16-b5dd-1236c8d50bab/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 22:26:18,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70894f2-3652-4c16-b5dd-1236c8d50bab/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 22:26:18,236 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 22:26:18,236 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2021-12-06 22:26:18,236 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2021-12-06 22:26:18,236 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-06 22:26:18,237 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-06 22:26:18,237 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2021-12-06 22:26:18,237 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2021-12-06 22:26:18,237 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2021-12-06 22:26:18,237 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2021-12-06 22:26:18,237 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2021-12-06 22:26:18,237 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2021-12-06 22:26:18,237 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2021-12-06 22:26:18,238 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2021-12-06 22:26:18,238 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 22:26:18,238 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 22:26:18,238 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 22:26:18,331 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 22:26:18,333 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 22:26:22,467 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 22:26:22,493 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 22:26:22,493 INFO L301 CfgBuilder]: Removed 9 assume(true) statements. [2021-12-06 22:26:22,497 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 10:26:22 BoogieIcfgContainer [2021-12-06 22:26:22,497 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 22:26:22,498 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 22:26:22,498 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 22:26:22,500 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 22:26:22,501 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 10:26:14" (1/3) ... [2021-12-06 22:26:22,501 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55d747fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 10:26:22, skipping insertion in model container [2021-12-06 22:26:22,501 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:26:17" (2/3) ... [2021-12-06 22:26:22,501 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55d747fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 10:26:22, skipping insertion in model container [2021-12-06 22:26:22,501 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 10:26:22" (3/3) ... [2021-12-06 22:26:22,502 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem05_label46+token_ring.05.cil-1.c [2021-12-06 22:26:22,506 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 22:26:22,506 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-06 22:26:22,551 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 22:26:22,557 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 22:26:22,557 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-06 22:26:22,619 INFO L276 IsEmpty]: Start isEmpty. Operand has 2390 states, 2362 states have (on average 1.8526672311600338) internal successors, (4376), 2365 states have internal predecessors, (4376), 19 states have call successors, (19), 6 states have call predecessors, (19), 6 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2021-12-06 22:26:22,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-06 22:26:22,629 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:26:22,630 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] [2021-12-06 22:26:22,631 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:26:22,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:26:22,636 INFO L85 PathProgramCache]: Analyzing trace with hash -1427785225, now seen corresponding path program 1 times [2021-12-06 22:26:22,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:26:22,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088667808] [2021-12-06 22:26:22,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:26:22,646 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:26:22,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:22,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 22:26:22,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:22,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 22:26:22,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:22,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-06 22:26:22,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:22,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-06 22:26:22,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:22,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-06 22:26:22,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:22,938 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 22:26:22,939 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:26:22,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088667808] [2021-12-06 22:26:22,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088667808] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:26:22,940 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:26:22,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 22:26:22,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080651339] [2021-12-06 22:26:22,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:26:22,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 22:26:22,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:26:22,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 22:26:22,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 22:26:22,981 INFO L87 Difference]: Start difference. First operand has 2390 states, 2362 states have (on average 1.8526672311600338) internal successors, (4376), 2365 states have internal predecessors, (4376), 19 states have call successors, (19), 6 states have call predecessors, (19), 6 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) Second operand has 5 states, 5 states have (on average 18.2) internal successors, (91), 3 states have internal predecessors, (91), 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 22:26:23,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:26:23,648 INFO L93 Difference]: Finished difference Result 4837 states and 8925 transitions. [2021-12-06 22:26:23,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 22:26:23,650 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 3 states have internal predecessors, (91), 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 101 [2021-12-06 22:26:23,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:26:23,671 INFO L225 Difference]: With dead ends: 4837 [2021-12-06 22:26:23,672 INFO L226 Difference]: Without dead ends: 2388 [2021-12-06 22:26:23,678 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-06 22:26:23,681 INFO L933 BasicCegarLoop]: 4361 mSDtfsCounter, 507 mSDsluCounter, 12296 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 524 SdHoareTripleChecker+Valid, 16657 SdHoareTripleChecker+Invalid, 385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 22:26:23,682 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [524 Valid, 16657 Invalid, 385 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [46 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 22:26:23,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2388 states. [2021-12-06 22:26:23,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2388 to 2323. [2021-12-06 22:26:23,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2323 states, 2296 states have (on average 1.84102787456446) internal successors, (4227), 2298 states have internal predecessors, (4227), 19 states have call successors, (19), 6 states have call predecessors, (19), 6 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2021-12-06 22:26:23,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2323 states to 2323 states and 4265 transitions. [2021-12-06 22:26:23,794 INFO L78 Accepts]: Start accepts. Automaton has 2323 states and 4265 transitions. Word has length 101 [2021-12-06 22:26:23,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:26:23,794 INFO L470 AbstractCegarLoop]: Abstraction has 2323 states and 4265 transitions. [2021-12-06 22:26:23,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 3 states have internal predecessors, (91), 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 22:26:23,794 INFO L276 IsEmpty]: Start isEmpty. Operand 2323 states and 4265 transitions. [2021-12-06 22:26:23,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-06 22:26:23,799 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:26:23,799 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] [2021-12-06 22:26:23,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 22:26:23,800 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:26:23,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:26:23,800 INFO L85 PathProgramCache]: Analyzing trace with hash 990118841, now seen corresponding path program 1 times [2021-12-06 22:26:23,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:26:23,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293308332] [2021-12-06 22:26:23,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:26:23,801 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:26:23,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:23,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 22:26:23,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:23,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 22:26:23,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:23,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-06 22:26:23,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:23,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-06 22:26:23,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:23,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-06 22:26:23,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:23,978 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 22:26:23,978 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:26:23,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293308332] [2021-12-06 22:26:23,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293308332] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:26:23,978 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:26:23,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 22:26:23,979 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670564778] [2021-12-06 22:26:23,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:26:23,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 22:26:23,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:26:23,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 22:26:23,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-06 22:26:23,981 INFO L87 Difference]: Start difference. First operand 2323 states and 4265 transitions. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 4 states have internal predecessors, (91), 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 22:26:24,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:26:24,934 INFO L93 Difference]: Finished difference Result 2835 states and 5072 transitions. [2021-12-06 22:26:24,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 22:26:24,934 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 4 states have internal predecessors, (91), 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 101 [2021-12-06 22:26:24,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:26:24,948 INFO L225 Difference]: With dead ends: 2835 [2021-12-06 22:26:24,948 INFO L226 Difference]: Without dead ends: 2646 [2021-12-06 22:26:24,950 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-12-06 22:26:24,951 INFO L933 BasicCegarLoop]: 4316 mSDtfsCounter, 4705 mSDsluCounter, 12418 mSDsCounter, 0 mSdLazyCounter, 952 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4717 SdHoareTripleChecker+Valid, 16734 SdHoareTripleChecker+Invalid, 1040 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 952 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 22:26:24,951 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4717 Valid, 16734 Invalid, 1040 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 952 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-06 22:26:24,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2646 states. [2021-12-06 22:26:25,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2646 to 2517. [2021-12-06 22:26:25,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2517 states, 2469 states have (on average 1.820980153908465) internal successors, (4496), 2472 states have internal predecessors, (4496), 33 states have call successors, (33), 12 states have call predecessors, (33), 13 states have return successors, (36), 33 states have call predecessors, (36), 33 states have call successors, (36) [2021-12-06 22:26:25,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2517 states to 2517 states and 4565 transitions. [2021-12-06 22:26:25,021 INFO L78 Accepts]: Start accepts. Automaton has 2517 states and 4565 transitions. Word has length 101 [2021-12-06 22:26:25,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:26:25,021 INFO L470 AbstractCegarLoop]: Abstraction has 2517 states and 4565 transitions. [2021-12-06 22:26:25,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 4 states have internal predecessors, (91), 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 22:26:25,022 INFO L276 IsEmpty]: Start isEmpty. Operand 2517 states and 4565 transitions. [2021-12-06 22:26:25,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-06 22:26:25,025 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:26:25,025 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:26:25,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 22:26:25,025 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:26:25,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:26:25,026 INFO L85 PathProgramCache]: Analyzing trace with hash -726765763, now seen corresponding path program 1 times [2021-12-06 22:26:25,026 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:26:25,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059891865] [2021-12-06 22:26:25,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:26:25,026 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:26:25,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:25,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 22:26:25,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:25,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 22:26:25,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:25,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-06 22:26:25,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:25,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-06 22:26:25,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:25,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-06 22:26:25,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:25,132 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 22:26:25,133 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:26:25,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059891865] [2021-12-06 22:26:25,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059891865] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:26:25,133 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:26:25,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 22:26:25,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915710390] [2021-12-06 22:26:25,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:26:25,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 22:26:25,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:26:25,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 22:26:25,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-06 22:26:25,135 INFO L87 Difference]: Start difference. First operand 2517 states and 4565 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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 22:26:25,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:26:25,781 INFO L93 Difference]: Finished difference Result 3037 states and 5388 transitions. [2021-12-06 22:26:25,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 22:26:25,781 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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 101 [2021-12-06 22:26:25,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:26:25,795 INFO L225 Difference]: With dead ends: 3037 [2021-12-06 22:26:25,796 INFO L226 Difference]: Without dead ends: 2654 [2021-12-06 22:26:25,798 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 22:26:25,799 INFO L933 BasicCegarLoop]: 4273 mSDtfsCounter, 4502 mSDsluCounter, 16317 mSDsCounter, 0 mSdLazyCounter, 750 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4515 SdHoareTripleChecker+Valid, 20590 SdHoareTripleChecker+Invalid, 816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 22:26:25,800 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4515 Valid, 20590 Invalid, 816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 750 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 22:26:25,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2654 states. [2021-12-06 22:26:25,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2654 to 2517. [2021-12-06 22:26:25,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2517 states, 2469 states have (on average 1.8201701093560145) internal successors, (4494), 2472 states have internal predecessors, (4494), 33 states have call successors, (33), 12 states have call predecessors, (33), 13 states have return successors, (36), 33 states have call predecessors, (36), 33 states have call successors, (36) [2021-12-06 22:26:25,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2517 states to 2517 states and 4563 transitions. [2021-12-06 22:26:25,867 INFO L78 Accepts]: Start accepts. Automaton has 2517 states and 4563 transitions. Word has length 101 [2021-12-06 22:26:25,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:26:25,867 INFO L470 AbstractCegarLoop]: Abstraction has 2517 states and 4563 transitions. [2021-12-06 22:26:25,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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 22:26:25,867 INFO L276 IsEmpty]: Start isEmpty. Operand 2517 states and 4563 transitions. [2021-12-06 22:26:25,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-06 22:26:25,869 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:26:25,870 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] [2021-12-06 22:26:25,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-06 22:26:25,870 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:26:25,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:26:25,871 INFO L85 PathProgramCache]: Analyzing trace with hash 1689070587, now seen corresponding path program 1 times [2021-12-06 22:26:25,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:26:25,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702590882] [2021-12-06 22:26:25,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:26:25,871 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:26:25,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:25,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 22:26:25,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:25,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 22:26:25,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:25,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-06 22:26:25,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:25,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-06 22:26:25,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:25,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-06 22:26:25,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:25,980 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 22:26:25,980 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:26:25,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702590882] [2021-12-06 22:26:25,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702590882] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:26:25,980 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:26:25,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 22:26:25,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725719210] [2021-12-06 22:26:25,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:26:25,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 22:26:25,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:26:25,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 22:26:25,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 22:26:25,983 INFO L87 Difference]: Start difference. First operand 2517 states and 4563 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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 22:26:27,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:26:27,050 INFO L93 Difference]: Finished difference Result 3290 states and 5773 transitions. [2021-12-06 22:26:27,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 22:26:27,051 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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 101 [2021-12-06 22:26:27,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:26:27,064 INFO L225 Difference]: With dead ends: 3290 [2021-12-06 22:26:27,064 INFO L226 Difference]: Without dead ends: 2907 [2021-12-06 22:26:27,066 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-06 22:26:27,067 INFO L933 BasicCegarLoop]: 4451 mSDtfsCounter, 4704 mSDsluCounter, 16854 mSDsCounter, 0 mSdLazyCounter, 1475 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4716 SdHoareTripleChecker+Valid, 21305 SdHoareTripleChecker+Invalid, 1544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 1475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-06 22:26:27,067 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4716 Valid, 21305 Invalid, 1544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 1475 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-06 22:26:27,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2907 states. [2021-12-06 22:26:27,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2907 to 2699. [2021-12-06 22:26:27,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2699 states, 2630 states have (on average 1.8015209125475284) internal successors, (4738), 2634 states have internal predecessors, (4738), 47 states have call successors, (47), 18 states have call predecessors, (47), 20 states have return successors, (52), 48 states have call predecessors, (52), 47 states have call successors, (52) [2021-12-06 22:26:27,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2699 states to 2699 states and 4837 transitions. [2021-12-06 22:26:27,132 INFO L78 Accepts]: Start accepts. Automaton has 2699 states and 4837 transitions. Word has length 101 [2021-12-06 22:26:27,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:26:27,133 INFO L470 AbstractCegarLoop]: Abstraction has 2699 states and 4837 transitions. [2021-12-06 22:26:27,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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 22:26:27,133 INFO L276 IsEmpty]: Start isEmpty. Operand 2699 states and 4837 transitions. [2021-12-06 22:26:27,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-06 22:26:27,134 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:26:27,134 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] [2021-12-06 22:26:27,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-06 22:26:27,135 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:26:27,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:26:27,135 INFO L85 PathProgramCache]: Analyzing trace with hash -1039138759, now seen corresponding path program 1 times [2021-12-06 22:26:27,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:26:27,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055247331] [2021-12-06 22:26:27,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:26:27,135 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:26:27,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:27,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 22:26:27,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:27,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 22:26:27,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:27,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-06 22:26:27,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:27,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-06 22:26:27,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:27,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-06 22:26:27,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:27,212 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 22:26:27,212 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:26:27,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055247331] [2021-12-06 22:26:27,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055247331] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:26:27,212 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:26:27,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 22:26:27,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594581671] [2021-12-06 22:26:27,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:26:27,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 22:26:27,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:26:27,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 22:26:27,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 22:26:27,213 INFO L87 Difference]: Start difference. First operand 2699 states and 4837 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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 22:26:28,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:26:28,155 INFO L93 Difference]: Finished difference Result 3960 states and 6803 transitions. [2021-12-06 22:26:28,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 22:26:28,156 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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 101 [2021-12-06 22:26:28,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:26:28,171 INFO L225 Difference]: With dead ends: 3960 [2021-12-06 22:26:28,171 INFO L226 Difference]: Without dead ends: 3395 [2021-12-06 22:26:28,174 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-06 22:26:28,175 INFO L933 BasicCegarLoop]: 4444 mSDtfsCounter, 4700 mSDsluCounter, 16850 mSDsCounter, 0 mSdLazyCounter, 1459 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4712 SdHoareTripleChecker+Valid, 21294 SdHoareTripleChecker+Invalid, 1529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 22:26:28,175 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4712 Valid, 21294 Invalid, 1529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1459 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-06 22:26:28,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3395 states. [2021-12-06 22:26:28,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3395 to 3066. [2021-12-06 22:26:28,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3066 states, 2955 states have (on average 1.7702199661590525) internal successors, (5231), 2961 states have internal predecessors, (5231), 75 states have call successors, (75), 30 states have call predecessors, (75), 34 states have return successors, (88), 78 states have call predecessors, (88), 75 states have call successors, (88) [2021-12-06 22:26:28,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3066 states to 3066 states and 5394 transitions. [2021-12-06 22:26:28,278 INFO L78 Accepts]: Start accepts. Automaton has 3066 states and 5394 transitions. Word has length 101 [2021-12-06 22:26:28,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:26:28,278 INFO L470 AbstractCegarLoop]: Abstraction has 3066 states and 5394 transitions. [2021-12-06 22:26:28,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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 22:26:28,278 INFO L276 IsEmpty]: Start isEmpty. Operand 3066 states and 5394 transitions. [2021-12-06 22:26:28,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-06 22:26:28,281 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:26:28,281 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] [2021-12-06 22:26:28,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-06 22:26:28,282 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:26:28,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:26:28,282 INFO L85 PathProgramCache]: Analyzing trace with hash -2096976837, now seen corresponding path program 1 times [2021-12-06 22:26:28,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:26:28,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334800042] [2021-12-06 22:26:28,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:26:28,283 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:26:28,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:28,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 22:26:28,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:28,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 22:26:28,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:28,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-06 22:26:28,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:28,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-06 22:26:28,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:28,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-06 22:26:28,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:28,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:26:28,365 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:26:28,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334800042] [2021-12-06 22:26:28,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334800042] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:26:28,366 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:26:28,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 22:26:28,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036238354] [2021-12-06 22:26:28,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:26:28,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 22:26:28,367 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:26:28,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 22:26:28,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-06 22:26:28,367 INFO L87 Difference]: Start difference. First operand 3066 states and 5394 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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 22:26:28,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:26:28,980 INFO L93 Difference]: Finished difference Result 4317 states and 7351 transitions. [2021-12-06 22:26:28,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 22:26:28,981 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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 101 [2021-12-06 22:26:28,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:26:28,996 INFO L225 Difference]: With dead ends: 4317 [2021-12-06 22:26:28,996 INFO L226 Difference]: Without dead ends: 3385 [2021-12-06 22:26:29,000 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-06 22:26:29,001 INFO L933 BasicCegarLoop]: 4260 mSDtfsCounter, 4501 mSDsluCounter, 16316 mSDsCounter, 0 mSdLazyCounter, 711 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4514 SdHoareTripleChecker+Valid, 20576 SdHoareTripleChecker+Invalid, 780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 711 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 22:26:29,001 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4514 Valid, 20576 Invalid, 780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 711 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 22:26:29,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3385 states. [2021-12-06 22:26:29,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3385 to 3066. [2021-12-06 22:26:29,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3066 states, 2955 states have (on average 1.768527918781726) internal successors, (5226), 2961 states have internal predecessors, (5226), 75 states have call successors, (75), 30 states have call predecessors, (75), 34 states have return successors, (88), 78 states have call predecessors, (88), 75 states have call successors, (88) [2021-12-06 22:26:29,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3066 states to 3066 states and 5389 transitions. [2021-12-06 22:26:29,093 INFO L78 Accepts]: Start accepts. Automaton has 3066 states and 5389 transitions. Word has length 101 [2021-12-06 22:26:29,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:26:29,094 INFO L470 AbstractCegarLoop]: Abstraction has 3066 states and 5389 transitions. [2021-12-06 22:26:29,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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 22:26:29,094 INFO L276 IsEmpty]: Start isEmpty. Operand 3066 states and 5389 transitions. [2021-12-06 22:26:29,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-06 22:26:29,096 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:26:29,096 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] [2021-12-06 22:26:29,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-06 22:26:29,096 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:26:29,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:26:29,096 INFO L85 PathProgramCache]: Analyzing trace with hash 1055487993, now seen corresponding path program 1 times [2021-12-06 22:26:29,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:26:29,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829799831] [2021-12-06 22:26:29,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:26:29,097 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:26:29,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:29,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 22:26:29,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:29,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 22:26:29,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:29,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-06 22:26:29,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:29,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-06 22:26:29,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:29,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-06 22:26:29,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:29,181 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 22:26:29,181 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:26:29,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829799831] [2021-12-06 22:26:29,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829799831] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:26:29,182 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:26:29,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 22:26:29,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661123427] [2021-12-06 22:26:29,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:26:29,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 22:26:29,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:26:29,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 22:26:29,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 22:26:29,184 INFO L87 Difference]: Start difference. First operand 3066 states and 5389 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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 22:26:30,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:26:30,268 INFO L93 Difference]: Finished difference Result 5573 states and 9242 transitions. [2021-12-06 22:26:30,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 22:26:30,269 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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 101 [2021-12-06 22:26:30,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:26:30,293 INFO L225 Difference]: With dead ends: 5573 [2021-12-06 22:26:30,293 INFO L226 Difference]: Without dead ends: 4641 [2021-12-06 22:26:30,297 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-06 22:26:30,298 INFO L933 BasicCegarLoop]: 4310 mSDtfsCounter, 4950 mSDsluCounter, 16512 mSDsCounter, 0 mSdLazyCounter, 1273 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4968 SdHoareTripleChecker+Valid, 20822 SdHoareTripleChecker+Invalid, 1374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 1273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 22:26:30,298 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4968 Valid, 20822 Invalid, 1374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 1273 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-06 22:26:30,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4641 states. [2021-12-06 22:26:30,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4641 to 3796. [2021-12-06 22:26:30,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3796 states, 3605 states have (on average 1.7226074895977808) internal successors, (6210), 3615 states have internal predecessors, (6210), 127 states have call successors, (127), 54 states have call predecessors, (127), 62 states have return successors, (162), 134 states have call predecessors, (162), 127 states have call successors, (162) [2021-12-06 22:26:30,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3796 states to 3796 states and 6499 transitions. [2021-12-06 22:26:30,409 INFO L78 Accepts]: Start accepts. Automaton has 3796 states and 6499 transitions. Word has length 101 [2021-12-06 22:26:30,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:26:30,410 INFO L470 AbstractCegarLoop]: Abstraction has 3796 states and 6499 transitions. [2021-12-06 22:26:30,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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 22:26:30,410 INFO L276 IsEmpty]: Start isEmpty. Operand 3796 states and 6499 transitions. [2021-12-06 22:26:30,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-06 22:26:30,412 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:26:30,412 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] [2021-12-06 22:26:30,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-06 22:26:30,412 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:26:30,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:26:30,413 INFO L85 PathProgramCache]: Analyzing trace with hash 1295727739, now seen corresponding path program 1 times [2021-12-06 22:26:30,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:26:30,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286568394] [2021-12-06 22:26:30,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:26:30,413 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:26:30,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:30,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 22:26:30,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:30,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 22:26:30,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:30,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-06 22:26:30,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:30,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-06 22:26:30,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:30,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-06 22:26:30,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:30,494 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 22:26:30,495 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:26:30,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286568394] [2021-12-06 22:26:30,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286568394] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:26:30,495 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:26:30,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 22:26:30,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880130495] [2021-12-06 22:26:30,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:26:30,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 22:26:30,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:26:30,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 22:26:30,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 22:26:30,497 INFO L87 Difference]: Start difference. First operand 3796 states and 6499 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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 22:26:31,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:26:31,749 INFO L93 Difference]: Finished difference Result 8365 states and 13514 transitions. [2021-12-06 22:26:31,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 22:26:31,750 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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 101 [2021-12-06 22:26:31,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:26:31,771 INFO L225 Difference]: With dead ends: 8365 [2021-12-06 22:26:31,771 INFO L226 Difference]: Without dead ends: 6703 [2021-12-06 22:26:31,777 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-06 22:26:31,778 INFO L933 BasicCegarLoop]: 4501 mSDtfsCounter, 4733 mSDsluCounter, 16839 mSDsCounter, 0 mSdLazyCounter, 1650 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4744 SdHoareTripleChecker+Valid, 21340 SdHoareTripleChecker+Invalid, 1722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1650 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-06 22:26:31,778 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4744 Valid, 21340 Invalid, 1722 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [72 Valid, 1650 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-06 22:26:31,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6703 states. [2021-12-06 22:26:31,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6703 to 5209. [2021-12-06 22:26:31,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5209 states, 4862 states have (on average 1.6684491978609626) internal successors, (8112), 4880 states have internal predecessors, (8112), 227 states have call successors, (227), 102 states have call predecessors, (227), 118 states have return successors, (324), 242 states have call predecessors, (324), 227 states have call successors, (324) [2021-12-06 22:26:31,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5209 states to 5209 states and 8663 transitions. [2021-12-06 22:26:31,944 INFO L78 Accepts]: Start accepts. Automaton has 5209 states and 8663 transitions. Word has length 101 [2021-12-06 22:26:31,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:26:31,945 INFO L470 AbstractCegarLoop]: Abstraction has 5209 states and 8663 transitions. [2021-12-06 22:26:31,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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 22:26:31,945 INFO L276 IsEmpty]: Start isEmpty. Operand 5209 states and 8663 transitions. [2021-12-06 22:26:31,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-06 22:26:31,948 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:26:31,948 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] [2021-12-06 22:26:31,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-06 22:26:31,948 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:26:31,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:26:31,948 INFO L85 PathProgramCache]: Analyzing trace with hash 2134761401, now seen corresponding path program 1 times [2021-12-06 22:26:31,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:26:31,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889552514] [2021-12-06 22:26:31,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:26:31,949 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:26:31,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:31,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 22:26:31,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:31,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 22:26:31,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:31,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-06 22:26:32,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:32,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-06 22:26:32,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:32,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-06 22:26:32,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:32,012 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 22:26:32,012 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:26:32,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889552514] [2021-12-06 22:26:32,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889552514] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:26:32,012 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:26:32,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 22:26:32,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692073329] [2021-12-06 22:26:32,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:26:32,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 22:26:32,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:26:32,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 22:26:32,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 22:26:32,013 INFO L87 Difference]: Start difference. First operand 5209 states and 8663 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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 22:26:33,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:26:33,316 INFO L93 Difference]: Finished difference Result 13680 states and 21692 transitions. [2021-12-06 22:26:33,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 22:26:33,317 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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 101 [2021-12-06 22:26:33,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:26:33,339 INFO L225 Difference]: With dead ends: 13680 [2021-12-06 22:26:33,340 INFO L226 Difference]: Without dead ends: 10605 [2021-12-06 22:26:33,348 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-06 22:26:33,349 INFO L933 BasicCegarLoop]: 4421 mSDtfsCounter, 4825 mSDsluCounter, 16842 mSDsCounter, 0 mSdLazyCounter, 1409 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4843 SdHoareTripleChecker+Valid, 21263 SdHoareTripleChecker+Invalid, 1484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 22:26:33,349 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4843 Valid, 21263 Invalid, 1484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1409 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-06 22:26:33,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10605 states. [2021-12-06 22:26:33,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10605 to 8066. [2021-12-06 22:26:33,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8066 states, 7415 states have (on average 1.6164531355360756) internal successors, (11986), 7449 states have internal predecessors, (11986), 419 states have call successors, (419), 198 states have call predecessors, (419), 230 states have return successors, (694), 450 states have call predecessors, (694), 419 states have call successors, (694) [2021-12-06 22:26:33,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8066 states to 8066 states and 13099 transitions. [2021-12-06 22:26:33,643 INFO L78 Accepts]: Start accepts. Automaton has 8066 states and 13099 transitions. Word has length 101 [2021-12-06 22:26:33,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:26:33,643 INFO L470 AbstractCegarLoop]: Abstraction has 8066 states and 13099 transitions. [2021-12-06 22:26:33,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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 22:26:33,643 INFO L276 IsEmpty]: Start isEmpty. Operand 8066 states and 13099 transitions. [2021-12-06 22:26:33,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-06 22:26:33,648 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:26:33,648 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] [2021-12-06 22:26:33,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-06 22:26:33,648 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:26:33,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:26:33,649 INFO L85 PathProgramCache]: Analyzing trace with hash -2133140293, now seen corresponding path program 1 times [2021-12-06 22:26:33,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:26:33,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584472202] [2021-12-06 22:26:33,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:26:33,649 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:26:33,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:33,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 22:26:33,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:33,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 22:26:33,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:33,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-06 22:26:33,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:33,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-06 22:26:33,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:33,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-06 22:26:33,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:33,715 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 22:26:33,716 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:26:33,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584472202] [2021-12-06 22:26:33,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584472202] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:26:33,716 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:26:33,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 22:26:33,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637131476] [2021-12-06 22:26:33,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:26:33,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 22:26:33,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:26:33,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 22:26:33,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 22:26:33,718 INFO L87 Difference]: Start difference. First operand 8066 states and 13099 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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 22:26:35,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:26:35,412 INFO L93 Difference]: Finished difference Result 24119 states and 37970 transitions. [2021-12-06 22:26:35,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 22:26:35,413 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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 101 [2021-12-06 22:26:35,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:26:35,454 INFO L225 Difference]: With dead ends: 24119 [2021-12-06 22:26:35,454 INFO L226 Difference]: Without dead ends: 18187 [2021-12-06 22:26:35,473 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-06 22:26:35,474 INFO L933 BasicCegarLoop]: 4414 mSDtfsCounter, 4788 mSDsluCounter, 16842 mSDsCounter, 0 mSdLazyCounter, 1398 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4806 SdHoareTripleChecker+Valid, 21256 SdHoareTripleChecker+Invalid, 1476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 1398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-06 22:26:35,474 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4806 Valid, 21256 Invalid, 1476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 1398 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-06 22:26:35,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18187 states. [2021-12-06 22:26:36,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18187 to 13763. [2021-12-06 22:26:36,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13763 states, 12520 states have (on average 1.5773162939297125) internal successors, (19748), 12586 states have internal predecessors, (19748), 787 states have call successors, (787), 390 states have call predecessors, (787), 454 states have return successors, (1580), 850 states have call predecessors, (1580), 787 states have call successors, (1580) [2021-12-06 22:26:36,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13763 states to 13763 states and 22115 transitions. [2021-12-06 22:26:36,041 INFO L78 Accepts]: Start accepts. Automaton has 13763 states and 22115 transitions. Word has length 101 [2021-12-06 22:26:36,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:26:36,042 INFO L470 AbstractCegarLoop]: Abstraction has 13763 states and 22115 transitions. [2021-12-06 22:26:36,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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 22:26:36,042 INFO L276 IsEmpty]: Start isEmpty. Operand 13763 states and 22115 transitions. [2021-12-06 22:26:36,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-06 22:26:36,049 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:26:36,050 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:26:36,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-06 22:26:36,050 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:26:36,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:26:36,050 INFO L85 PathProgramCache]: Analyzing trace with hash 84490105, now seen corresponding path program 1 times [2021-12-06 22:26:36,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:26:36,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166125185] [2021-12-06 22:26:36,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:26:36,051 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:26:36,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:36,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 22:26:36,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:36,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 22:26:36,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:36,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-06 22:26:36,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:36,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-06 22:26:36,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:36,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-06 22:26:36,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:36,115 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 22:26:36,115 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:26:36,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166125185] [2021-12-06 22:26:36,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166125185] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:26:36,115 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:26:36,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 22:26:36,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134536687] [2021-12-06 22:26:36,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:26:36,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 22:26:36,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:26:36,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 22:26:36,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-06 22:26:36,117 INFO L87 Difference]: Start difference. First operand 13763 states and 22115 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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 22:26:37,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:26:37,245 INFO L93 Difference]: Finished difference Result 28419 states and 45536 transitions. [2021-12-06 22:26:37,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 22:26:37,246 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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 101 [2021-12-06 22:26:37,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:26:37,281 INFO L225 Difference]: With dead ends: 28419 [2021-12-06 22:26:37,281 INFO L226 Difference]: Without dead ends: 16790 [2021-12-06 22:26:37,308 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-06 22:26:37,308 INFO L933 BasicCegarLoop]: 4241 mSDtfsCounter, 4584 mSDsluCounter, 12253 mSDsCounter, 0 mSdLazyCounter, 591 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4597 SdHoareTripleChecker+Valid, 16494 SdHoareTripleChecker+Invalid, 681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 22:26:37,309 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4597 Valid, 16494 Invalid, 681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 591 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 22:26:37,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16790 states. [2021-12-06 22:26:37,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16790 to 13763. [2021-12-06 22:26:37,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13763 states, 12520 states have (on average 1.5721246006389777) internal successors, (19683), 12586 states have internal predecessors, (19683), 787 states have call successors, (787), 390 states have call predecessors, (787), 454 states have return successors, (1580), 850 states have call predecessors, (1580), 787 states have call successors, (1580) [2021-12-06 22:26:37,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13763 states to 13763 states and 22050 transitions. [2021-12-06 22:26:37,897 INFO L78 Accepts]: Start accepts. Automaton has 13763 states and 22050 transitions. Word has length 101 [2021-12-06 22:26:37,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:26:37,897 INFO L470 AbstractCegarLoop]: Abstraction has 13763 states and 22050 transitions. [2021-12-06 22:26:37,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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 22:26:37,897 INFO L276 IsEmpty]: Start isEmpty. Operand 13763 states and 22050 transitions. [2021-12-06 22:26:37,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-06 22:26:37,903 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:26:37,904 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:26:37,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-06 22:26:37,904 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:26:37,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:26:37,904 INFO L85 PathProgramCache]: Analyzing trace with hash 971712951, now seen corresponding path program 1 times [2021-12-06 22:26:37,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:26:37,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541682777] [2021-12-06 22:26:37,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:26:37,904 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:26:37,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:37,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 22:26:37,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:37,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 22:26:37,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:37,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-06 22:26:37,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:37,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-06 22:26:37,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:37,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-06 22:26:37,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:37,965 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 22:26:37,965 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:26:37,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541682777] [2021-12-06 22:26:37,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541682777] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:26:37,965 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:26:37,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 22:26:37,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144095955] [2021-12-06 22:26:37,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:26:37,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 22:26:37,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:26:37,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 22:26:37,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-06 22:26:37,966 INFO L87 Difference]: Start difference. First operand 13763 states and 22050 transitions. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 4 states have internal predecessors, (91), 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 22:26:39,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:26:39,804 INFO L93 Difference]: Finished difference Result 35650 states and 55980 transitions. [2021-12-06 22:26:39,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 22:26:39,805 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 4 states have internal predecessors, (91), 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 101 [2021-12-06 22:26:39,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:26:39,849 INFO L225 Difference]: With dead ends: 35650 [2021-12-06 22:26:39,849 INFO L226 Difference]: Without dead ends: 24022 [2021-12-06 22:26:39,872 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-12-06 22:26:39,872 INFO L933 BasicCegarLoop]: 4553 mSDtfsCounter, 4911 mSDsluCounter, 12518 mSDsCounter, 0 mSdLazyCounter, 1145 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4943 SdHoareTripleChecker+Valid, 17071 SdHoareTripleChecker+Invalid, 1244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 1145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 22:26:39,872 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4943 Valid, 17071 Invalid, 1244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 1145 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-06 22:26:39,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24022 states. [2021-12-06 22:26:40,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24022 to 19599. [2021-12-06 22:26:40,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19599 states, 17711 states have (on average 1.5459319067246344) internal successors, (27380), 17842 states have internal predecessors, (27380), 1202 states have call successors, (1202), 588 states have call predecessors, (1202), 684 states have return successors, (2239), 1232 states have call predecessors, (2239), 1202 states have call successors, (2239) [2021-12-06 22:26:40,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19599 states to 19599 states and 30821 transitions. [2021-12-06 22:26:40,715 INFO L78 Accepts]: Start accepts. Automaton has 19599 states and 30821 transitions. Word has length 101 [2021-12-06 22:26:40,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:26:40,715 INFO L470 AbstractCegarLoop]: Abstraction has 19599 states and 30821 transitions. [2021-12-06 22:26:40,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 4 states have internal predecessors, (91), 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 22:26:40,715 INFO L276 IsEmpty]: Start isEmpty. Operand 19599 states and 30821 transitions. [2021-12-06 22:26:40,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-12-06 22:26:40,749 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:26:40,749 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:26:40,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-06 22:26:40,749 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:26:40,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:26:40,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1967377923, now seen corresponding path program 1 times [2021-12-06 22:26:40,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:26:40,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913191136] [2021-12-06 22:26:40,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:26:40,750 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:26:40,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:40,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 22:26:40,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:40,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 22:26:40,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:40,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-06 22:26:40,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:40,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-06 22:26:40,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:40,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-06 22:26:40,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:40,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-06 22:26:40,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:40,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-06 22:26:40,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:40,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2021-12-06 22:26:40,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:40,860 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-06 22:26:40,860 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:26:40,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913191136] [2021-12-06 22:26:40,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913191136] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:26:40,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652195537] [2021-12-06 22:26:40,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:26:40,861 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:26:40,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70894f2-3652-4c16-b5dd-1236c8d50bab/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:26:40,862 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70894f2-3652-4c16-b5dd-1236c8d50bab/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:26:40,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70894f2-3652-4c16-b5dd-1236c8d50bab/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 22:26:40,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:40,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 662 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-06 22:26:40,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:26:41,103 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-06 22:26:41,103 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 22:26:41,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652195537] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:26:41,103 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 22:26:41,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-06 22:26:41,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869883367] [2021-12-06 22:26:41,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:26:41,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 22:26:41,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:26:41,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 22:26:41,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-06 22:26:41,104 INFO L87 Difference]: Start difference. First operand 19599 states and 30821 transitions. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 2 states have internal predecessors, (134), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-06 22:26:42,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:26:42,515 INFO L93 Difference]: Finished difference Result 54180 states and 84505 transitions. [2021-12-06 22:26:42,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 22:26:42,516 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 2 states have internal predecessors, (134), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 164 [2021-12-06 22:26:42,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:26:42,604 INFO L225 Difference]: With dead ends: 54180 [2021-12-06 22:26:42,604 INFO L226 Difference]: Without dead ends: 36716 [2021-12-06 22:26:42,640 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-06 22:26:42,641 INFO L933 BasicCegarLoop]: 4316 mSDtfsCounter, 4190 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4190 SdHoareTripleChecker+Valid, 4589 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:26:42,641 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4190 Valid, 4589 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:26:42,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36716 states. [2021-12-06 22:26:44,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36716 to 36518. [2021-12-06 22:26:44,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36518 states, 32798 states have (on average 1.5244527105311299) internal successors, (49999), 33058 states have internal predecessors, (49999), 2350 states have call successors, (2350), 1176 states have call predecessors, (2350), 1368 states have return successors, (4361), 2347 states have call predecessors, (4361), 2350 states have call successors, (4361) [2021-12-06 22:26:44,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36518 states to 36518 states and 56710 transitions. [2021-12-06 22:26:44,158 INFO L78 Accepts]: Start accepts. Automaton has 36518 states and 56710 transitions. Word has length 164 [2021-12-06 22:26:44,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:26:44,158 INFO L470 AbstractCegarLoop]: Abstraction has 36518 states and 56710 transitions. [2021-12-06 22:26:44,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 2 states have internal predecessors, (134), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-06 22:26:44,158 INFO L276 IsEmpty]: Start isEmpty. Operand 36518 states and 56710 transitions. [2021-12-06 22:26:44,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-12-06 22:26:44,200 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:26:44,200 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:26:44,221 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70894f2-3652-4c16-b5dd-1236c8d50bab/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 22:26:44,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70894f2-3652-4c16-b5dd-1236c8d50bab/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:26:44,402 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:26:44,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:26:44,403 INFO L85 PathProgramCache]: Analyzing trace with hash -1308854563, now seen corresponding path program 1 times [2021-12-06 22:26:44,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:26:44,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533286149] [2021-12-06 22:26:44,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:26:44,405 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:26:44,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:44,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 22:26:44,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:44,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 22:26:44,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:44,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-06 22:26:44,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:44,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-06 22:26:44,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:44,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-06 22:26:44,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:44,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-06 22:26:44,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:44,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-06 22:26:44,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:44,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2021-12-06 22:26:44,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:44,503 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-06 22:26:44,503 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:26:44,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533286149] [2021-12-06 22:26:44,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533286149] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:26:44,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529276534] [2021-12-06 22:26:44,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:26:44,503 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:26:44,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70894f2-3652-4c16-b5dd-1236c8d50bab/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:26:44,504 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70894f2-3652-4c16-b5dd-1236c8d50bab/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:26:44,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70894f2-3652-4c16-b5dd-1236c8d50bab/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 22:26:44,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:44,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 656 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-06 22:26:44,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:26:44,745 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-06 22:26:44,745 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 22:26:44,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529276534] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:26:44,746 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 22:26:44,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-06 22:26:44,746 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411175172] [2021-12-06 22:26:44,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:26:44,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 22:26:44,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:26:44,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 22:26:44,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-06 22:26:44,748 INFO L87 Difference]: Start difference. First operand 36518 states and 56710 transitions. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 2 states have internal predecessors, (116), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-06 22:26:47,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:26:47,516 INFO L93 Difference]: Finished difference Result 104591 states and 162188 transitions. [2021-12-06 22:26:47,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 22:26:47,517 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 2 states have internal predecessors, (116), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 164 [2021-12-06 22:26:47,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:26:47,693 INFO L225 Difference]: With dead ends: 104591 [2021-12-06 22:26:47,693 INFO L226 Difference]: Without dead ends: 70208 [2021-12-06 22:26:47,761 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-06 22:26:47,761 INFO L933 BasicCegarLoop]: 4316 mSDtfsCounter, 4208 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4208 SdHoareTripleChecker+Valid, 4589 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:26:47,762 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4208 Valid, 4589 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:26:47,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70208 states. [2021-12-06 22:26:50,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70208 to 69814. [2021-12-06 22:26:50,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69814 states, 62480 states have (on average 1.5116997439180537) internal successors, (94451), 62998 states have internal predecessors, (94451), 4596 states have call successors, (4596), 2352 states have call predecessors, (4596), 2736 states have return successors, (8555), 4527 states have call predecessors, (8555), 4596 states have call successors, (8555) [2021-12-06 22:26:50,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69814 states to 69814 states and 107602 transitions. [2021-12-06 22:26:50,786 INFO L78 Accepts]: Start accepts. Automaton has 69814 states and 107602 transitions. Word has length 164 [2021-12-06 22:26:50,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:26:50,786 INFO L470 AbstractCegarLoop]: Abstraction has 69814 states and 107602 transitions. [2021-12-06 22:26:50,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 2 states have internal predecessors, (116), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-06 22:26:50,786 INFO L276 IsEmpty]: Start isEmpty. Operand 69814 states and 107602 transitions. [2021-12-06 22:26:50,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-12-06 22:26:50,849 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:26:50,850 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:26:50,870 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70894f2-3652-4c16-b5dd-1236c8d50bab/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 22:26:51,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70894f2-3652-4c16-b5dd-1236c8d50bab/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-06 22:26:51,051 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:26:51,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:26:51,053 INFO L85 PathProgramCache]: Analyzing trace with hash -1068940355, now seen corresponding path program 1 times [2021-12-06 22:26:51,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:26:51,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400185184] [2021-12-06 22:26:51,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:26:51,054 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:26:51,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:51,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 22:26:51,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:51,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 22:26:51,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:51,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-06 22:26:51,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:51,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-06 22:26:51,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:51,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-06 22:26:51,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:51,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-06 22:26:51,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:51,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-06 22:26:51,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:51,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2021-12-06 22:26:51,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:51,169 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-06 22:26:51,169 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:26:51,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400185184] [2021-12-06 22:26:51,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400185184] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:26:51,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824621979] [2021-12-06 22:26:51,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:26:51,170 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:26:51,170 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70894f2-3652-4c16-b5dd-1236c8d50bab/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:26:51,171 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70894f2-3652-4c16-b5dd-1236c8d50bab/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:26:51,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70894f2-3652-4c16-b5dd-1236c8d50bab/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 22:26:51,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:51,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 650 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-06 22:26:51,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:26:51,396 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-06 22:26:51,396 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 22:26:51,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824621979] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:26:51,396 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 22:26:51,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-06 22:26:51,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233413827] [2021-12-06 22:26:51,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:26:51,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 22:26:51,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:26:51,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 22:26:51,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-06 22:26:51,397 INFO L87 Difference]: Start difference. First operand 69814 states and 107602 transitions. Second operand has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 2 states have internal predecessors, (122), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-06 22:26:56,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:26:56,866 INFO L93 Difference]: Finished difference Result 203211 states and 313886 transitions. [2021-12-06 22:26:56,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 22:26:56,867 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 2 states have internal predecessors, (122), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 164 [2021-12-06 22:26:56,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:26:57,235 INFO L225 Difference]: With dead ends: 203211 [2021-12-06 22:26:57,235 INFO L226 Difference]: Without dead ends: 135532 [2021-12-06 22:26:57,366 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-06 22:26:57,367 INFO L933 BasicCegarLoop]: 4272 mSDtfsCounter, 4202 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4202 SdHoareTripleChecker+Valid, 4545 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:26:57,367 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4202 Valid, 4545 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:26:57,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135532 states. [2021-12-06 22:27:03,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135532 to 134746. [2021-12-06 22:27:03,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134746 states, 120476 states have (on average 1.5056857797403633) internal successors, (181399), 121510 states have internal predecessors, (181399), 8796 states have call successors, (8796), 4704 states have call predecessors, (8796), 5472 states have return successors, (16651), 8595 states have call predecessors, (16651), 8796 states have call successors, (16651) [2021-12-06 22:27:03,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134746 states to 134746 states and 206846 transitions. [2021-12-06 22:27:03,730 INFO L78 Accepts]: Start accepts. Automaton has 134746 states and 206846 transitions. Word has length 164 [2021-12-06 22:27:03,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:27:03,731 INFO L470 AbstractCegarLoop]: Abstraction has 134746 states and 206846 transitions. [2021-12-06 22:27:03,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 2 states have internal predecessors, (122), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-06 22:27:03,731 INFO L276 IsEmpty]: Start isEmpty. Operand 134746 states and 206846 transitions. [2021-12-06 22:27:03,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-12-06 22:27:03,858 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:27:03,858 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:27:03,881 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70894f2-3652-4c16-b5dd-1236c8d50bab/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-06 22:27:04,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70894f2-3652-4c16-b5dd-1236c8d50bab/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-06 22:27:04,060 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:27:04,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:27:04,061 INFO L85 PathProgramCache]: Analyzing trace with hash -2014758755, now seen corresponding path program 1 times [2021-12-06 22:27:04,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:27:04,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270628204] [2021-12-06 22:27:04,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:27:04,063 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:27:04,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:27:04,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 22:27:04,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:27:04,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 22:27:04,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:27:04,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-06 22:27:04,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:27:04,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-06 22:27:04,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:27:04,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-06 22:27:04,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:27:04,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-06 22:27:04,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:27:04,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-06 22:27:04,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:27:04,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2021-12-06 22:27:04,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:27:04,186 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-06 22:27:04,187 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:27:04,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270628204] [2021-12-06 22:27:04,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270628204] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:27:04,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664515086] [2021-12-06 22:27:04,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:27:04,187 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:27:04,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70894f2-3652-4c16-b5dd-1236c8d50bab/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:27:04,188 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70894f2-3652-4c16-b5dd-1236c8d50bab/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:27:04,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70894f2-3652-4c16-b5dd-1236c8d50bab/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 22:27:04,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:27:04,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 644 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-06 22:27:04,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:27:04,417 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-12-06 22:27:04,417 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 22:27:04,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664515086] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:27:04,417 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 22:27:04,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-06 22:27:04,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806421979] [2021-12-06 22:27:04,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:27:04,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 22:27:04,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:27:04,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 22:27:04,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-06 22:27:04,418 INFO L87 Difference]: Start difference. First operand 134746 states and 206846 transitions. Second operand has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-06 22:27:15,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:27:15,508 INFO L93 Difference]: Finished difference Result 396021 states and 612647 transitions. [2021-12-06 22:27:15,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 22:27:15,509 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 164 [2021-12-06 22:27:15,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:27:16,342 INFO L225 Difference]: With dead ends: 396021 [2021-12-06 22:27:16,342 INFO L226 Difference]: Without dead ends: 263411 [2021-12-06 22:27:16,565 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-06 22:27:16,566 INFO L933 BasicCegarLoop]: 4538 mSDtfsCounter, 270 mSDsluCounter, 4260 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 8798 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:27:16,566 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [270 Valid, 8798 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:27:16,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263411 states. [2021-12-06 22:27:28,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263411 to 263411. [2021-12-06 22:27:28,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263411 states, 235402 states have (on average 1.497561617998148) internal successors, (352529), 237205 states have internal predecessors, (352529), 17063 states have call successors, (17063), 9408 states have call predecessors, (17063), 10944 states have return successors, (36334), 16925 states have call predecessors, (36334), 17063 states have call successors, (36334) [2021-12-06 22:27:29,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263411 states to 263411 states and 405926 transitions. [2021-12-06 22:27:29,391 INFO L78 Accepts]: Start accepts. Automaton has 263411 states and 405926 transitions. Word has length 164 [2021-12-06 22:27:29,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:27:29,391 INFO L470 AbstractCegarLoop]: Abstraction has 263411 states and 405926 transitions. [2021-12-06 22:27:29,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-06 22:27:29,391 INFO L276 IsEmpty]: Start isEmpty. Operand 263411 states and 405926 transitions. [2021-12-06 22:27:30,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2021-12-06 22:27:30,028 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:27:30,028 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:27:30,052 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70894f2-3652-4c16-b5dd-1236c8d50bab/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-06 22:27:30,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70894f2-3652-4c16-b5dd-1236c8d50bab/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-06 22:27:30,230 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:27:30,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:27:30,231 INFO L85 PathProgramCache]: Analyzing trace with hash -636315433, now seen corresponding path program 1 times [2021-12-06 22:27:30,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:27:30,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587388877] [2021-12-06 22:27:30,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:27:30,233 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:27:30,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:27:30,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 22:27:30,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:27:30,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 22:27:30,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:27:30,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-06 22:27:30,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:27:30,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-06 22:27:30,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:27:30,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-06 22:27:30,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:27:30,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-06 22:27:30,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:27:30,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-06 22:27:30,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:27:30,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2021-12-06 22:27:30,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:27:30,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-06 22:27:30,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:27:30,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 200 [2021-12-06 22:27:30,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:27:30,329 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-12-06 22:27:30,329 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:27:30,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587388877] [2021-12-06 22:27:30,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587388877] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:27:30,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999965115] [2021-12-06 22:27:30,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:27:30,330 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:27:30,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70894f2-3652-4c16-b5dd-1236c8d50bab/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:27:30,331 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70894f2-3652-4c16-b5dd-1236c8d50bab/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:27:30,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70894f2-3652-4c16-b5dd-1236c8d50bab/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 22:27:30,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:27:30,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 801 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-06 22:27:30,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:27:30,620 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-12-06 22:27:30,620 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 22:27:30,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999965115] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:27:30,621 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 22:27:30,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-06 22:27:30,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8321753] [2021-12-06 22:27:30,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:27:30,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 22:27:30,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:27:30,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 22:27:30,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-06 22:27:30,622 INFO L87 Difference]: Start difference. First operand 263411 states and 405926 transitions. Second operand has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 2 states have internal predecessors, (157), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-06 22:27:52,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:27:52,354 INFO L93 Difference]: Finished difference Result 777673 states and 1205965 transitions. [2021-12-06 22:27:52,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 22:27:52,355 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 2 states have internal predecessors, (157), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 214 [2021-12-06 22:27:52,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:27:54,200 INFO L225 Difference]: With dead ends: 777673 [2021-12-06 22:27:54,200 INFO L226 Difference]: Without dead ends: 516405 [2021-12-06 22:27:54,896 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-06 22:27:54,896 INFO L933 BasicCegarLoop]: 4272 mSDtfsCounter, 4139 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4139 SdHoareTripleChecker+Valid, 4545 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:27:54,896 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4139 Valid, 4545 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:27:55,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516405 states. [2021-12-06 22:28:18,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516405 to 513267. [2021-12-06 22:28:18,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 513267 states, 459114 states have (on average 1.4959617872685216) internal successors, (686817), 462717 states have internal predecessors, (686817), 32407 states have call successors, (32407), 18672 states have call predecessors, (32407), 21744 states have return successors, (69930), 32005 states have call predecessors, (69930), 32407 states have call successors, (69930) [2021-12-06 22:28:20,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513267 states to 513267 states and 789154 transitions. [2021-12-06 22:28:20,448 INFO L78 Accepts]: Start accepts. Automaton has 513267 states and 789154 transitions. Word has length 214 [2021-12-06 22:28:20,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:28:20,449 INFO L470 AbstractCegarLoop]: Abstraction has 513267 states and 789154 transitions. [2021-12-06 22:28:20,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 2 states have internal predecessors, (157), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-06 22:28:20,449 INFO L276 IsEmpty]: Start isEmpty. Operand 513267 states and 789154 transitions. [2021-12-06 22:28:21,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2021-12-06 22:28:21,702 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:28:21,702 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:28:21,725 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70894f2-3652-4c16-b5dd-1236c8d50bab/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-06 22:28:21,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70894f2-3652-4c16-b5dd-1236c8d50bab/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-06 22:28:21,904 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:28:21,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:28:21,905 INFO L85 PathProgramCache]: Analyzing trace with hash -112899485, now seen corresponding path program 1 times [2021-12-06 22:28:21,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:28:21,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519316004] [2021-12-06 22:28:21,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:28:21,907 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:28:22,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:28:22,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 22:28:22,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:28:22,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 22:28:22,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:28:22,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-06 22:28:22,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:28:22,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-06 22:28:22,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:28:22,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-06 22:28:22,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:28:22,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-06 22:28:22,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:28:22,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-06 22:28:22,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:28:22,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2021-12-06 22:28:22,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:28:22,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-06 22:28:22,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:28:22,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 200 [2021-12-06 22:28:22,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:28:22,141 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-12-06 22:28:22,141 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:28:22,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519316004] [2021-12-06 22:28:22,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519316004] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:28:22,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804635034] [2021-12-06 22:28:22,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:28:22,142 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:28:22,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70894f2-3652-4c16-b5dd-1236c8d50bab/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:28:22,143 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70894f2-3652-4c16-b5dd-1236c8d50bab/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:28:22,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70894f2-3652-4c16-b5dd-1236c8d50bab/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 22:28:22,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:28:22,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 801 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-06 22:28:22,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:28:22,432 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-12-06 22:28:22,433 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 22:28:22,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804635034] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:28:22,433 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 22:28:22,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-06 22:28:22,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412212503] [2021-12-06 22:28:22,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:28:22,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 22:28:22,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:28:22,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 22:28:22,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-06 22:28:22,434 INFO L87 Difference]: Start difference. First operand 513267 states and 789154 transitions. Second operand has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 2 states have internal predecessors, (157), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-06 22:29:06,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:29:06,489 INFO L93 Difference]: Finished difference Result 1524003 states and 2359345 transitions. [2021-12-06 22:29:06,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 22:29:06,490 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 2 states have internal predecessors, (157), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 214 [2021-12-06 22:29:06,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:29:10,112 INFO L225 Difference]: With dead ends: 1524003 [2021-12-06 22:29:10,112 INFO L226 Difference]: Without dead ends: 1012879 [2021-12-06 22:29:11,686 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-06 22:29:11,687 INFO L933 BasicCegarLoop]: 4282 mSDtfsCounter, 4142 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4142 SdHoareTripleChecker+Valid, 4555 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:29:11,687 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4142 Valid, 4555 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:29:12,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1012879 states. [2021-12-06 22:29:59,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1012879 to 1006605. [2021-12-06 22:30:00,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1006605 states, 900200 states have (on average 1.4933914685625416) internal successors, (1344351), 907403 states have internal predecessors, (1344351), 63061 states have call successors, (63061), 37198 states have call predecessors, (63061), 43342 states have return successors, (137070), 62131 states have call predecessors, (137070), 63061 states have call successors, (137070) [2021-12-06 22:30:05,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1006605 states to 1006605 states and 1544482 transitions. [2021-12-06 22:30:05,540 INFO L78 Accepts]: Start accepts. Automaton has 1006605 states and 1544482 transitions. Word has length 214 [2021-12-06 22:30:05,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:30:05,541 INFO L470 AbstractCegarLoop]: Abstraction has 1006605 states and 1544482 transitions. [2021-12-06 22:30:05,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 2 states have internal predecessors, (157), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-06 22:30:05,541 INFO L276 IsEmpty]: Start isEmpty. Operand 1006605 states and 1544482 transitions. [2021-12-06 22:30:08,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2021-12-06 22:30:08,830 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:30:08,830 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:30:08,854 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70894f2-3652-4c16-b5dd-1236c8d50bab/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-06 22:30:09,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70894f2-3652-4c16-b5dd-1236c8d50bab/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:30:09,032 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:30:09,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:30:09,033 INFO L85 PathProgramCache]: Analyzing trace with hash -348265841, now seen corresponding path program 1 times [2021-12-06 22:30:09,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:30:09,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320587032] [2021-12-06 22:30:09,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:30:09,035 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:30:09,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:30:09,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 22:30:09,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:30:09,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 22:30:09,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:30:09,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-06 22:30:09,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:30:09,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-06 22:30:09,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:30:09,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-06 22:30:09,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:30:09,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2021-12-06 22:30:09,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:30:09,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-06 22:30:09,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:30:09,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-06 22:30:09,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:30:09,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2021-12-06 22:30:09,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:30:09,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-06 22:30:09,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:30:09,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 220 [2021-12-06 22:30:09,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:30:09,354 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2021-12-06 22:30:09,354 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:30:09,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320587032] [2021-12-06 22:30:09,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320587032] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:30:09,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068474694] [2021-12-06 22:30:09,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:30:09,354 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:30:09,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70894f2-3652-4c16-b5dd-1236c8d50bab/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:30:09,355 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70894f2-3652-4c16-b5dd-1236c8d50bab/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:30:09,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70894f2-3652-4c16-b5dd-1236c8d50bab/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-06 22:30:09,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:30:09,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 842 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 22:30:09,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:30:09,622 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 141 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-06 22:30:09,622 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 22:30:09,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068474694] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:30:09,623 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 22:30:09,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-06 22:30:09,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516588114] [2021-12-06 22:30:09,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:30:09,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 22:30:09,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:30:09,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 22:30:09,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-06 22:30:09,624 INFO L87 Difference]: Start difference. First operand 1006605 states and 1544482 transitions. Second operand has 3 states, 3 states have (on average 67.33333333333333) internal successors, (202), 3 states have internal predecessors, (202), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-06 22:30:54,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:30:54,638 INFO L93 Difference]: Finished difference Result 1581247 states and 2445590 transitions. [2021-12-06 22:30:54,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 22:30:54,639 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 67.33333333333333) internal successors, (202), 3 states have internal predecessors, (202), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 234 [2021-12-06 22:30:54,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:30:57,870 INFO L225 Difference]: With dead ends: 1581247 [2021-12-06 22:30:57,871 INFO L226 Difference]: Without dead ends: 888907 [2021-12-06 22:30:59,505 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 255 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-06 22:30:59,506 INFO L933 BasicCegarLoop]: 4267 mSDtfsCounter, 4173 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4173 SdHoareTripleChecker+Valid, 4357 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:30:59,506 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4173 Valid, 4357 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:31:00,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 888907 states. [2021-12-06 22:31:44,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 888907 to 886369. [2021-12-06 22:31:44,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 886369 states, 794660 states have (on average 1.4739121133566557) internal successors, (1171259), 800087 states have internal predecessors, (1171259), 53681 states have call successors, (53681), 33418 states have call predecessors, (53681), 38026 states have return successors, (110353), 52927 states have call predecessors, (110353), 53681 states have call successors, (110353) [2021-12-06 22:31:48,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 886369 states to 886369 states and 1335293 transitions. [2021-12-06 22:31:48,743 INFO L78 Accepts]: Start accepts. Automaton has 886369 states and 1335293 transitions. Word has length 234 [2021-12-06 22:31:48,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:31:48,744 INFO L470 AbstractCegarLoop]: Abstraction has 886369 states and 1335293 transitions. [2021-12-06 22:31:48,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.33333333333333) internal successors, (202), 3 states have internal predecessors, (202), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-06 22:31:48,744 INFO L276 IsEmpty]: Start isEmpty. Operand 886369 states and 1335293 transitions. [2021-12-06 22:31:50,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2021-12-06 22:31:50,984 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:31:50,984 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:31:51,006 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70894f2-3652-4c16-b5dd-1236c8d50bab/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-06 22:31:51,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70894f2-3652-4c16-b5dd-1236c8d50bab/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:31:51,185 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:31:51,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:31:51,186 INFO L85 PathProgramCache]: Analyzing trace with hash 1471460078, now seen corresponding path program 1 times [2021-12-06 22:31:51,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:31:51,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130719198] [2021-12-06 22:31:51,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:31:51,186 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:31:51,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:31:51,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 22:31:51,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:31:51,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 22:31:51,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:31:51,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-06 22:31:51,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:31:51,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-06 22:31:51,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:31:51,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-06 22:31:51,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:31:51,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2021-12-06 22:31:51,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:31:51,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-06 22:31:51,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:31:51,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-06 22:31:51,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:31:51,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2021-12-06 22:31:51,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:31:51,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-06 22:31:51,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:31:51,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 220 [2021-12-06 22:31:51,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:31:51,296 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2021-12-06 22:31:51,296 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:31:51,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130719198] [2021-12-06 22:31:51,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130719198] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:31:51,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771223482] [2021-12-06 22:31:51,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:31:51,296 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:31:51,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70894f2-3652-4c16-b5dd-1236c8d50bab/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:31:51,297 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70894f2-3652-4c16-b5dd-1236c8d50bab/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:31:51,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70894f2-3652-4c16-b5dd-1236c8d50bab/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-06 22:31:51,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:31:51,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 839 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 22:31:51,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:31:51,598 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 96 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-12-06 22:31:51,598 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 22:31:51,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771223482] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:31:51,598 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 22:31:51,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-06 22:31:51,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40545675] [2021-12-06 22:31:51,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:31:51,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 22:31:51,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:31:51,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 22:31:51,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-06 22:31:51,600 INFO L87 Difference]: Start difference. First operand 886369 states and 1335293 transitions. Second operand has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9)