./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/bitvector/byte_add_1-1.i --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_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/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_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/bitvector/byte_add_1-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/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_7d49c5aa-baf6-441d-8815-1cb34b50426c/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 0ba3e3db8f44a5e9ad151b8422bee8deebac1dcf47a42cba5485daeafd8d8e80 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 23:25:14,387 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 23:25:14,388 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 23:25:14,419 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 23:25:14,420 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 23:25:14,421 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 23:25:14,423 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 23:25:14,425 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 23:25:14,427 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 23:25:14,429 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 23:25:14,430 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 23:25:14,431 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 23:25:14,432 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 23:25:14,433 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 23:25:14,434 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 23:25:14,436 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 23:25:14,437 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 23:25:14,438 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 23:25:14,440 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 23:25:14,443 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 23:25:14,445 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 23:25:14,446 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 23:25:14,448 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 23:25:14,449 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 23:25:14,452 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 23:25:14,453 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 23:25:14,453 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 23:25:14,454 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 23:25:14,455 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 23:25:14,456 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 23:25:14,456 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 23:25:14,457 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 23:25:14,458 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 23:25:14,459 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 23:25:14,460 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 23:25:14,460 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 23:25:14,461 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 23:25:14,461 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 23:25:14,462 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 23:25:14,462 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 23:25:14,463 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 23:25:14,464 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 23:25:14,489 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 23:25:14,489 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 23:25:14,489 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 23:25:14,489 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 23:25:14,490 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 23:25:14,490 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 23:25:14,491 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 23:25:14,491 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 23:25:14,491 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 23:25:14,491 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 23:25:14,492 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 23:25:14,492 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 23:25:14,492 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 23:25:14,492 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 23:25:14,492 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 23:25:14,492 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 23:25:14,500 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 23:25:14,500 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 23:25:14,500 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 23:25:14,500 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 23:25:14,500 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 23:25:14,501 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 23:25:14,501 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 23:25:14,501 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 23:25:14,501 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 23:25:14,501 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 23:25:14,502 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 23:25:14,502 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 23:25:14,502 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 23:25:14,502 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 23:25:14,502 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 23:25:14,502 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 23:25:14,503 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 23:25:14,503 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 23:25:14,503 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_7d49c5aa-baf6-441d-8815-1cb34b50426c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0ba3e3db8f44a5e9ad151b8422bee8deebac1dcf47a42cba5485daeafd8d8e80 [2021-12-06 23:25:14,682 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 23:25:14,697 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 23:25:14,699 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 23:25:14,700 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 23:25:14,700 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 23:25:14,701 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/bitvector/byte_add_1-1.i [2021-12-06 23:25:14,742 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/data/cdd9c2dff/a4e78a7626dd47a092dee73c7097776d/FLAG715d15235 [2021-12-06 23:25:15,128 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 23:25:15,128 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/sv-benchmarks/c/bitvector/byte_add_1-1.i [2021-12-06 23:25:15,135 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/data/cdd9c2dff/a4e78a7626dd47a092dee73c7097776d/FLAG715d15235 [2021-12-06 23:25:15,145 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/data/cdd9c2dff/a4e78a7626dd47a092dee73c7097776d [2021-12-06 23:25:15,147 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 23:25:15,148 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 23:25:15,149 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 23:25:15,149 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 23:25:15,151 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 23:25:15,152 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 11:25:15" (1/1) ... [2021-12-06 23:25:15,153 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1dce8243 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:25:15, skipping insertion in model container [2021-12-06 23:25:15,153 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 11:25:15" (1/1) ... [2021-12-06 23:25:15,158 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 23:25:15,173 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 23:25:15,292 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_7d49c5aa-baf6-441d-8815-1cb34b50426c/sv-benchmarks/c/bitvector/byte_add_1-1.i[1168,1181] [2021-12-06 23:25:15,317 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 23:25:15,323 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 23:25:15,332 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_7d49c5aa-baf6-441d-8815-1cb34b50426c/sv-benchmarks/c/bitvector/byte_add_1-1.i[1168,1181] [2021-12-06 23:25:15,346 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 23:25:15,355 INFO L208 MainTranslator]: Completed translation [2021-12-06 23:25:15,356 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:25:15 WrapperNode [2021-12-06 23:25:15,356 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 23:25:15,357 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 23:25:15,357 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 23:25:15,357 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 23:25:15,362 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:25:15" (1/1) ... [2021-12-06 23:25:15,368 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:25:15" (1/1) ... [2021-12-06 23:25:15,386 INFO L137 Inliner]: procedures = 16, calls = 8, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 123 [2021-12-06 23:25:15,386 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 23:25:15,387 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 23:25:15,387 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 23:25:15,387 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 23:25:15,393 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:25:15" (1/1) ... [2021-12-06 23:25:15,393 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:25:15" (1/1) ... [2021-12-06 23:25:15,394 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:25:15" (1/1) ... [2021-12-06 23:25:15,395 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:25:15" (1/1) ... [2021-12-06 23:25:15,398 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:25:15" (1/1) ... [2021-12-06 23:25:15,402 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:25:15" (1/1) ... [2021-12-06 23:25:15,403 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:25:15" (1/1) ... [2021-12-06 23:25:15,405 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 23:25:15,406 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 23:25:15,406 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 23:25:15,406 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 23:25:15,407 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:25:15" (1/1) ... [2021-12-06 23:25:15,413 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 23:25:15,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:25:15,430 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 23:25:15,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 23:25:15,459 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 23:25:15,459 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 23:25:15,459 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 23:25:15,459 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 23:25:15,505 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 23:25:15,506 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 23:25:15,643 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 23:25:15,649 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 23:25:15,650 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-06 23:25:15,651 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 11:25:15 BoogieIcfgContainer [2021-12-06 23:25:15,652 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 23:25:15,654 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 23:25:15,654 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 23:25:15,657 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 23:25:15,657 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 11:25:15" (1/3) ... [2021-12-06 23:25:15,658 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a915f44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 11:25:15, skipping insertion in model container [2021-12-06 23:25:15,658 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:25:15" (2/3) ... [2021-12-06 23:25:15,658 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a915f44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 11:25:15, skipping insertion in model container [2021-12-06 23:25:15,659 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 11:25:15" (3/3) ... [2021-12-06 23:25:15,660 INFO L111 eAbstractionObserver]: Analyzing ICFG byte_add_1-1.i [2021-12-06 23:25:15,665 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 23:25:15,666 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 23:25:15,705 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 23:25:15,710 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-06 23:25:15,710 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 23:25:15,723 INFO L276 IsEmpty]: Start isEmpty. Operand has 42 states, 40 states have (on average 1.775) internal successors, (71), 41 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:25:15,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-06 23:25:15,727 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:25:15,728 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:25:15,728 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:25:15,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:25:15,732 INFO L85 PathProgramCache]: Analyzing trace with hash 255061167, now seen corresponding path program 1 times [2021-12-06 23:25:15,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:25:15,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993409214] [2021-12-06 23:25:15,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:25:15,740 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:25:15,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:25:15,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:25:15,870 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:25:15,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993409214] [2021-12-06 23:25:15,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993409214] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:25:15,871 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:25:15,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 23:25:15,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676779523] [2021-12-06 23:25:15,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:25:15,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-06 23:25:15,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:25:15,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-06 23:25:15,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 23:25:15,910 INFO L87 Difference]: Start difference. First operand has 42 states, 40 states have (on average 1.775) internal successors, (71), 41 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:25:15,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:25:15,927 INFO L93 Difference]: Finished difference Result 57 states and 92 transitions. [2021-12-06 23:25:15,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-06 23:25:15,930 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-12-06 23:25:15,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:25:15,939 INFO L225 Difference]: With dead ends: 57 [2021-12-06 23:25:15,939 INFO L226 Difference]: Without dead ends: 38 [2021-12-06 23:25:15,942 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 23:25:15,945 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:25:15,946 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:25:15,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-12-06 23:25:15,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-12-06 23:25:15,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.7297297297297298) internal successors, (64), 37 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:25:15,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 64 transitions. [2021-12-06 23:25:15,972 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 64 transitions. Word has length 12 [2021-12-06 23:25:15,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:25:15,973 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 64 transitions. [2021-12-06 23:25:15,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:25:15,973 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 64 transitions. [2021-12-06 23:25:15,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-06 23:25:15,974 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:25:15,974 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:25:15,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 23:25:15,974 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:25:15,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:25:15,975 INFO L85 PathProgramCache]: Analyzing trace with hash 1803477009, now seen corresponding path program 1 times [2021-12-06 23:25:15,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:25:15,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256371576] [2021-12-06 23:25:15,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:25:15,976 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:25:16,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:25:16,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:25:16,046 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:25:16,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256371576] [2021-12-06 23:25:16,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256371576] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:25:16,046 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:25:16,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 23:25:16,047 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540435934] [2021-12-06 23:25:16,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:25:16,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 23:25:16,048 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:25:16,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 23:25:16,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:25:16,049 INFO L87 Difference]: Start difference. First operand 38 states and 64 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:25:16,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:25:16,148 INFO L93 Difference]: Finished difference Result 89 states and 156 transitions. [2021-12-06 23:25:16,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 23:25:16,149 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-12-06 23:25:16,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:25:16,150 INFO L225 Difference]: With dead ends: 89 [2021-12-06 23:25:16,150 INFO L226 Difference]: Without dead ends: 61 [2021-12-06 23:25:16,151 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:25:16,153 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 24 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:25:16,153 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 59 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 23:25:16,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-12-06 23:25:16,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 59. [2021-12-06 23:25:16,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.5344827586206897) internal successors, (89), 58 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:25:16,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 89 transitions. [2021-12-06 23:25:16,162 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 89 transitions. Word has length 12 [2021-12-06 23:25:16,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:25:16,162 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 89 transitions. [2021-12-06 23:25:16,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:25:16,163 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 89 transitions. [2021-12-06 23:25:16,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-06 23:25:16,163 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:25:16,163 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:25:16,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 23:25:16,164 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:25:16,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:25:16,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1336656122, now seen corresponding path program 1 times [2021-12-06 23:25:16,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:25:16,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24524380] [2021-12-06 23:25:16,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:25:16,165 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:25:16,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:25:16,245 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 23:25:16,245 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:25:16,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24524380] [2021-12-06 23:25:16,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24524380] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:25:16,246 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:25:16,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 23:25:16,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062538336] [2021-12-06 23:25:16,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:25:16,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 23:25:16,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:25:16,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 23:25:16,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 23:25:16,247 INFO L87 Difference]: Start difference. First operand 59 states and 89 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:25:16,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:25:16,373 INFO L93 Difference]: Finished difference Result 143 states and 218 transitions. [2021-12-06 23:25:16,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 23:25:16,373 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-12-06 23:25:16,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:25:16,375 INFO L225 Difference]: With dead ends: 143 [2021-12-06 23:25:16,375 INFO L226 Difference]: Without dead ends: 105 [2021-12-06 23:25:16,376 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 23:25:16,377 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 85 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:25:16,378 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 156 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 23:25:16,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-12-06 23:25:16,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 67. [2021-12-06 23:25:16,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.4848484848484849) internal successors, (98), 66 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:25:16,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 98 transitions. [2021-12-06 23:25:16,388 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 98 transitions. Word has length 18 [2021-12-06 23:25:16,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:25:16,389 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 98 transitions. [2021-12-06 23:25:16,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:25:16,389 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 98 transitions. [2021-12-06 23:25:16,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-06 23:25:16,390 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:25:16,390 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:25:16,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-06 23:25:16,391 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:25:16,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:25:16,391 INFO L85 PathProgramCache]: Analyzing trace with hash -640429161, now seen corresponding path program 1 times [2021-12-06 23:25:16,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:25:16,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323223293] [2021-12-06 23:25:16,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:25:16,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:25:16,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:25:16,462 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 23:25:16,462 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:25:16,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323223293] [2021-12-06 23:25:16,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323223293] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:25:16,463 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:25:16,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 23:25:16,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474673579] [2021-12-06 23:25:16,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:25:16,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 23:25:16,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:25:16,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 23:25:16,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 23:25:16,469 INFO L87 Difference]: Start difference. First operand 67 states and 98 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:25:16,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:25:16,571 INFO L93 Difference]: Finished difference Result 169 states and 250 transitions. [2021-12-06 23:25:16,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 23:25:16,572 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-12-06 23:25:16,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:25:16,573 INFO L225 Difference]: With dead ends: 169 [2021-12-06 23:25:16,573 INFO L226 Difference]: Without dead ends: 125 [2021-12-06 23:25:16,574 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 23:25:16,575 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 89 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:25:16,576 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 164 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 23:25:16,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-12-06 23:25:16,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 77. [2021-12-06 23:25:16,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.4605263157894737) internal successors, (111), 76 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:25:16,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 111 transitions. [2021-12-06 23:25:16,584 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 111 transitions. Word has length 19 [2021-12-06 23:25:16,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:25:16,585 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 111 transitions. [2021-12-06 23:25:16,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:25:16,585 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 111 transitions. [2021-12-06 23:25:16,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-06 23:25:16,586 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:25:16,586 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] [2021-12-06 23:25:16,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-06 23:25:16,586 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:25:16,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:25:16,586 INFO L85 PathProgramCache]: Analyzing trace with hash -170409323, now seen corresponding path program 1 times [2021-12-06 23:25:16,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:25:16,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118717757] [2021-12-06 23:25:16,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:25:16,587 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:25:16,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:25:16,638 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 23:25:16,639 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:25:16,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118717757] [2021-12-06 23:25:16,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118717757] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:25:16,639 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:25:16,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 23:25:16,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679125175] [2021-12-06 23:25:16,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:25:16,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 23:25:16,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:25:16,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 23:25:16,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:25:16,640 INFO L87 Difference]: Start difference. First operand 77 states and 111 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:25:16,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:25:16,646 INFO L93 Difference]: Finished difference Result 124 states and 180 transitions. [2021-12-06 23:25:16,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 23:25:16,646 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-12-06 23:25:16,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:25:16,647 INFO L225 Difference]: With dead ends: 124 [2021-12-06 23:25:16,647 INFO L226 Difference]: Without dead ends: 60 [2021-12-06 23:25:16,648 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:25:16,649 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 57 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:25:16,650 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 58 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:25:16,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-12-06 23:25:16,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-12-06 23:25:16,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.4406779661016949) internal successors, (85), 59 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:25:16,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 85 transitions. [2021-12-06 23:25:16,656 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 85 transitions. Word has length 20 [2021-12-06 23:25:16,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:25:16,657 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 85 transitions. [2021-12-06 23:25:16,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:25:16,657 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 85 transitions. [2021-12-06 23:25:16,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-06 23:25:16,658 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:25:16,658 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] [2021-12-06 23:25:16,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-06 23:25:16,659 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:25:16,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:25:16,659 INFO L85 PathProgramCache]: Analyzing trace with hash -1388506533, now seen corresponding path program 1 times [2021-12-06 23:25:16,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:25:16,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355067178] [2021-12-06 23:25:16,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:25:16,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:25:16,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:25:16,704 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:25:16,704 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:25:16,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355067178] [2021-12-06 23:25:16,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355067178] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:25:16,704 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:25:16,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 23:25:16,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433103713] [2021-12-06 23:25:16,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:25:16,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 23:25:16,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:25:16,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 23:25:16,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:25:16,706 INFO L87 Difference]: Start difference. First operand 60 states and 85 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:25:16,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:25:16,714 INFO L93 Difference]: Finished difference Result 81 states and 115 transitions. [2021-12-06 23:25:16,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 23:25:16,715 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-12-06 23:25:16,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:25:16,716 INFO L225 Difference]: With dead ends: 81 [2021-12-06 23:25:16,716 INFO L226 Difference]: Without dead ends: 70 [2021-12-06 23:25:16,716 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:25:16,717 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 4 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:25:16,718 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 113 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:25:16,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-12-06 23:25:16,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2021-12-06 23:25:16,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.434782608695652) internal successors, (99), 69 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:25:16,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 99 transitions. [2021-12-06 23:25:16,725 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 99 transitions. Word has length 26 [2021-12-06 23:25:16,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:25:16,725 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 99 transitions. [2021-12-06 23:25:16,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:25:16,725 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 99 transitions. [2021-12-06 23:25:16,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-06 23:25:16,726 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:25:16,726 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] [2021-12-06 23:25:16,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-06 23:25:16,727 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:25:16,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:25:16,727 INFO L85 PathProgramCache]: Analyzing trace with hash -1130341095, now seen corresponding path program 1 times [2021-12-06 23:25:16,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:25:16,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673443438] [2021-12-06 23:25:16,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:25:16,728 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:25:16,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:25:16,768 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:25:16,768 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:25:16,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673443438] [2021-12-06 23:25:16,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673443438] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:25:16,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082894359] [2021-12-06 23:25:16,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:25:16,769 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:25:16,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:25:16,770 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:25:16,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 23:25:16,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:25:16,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 23:25:16,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:25:16,967 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:25:16,967 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 23:25:16,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082894359] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:25:16,967 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 23:25:16,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-12-06 23:25:16,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385950374] [2021-12-06 23:25:16,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:25:16,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 23:25:16,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:25:16,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 23:25:16,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-06 23:25:16,969 INFO L87 Difference]: Start difference. First operand 70 states and 99 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:25:17,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:25:17,104 INFO L93 Difference]: Finished difference Result 156 states and 254 transitions. [2021-12-06 23:25:17,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 23:25:17,104 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-12-06 23:25:17,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:25:17,105 INFO L225 Difference]: With dead ends: 156 [2021-12-06 23:25:17,105 INFO L226 Difference]: Without dead ends: 122 [2021-12-06 23:25:17,105 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-06 23:25:17,106 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 35 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:25:17,106 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 59 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 23:25:17,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-12-06 23:25:17,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 102. [2021-12-06 23:25:17,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.3366336633663367) internal successors, (135), 101 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:25:17,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 135 transitions. [2021-12-06 23:25:17,116 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 135 transitions. Word has length 26 [2021-12-06 23:25:17,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:25:17,116 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 135 transitions. [2021-12-06 23:25:17,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:25:17,117 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 135 transitions. [2021-12-06 23:25:17,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-06 23:25:17,118 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:25:17,118 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:25:17,138 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 23:25:17,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:25:17,320 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:25:17,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:25:17,322 INFO L85 PathProgramCache]: Analyzing trace with hash -1226843574, now seen corresponding path program 1 times [2021-12-06 23:25:17,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:25:17,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875721340] [2021-12-06 23:25:17,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:25:17,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:25:17,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:25:17,537 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:25:17,537 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:25:17,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875721340] [2021-12-06 23:25:17,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875721340] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:25:17,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493507086] [2021-12-06 23:25:17,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:25:17,538 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:25:17,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:25:17,538 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:25:17,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 23:25:17,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:25:17,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-06 23:25:17,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:25:17,636 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 23:25:17,636 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 23:25:17,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493507086] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:25:17,636 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 23:25:17,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2021-12-06 23:25:17,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382885799] [2021-12-06 23:25:17,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:25:17,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 23:25:17,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:25:17,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 23:25:17,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-06 23:25:17,638 INFO L87 Difference]: Start difference. First operand 102 states and 135 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:25:17,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:25:17,733 INFO L93 Difference]: Finished difference Result 243 states and 351 transitions. [2021-12-06 23:25:17,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 23:25:17,733 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-12-06 23:25:17,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:25:17,735 INFO L225 Difference]: With dead ends: 243 [2021-12-06 23:25:17,735 INFO L226 Difference]: Without dead ends: 160 [2021-12-06 23:25:17,735 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-06 23:25:17,736 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 37 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:25:17,737 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 89 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 23:25:17,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-12-06 23:25:17,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 131. [2021-12-06 23:25:17,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 1.2923076923076924) internal successors, (168), 130 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:25:17,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 168 transitions. [2021-12-06 23:25:17,746 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 168 transitions. Word has length 32 [2021-12-06 23:25:17,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:25:17,747 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 168 transitions. [2021-12-06 23:25:17,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:25:17,747 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 168 transitions. [2021-12-06 23:25:17,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-06 23:25:17,748 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:25:17,748 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:25:17,769 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 23:25:17,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:25:17,950 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:25:17,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:25:17,952 INFO L85 PathProgramCache]: Analyzing trace with hash -1448774913, now seen corresponding path program 1 times [2021-12-06 23:25:17,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:25:17,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531256028] [2021-12-06 23:25:17,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:25:17,953 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:25:18,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:25:18,146 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 23:25:18,146 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:25:18,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531256028] [2021-12-06 23:25:18,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531256028] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:25:18,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988723426] [2021-12-06 23:25:18,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:25:18,147 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:25:18,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:25:18,148 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:25:18,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 23:25:18,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:25:18,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-06 23:25:18,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:25:18,285 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-06 23:25:18,285 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 23:25:18,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988723426] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:25:18,286 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 23:25:18,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2021-12-06 23:25:18,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057072720] [2021-12-06 23:25:18,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:25:18,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 23:25:18,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:25:18,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 23:25:18,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-06 23:25:18,287 INFO L87 Difference]: Start difference. First operand 131 states and 168 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:25:18,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:25:18,419 INFO L93 Difference]: Finished difference Result 302 states and 416 transitions. [2021-12-06 23:25:18,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 23:25:18,419 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-12-06 23:25:18,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:25:18,421 INFO L225 Difference]: With dead ends: 302 [2021-12-06 23:25:18,421 INFO L226 Difference]: Without dead ends: 190 [2021-12-06 23:25:18,421 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-06 23:25:18,422 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 36 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:25:18,423 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 93 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 23:25:18,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-12-06 23:25:18,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 160. [2021-12-06 23:25:18,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 1.2641509433962264) internal successors, (201), 159 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:25:18,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 201 transitions. [2021-12-06 23:25:18,433 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 201 transitions. Word has length 38 [2021-12-06 23:25:18,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:25:18,433 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 201 transitions. [2021-12-06 23:25:18,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:25:18,433 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 201 transitions. [2021-12-06 23:25:18,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-06 23:25:18,435 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:25:18,435 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2021-12-06 23:25:18,454 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 23:25:18,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-12-06 23:25:18,637 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:25:18,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:25:18,638 INFO L85 PathProgramCache]: Analyzing trace with hash 882299696, now seen corresponding path program 1 times [2021-12-06 23:25:18,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:25:18,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011867338] [2021-12-06 23:25:18,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:25:18,640 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:25:18,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:25:18,835 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-06 23:25:18,835 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:25:18,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011867338] [2021-12-06 23:25:18,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011867338] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:25:18,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373123028] [2021-12-06 23:25:18,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:25:18,836 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:25:18,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:25:18,837 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:25:18,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 23:25:18,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:25:18,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-06 23:25:18,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:25:19,024 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-06 23:25:19,024 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 23:25:19,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373123028] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:25:19,024 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 23:25:19,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2021-12-06 23:25:19,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950785935] [2021-12-06 23:25:19,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:25:19,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 23:25:19,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:25:19,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 23:25:19,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-06 23:25:19,026 INFO L87 Difference]: Start difference. First operand 160 states and 201 transitions. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:25:19,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:25:19,094 INFO L93 Difference]: Finished difference Result 327 states and 422 transitions. [2021-12-06 23:25:19,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 23:25:19,094 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-12-06 23:25:19,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:25:19,095 INFO L225 Difference]: With dead ends: 327 [2021-12-06 23:25:19,095 INFO L226 Difference]: Without dead ends: 150 [2021-12-06 23:25:19,096 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-12-06 23:25:19,096 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 66 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:25:19,096 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 46 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 23:25:19,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-12-06 23:25:19,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 130. [2021-12-06 23:25:19,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 1.255813953488372) internal successors, (162), 129 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:25:19,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 162 transitions. [2021-12-06 23:25:19,107 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 162 transitions. Word has length 44 [2021-12-06 23:25:19,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:25:19,107 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 162 transitions. [2021-12-06 23:25:19,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:25:19,108 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 162 transitions. [2021-12-06 23:25:19,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-06 23:25:19,109 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:25:19,109 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:25:19,140 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-06 23:25:19,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-06 23:25:19,311 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:25:19,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:25:19,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1716436880, now seen corresponding path program 1 times [2021-12-06 23:25:19,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:25:19,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72851989] [2021-12-06 23:25:19,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:25:19,314 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:25:19,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:25:19,416 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-06 23:25:19,416 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:25:19,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72851989] [2021-12-06 23:25:19,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72851989] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:25:19,416 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:25:19,416 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 23:25:19,416 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140632878] [2021-12-06 23:25:19,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:25:19,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 23:25:19,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:25:19,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 23:25:19,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 23:25:19,417 INFO L87 Difference]: Start difference. First operand 130 states and 162 transitions. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:25:19,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:25:19,585 INFO L93 Difference]: Finished difference Result 491 states and 613 transitions. [2021-12-06 23:25:19,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 23:25:19,585 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-12-06 23:25:19,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:25:19,588 INFO L225 Difference]: With dead ends: 491 [2021-12-06 23:25:19,588 INFO L226 Difference]: Without dead ends: 380 [2021-12-06 23:25:19,588 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-06 23:25:19,589 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 135 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:25:19,589 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 200 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 23:25:19,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2021-12-06 23:25:19,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 130. [2021-12-06 23:25:19,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 1.255813953488372) internal successors, (162), 129 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:25:19,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 162 transitions. [2021-12-06 23:25:19,597 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 162 transitions. Word has length 65 [2021-12-06 23:25:19,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:25:19,597 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 162 transitions. [2021-12-06 23:25:19,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:25:19,598 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 162 transitions. [2021-12-06 23:25:19,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-06 23:25:19,598 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:25:19,599 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:25:19,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-06 23:25:19,599 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:25:19,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:25:19,599 INFO L85 PathProgramCache]: Analyzing trace with hash -865911640, now seen corresponding path program 1 times [2021-12-06 23:25:19,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:25:19,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903028109] [2021-12-06 23:25:19,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:25:19,600 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:25:19,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:25:19,670 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-12-06 23:25:19,670 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:25:19,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903028109] [2021-12-06 23:25:19,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903028109] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:25:19,670 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:25:19,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 23:25:19,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967889681] [2021-12-06 23:25:19,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:25:19,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 23:25:19,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:25:19,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 23:25:19,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-06 23:25:19,671 INFO L87 Difference]: Start difference. First operand 130 states and 162 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:25:19,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:25:19,734 INFO L93 Difference]: Finished difference Result 386 states and 482 transitions. [2021-12-06 23:25:19,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 23:25:19,734 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-12-06 23:25:19,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:25:19,736 INFO L225 Difference]: With dead ends: 386 [2021-12-06 23:25:19,736 INFO L226 Difference]: Without dead ends: 275 [2021-12-06 23:25:19,736 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-06 23:25:19,736 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 110 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:25:19,737 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 145 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:25:19,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2021-12-06 23:25:19,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 202. [2021-12-06 23:25:19,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 1.263681592039801) internal successors, (254), 201 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:25:19,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 254 transitions. [2021-12-06 23:25:19,743 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 254 transitions. Word has length 66 [2021-12-06 23:25:19,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:25:19,743 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 254 transitions. [2021-12-06 23:25:19,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:25:19,743 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 254 transitions. [2021-12-06 23:25:19,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-06 23:25:19,744 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:25:19,744 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:25:19,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-06 23:25:19,744 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:25:19,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:25:19,744 INFO L85 PathProgramCache]: Analyzing trace with hash 511658858, now seen corresponding path program 1 times [2021-12-06 23:25:19,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:25:19,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657024250] [2021-12-06 23:25:19,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:25:19,745 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:25:19,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:25:19,820 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-06 23:25:19,821 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:25:19,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657024250] [2021-12-06 23:25:19,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657024250] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:25:19,821 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:25:19,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 23:25:19,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205236008] [2021-12-06 23:25:19,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:25:19,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 23:25:19,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:25:19,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 23:25:19,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-06 23:25:19,823 INFO L87 Difference]: Start difference. First operand 202 states and 254 transitions. Second operand has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:25:20,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:25:20,133 INFO L93 Difference]: Finished difference Result 995 states and 1247 transitions. [2021-12-06 23:25:20,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 23:25:20,133 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-12-06 23:25:20,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:25:20,136 INFO L225 Difference]: With dead ends: 995 [2021-12-06 23:25:20,137 INFO L226 Difference]: Without dead ends: 812 [2021-12-06 23:25:20,137 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-12-06 23:25:20,138 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 203 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 23:25:20,138 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 335 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 23:25:20,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2021-12-06 23:25:20,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 202. [2021-12-06 23:25:20,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 1.263681592039801) internal successors, (254), 201 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:25:20,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 254 transitions. [2021-12-06 23:25:20,147 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 254 transitions. Word has length 66 [2021-12-06 23:25:20,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:25:20,147 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 254 transitions. [2021-12-06 23:25:20,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:25:20,148 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 254 transitions. [2021-12-06 23:25:20,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-06 23:25:20,148 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:25:20,148 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:25:20,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-06 23:25:20,148 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:25:20,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:25:20,149 INFO L85 PathProgramCache]: Analyzing trace with hash 309834924, now seen corresponding path program 1 times [2021-12-06 23:25:20,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:25:20,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182680947] [2021-12-06 23:25:20,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:25:20,149 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:25:20,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:25:20,228 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-06 23:25:20,228 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:25:20,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182680947] [2021-12-06 23:25:20,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182680947] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:25:20,228 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:25:20,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 23:25:20,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469793378] [2021-12-06 23:25:20,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:25:20,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 23:25:20,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:25:20,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 23:25:20,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 23:25:20,229 INFO L87 Difference]: Start difference. First operand 202 states and 254 transitions. Second operand has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:25:20,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:25:20,621 INFO L93 Difference]: Finished difference Result 1014 states and 1267 transitions. [2021-12-06 23:25:20,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 23:25:20,621 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-12-06 23:25:20,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:25:20,626 INFO L225 Difference]: With dead ends: 1014 [2021-12-06 23:25:20,626 INFO L226 Difference]: Without dead ends: 831 [2021-12-06 23:25:20,626 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-12-06 23:25:20,627 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 271 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 23:25:20,627 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [271 Valid, 389 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 440 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 23:25:20,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 831 states. [2021-12-06 23:25:20,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 831 to 198. [2021-12-06 23:25:20,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 1.2690355329949239) internal successors, (250), 197 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:25:20,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 250 transitions. [2021-12-06 23:25:20,640 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 250 transitions. Word has length 66 [2021-12-06 23:25:20,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:25:20,641 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 250 transitions. [2021-12-06 23:25:20,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:25:20,641 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 250 transitions. [2021-12-06 23:25:20,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-06 23:25:20,642 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:25:20,642 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:25:20,642 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-06 23:25:20,642 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:25:20,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:25:20,643 INFO L85 PathProgramCache]: Analyzing trace with hash -1499003605, now seen corresponding path program 1 times [2021-12-06 23:25:20,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:25:20,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185089628] [2021-12-06 23:25:20,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:25:20,643 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:25:20,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:25:20,730 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 51 proven. 3 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-06 23:25:20,731 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:25:20,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185089628] [2021-12-06 23:25:20,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185089628] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:25:20,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611104895] [2021-12-06 23:25:20,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:25:20,731 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:25:20,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:25:20,732 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:25:20,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 23:25:20,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:25:20,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-06 23:25:20,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:25:20,924 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 48 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-06 23:25:20,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:25:21,063 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 52 proven. 3 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-06 23:25:21,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611104895] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:25:21,063 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:25:21,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6] total 12 [2021-12-06 23:25:21,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076434588] [2021-12-06 23:25:21,064 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:25:21,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-06 23:25:21,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:25:21,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-06 23:25:21,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=77, Unknown=0, NotChecked=0, Total=132 [2021-12-06 23:25:21,065 INFO L87 Difference]: Start difference. First operand 198 states and 250 transitions. Second operand has 12 states, 12 states have (on average 8.916666666666666) internal successors, (107), 12 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:25:21,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:25:21,317 INFO L93 Difference]: Finished difference Result 936 states and 1184 transitions. [2021-12-06 23:25:21,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-06 23:25:21,318 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 8.916666666666666) internal successors, (107), 12 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-12-06 23:25:21,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:25:21,321 INFO L225 Difference]: With dead ends: 936 [2021-12-06 23:25:21,321 INFO L226 Difference]: Without dead ends: 753 [2021-12-06 23:25:21,322 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2021-12-06 23:25:21,322 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 389 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 389 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 23:25:21,322 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [389 Valid, 149 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 23:25:21,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 753 states. [2021-12-06 23:25:21,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 753 to 600. [2021-12-06 23:25:21,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 600 states, 599 states have (on average 1.2771285475792988) internal successors, (765), 599 states have internal predecessors, (765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:25:21,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 765 transitions. [2021-12-06 23:25:21,342 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 765 transitions. Word has length 68 [2021-12-06 23:25:21,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:25:21,342 INFO L470 AbstractCegarLoop]: Abstraction has 600 states and 765 transitions. [2021-12-06 23:25:21,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.916666666666666) internal successors, (107), 12 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:25:21,342 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 765 transitions. [2021-12-06 23:25:21,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-06 23:25:21,343 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:25:21,343 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:25:21,375 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-06 23:25:21,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-06 23:25:21,544 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:25:21,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:25:21,544 INFO L85 PathProgramCache]: Analyzing trace with hash 1439601588, now seen corresponding path program 1 times [2021-12-06 23:25:21,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:25:21,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280548612] [2021-12-06 23:25:21,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:25:21,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:25:21,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:25:21,650 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 48 proven. 7 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-06 23:25:21,651 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:25:21,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280548612] [2021-12-06 23:25:21,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280548612] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:25:21,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816546330] [2021-12-06 23:25:21,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:25:21,651 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:25:21,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:25:21,652 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:25:21,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 23:25:21,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:25:21,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-06 23:25:21,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:25:22,806 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 48 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-06 23:25:22,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:25:22,990 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 52 proven. 3 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-06 23:25:22,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816546330] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:25:22,990 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:25:22,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 16 [2021-12-06 23:25:22,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407279150] [2021-12-06 23:25:22,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:25:22,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-06 23:25:22,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:25:22,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-06 23:25:22,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-12-06 23:25:22,992 INFO L87 Difference]: Start difference. First operand 600 states and 765 transitions. Second operand has 16 states, 16 states have (on average 6.5625) internal successors, (105), 16 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:25:23,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:25:23,826 INFO L93 Difference]: Finished difference Result 1746 states and 2221 transitions. [2021-12-06 23:25:23,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-06 23:25:23,826 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 6.5625) internal successors, (105), 16 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-12-06 23:25:23,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:25:23,832 INFO L225 Difference]: With dead ends: 1746 [2021-12-06 23:25:23,832 INFO L226 Difference]: Without dead ends: 1302 [2021-12-06 23:25:23,833 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 131 SyntacticMatches, 9 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=191, Invalid=459, Unknown=0, NotChecked=0, Total=650 [2021-12-06 23:25:23,834 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 530 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 604 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 530 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 173 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 23:25:23,834 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [530 Valid, 437 Invalid, 823 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 604 Invalid, 0 Unknown, 173 Unchecked, 0.5s Time] [2021-12-06 23:25:23,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1302 states. [2021-12-06 23:25:23,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1302 to 912. [2021-12-06 23:25:23,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 912 states, 911 states have (on average 1.300768386388584) internal successors, (1185), 911 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:25:23,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 912 states to 912 states and 1185 transitions. [2021-12-06 23:25:23,863 INFO L78 Accepts]: Start accepts. Automaton has 912 states and 1185 transitions. Word has length 70 [2021-12-06 23:25:23,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:25:23,864 INFO L470 AbstractCegarLoop]: Abstraction has 912 states and 1185 transitions. [2021-12-06 23:25:23,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.5625) internal successors, (105), 16 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:25:23,864 INFO L276 IsEmpty]: Start isEmpty. Operand 912 states and 1185 transitions. [2021-12-06 23:25:23,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-06 23:25:23,865 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:25:23,865 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:25:23,869 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-06 23:25:24,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:25:24,066 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:25:24,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:25:24,066 INFO L85 PathProgramCache]: Analyzing trace with hash 1493994486, now seen corresponding path program 1 times [2021-12-06 23:25:24,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:25:24,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698256643] [2021-12-06 23:25:24,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:25:24,067 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:25:24,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:25:24,177 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 53 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-06 23:25:24,177 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:25:24,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698256643] [2021-12-06 23:25:24,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698256643] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:25:24,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426385956] [2021-12-06 23:25:24,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:25:24,178 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:25:24,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:25:24,179 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:25:24,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-06 23:25:24,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:25:24,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-06 23:25:24,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:25:24,428 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 57 proven. 6 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-06 23:25:24,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:25:24,534 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 47 proven. 21 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-06 23:25:24,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426385956] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:25:24,535 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:25:24,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2021-12-06 23:25:24,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586950921] [2021-12-06 23:25:24,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:25:24,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-06 23:25:24,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:25:24,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-06 23:25:24,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-12-06 23:25:24,537 INFO L87 Difference]: Start difference. First operand 912 states and 1185 transitions. Second operand has 14 states, 14 states have (on average 9.785714285714286) internal successors, (137), 14 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:25:24,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:25:24,839 INFO L93 Difference]: Finished difference Result 1970 states and 2529 transitions. [2021-12-06 23:25:24,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-06 23:25:24,840 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 9.785714285714286) internal successors, (137), 14 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-12-06 23:25:24,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:25:24,845 INFO L225 Difference]: With dead ends: 1970 [2021-12-06 23:25:24,845 INFO L226 Difference]: Without dead ends: 1085 [2021-12-06 23:25:24,846 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=133, Invalid=373, Unknown=0, NotChecked=0, Total=506 [2021-12-06 23:25:24,847 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 243 mSDsluCounter, 450 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 552 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 23:25:24,847 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 552 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 23:25:24,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1085 states. [2021-12-06 23:25:24,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1085 to 688. [2021-12-06 23:25:24,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 688 states, 687 states have (on average 1.2925764192139737) internal successors, (888), 687 states have internal predecessors, (888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:25:24,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 688 states to 688 states and 888 transitions. [2021-12-06 23:25:24,872 INFO L78 Accepts]: Start accepts. Automaton has 688 states and 888 transitions. Word has length 70 [2021-12-06 23:25:24,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:25:24,872 INFO L470 AbstractCegarLoop]: Abstraction has 688 states and 888 transitions. [2021-12-06 23:25:24,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 9.785714285714286) internal successors, (137), 14 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:25:24,872 INFO L276 IsEmpty]: Start isEmpty. Operand 688 states and 888 transitions. [2021-12-06 23:25:24,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-06 23:25:24,873 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:25:24,873 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:25:24,906 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-06 23:25:25,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:25:25,074 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:25:25,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:25:25,074 INFO L85 PathProgramCache]: Analyzing trace with hash 605183798, now seen corresponding path program 2 times [2021-12-06 23:25:25,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:25:25,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709007833] [2021-12-06 23:25:25,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:25:25,075 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:25:25,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-06 23:25:25,103 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-06 23:25:25,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-06 23:25:25,158 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-06 23:25:25,158 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-06 23:25:25,159 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-06 23:25:25,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-06 23:25:25,163 INFO L732 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:25:25,165 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-06 23:25:25,234 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.12 11:25:25 BoogieIcfgContainer [2021-12-06 23:25:25,234 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-06 23:25:25,235 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-06 23:25:25,235 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-06 23:25:25,235 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-06 23:25:25,235 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 11:25:15" (3/4) ... [2021-12-06 23:25:25,237 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-12-06 23:25:25,237 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-06 23:25:25,238 INFO L158 Benchmark]: Toolchain (without parser) took 10089.96ms. Allocated memory was 111.1MB in the beginning and 161.5MB in the end (delta: 50.3MB). Free memory was 86.7MB in the beginning and 126.6MB in the end (delta: -39.8MB). Peak memory consumption was 10.3MB. Max. memory is 16.1GB. [2021-12-06 23:25:25,238 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 75.5MB. Free memory is still 50.4MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-06 23:25:25,238 INFO L158 Benchmark]: CACSL2BoogieTranslator took 207.10ms. Allocated memory is still 111.1MB. Free memory was 86.7MB in the beginning and 81.2MB in the end (delta: 5.5MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-12-06 23:25:25,239 INFO L158 Benchmark]: Boogie Procedure Inliner took 29.75ms. Allocated memory is still 111.1MB. Free memory was 81.2MB in the beginning and 79.3MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-06 23:25:25,239 INFO L158 Benchmark]: Boogie Preprocessor took 18.65ms. Allocated memory is still 111.1MB. Free memory was 79.3MB in the beginning and 78.0MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-06 23:25:25,239 INFO L158 Benchmark]: RCFGBuilder took 245.74ms. Allocated memory is still 111.1MB. Free memory was 78.0MB in the beginning and 65.6MB in the end (delta: 12.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-12-06 23:25:25,239 INFO L158 Benchmark]: TraceAbstraction took 9580.78ms. Allocated memory was 111.1MB in the beginning and 161.5MB in the end (delta: 50.3MB). Free memory was 65.1MB in the beginning and 126.6MB in the end (delta: -61.5MB). Peak memory consumption was 72.8MB. Max. memory is 16.1GB. [2021-12-06 23:25:25,239 INFO L158 Benchmark]: Witness Printer took 2.69ms. Allocated memory is still 161.5MB. Free memory is still 126.6MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-06 23:25:25,241 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 75.5MB. Free memory is still 50.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 207.10ms. Allocated memory is still 111.1MB. Free memory was 86.7MB in the beginning and 81.2MB in the end (delta: 5.5MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 29.75ms. Allocated memory is still 111.1MB. Free memory was 81.2MB in the beginning and 79.3MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 18.65ms. Allocated memory is still 111.1MB. Free memory was 79.3MB in the beginning and 78.0MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 245.74ms. Allocated memory is still 111.1MB. Free memory was 78.0MB in the beginning and 65.6MB in the end (delta: 12.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 9580.78ms. Allocated memory was 111.1MB in the beginning and 161.5MB in the end (delta: 50.3MB). Free memory was 65.1MB in the beginning and 126.6MB in the end (delta: -61.5MB). Peak memory consumption was 72.8MB. Max. memory is 16.1GB. * Witness Printer took 2.69ms. Allocated memory is still 161.5MB. Free memory is still 126.6MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 25]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of bitwiseOr at line 116, overapproximation of bitwiseAnd at line 96. Possible FailurePath: [L124] unsigned int a, b, r; [L126] b = __VERIFIER_nondet_uint() [L128] a = 234770789 [L130] CALL, EXPR mp_add(a, b) [L42] unsigned char a0, a1, a2, a3; [L43] unsigned char b0, b1, b2, b3; [L44] unsigned char r0, r1, r2, r3; [L45] unsigned short carry; [L46] unsigned short partial_sum; [L47] unsigned int r; [L48] unsigned char i; [L49] unsigned char na, nb; [L50] a0 = a [L51] a1 = a >> 8 [L52] a2 = a >> 16U [L53] a3 = a >> 24U [L54] b0 = b [L55] b1 = b >> 8U [L56] b2 = b >> 16U [L57] b3 = b >> 24U [L58] na = (unsigned char)4 VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, na=4] [L59] COND FALSE !(a3 == (unsigned char)0) VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, na=4] [L68] nb = (unsigned char)4 VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, na=4, nb=4] [L69] COND TRUE b3 == (unsigned char)0 [L70] nb = nb - 1 VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, na=4, nb=3] [L71] COND TRUE b2 == (unsigned char)0 [L72] nb = nb - 1 VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, na=4, nb=2] [L73] COND TRUE b1 == (unsigned char)0 [L74] nb = nb - 1 VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, na=4, nb=1] [L78] carry = (unsigned short)0 [L79] i = (unsigned char)0 VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=0, na=4, nb=1] [L80] COND TRUE (i < na) || (i < nb) || (carry != (unsigned short)0) [L81] partial_sum = carry [L82] carry = (unsigned short)0 VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=0, na=4, nb=1, partial_sum=0] [L83] COND TRUE i < na VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=0, na=4, nb=1, partial_sum=0] [L84] COND TRUE i == (unsigned char)0 [L84] partial_sum = partial_sum + a0 VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=0, na=4, nb=1, partial_sum=101] [L85] COND FALSE !(i == (unsigned char)1) VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=0, na=4, nb=1, partial_sum=101] [L86] COND FALSE !(i == (unsigned char)2) VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=0, na=4, nb=1, partial_sum=101] [L87] COND FALSE !(i == (unsigned char)3) VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=0, na=4, nb=1, partial_sum=101] [L89] COND TRUE i < nb VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=0, na=4, nb=1, partial_sum=101] [L90] COND TRUE i == (unsigned char)0 [L90] partial_sum = partial_sum + b0 VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=0, na=4, nb=1, partial_sum=356] [L91] COND FALSE !(i == (unsigned char)1) VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=0, na=4, nb=1, partial_sum=356] [L92] COND FALSE !(i == (unsigned char)2) VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=0, na=4, nb=1, partial_sum=356] [L93] COND FALSE !(i == (unsigned char)3) VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=0, na=4, nb=1, partial_sum=356] [L95] COND TRUE partial_sum > ((unsigned char)255) [L96] partial_sum = partial_sum & ((unsigned char)255) [L97] carry = (unsigned short)1 VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=1, i=0, na=4, nb=1] [L99] COND TRUE i == (unsigned char)0 [L99] r0 = (unsigned char)partial_sum VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=1, i=0, na=4, nb=1, partial_sum=20838, r0=234770790] [L100] COND FALSE !(i == (unsigned char)1) VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=1, i=0, na=4, nb=1, partial_sum=20838, r0=234770790] [L101] COND FALSE !(i == (unsigned char)2) VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=1, i=0, na=4, nb=1, partial_sum=20838, r0=234770790] [L102] COND FALSE !(i == (unsigned char)3) VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=1, i=0, na=4, nb=1, partial_sum=20838, r0=234770790] [L104] i = i + (unsigned char)1 VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=1, i=1, na=4, nb=1, partial_sum=20838, r0=234770790] [L80] COND TRUE (i < na) || (i < nb) || (carry != (unsigned short)0) [L81] partial_sum = carry [L82] carry = (unsigned short)0 VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=1, na=4, nb=1, partial_sum=1, r0=234770790] [L83] COND TRUE i < na VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=1, na=4, nb=1, partial_sum=1, r0=234770790] [L84] COND FALSE !(i == (unsigned char)0) VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=1, na=4, nb=1, partial_sum=1, r0=234770790] [L85] COND TRUE i == (unsigned char)1 [L85] partial_sum = partial_sum + a1 VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=1, na=4, nb=1, partial_sum=82, r0=234770790] [L86] COND FALSE !(i == (unsigned char)2) VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=1, na=4, nb=1, partial_sum=82, r0=234770790] [L87] COND FALSE !(i == (unsigned char)3) VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=1, na=4, nb=1, partial_sum=82, r0=234770790] [L89] COND FALSE !(i < nb) VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=1, na=4, nb=1, partial_sum=82, r0=234770790] [L95] COND FALSE !(partial_sum > ((unsigned char)255)) VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=1, na=4, nb=1, partial_sum=82, r0=234770790] [L99] COND FALSE !(i == (unsigned char)0) VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=1, na=4, nb=1, partial_sum=82, r0=234770790] [L100] COND TRUE i == (unsigned char)1 [L100] r1 = (unsigned char)partial_sum VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=1, na=4, nb=1, partial_sum=82, r0=234770790, r1=82] [L101] COND FALSE !(i == (unsigned char)2) VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=1, na=4, nb=1, partial_sum=82, r0=234770790, r1=82] [L102] COND FALSE !(i == (unsigned char)3) VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=1, na=4, nb=1, partial_sum=82, r0=234770790, r1=82] [L104] i = i + (unsigned char)1 VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=2, na=4, nb=1, partial_sum=82, r0=234770790, r1=82] [L80] COND TRUE (i < na) || (i < nb) || (carry != (unsigned short)0) [L81] partial_sum = carry [L82] carry = (unsigned short)0 VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=2, na=4, nb=1, partial_sum=0, r0=234770790, r1=82] [L83] COND TRUE i < na VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=2, na=4, nb=1, partial_sum=0, r0=234770790, r1=82] [L84] COND FALSE !(i == (unsigned char)0) VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=2, na=4, nb=1, partial_sum=0, r0=234770790, r1=82] [L85] COND FALSE !(i == (unsigned char)1) VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=2, na=4, nb=1, partial_sum=0, r0=234770790, r1=82] [L86] COND TRUE i == (unsigned char)2 [L86] partial_sum = partial_sum + a2 VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=2, na=4, nb=1, partial_sum=254, r0=234770790, r1=82] [L87] COND FALSE !(i == (unsigned char)3) VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=2, na=4, nb=1, partial_sum=254, r0=234770790, r1=82] [L89] COND FALSE !(i < nb) VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=2, na=4, nb=1, partial_sum=254, r0=234770790, r1=82] [L95] COND FALSE !(partial_sum > ((unsigned char)255)) VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=2, na=4, nb=1, partial_sum=254, r0=234770790, r1=82] [L99] COND FALSE !(i == (unsigned char)0) VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=2, na=4, nb=1, partial_sum=254, r0=234770790, r1=82] [L100] COND FALSE !(i == (unsigned char)1) VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=2, na=4, nb=1, partial_sum=254, r0=234770790, r1=82] [L101] COND TRUE i == (unsigned char)2 [L101] r2 = (unsigned char)partial_sum VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=2, na=4, nb=1, partial_sum=254, r0=234770790, r1=82, r2=254] [L102] COND FALSE !(i == (unsigned char)3) VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=2, na=4, nb=1, partial_sum=254, r0=234770790, r1=82, r2=254] [L104] i = i + (unsigned char)1 VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=3, na=4, nb=1, partial_sum=254, r0=234770790, r1=82, r2=254] [L80] COND TRUE (i < na) || (i < nb) || (carry != (unsigned short)0) [L81] partial_sum = carry [L82] carry = (unsigned short)0 VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=3, na=4, nb=1, partial_sum=0, r0=234770790, r1=82, r2=254] [L83] COND TRUE i < na VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=3, na=4, nb=1, partial_sum=0, r0=234770790, r1=82, r2=254] [L84] COND FALSE !(i == (unsigned char)0) VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=3, na=4, nb=1, partial_sum=0, r0=234770790, r1=82, r2=254] [L85] COND FALSE !(i == (unsigned char)1) VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=3, na=4, nb=1, partial_sum=0, r0=234770790, r1=82, r2=254] [L86] COND FALSE !(i == (unsigned char)2) VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=3, na=4, nb=1, partial_sum=0, r0=234770790, r1=82, r2=254] [L87] COND TRUE i == (unsigned char)3 [L87] partial_sum = partial_sum + a3 VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=3, na=4, nb=1, partial_sum=13, r0=234770790, r1=82, r2=254] [L89] COND FALSE !(i < nb) VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=3, na=4, nb=1, partial_sum=13, r0=234770790, r1=82, r2=254] [L95] COND FALSE !(partial_sum > ((unsigned char)255)) VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=3, na=4, nb=1, partial_sum=13, r0=234770790, r1=82, r2=254] [L99] COND FALSE !(i == (unsigned char)0) VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=3, na=4, nb=1, partial_sum=13, r0=234770790, r1=82, r2=254] [L100] COND FALSE !(i == (unsigned char)1) VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=3, na=4, nb=1, partial_sum=13, r0=234770790, r1=82, r2=254] [L101] COND FALSE !(i == (unsigned char)2) VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=3, na=4, nb=1, partial_sum=13, r0=234770790, r1=82, r2=254] [L102] COND TRUE i == (unsigned char)3 [L102] r3 = (unsigned char)partial_sum VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=3, na=4, nb=1, partial_sum=13, r0=234770790, r1=82, r2=254, r3=13] [L104] i = i + (unsigned char)1 VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=4, na=4, nb=1, partial_sum=13, r0=234770790, r1=82, r2=254, r3=13] [L80] COND FALSE !((i < na) || (i < nb) || (carry != (unsigned short)0)) VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=4, na=4, nb=1, partial_sum=13, r0=234770790, r1=82, r2=254, r3=13] [L107] COND FALSE !(i < (unsigned char)4) VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=4, na=4, nb=1, partial_sum=13, r0=234770790, r1=82, r2=254, r3=13] [L116] r = r0 | (r1 << 8U) | (r2 << 16U) | ((unsigned int)r3 << 24U) [L118] return r; VAL [\old(a)=234770789, \old(b)=255, \result=3, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=4, na=4, nb=1, partial_sum=13, r=3, r0=234770790, r1=82, r2=254, r3=13] [L130] RET, EXPR mp_add(a, b) [L130] r = mp_add(a, b) [L132] CALL __VERIFIER_assert(r == a + b) [L24] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L25] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 42 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 9.5s, OverallIterations: 18, TraceHistogramMax: 4, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 3.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2314 SdHoareTripleChecker+Valid, 2.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2314 mSDsluCounter, 3112 SdHoareTripleChecker+Invalid, 2.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 173 IncrementalHoareTripleChecker+Unchecked, 2043 mSDsCounter, 275 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3105 IncrementalHoareTripleChecker+Invalid, 3553 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 275 mSolverCounterUnsat, 1069 mSDtfsCounter, 3105 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 695 GetRequests, 564 SyntacticMatches, 17 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 1.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=912occurred in iteration=16, InterpolantAutomatonStates: 107, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 17 MinimizatonAttempts, 2693 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 3.1s InterpolantComputationTime, 1136 NumberOfCodeBlocks, 1136 NumberOfCodeBlocksAsserted, 25 NumberOfCheckSat, 1247 ConstructedInterpolants, 26 QuantifiedInterpolants, 6493 SizeOfPredicates, 21 NumberOfNonLiveVariables, 1029 ConjunctsInSsa, 57 ConjunctsInUnsatCore, 27 InterpolantComputations, 14 PerfectInterpolantSequences, 1079/1138 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-12-06 23:25:25,254 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/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_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/bitvector/byte_add_1-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/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 0ba3e3db8f44a5e9ad151b8422bee8deebac1dcf47a42cba5485daeafd8d8e80 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 23:25:26,817 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 23:25:26,818 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 23:25:26,841 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 23:25:26,841 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 23:25:26,842 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 23:25:26,843 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 23:25:26,845 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 23:25:26,847 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 23:25:26,848 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 23:25:26,849 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 23:25:26,850 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 23:25:26,850 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 23:25:26,851 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 23:25:26,852 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 23:25:26,853 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 23:25:26,854 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 23:25:26,855 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 23:25:26,857 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 23:25:26,858 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 23:25:26,860 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 23:25:26,861 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 23:25:26,863 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 23:25:26,863 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 23:25:26,867 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 23:25:26,868 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 23:25:26,868 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 23:25:26,869 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 23:25:26,870 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 23:25:26,871 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 23:25:26,872 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 23:25:26,873 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 23:25:26,873 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 23:25:26,874 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 23:25:26,875 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 23:25:26,875 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 23:25:26,883 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 23:25:26,883 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 23:25:26,883 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 23:25:26,885 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 23:25:26,885 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 23:25:26,886 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-12-06 23:25:26,910 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 23:25:26,910 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 23:25:26,911 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 23:25:26,911 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 23:25:26,912 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 23:25:26,912 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 23:25:26,912 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 23:25:26,913 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 23:25:26,913 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 23:25:26,913 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 23:25:26,913 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 23:25:26,913 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 23:25:26,914 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 23:25:26,914 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 23:25:26,914 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 23:25:26,914 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 23:25:26,914 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-06 23:25:26,914 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-06 23:25:26,915 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-06 23:25:26,915 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 23:25:26,915 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 23:25:26,915 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 23:25:26,915 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 23:25:26,915 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 23:25:26,915 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 23:25:26,915 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 23:25:26,916 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 23:25:26,916 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 23:25:26,916 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 23:25:26,916 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 23:25:26,916 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-06 23:25:26,916 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-06 23:25:26,916 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 23:25:26,917 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 23:25:26,917 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 23:25:26,917 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 23:25:26,917 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-06 23:25:26,917 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_7d49c5aa-baf6-441d-8815-1cb34b50426c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0ba3e3db8f44a5e9ad151b8422bee8deebac1dcf47a42cba5485daeafd8d8e80 [2021-12-06 23:25:27,149 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 23:25:27,164 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 23:25:27,165 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 23:25:27,166 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 23:25:27,167 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 23:25:27,168 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/bitvector/byte_add_1-1.i [2021-12-06 23:25:27,211 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/data/fd4506cb5/d28666295ca14d12bf683d90d955a70d/FLAGae1e6c6ee [2021-12-06 23:25:27,602 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 23:25:27,602 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/sv-benchmarks/c/bitvector/byte_add_1-1.i [2021-12-06 23:25:27,608 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/data/fd4506cb5/d28666295ca14d12bf683d90d955a70d/FLAGae1e6c6ee [2021-12-06 23:25:27,617 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/data/fd4506cb5/d28666295ca14d12bf683d90d955a70d [2021-12-06 23:25:27,619 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 23:25:27,620 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 23:25:27,621 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 23:25:27,621 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 23:25:27,623 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 23:25:27,624 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 11:25:27" (1/1) ... [2021-12-06 23:25:27,625 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@761a636e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:25:27, skipping insertion in model container [2021-12-06 23:25:27,625 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 11:25:27" (1/1) ... [2021-12-06 23:25:27,629 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 23:25:27,647 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 23:25:27,749 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_7d49c5aa-baf6-441d-8815-1cb34b50426c/sv-benchmarks/c/bitvector/byte_add_1-1.i[1168,1181] [2021-12-06 23:25:27,777 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 23:25:27,784 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 23:25:27,793 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_7d49c5aa-baf6-441d-8815-1cb34b50426c/sv-benchmarks/c/bitvector/byte_add_1-1.i[1168,1181] [2021-12-06 23:25:27,810 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 23:25:27,820 INFO L208 MainTranslator]: Completed translation [2021-12-06 23:25:27,821 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:25:27 WrapperNode [2021-12-06 23:25:27,821 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 23:25:27,821 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 23:25:27,822 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 23:25:27,822 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 23:25:27,827 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:25:27" (1/1) ... [2021-12-06 23:25:27,833 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:25:27" (1/1) ... [2021-12-06 23:25:27,850 INFO L137 Inliner]: procedures = 16, calls = 8, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 123 [2021-12-06 23:25:27,850 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 23:25:27,851 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 23:25:27,851 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 23:25:27,851 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 23:25:27,857 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:25:27" (1/1) ... [2021-12-06 23:25:27,857 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:25:27" (1/1) ... [2021-12-06 23:25:27,860 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:25:27" (1/1) ... [2021-12-06 23:25:27,860 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:25:27" (1/1) ... [2021-12-06 23:25:27,864 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:25:27" (1/1) ... [2021-12-06 23:25:27,868 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:25:27" (1/1) ... [2021-12-06 23:25:27,870 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:25:27" (1/1) ... [2021-12-06 23:25:27,872 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 23:25:27,873 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 23:25:27,873 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 23:25:27,873 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 23:25:27,874 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:25:27" (1/1) ... [2021-12-06 23:25:27,879 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 23:25:27,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:25:27,896 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 23:25:27,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 23:25:27,925 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 23:25:27,926 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-06 23:25:27,926 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 23:25:27,926 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 23:25:27,974 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 23:25:27,976 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 23:25:28,158 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 23:25:28,164 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 23:25:28,164 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-06 23:25:28,165 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 11:25:28 BoogieIcfgContainer [2021-12-06 23:25:28,165 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 23:25:28,167 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 23:25:28,167 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 23:25:28,170 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 23:25:28,171 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 11:25:27" (1/3) ... [2021-12-06 23:25:28,171 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e5f93a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 11:25:28, skipping insertion in model container [2021-12-06 23:25:28,172 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:25:27" (2/3) ... [2021-12-06 23:25:28,172 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e5f93a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 11:25:28, skipping insertion in model container [2021-12-06 23:25:28,172 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 11:25:28" (3/3) ... [2021-12-06 23:25:28,174 INFO L111 eAbstractionObserver]: Analyzing ICFG byte_add_1-1.i [2021-12-06 23:25:28,179 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 23:25:28,179 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 23:25:28,218 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 23:25:28,223 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-06 23:25:28,223 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 23:25:28,239 INFO L276 IsEmpty]: Start isEmpty. Operand has 42 states, 40 states have (on average 1.775) internal successors, (71), 41 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:25:28,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-06 23:25:28,244 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:25:28,244 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:25:28,244 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:25:28,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:25:28,248 INFO L85 PathProgramCache]: Analyzing trace with hash 255061167, now seen corresponding path program 1 times [2021-12-06 23:25:28,259 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 23:25:28,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1883309618] [2021-12-06 23:25:28,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:25:28,261 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 23:25:28,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 23:25:28,262 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 23:25:28,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-06 23:25:28,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:25:28,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 1 conjunts are in the unsatisfiable core [2021-12-06 23:25:28,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:25:28,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:25:28,362 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 23:25:28,362 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 23:25:28,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1883309618] [2021-12-06 23:25:28,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1883309618] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:25:28,363 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:25:28,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 23:25:28,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744376968] [2021-12-06 23:25:28,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:25:28,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-06 23:25:28,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 23:25:28,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-06 23:25:28,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 23:25:28,391 INFO L87 Difference]: Start difference. First operand has 42 states, 40 states have (on average 1.775) internal successors, (71), 41 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:25:28,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:25:28,404 INFO L93 Difference]: Finished difference Result 57 states and 92 transitions. [2021-12-06 23:25:28,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-06 23:25:28,406 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-12-06 23:25:28,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:25:28,412 INFO L225 Difference]: With dead ends: 57 [2021-12-06 23:25:28,412 INFO L226 Difference]: Without dead ends: 38 [2021-12-06 23:25:28,414 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 23:25:28,417 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:25:28,418 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:25:28,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-12-06 23:25:28,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-12-06 23:25:28,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.7297297297297298) internal successors, (64), 37 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:25:28,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 64 transitions. [2021-12-06 23:25:28,446 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 64 transitions. Word has length 12 [2021-12-06 23:25:28,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:25:28,446 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 64 transitions. [2021-12-06 23:25:28,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:25:28,447 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 64 transitions. [2021-12-06 23:25:28,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-06 23:25:28,447 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:25:28,447 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:25:28,459 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-12-06 23:25:28,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 23:25:28,648 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:25:28,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:25:28,649 INFO L85 PathProgramCache]: Analyzing trace with hash 1803477009, now seen corresponding path program 1 times [2021-12-06 23:25:28,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 23:25:28,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1849201113] [2021-12-06 23:25:28,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:25:28,650 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 23:25:28,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 23:25:28,652 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 23:25:28,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-06 23:25:28,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:25:28,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 23:25:28,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:25:28,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:25:28,739 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 23:25:28,740 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 23:25:28,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1849201113] [2021-12-06 23:25:28,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1849201113] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:25:28,740 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:25:28,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 23:25:28,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127105669] [2021-12-06 23:25:28,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:25:28,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 23:25:28,742 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 23:25:28,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 23:25:28,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 23:25:28,743 INFO L87 Difference]: Start difference. First operand 38 states and 64 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:25:28,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:25:28,873 INFO L93 Difference]: Finished difference Result 116 states and 201 transitions. [2021-12-06 23:25:28,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 23:25:28,874 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-12-06 23:25:28,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:25:28,876 INFO L225 Difference]: With dead ends: 116 [2021-12-06 23:25:28,876 INFO L226 Difference]: Without dead ends: 88 [2021-12-06 23:25:28,876 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 23:25:28,878 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 66 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:25:28,878 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 152 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 23:25:28,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-12-06 23:25:28,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 81. [2021-12-06 23:25:28,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.625) internal successors, (130), 80 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:25:28,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 130 transitions. [2021-12-06 23:25:28,892 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 130 transitions. Word has length 12 [2021-12-06 23:25:28,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:25:28,892 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 130 transitions. [2021-12-06 23:25:28,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:25:28,893 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 130 transitions. [2021-12-06 23:25:28,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-06 23:25:28,894 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:25:28,894 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:25:28,901 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-12-06 23:25:29,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 23:25:29,096 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:25:29,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:25:29,098 INFO L85 PathProgramCache]: Analyzing trace with hash -1087802014, now seen corresponding path program 1 times [2021-12-06 23:25:29,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 23:25:29,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2018524368] [2021-12-06 23:25:29,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:25:29,102 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 23:25:29,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 23:25:29,105 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 23:25:29,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-06 23:25:29,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:25:29,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 23:25:29,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:25:29,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:25:29,259 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 23:25:29,259 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 23:25:29,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2018524368] [2021-12-06 23:25:29,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2018524368] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:25:29,259 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:25:29,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 23:25:29,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822873683] [2021-12-06 23:25:29,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:25:29,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 23:25:29,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 23:25:29,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 23:25:29,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-06 23:25:29,261 INFO L87 Difference]: Start difference. First operand 81 states and 130 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:25:29,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:25:29,355 INFO L93 Difference]: Finished difference Result 164 states and 271 transitions. [2021-12-06 23:25:29,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 23:25:29,355 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-06 23:25:29,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:25:29,356 INFO L225 Difference]: With dead ends: 164 [2021-12-06 23:25:29,356 INFO L226 Difference]: Without dead ends: 136 [2021-12-06 23:25:29,357 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-06 23:25:29,358 INFO L933 BasicCegarLoop]: 120 mSDtfsCounter, 141 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:25:29,358 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 284 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 23:25:29,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-12-06 23:25:29,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 81. [2021-12-06 23:25:29,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.625) internal successors, (130), 80 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:25:29,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 130 transitions. [2021-12-06 23:25:29,366 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 130 transitions. Word has length 13 [2021-12-06 23:25:29,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:25:29,367 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 130 transitions. [2021-12-06 23:25:29,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:25:29,367 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 130 transitions. [2021-12-06 23:25:29,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-06 23:25:29,367 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:25:29,367 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:25:29,378 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-12-06 23:25:29,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 23:25:29,570 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:25:29,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:25:29,572 INFO L85 PathProgramCache]: Analyzing trace with hash 583572890, now seen corresponding path program 1 times [2021-12-06 23:25:29,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 23:25:29,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [994723089] [2021-12-06 23:25:29,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:25:29,574 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 23:25:29,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 23:25:29,577 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 23:25:29,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-06 23:25:29,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:25:29,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-06 23:25:29,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:25:29,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:25:29,718 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 23:25:29,719 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 23:25:29,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [994723089] [2021-12-06 23:25:29,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [994723089] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:25:29,719 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:25:29,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 23:25:29,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502095279] [2021-12-06 23:25:29,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:25:29,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 23:25:29,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 23:25:29,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 23:25:29,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-06 23:25:29,720 INFO L87 Difference]: Start difference. First operand 81 states and 130 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:25:29,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:25:29,884 INFO L93 Difference]: Finished difference Result 212 states and 341 transitions. [2021-12-06 23:25:29,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 23:25:29,884 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-12-06 23:25:29,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:25:29,886 INFO L225 Difference]: With dead ends: 212 [2021-12-06 23:25:29,886 INFO L226 Difference]: Without dead ends: 184 [2021-12-06 23:25:29,886 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-06 23:25:29,887 INFO L933 BasicCegarLoop]: 164 mSDtfsCounter, 166 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 559 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:25:29,887 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 559 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 23:25:29,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-12-06 23:25:29,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 81. [2021-12-06 23:25:29,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.625) internal successors, (130), 80 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:25:29,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 130 transitions. [2021-12-06 23:25:29,896 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 130 transitions. Word has length 14 [2021-12-06 23:25:29,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:25:29,896 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 130 transitions. [2021-12-06 23:25:29,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:25:29,896 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 130 transitions. [2021-12-06 23:25:29,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-06 23:25:29,897 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:25:29,897 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:25:29,904 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-12-06 23:25:30,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 23:25:30,099 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:25:30,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:25:30,101 INFO L85 PathProgramCache]: Analyzing trace with hash 1392919516, now seen corresponding path program 1 times [2021-12-06 23:25:30,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 23:25:30,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1659145915] [2021-12-06 23:25:30,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:25:30,103 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 23:25:30,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 23:25:30,106 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 23:25:30,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-06 23:25:30,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:25:30,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-06 23:25:30,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:25:30,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:25:30,169 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 23:25:30,169 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 23:25:30,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1659145915] [2021-12-06 23:25:30,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1659145915] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:25:30,170 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:25:30,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 23:25:30,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282416283] [2021-12-06 23:25:30,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:25:30,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 23:25:30,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 23:25:30,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 23:25:30,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-06 23:25:30,171 INFO L87 Difference]: Start difference. First operand 81 states and 130 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:25:30,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:25:30,276 INFO L93 Difference]: Finished difference Result 227 states and 354 transitions. [2021-12-06 23:25:30,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 23:25:30,276 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-12-06 23:25:30,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:25:30,277 INFO L225 Difference]: With dead ends: 227 [2021-12-06 23:25:30,277 INFO L226 Difference]: Without dead ends: 199 [2021-12-06 23:25:30,278 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-06 23:25:30,279 INFO L933 BasicCegarLoop]: 169 mSDtfsCounter, 233 mSDsluCounter, 514 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 683 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:25:30,279 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 683 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 23:25:30,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-12-06 23:25:30,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 87. [2021-12-06 23:25:30,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.5) internal successors, (129), 86 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:25:30,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 129 transitions. [2021-12-06 23:25:30,286 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 129 transitions. Word has length 14 [2021-12-06 23:25:30,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:25:30,287 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 129 transitions. [2021-12-06 23:25:30,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:25:30,287 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 129 transitions. [2021-12-06 23:25:30,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-06 23:25:30,288 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:25:30,288 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] [2021-12-06 23:25:30,295 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-12-06 23:25:30,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 23:25:30,490 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:25:30,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:25:30,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1480128500, now seen corresponding path program 1 times [2021-12-06 23:25:30,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 23:25:30,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1748490722] [2021-12-06 23:25:30,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:25:30,494 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 23:25:30,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 23:25:30,497 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 23:25:30,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-12-06 23:25:30,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:25:30,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 23:25:30,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:25:30,666 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:25:30,666 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 23:25:30,666 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 23:25:30,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1748490722] [2021-12-06 23:25:30,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1748490722] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:25:30,666 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:25:30,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 23:25:30,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154231237] [2021-12-06 23:25:30,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:25:30,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 23:25:30,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 23:25:30,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 23:25:30,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 23:25:30,667 INFO L87 Difference]: Start difference. First operand 87 states and 129 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:25:30,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:25:30,746 INFO L93 Difference]: Finished difference Result 243 states and 358 transitions. [2021-12-06 23:25:30,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 23:25:30,747 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-12-06 23:25:30,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:25:30,748 INFO L225 Difference]: With dead ends: 243 [2021-12-06 23:25:30,748 INFO L226 Difference]: Without dead ends: 173 [2021-12-06 23:25:30,748 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 23:25:30,749 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 70 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:25:30,749 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 161 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 23:25:30,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-12-06 23:25:30,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 97. [2021-12-06 23:25:30,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.4791666666666667) internal successors, (142), 96 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:25:30,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 142 transitions. [2021-12-06 23:25:30,756 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 142 transitions. Word has length 25 [2021-12-06 23:25:30,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:25:30,756 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 142 transitions. [2021-12-06 23:25:30,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:25:30,756 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 142 transitions. [2021-12-06 23:25:30,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-06 23:25:30,757 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:25:30,757 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:25:30,765 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-12-06 23:25:30,958 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 23:25:30,959 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:25:30,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:25:30,961 INFO L85 PathProgramCache]: Analyzing trace with hash -1384042382, now seen corresponding path program 1 times [2021-12-06 23:25:30,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 23:25:30,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [249073892] [2021-12-06 23:25:30,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:25:30,963 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 23:25:30,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 23:25:30,965 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 23:25:30,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-12-06 23:25:31,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:25:31,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-06 23:25:31,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:25:31,133 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 23:25:31,133 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 23:25:31,133 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 23:25:31,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [249073892] [2021-12-06 23:25:31,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [249073892] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:25:31,134 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:25:31,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 23:25:31,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977164913] [2021-12-06 23:25:31,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:25:31,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 23:25:31,135 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 23:25:31,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 23:25:31,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:25:31,136 INFO L87 Difference]: Start difference. First operand 97 states and 142 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:25:31,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:25:31,141 INFO L93 Difference]: Finished difference Result 169 states and 248 transitions. [2021-12-06 23:25:31,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 23:25:31,142 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-12-06 23:25:31,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:25:31,143 INFO L225 Difference]: With dead ends: 169 [2021-12-06 23:25:31,143 INFO L226 Difference]: Without dead ends: 85 [2021-12-06 23:25:31,144 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:25:31,145 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 57 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:25:31,145 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 58 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:25:31,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-12-06 23:25:31,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2021-12-06 23:25:31,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.4523809523809523) internal successors, (122), 84 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:25:31,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 122 transitions. [2021-12-06 23:25:31,152 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 122 transitions. Word has length 26 [2021-12-06 23:25:31,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:25:31,152 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 122 transitions. [2021-12-06 23:25:31,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:25:31,152 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 122 transitions. [2021-12-06 23:25:31,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-06 23:25:31,154 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:25:31,154 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] [2021-12-06 23:25:31,165 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-12-06 23:25:31,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 23:25:31,357 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:25:31,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:25:31,359 INFO L85 PathProgramCache]: Analyzing trace with hash 221982208, now seen corresponding path program 1 times [2021-12-06 23:25:31,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 23:25:31,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [680559514] [2021-12-06 23:25:31,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:25:31,362 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 23:25:31,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 23:25:31,365 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 23:25:31,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-12-06 23:25:31,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:25:31,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 23:25:31,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:25:31,542 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:25:31,542 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 23:25:31,542 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 23:25:31,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [680559514] [2021-12-06 23:25:31,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [680559514] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:25:31,542 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:25:31,543 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 23:25:31,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435981110] [2021-12-06 23:25:31,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:25:31,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 23:25:31,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 23:25:31,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 23:25:31,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 23:25:31,544 INFO L87 Difference]: Start difference. First operand 85 states and 122 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:25:31,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:25:31,614 INFO L93 Difference]: Finished difference Result 150 states and 213 transitions. [2021-12-06 23:25:31,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 23:25:31,615 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-12-06 23:25:31,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:25:31,616 INFO L225 Difference]: With dead ends: 150 [2021-12-06 23:25:31,616 INFO L226 Difference]: Without dead ends: 136 [2021-12-06 23:25:31,616 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 23:25:31,617 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 60 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:25:31,617 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 115 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 69 Invalid, 0 Unknown, 45 Unchecked, 0.1s Time] [2021-12-06 23:25:31,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-12-06 23:25:31,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 121. [2021-12-06 23:25:31,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.4583333333333333) internal successors, (175), 120 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:25:31,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 175 transitions. [2021-12-06 23:25:31,625 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 175 transitions. Word has length 29 [2021-12-06 23:25:31,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:25:31,626 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 175 transitions. [2021-12-06 23:25:31,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:25:31,626 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 175 transitions. [2021-12-06 23:25:31,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-06 23:25:31,628 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:25:31,628 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:25:31,638 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-12-06 23:25:31,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 23:25:31,829 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:25:31,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:25:31,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1570096335, now seen corresponding path program 1 times [2021-12-06 23:25:31,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 23:25:31,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [931698459] [2021-12-06 23:25:31,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:25:31,830 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 23:25:31,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 23:25:31,830 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 23:25:31,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-12-06 23:25:31,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:25:31,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-06 23:25:31,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:25:31,956 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:25:31,956 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 23:25:31,956 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 23:25:31,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [931698459] [2021-12-06 23:25:31,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [931698459] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:25:31,956 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:25:31,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 23:25:31,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654752449] [2021-12-06 23:25:31,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:25:31,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 23:25:31,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 23:25:31,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 23:25:31,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-06 23:25:31,958 INFO L87 Difference]: Start difference. First operand 121 states and 175 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:25:31,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:25:31,996 INFO L93 Difference]: Finished difference Result 210 states and 294 transitions. [2021-12-06 23:25:31,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 23:25:31,997 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-12-06 23:25:31,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:25:31,998 INFO L225 Difference]: With dead ends: 210 [2021-12-06 23:25:31,998 INFO L226 Difference]: Without dead ends: 156 [2021-12-06 23:25:31,999 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-06 23:25:32,000 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 84 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:25:32,000 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 181 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 55 Invalid, 0 Unknown, 54 Unchecked, 0.0s Time] [2021-12-06 23:25:32,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-12-06 23:25:32,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 142. [2021-12-06 23:25:32,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 1.4042553191489362) internal successors, (198), 141 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:25:32,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 198 transitions. [2021-12-06 23:25:32,010 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 198 transitions. Word has length 30 [2021-12-06 23:25:32,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:25:32,011 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 198 transitions. [2021-12-06 23:25:32,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:25:32,011 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 198 transitions. [2021-12-06 23:25:32,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-06 23:25:32,012 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:25:32,013 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] [2021-12-06 23:25:32,023 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (10)] Ended with exit code 0 [2021-12-06 23:25:32,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 23:25:32,213 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:25:32,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:25:32,214 INFO L85 PathProgramCache]: Analyzing trace with hash -1760226409, now seen corresponding path program 1 times [2021-12-06 23:25:32,214 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 23:25:32,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [158920839] [2021-12-06 23:25:32,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:25:32,215 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 23:25:32,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 23:25:32,216 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 23:25:32,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-12-06 23:25:32,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:25:32,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-06 23:25:32,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:25:32,334 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:25:32,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:25:32,411 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:25:32,411 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 23:25:32,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [158920839] [2021-12-06 23:25:32,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [158920839] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:25:32,412 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 23:25:32,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-12-06 23:25:32,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107142428] [2021-12-06 23:25:32,412 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 23:25:32,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-06 23:25:32,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 23:25:32,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-06 23:25:32,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-12-06 23:25:32,414 INFO L87 Difference]: Start difference. First operand 142 states and 198 transitions. Second operand has 12 states, 12 states have (on average 4.5) internal successors, (54), 12 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:25:32,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:25:32,929 INFO L93 Difference]: Finished difference Result 381 states and 580 transitions. [2021-12-06 23:25:32,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 23:25:32,929 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 12 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-12-06 23:25:32,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:25:32,931 INFO L225 Difference]: With dead ends: 381 [2021-12-06 23:25:32,931 INFO L226 Difference]: Without dead ends: 305 [2021-12-06 23:25:32,932 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-12-06 23:25:32,932 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 743 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 1034 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 743 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 1173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 1034 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 23:25:32,932 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [743 Valid, 391 Invalid, 1173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 1034 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 23:25:32,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2021-12-06 23:25:32,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 273. [2021-12-06 23:25:32,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 272 states have (on average 1.4485294117647058) internal successors, (394), 272 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:25:32,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 394 transitions. [2021-12-06 23:25:32,940 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 394 transitions. Word has length 31 [2021-12-06 23:25:32,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:25:32,941 INFO L470 AbstractCegarLoop]: Abstraction has 273 states and 394 transitions. [2021-12-06 23:25:32,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 12 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:25:32,941 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 394 transitions. [2021-12-06 23:25:32,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-06 23:25:32,945 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:25:32,945 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:25:32,955 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (11)] Ended with exit code 0 [2021-12-06 23:25:33,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 23:25:33,146 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:25:33,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:25:33,146 INFO L85 PathProgramCache]: Analyzing trace with hash -1900775019, now seen corresponding path program 1 times [2021-12-06 23:25:33,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 23:25:33,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [612588171] [2021-12-06 23:25:33,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:25:33,147 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 23:25:33,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 23:25:33,148 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 23:25:33,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-12-06 23:25:33,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:25:33,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 23:25:33,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:25:33,248 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:25:33,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:25:33,302 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:25:33,302 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 23:25:33,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [612588171] [2021-12-06 23:25:33,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [612588171] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:25:33,303 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 23:25:33,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-12-06 23:25:33,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738389589] [2021-12-06 23:25:33,303 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 23:25:33,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 23:25:33,303 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 23:25:33,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 23:25:33,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-06 23:25:33,304 INFO L87 Difference]: Start difference. First operand 273 states and 394 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:25:33,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:25:33,477 INFO L93 Difference]: Finished difference Result 732 states and 1124 transitions. [2021-12-06 23:25:33,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 23:25:33,477 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-12-06 23:25:33,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:25:33,480 INFO L225 Difference]: With dead ends: 732 [2021-12-06 23:25:33,480 INFO L226 Difference]: Without dead ends: 498 [2021-12-06 23:25:33,480 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-12-06 23:25:33,481 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 405 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:25:33,481 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [405 Valid, 69 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 23:25:33,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-12-06 23:25:33,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 396. [2021-12-06 23:25:33,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 395 states have (on average 1.440506329113924) internal successors, (569), 395 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:25:33,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 569 transitions. [2021-12-06 23:25:33,494 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 569 transitions. Word has length 31 [2021-12-06 23:25:33,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:25:33,494 INFO L470 AbstractCegarLoop]: Abstraction has 396 states and 569 transitions. [2021-12-06 23:25:33,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:25:33,494 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 569 transitions. [2021-12-06 23:25:33,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-06 23:25:33,496 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:25:33,496 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:25:33,503 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2021-12-06 23:25:33,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 23:25:33,697 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:25:33,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:25:33,697 INFO L85 PathProgramCache]: Analyzing trace with hash 1235829048, now seen corresponding path program 1 times [2021-12-06 23:25:33,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 23:25:33,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1698134398] [2021-12-06 23:25:33,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:25:33,698 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 23:25:33,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 23:25:33,698 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 23:25:33,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-12-06 23:25:33,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:25:33,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-06 23:25:33,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:25:33,825 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 53 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-06 23:25:33,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:25:33,928 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 49 proven. 8 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-06 23:25:33,928 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 23:25:33,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1698134398] [2021-12-06 23:25:33,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1698134398] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:25:33,928 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 23:25:33,928 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-12-06 23:25:33,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402297872] [2021-12-06 23:25:33,928 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 23:25:33,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 23:25:33,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 23:25:33,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 23:25:33,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-12-06 23:25:33,929 INFO L87 Difference]: Start difference. First operand 396 states and 569 transitions. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:25:34,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:25:34,152 INFO L93 Difference]: Finished difference Result 1331 states and 1910 transitions. [2021-12-06 23:25:34,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 23:25:34,153 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-12-06 23:25:34,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:25:34,159 INFO L225 Difference]: With dead ends: 1331 [2021-12-06 23:25:34,159 INFO L226 Difference]: Without dead ends: 958 [2021-12-06 23:25:34,160 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2021-12-06 23:25:34,160 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 280 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:25:34,160 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [280 Valid, 400 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 23:25:34,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 958 states. [2021-12-06 23:25:34,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 958 to 599. [2021-12-06 23:25:34,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 599 states, 598 states have (on average 1.4866220735785953) internal successors, (889), 598 states have internal predecessors, (889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:25:34,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 889 transitions. [2021-12-06 23:25:34,181 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 889 transitions. Word has length 70 [2021-12-06 23:25:34,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:25:34,182 INFO L470 AbstractCegarLoop]: Abstraction has 599 states and 889 transitions. [2021-12-06 23:25:34,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:25:34,182 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 889 transitions. [2021-12-06 23:25:34,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-06 23:25:34,183 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:25:34,183 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:25:34,190 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-12-06 23:25:34,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 23:25:34,384 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:25:34,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:25:34,385 INFO L85 PathProgramCache]: Analyzing trace with hash 464635188, now seen corresponding path program 1 times [2021-12-06 23:25:34,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 23:25:34,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [133908518] [2021-12-06 23:25:34,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:25:34,388 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 23:25:34,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 23:25:34,390 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 23:25:34,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-12-06 23:25:34,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:25:34,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-06 23:25:34,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:25:34,616 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 65 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-06 23:25:34,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:25:34,702 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 68 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-06 23:25:34,702 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 23:25:34,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [133908518] [2021-12-06 23:25:34,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [133908518] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:25:34,703 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 23:25:34,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2021-12-06 23:25:34,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519741243] [2021-12-06 23:25:34,703 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 23:25:34,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 23:25:34,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 23:25:34,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 23:25:34,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-12-06 23:25:34,704 INFO L87 Difference]: Start difference. First operand 599 states and 889 transitions. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:25:34,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:25:34,879 INFO L93 Difference]: Finished difference Result 1536 states and 2181 transitions. [2021-12-06 23:25:34,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 23:25:34,880 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-12-06 23:25:34,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:25:34,884 INFO L225 Difference]: With dead ends: 1536 [2021-12-06 23:25:34,884 INFO L226 Difference]: Without dead ends: 960 [2021-12-06 23:25:34,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-12-06 23:25:34,885 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 235 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:25:34,886 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [235 Valid, 364 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 23:25:34,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 960 states. [2021-12-06 23:25:34,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 960 to 540. [2021-12-06 23:25:34,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 539 states have (on average 1.4267161410018554) internal successors, (769), 539 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:25:34,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 769 transitions. [2021-12-06 23:25:34,905 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 769 transitions. Word has length 70 [2021-12-06 23:25:34,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:25:34,905 INFO L470 AbstractCegarLoop]: Abstraction has 540 states and 769 transitions. [2021-12-06 23:25:34,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:25:34,905 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 769 transitions. [2021-12-06 23:25:34,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-06 23:25:34,906 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:25:34,906 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:25:34,917 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-12-06 23:25:35,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 23:25:35,107 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:25:35,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:25:35,107 INFO L85 PathProgramCache]: Analyzing trace with hash 605183798, now seen corresponding path program 2 times [2021-12-06 23:25:35,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 23:25:35,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1736643413] [2021-12-06 23:25:35,108 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 23:25:35,108 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 23:25:35,108 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 23:25:35,109 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 23:25:35,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-12-06 23:25:35,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 23:25:35,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:25:35,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 41 conjunts are in the unsatisfiable core [2021-12-06 23:25:35,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:25:37,469 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:25:37,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:25:40,158 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:25:40,158 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 23:25:40,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1736643413] [2021-12-06 23:25:40,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1736643413] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:25:40,158 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 23:25:40,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 44 [2021-12-06 23:25:40,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425021899] [2021-12-06 23:25:40,158 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 23:25:40,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-12-06 23:25:40,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 23:25:40,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-12-06 23:25:40,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1750, Unknown=0, NotChecked=0, Total=1892 [2021-12-06 23:25:40,160 INFO L87 Difference]: Start difference. First operand 540 states and 769 transitions. Second operand has 44 states, 44 states have (on average 3.1363636363636362) internal successors, (138), 44 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:25:54,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:25:54,531 INFO L93 Difference]: Finished difference Result 1608 states and 2176 transitions. [2021-12-06 23:25:54,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-12-06 23:25:54,532 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 3.1363636363636362) internal successors, (138), 44 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-12-06 23:25:54,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:25:54,538 INFO L225 Difference]: With dead ends: 1608 [2021-12-06 23:25:54,538 INFO L226 Difference]: Without dead ends: 1500 [2021-12-06 23:25:54,542 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3336 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=2709, Invalid=13547, Unknown=0, NotChecked=0, Total=16256 [2021-12-06 23:25:54,543 INFO L933 BasicCegarLoop]: 450 mSDtfsCounter, 2317 mSDsluCounter, 8944 mSDsCounter, 0 mSdLazyCounter, 5454 mSolverCounterSat, 325 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2317 SdHoareTripleChecker+Valid, 9394 SdHoareTripleChecker+Invalid, 5779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 325 IncrementalHoareTripleChecker+Valid, 5454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2021-12-06 23:25:54,543 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2317 Valid, 9394 Invalid, 5779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [325 Valid, 5454 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2021-12-06 23:25:54,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1500 states. [2021-12-06 23:25:54,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1500 to 895. [2021-12-06 23:25:54,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 895 states, 894 states have (on average 1.4407158836689038) internal successors, (1288), 894 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:25:54,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 895 states to 895 states and 1288 transitions. [2021-12-06 23:25:54,579 INFO L78 Accepts]: Start accepts. Automaton has 895 states and 1288 transitions. Word has length 70 [2021-12-06 23:25:54,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:25:54,579 INFO L470 AbstractCegarLoop]: Abstraction has 895 states and 1288 transitions. [2021-12-06 23:25:54,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 3.1363636363636362) internal successors, (138), 44 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:25:54,580 INFO L276 IsEmpty]: Start isEmpty. Operand 895 states and 1288 transitions. [2021-12-06 23:25:54,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-06 23:25:54,581 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:25:54,581 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:25:54,591 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-12-06 23:25:54,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 23:25:54,781 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:25:54,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:25:54,782 INFO L85 PathProgramCache]: Analyzing trace with hash 824038516, now seen corresponding path program 1 times [2021-12-06 23:25:54,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 23:25:54,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [321465800] [2021-12-06 23:25:54,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:25:54,782 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 23:25:54,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 23:25:54,783 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 23:25:54,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-12-06 23:25:54,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:25:54,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 23:25:54,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:25:54,965 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 58 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-06 23:25:54,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:25:55,027 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 58 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-06 23:25:55,027 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 23:25:55,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [321465800] [2021-12-06 23:25:55,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [321465800] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:25:55,028 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 23:25:55,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-12-06 23:25:55,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185861320] [2021-12-06 23:25:55,028 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 23:25:55,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 23:25:55,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 23:25:55,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 23:25:55,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-06 23:25:55,029 INFO L87 Difference]: Start difference. First operand 895 states and 1288 transitions. Second operand has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:25:55,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:25:55,109 INFO L93 Difference]: Finished difference Result 1867 states and 2705 transitions. [2021-12-06 23:25:55,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 23:25:55,109 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-12-06 23:25:55,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:25:55,113 INFO L225 Difference]: With dead ends: 1867 [2021-12-06 23:25:55,113 INFO L226 Difference]: Without dead ends: 992 [2021-12-06 23:25:55,114 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 132 SyntacticMatches, 5 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-06 23:25:55,114 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 25 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 116 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:25:55,115 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 84 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 110 Invalid, 0 Unknown, 116 Unchecked, 0.0s Time] [2021-12-06 23:25:55,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 992 states. [2021-12-06 23:25:55,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 992 to 840. [2021-12-06 23:25:55,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 840 states, 839 states have (on average 1.4159713945172825) internal successors, (1188), 839 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:25:55,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 840 states to 840 states and 1188 transitions. [2021-12-06 23:25:55,155 INFO L78 Accepts]: Start accepts. Automaton has 840 states and 1188 transitions. Word has length 70 [2021-12-06 23:25:55,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:25:55,155 INFO L470 AbstractCegarLoop]: Abstraction has 840 states and 1188 transitions. [2021-12-06 23:25:55,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:25:55,155 INFO L276 IsEmpty]: Start isEmpty. Operand 840 states and 1188 transitions. [2021-12-06 23:25:55,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-06 23:25:55,157 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:25:55,157 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-06 23:25:55,164 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-12-06 23:25:55,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 23:25:55,358 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:25:55,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:25:55,358 INFO L85 PathProgramCache]: Analyzing trace with hash -1235371034, now seen corresponding path program 1 times [2021-12-06 23:25:55,359 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 23:25:55,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1404798893] [2021-12-06 23:25:55,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:25:55,359 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 23:25:55,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 23:25:55,360 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 23:25:55,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-12-06 23:25:55,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:25:55,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 43 conjunts are in the unsatisfiable core [2021-12-06 23:25:55,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:25:58,047 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:25:58,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:26:01,792 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:26:01,792 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 23:26:01,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1404798893] [2021-12-06 23:26:01,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1404798893] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:26:01,792 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 23:26:01,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-12-06 23:26:01,793 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5372208] [2021-12-06 23:26:01,793 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 23:26:01,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-12-06 23:26:01,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 23:26:01,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-12-06 23:26:01,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1921, Unknown=0, NotChecked=0, Total=2070 [2021-12-06 23:26:01,797 INFO L87 Difference]: Start difference. First operand 840 states and 1188 transitions. Second operand has 46 states, 46 states have (on average 3.1739130434782608) internal successors, (146), 46 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:26:53,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:26:53,357 INFO L93 Difference]: Finished difference Result 3057 states and 3998 transitions. [2021-12-06 23:26:53,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 197 states. [2021-12-06 23:26:53,358 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 3.1739130434782608) internal successors, (146), 46 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-12-06 23:26:53,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:26:53,368 INFO L225 Difference]: With dead ends: 3057 [2021-12-06 23:26:53,368 INFO L226 Difference]: Without dead ends: 2923 [2021-12-06 23:26:53,385 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 238 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18045 ImplicationChecksByTransitivity, 46.0s TimeCoverageRelationStatistics Valid=7455, Invalid=49905, Unknown=0, NotChecked=0, Total=57360 [2021-12-06 23:26:53,385 INFO L933 BasicCegarLoop]: 676 mSDtfsCounter, 2557 mSDsluCounter, 14166 mSDsCounter, 0 mSdLazyCounter, 8422 mSolverCounterSat, 469 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2557 SdHoareTripleChecker+Valid, 14842 SdHoareTripleChecker+Invalid, 8891 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 469 IncrementalHoareTripleChecker+Valid, 8422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.2s IncrementalHoareTripleChecker+Time [2021-12-06 23:26:53,385 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2557 Valid, 14842 Invalid, 8891 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [469 Valid, 8422 Invalid, 0 Unknown, 0 Unchecked, 9.2s Time] [2021-12-06 23:26:53,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2923 states. [2021-12-06 23:26:53,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2923 to 1518. [2021-12-06 23:26:53,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1518 states, 1517 states have (on average 1.3948582729070533) internal successors, (2116), 1517 states have internal predecessors, (2116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:26:53,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1518 states to 1518 states and 2116 transitions. [2021-12-06 23:26:53,455 INFO L78 Accepts]: Start accepts. Automaton has 1518 states and 2116 transitions. Word has length 74 [2021-12-06 23:26:53,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:26:53,455 INFO L470 AbstractCegarLoop]: Abstraction has 1518 states and 2116 transitions. [2021-12-06 23:26:53,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 3.1739130434782608) internal successors, (146), 46 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:26:53,456 INFO L276 IsEmpty]: Start isEmpty. Operand 1518 states and 2116 transitions. [2021-12-06 23:26:53,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-06 23:26:53,457 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:26:53,457 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-06 23:26:53,468 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2021-12-06 23:26:53,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 23:26:53,659 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:26:53,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:26:53,660 INFO L85 PathProgramCache]: Analyzing trace with hash -877944922, now seen corresponding path program 1 times [2021-12-06 23:26:53,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 23:26:53,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [890718497] [2021-12-06 23:26:53,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:26:53,662 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 23:26:53,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 23:26:53,665 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 23:26:53,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-12-06 23:26:53,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:26:53,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 41 conjunts are in the unsatisfiable core [2021-12-06 23:26:53,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:26:56,413 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:26:56,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:26:59,591 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:26:59,591 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 23:26:59,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [890718497] [2021-12-06 23:26:59,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [890718497] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:26:59,591 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 23:26:59,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-12-06 23:26:59,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783715925] [2021-12-06 23:26:59,591 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 23:26:59,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-12-06 23:26:59,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 23:26:59,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-12-06 23:26:59,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1933, Unknown=0, NotChecked=0, Total=2070 [2021-12-06 23:26:59,592 INFO L87 Difference]: Start difference. First operand 1518 states and 2116 transitions. Second operand has 46 states, 46 states have (on average 3.1739130434782608) internal successors, (146), 46 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:27:26,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:27:26,072 INFO L93 Difference]: Finished difference Result 3805 states and 5069 transitions. [2021-12-06 23:27:26,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-12-06 23:27:26,073 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 3.1739130434782608) internal successors, (146), 46 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-12-06 23:27:26,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:27:26,083 INFO L225 Difference]: With dead ends: 3805 [2021-12-06 23:27:26,083 INFO L226 Difference]: Without dead ends: 3011 [2021-12-06 23:27:26,085 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5497 ImplicationChecksByTransitivity, 22.6s TimeCoverageRelationStatistics Valid=2774, Invalid=19278, Unknown=0, NotChecked=0, Total=22052 [2021-12-06 23:27:26,085 INFO L933 BasicCegarLoop]: 494 mSDtfsCounter, 1826 mSDsluCounter, 10640 mSDsCounter, 0 mSdLazyCounter, 6606 mSolverCounterSat, 298 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1826 SdHoareTripleChecker+Valid, 11134 SdHoareTripleChecker+Invalid, 6904 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 298 IncrementalHoareTripleChecker+Valid, 6606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:27:26,086 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1826 Valid, 11134 Invalid, 6904 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [298 Valid, 6606 Invalid, 0 Unknown, 0 Unchecked, 7.0s Time] [2021-12-06 23:27:26,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3011 states. [2021-12-06 23:27:26,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3011 to 1710. [2021-12-06 23:27:26,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1710 states, 1709 states have (on average 1.3973083674663547) internal successors, (2388), 1709 states have internal predecessors, (2388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:27:26,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1710 states to 1710 states and 2388 transitions. [2021-12-06 23:27:26,160 INFO L78 Accepts]: Start accepts. Automaton has 1710 states and 2388 transitions. Word has length 74 [2021-12-06 23:27:26,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:27:26,160 INFO L470 AbstractCegarLoop]: Abstraction has 1710 states and 2388 transitions. [2021-12-06 23:27:26,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 3.1739130434782608) internal successors, (146), 46 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:27:26,161 INFO L276 IsEmpty]: Start isEmpty. Operand 1710 states and 2388 transitions. [2021-12-06 23:27:26,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-12-06 23:27:26,162 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:27:26,162 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:27:26,173 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2021-12-06 23:27:26,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 23:27:26,364 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:27:26,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:27:26,366 INFO L85 PathProgramCache]: Analyzing trace with hash -904299993, now seen corresponding path program 1 times [2021-12-06 23:27:26,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 23:27:26,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1373521285] [2021-12-06 23:27:26,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:27:26,368 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 23:27:26,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 23:27:26,370 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 23:27:26,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-12-06 23:27:26,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:26,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-06 23:27:26,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:27:26,643 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 23 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:27:26,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:27:26,762 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 23 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:27:26,762 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 23:27:26,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1373521285] [2021-12-06 23:27:26,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1373521285] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:27:26,762 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 23:27:26,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-12-06 23:27:26,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478166201] [2021-12-06 23:27:26,762 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 23:27:26,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-06 23:27:26,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 23:27:26,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-06 23:27:26,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-12-06 23:27:26,763 INFO L87 Difference]: Start difference. First operand 1710 states and 2388 transitions. Second operand has 12 states, 12 states have (on average 10.583333333333334) internal successors, (127), 12 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:27:27,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:27:27,105 INFO L93 Difference]: Finished difference Result 4066 states and 5741 transitions. [2021-12-06 23:27:27,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-06 23:27:27,105 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 10.583333333333334) internal successors, (127), 12 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-12-06 23:27:27,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:27:27,113 INFO L225 Difference]: With dead ends: 4066 [2021-12-06 23:27:27,113 INFO L226 Difference]: Without dead ends: 2367 [2021-12-06 23:27:27,115 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2021-12-06 23:27:27,115 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 71 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 121 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:27:27,116 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 191 Invalid, 469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 311 Invalid, 0 Unknown, 121 Unchecked, 0.1s Time] [2021-12-06 23:27:27,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2367 states. [2021-12-06 23:27:27,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2367 to 2181. [2021-12-06 23:27:27,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2181 states, 2180 states have (on average 1.3944954128440368) internal successors, (3040), 2180 states have internal predecessors, (3040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:27:27,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2181 states to 2181 states and 3040 transitions. [2021-12-06 23:27:27,207 INFO L78 Accepts]: Start accepts. Automaton has 2181 states and 3040 transitions. Word has length 76 [2021-12-06 23:27:27,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:27:27,208 INFO L470 AbstractCegarLoop]: Abstraction has 2181 states and 3040 transitions. [2021-12-06 23:27:27,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.583333333333334) internal successors, (127), 12 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:27:27,208 INFO L276 IsEmpty]: Start isEmpty. Operand 2181 states and 3040 transitions. [2021-12-06 23:27:27,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-06 23:27:27,210 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:27:27,210 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-06 23:27:27,220 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2021-12-06 23:27:27,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 23:27:27,411 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:27:27,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:27:27,412 INFO L85 PathProgramCache]: Analyzing trace with hash -1461199560, now seen corresponding path program 1 times [2021-12-06 23:27:27,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 23:27:27,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1708603325] [2021-12-06 23:27:27,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:27:27,414 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 23:27:27,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 23:27:27,416 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 23:27:27,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-12-06 23:27:27,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:27,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 46 conjunts are in the unsatisfiable core [2021-12-06 23:27:27,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:27:30,484 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:27:30,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:27:35,786 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:27:35,786 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 23:27:35,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1708603325] [2021-12-06 23:27:35,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1708603325] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:27:35,787 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 23:27:35,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2021-12-06 23:27:35,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408868313] [2021-12-06 23:27:35,787 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 23:27:35,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-12-06 23:27:35,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 23:27:35,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-12-06 23:27:35,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=2275, Unknown=0, NotChecked=0, Total=2450 [2021-12-06 23:27:35,788 INFO L87 Difference]: Start difference. First operand 2181 states and 3040 transitions. Second operand has 50 states, 50 states have (on average 3.04) internal successors, (152), 50 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:28:26,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:28:26,638 INFO L93 Difference]: Finished difference Result 4503 states and 6018 transitions. [2021-12-06 23:28:26,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2021-12-06 23:28:26,639 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.04) internal successors, (152), 50 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-12-06 23:28:26,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:28:26,653 INFO L225 Difference]: With dead ends: 4503 [2021-12-06 23:28:26,653 INFO L226 Difference]: Without dead ends: 4253 [2021-12-06 23:28:26,656 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10620 ImplicationChecksByTransitivity, 45.7s TimeCoverageRelationStatistics Valid=4758, Invalid=33854, Unknown=0, NotChecked=0, Total=38612 [2021-12-06 23:28:26,657 INFO L933 BasicCegarLoop]: 423 mSDtfsCounter, 2224 mSDsluCounter, 11320 mSDsCounter, 0 mSdLazyCounter, 7197 mSolverCounterSat, 409 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2224 SdHoareTripleChecker+Valid, 11743 SdHoareTripleChecker+Invalid, 7606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 409 IncrementalHoareTripleChecker+Valid, 7197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.2s IncrementalHoareTripleChecker+Time [2021-12-06 23:28:26,657 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2224 Valid, 11743 Invalid, 7606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [409 Valid, 7197 Invalid, 0 Unknown, 0 Unchecked, 10.2s Time] [2021-12-06 23:28:26,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4253 states. [2021-12-06 23:28:26,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4253 to 2972. [2021-12-06 23:28:26,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2972 states, 2971 states have (on average 1.3991921911814205) internal successors, (4157), 2971 states have internal predecessors, (4157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:28:26,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2972 states to 2972 states and 4157 transitions. [2021-12-06 23:28:26,796 INFO L78 Accepts]: Start accepts. Automaton has 2972 states and 4157 transitions. Word has length 77 [2021-12-06 23:28:26,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:28:26,796 INFO L470 AbstractCegarLoop]: Abstraction has 2972 states and 4157 transitions. [2021-12-06 23:28:26,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.04) internal successors, (152), 50 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:28:26,796 INFO L276 IsEmpty]: Start isEmpty. Operand 2972 states and 4157 transitions. [2021-12-06 23:28:26,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-06 23:28:26,799 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:28:26,799 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-06 23:28:26,806 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2021-12-06 23:28:26,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 23:28:27,000 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:28:27,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:28:27,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1072504456, now seen corresponding path program 2 times [2021-12-06 23:28:27,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 23:28:27,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1404918155] [2021-12-06 23:28:27,003 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 23:28:27,003 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 23:28:27,004 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 23:28:27,006 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 23:28:27,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-12-06 23:28:27,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 23:28:27,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:28:27,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 44 conjunts are in the unsatisfiable core [2021-12-06 23:28:27,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:28:30,413 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:28:30,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:28:35,047 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:28:35,047 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 23:28:35,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1404918155] [2021-12-06 23:28:35,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1404918155] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:28:35,047 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 23:28:35,047 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2021-12-06 23:28:35,047 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283230136] [2021-12-06 23:28:35,047 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 23:28:35,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-12-06 23:28:35,048 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 23:28:35,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-12-06 23:28:35,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=2268, Unknown=0, NotChecked=0, Total=2450 [2021-12-06 23:28:35,048 INFO L87 Difference]: Start difference. First operand 2972 states and 4157 transitions. Second operand has 50 states, 50 states have (on average 3.04) internal successors, (152), 50 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:30:33,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:30:33,168 INFO L93 Difference]: Finished difference Result 10598 states and 14300 transitions. [2021-12-06 23:30:33,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 296 states. [2021-12-06 23:30:33,169 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.04) internal successors, (152), 50 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-12-06 23:30:33,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:30:33,202 INFO L225 Difference]: With dead ends: 10598 [2021-12-06 23:30:33,202 INFO L226 Difference]: Without dead ends: 9542 [2021-12-06 23:30:33,209 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 445 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 341 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42305 ImplicationChecksByTransitivity, 104.1s TimeCoverageRelationStatistics Valid=12649, Invalid=104657, Unknown=0, NotChecked=0, Total=117306 [2021-12-06 23:30:33,210 INFO L933 BasicCegarLoop]: 794 mSDtfsCounter, 3147 mSDsluCounter, 17293 mSDsCounter, 0 mSdLazyCounter, 11433 mSolverCounterSat, 912 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3147 SdHoareTripleChecker+Valid, 18087 SdHoareTripleChecker+Invalid, 12345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 912 IncrementalHoareTripleChecker+Valid, 11433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.6s IncrementalHoareTripleChecker+Time [2021-12-06 23:30:33,210 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3147 Valid, 18087 Invalid, 12345 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [912 Valid, 11433 Invalid, 0 Unknown, 0 Unchecked, 17.6s Time] [2021-12-06 23:30:33,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9542 states. [2021-12-06 23:30:33,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9542 to 5979. [2021-12-06 23:30:33,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5979 states, 5978 states have (on average 1.4232184677149549) internal successors, (8508), 5978 states have internal predecessors, (8508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:30:33,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5979 states to 5979 states and 8508 transitions. [2021-12-06 23:30:33,504 INFO L78 Accepts]: Start accepts. Automaton has 5979 states and 8508 transitions. Word has length 77 [2021-12-06 23:30:33,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:30:33,505 INFO L470 AbstractCegarLoop]: Abstraction has 5979 states and 8508 transitions. [2021-12-06 23:30:33,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.04) internal successors, (152), 50 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:30:33,505 INFO L276 IsEmpty]: Start isEmpty. Operand 5979 states and 8508 transitions. [2021-12-06 23:30:33,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-06 23:30:33,508 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:30:33,508 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-06 23:30:33,515 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-12-06 23:30:33,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 23:30:33,709 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:30:33,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:30:33,710 INFO L85 PathProgramCache]: Analyzing trace with hash -652353288, now seen corresponding path program 3 times [2021-12-06 23:30:33,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 23:30:33,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [408475910] [2021-12-06 23:30:33,711 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 23:30:33,712 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 23:30:33,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 23:30:33,714 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 23:30:33,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-12-06 23:30:33,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-12-06 23:30:33,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:30:33,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 44 conjunts are in the unsatisfiable core [2021-12-06 23:30:33,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:30:36,964 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:30:36,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:30:41,297 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:30:41,297 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 23:30:41,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [408475910] [2021-12-06 23:30:41,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [408475910] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:30:41,298 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 23:30:41,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 49 [2021-12-06 23:30:41,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511578007] [2021-12-06 23:30:41,298 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 23:30:41,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-12-06 23:30:41,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 23:30:41,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-12-06 23:30:41,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=2197, Unknown=0, NotChecked=0, Total=2352 [2021-12-06 23:30:41,299 INFO L87 Difference]: Start difference. First operand 5979 states and 8508 transitions. Second operand has 49 states, 49 states have (on average 3.1020408163265305) internal successors, (152), 49 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:32:10,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:32:10,422 INFO L93 Difference]: Finished difference Result 16630 states and 22954 transitions. [2021-12-06 23:32:10,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 213 states. [2021-12-06 23:32:10,423 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 3.1020408163265305) internal successors, (152), 49 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-12-06 23:32:10,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:32:10,439 INFO L225 Difference]: With dead ends: 16630 [2021-12-06 23:32:10,439 INFO L226 Difference]: Without dead ends: 12574 [2021-12-06 23:32:10,445 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 257 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22186 ImplicationChecksByTransitivity, 76.9s TimeCoverageRelationStatistics Valid=10059, Invalid=56763, Unknown=0, NotChecked=0, Total=66822 [2021-12-06 23:32:10,446 INFO L933 BasicCegarLoop]: 620 mSDtfsCounter, 2750 mSDsluCounter, 17072 mSDsCounter, 0 mSdLazyCounter, 11097 mSolverCounterSat, 699 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2750 SdHoareTripleChecker+Valid, 17692 SdHoareTripleChecker+Invalid, 11796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 699 IncrementalHoareTripleChecker+Valid, 11097 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.6s IncrementalHoareTripleChecker+Time [2021-12-06 23:32:10,446 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2750 Valid, 17692 Invalid, 11796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [699 Valid, 11097 Invalid, 0 Unknown, 0 Unchecked, 15.6s Time] [2021-12-06 23:32:10,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12574 states. [2021-12-06 23:32:10,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12574 to 8030. [2021-12-06 23:32:10,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8030 states, 8029 states have (on average 1.4294432681529456) internal successors, (11477), 8029 states have internal predecessors, (11477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:32:10,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8030 states to 8030 states and 11477 transitions. [2021-12-06 23:32:10,858 INFO L78 Accepts]: Start accepts. Automaton has 8030 states and 11477 transitions. Word has length 77 [2021-12-06 23:32:10,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:32:10,859 INFO L470 AbstractCegarLoop]: Abstraction has 8030 states and 11477 transitions. [2021-12-06 23:32:10,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 3.1020408163265305) internal successors, (152), 49 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:32:10,859 INFO L276 IsEmpty]: Start isEmpty. Operand 8030 states and 11477 transitions. [2021-12-06 23:32:10,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-06 23:32:10,862 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:32:10,862 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 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] [2021-12-06 23:32:10,871 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-12-06 23:32:11,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 23:32:11,063 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:32:11,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:32:11,063 INFO L85 PathProgramCache]: Analyzing trace with hash -305352451, now seen corresponding path program 1 times [2021-12-06 23:32:11,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 23:32:11,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [822314477] [2021-12-06 23:32:11,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:32:11,064 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 23:32:11,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 23:32:11,064 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 23:32:11,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-12-06 23:32:11,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:32:11,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-06 23:32:11,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:32:11,557 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 59 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:32:11,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:32:12,118 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 37 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:32:12,118 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 23:32:12,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [822314477] [2021-12-06 23:32:12,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [822314477] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:32:12,118 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 23:32:12,118 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-12-06 23:32:12,118 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000409977] [2021-12-06 23:32:12,118 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 23:32:12,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-06 23:32:12,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 23:32:12,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-06 23:32:12,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=428, Unknown=0, NotChecked=0, Total=552 [2021-12-06 23:32:12,119 INFO L87 Difference]: Start difference. First operand 8030 states and 11477 transitions. Second operand has 24 states, 24 states have (on average 5.958333333333333) internal successors, (143), 24 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:32:13,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:32:13,135 INFO L93 Difference]: Finished difference Result 9242 states and 13046 transitions. [2021-12-06 23:32:13,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-06 23:32:13,136 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.958333333333333) internal successors, (143), 24 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-12-06 23:32:13,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:32:13,145 INFO L225 Difference]: With dead ends: 9242 [2021-12-06 23:32:13,145 INFO L226 Difference]: Without dead ends: 8491 [2021-12-06 23:32:13,147 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=237, Invalid=885, Unknown=0, NotChecked=0, Total=1122 [2021-12-06 23:32:13,147 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 145 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 313 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 23:32:13,147 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 219 Invalid, 618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 286 Invalid, 0 Unknown, 313 Unchecked, 0.3s Time] [2021-12-06 23:32:13,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8491 states. [2021-12-06 23:32:13,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8491 to 8354. [2021-12-06 23:32:13,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8354 states, 8353 states have (on average 1.4181731114569616) internal successors, (11846), 8353 states have internal predecessors, (11846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:32:13,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8354 states to 8354 states and 11846 transitions. [2021-12-06 23:32:13,558 INFO L78 Accepts]: Start accepts. Automaton has 8354 states and 11846 transitions. Word has length 79 [2021-12-06 23:32:13,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:32:13,559 INFO L470 AbstractCegarLoop]: Abstraction has 8354 states and 11846 transitions. [2021-12-06 23:32:13,559 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.958333333333333) internal successors, (143), 24 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:32:13,559 INFO L276 IsEmpty]: Start isEmpty. Operand 8354 states and 11846 transitions. [2021-12-06 23:32:13,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-12-06 23:32:13,562 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:32:13,562 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:32:13,569 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (23)] Ended with exit code 0 [2021-12-06 23:32:13,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 23:32:13,764 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:32:13,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:32:13,765 INFO L85 PathProgramCache]: Analyzing trace with hash -1794630633, now seen corresponding path program 1 times [2021-12-06 23:32:13,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 23:32:13,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2095283574] [2021-12-06 23:32:13,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:32:13,767 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 23:32:13,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 23:32:13,769 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 23:32:13,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-12-06 23:32:13,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:32:13,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 46 conjunts are in the unsatisfiable core [2021-12-06 23:32:13,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:32:17,534 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:32:17,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:32:23,543 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:32:23,543 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 23:32:23,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2095283574] [2021-12-06 23:32:23,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2095283574] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:32:23,543 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 23:32:23,543 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2021-12-06 23:32:23,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604717564] [2021-12-06 23:32:23,544 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 23:32:23,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-12-06 23:32:23,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 23:32:23,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-12-06 23:32:23,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=2280, Unknown=0, NotChecked=0, Total=2450 [2021-12-06 23:32:23,544 INFO L87 Difference]: Start difference. First operand 8354 states and 11846 transitions. Second operand has 50 states, 50 states have (on average 3.16) internal successors, (158), 50 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:35:23,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:35:23,231 INFO L93 Difference]: Finished difference Result 14860 states and 20259 transitions. [2021-12-06 23:35:23,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 357 states. [2021-12-06 23:35:23,232 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.16) internal successors, (158), 50 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-12-06 23:35:23,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:35:23,250 INFO L225 Difference]: With dead ends: 14860 [2021-12-06 23:35:23,250 INFO L226 Difference]: Without dead ends: 14622 [2021-12-06 23:35:23,258 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 511 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 401 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63894 ImplicationChecksByTransitivity, 159.9s TimeCoverageRelationStatistics Valid=17280, Invalid=144726, Unknown=0, NotChecked=0, Total=162006 [2021-12-06 23:35:23,259 INFO L933 BasicCegarLoop]: 667 mSDtfsCounter, 3941 mSDsluCounter, 19395 mSDsCounter, 0 mSdLazyCounter, 13296 mSolverCounterSat, 1365 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3941 SdHoareTripleChecker+Valid, 20062 SdHoareTripleChecker+Invalid, 14661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1365 IncrementalHoareTripleChecker+Valid, 13296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.2s IncrementalHoareTripleChecker+Time [2021-12-06 23:35:23,259 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3941 Valid, 20062 Invalid, 14661 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1365 Valid, 13296 Invalid, 0 Unknown, 0 Unchecked, 24.2s Time] [2021-12-06 23:35:23,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14622 states. [2021-12-06 23:35:23,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14622 to 9997. [2021-12-06 23:35:23,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9997 states, 9996 states have (on average 1.4232693077230891) internal successors, (14227), 9996 states have internal predecessors, (14227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:35:23,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9997 states to 9997 states and 14227 transitions. [2021-12-06 23:35:23,736 INFO L78 Accepts]: Start accepts. Automaton has 9997 states and 14227 transitions. Word has length 80 [2021-12-06 23:35:23,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:35:23,736 INFO L470 AbstractCegarLoop]: Abstraction has 9997 states and 14227 transitions. [2021-12-06 23:35:23,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.16) internal successors, (158), 50 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:35:23,736 INFO L276 IsEmpty]: Start isEmpty. Operand 9997 states and 14227 transitions. [2021-12-06 23:35:23,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-12-06 23:35:23,740 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:35:23,740 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:35:23,746 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (24)] Ended with exit code 0 [2021-12-06 23:35:23,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 23:35:23,941 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:35:23,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:35:23,942 INFO L85 PathProgramCache]: Analyzing trace with hash 1519845463, now seen corresponding path program 2 times [2021-12-06 23:35:23,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 23:35:23,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [129087407] [2021-12-06 23:35:23,944 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 23:35:23,944 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 23:35:23,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 23:35:23,946 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 23:35:23,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d49c5aa-baf6-441d-8815-1cb34b50426c/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-12-06 23:35:24,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 23:35:24,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:35:24,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 44 conjunts are in the unsatisfiable core [2021-12-06 23:35:24,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:35:27,474 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:35:27,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:35:32,861 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:35:32,862 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 23:35:32,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [129087407] [2021-12-06 23:35:32,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [129087407] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:35:32,862 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 23:35:32,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2021-12-06 23:35:32,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090330582] [2021-12-06 23:35:32,862 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 23:35:32,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-12-06 23:35:32,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 23:35:32,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-12-06 23:35:32,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=2290, Unknown=0, NotChecked=0, Total=2450 [2021-12-06 23:35:32,863 INFO L87 Difference]: Start difference. First operand 9997 states and 14227 transitions. Second operand has 50 states, 50 states have (on average 3.16) internal successors, (158), 50 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)